Serhan and colleagues introduced the term "Resoleomics" in 1996 as the process of inflammation resolution. The major discovery of Serhan's work is that onset to conclusion of an inflammation is a controlled process of the immune system (IS) and not simply the consequence of an extinguished or "exhausted" immune reaction. Resoleomics can be considered as the evolutionary mechanism of restoring homeostatic balances after injury, inflammation and infection. Under normal circumstances, Resoleomics should be able to conclude inflammatory responses. Considering the modern pandemic increase of chronic medical and psychiatric illnesses involving chronic inflammation, it has become apparent that Resoleomics is not fulfilling its potential resolving capacity. We suggest that recent drastic changes in lifestyle, including diet and psycho-emotional stress, are responsible for inflammation and for disturbances in Resoleomics. In addition, current interventions, like chronic use of anti-inflammatory medication, suppress Resoleomics. These new lifestyle factors, including the use of medication, should be considered health hazards, as they are capable of long-term or chronic activation of the central stress axes. The IS is designed to produce solutions for fast, intensive hazards, not to cope with long-term, chronic stimulation. The never-ending stress factors of recent lifestyle changes have pushed the IS and the central stress system into a constant state of activity, leading to chronically unresolved inflammation and increased vulnerability for chronic disease. Our hypothesis is that modern diet, increased psycho-emotional stress and chronic use of anti-inflammatory medication disrupt the natural process of inflammation resolution ie Resoleomics.
The number of people suffering from chronic diseases such as cardiovascular diseases (CVD), diabetes, respiratory diseases, mental disorders, autoimmune diseases (AID) and cancers has increased dramatically over the last three decades. The increasing rates of these chronic systemic illnesses suggest that inflammation [1, 2], caused by excessive and inappropriate innate immune system (IIS) activity, is unable to respond appropriately to danger signals that are new in the context of evolution. This leads to unresolved or chronic inflammatory activation in the body.
Inflammation is designed to limit invasions and damage after injury, a process which has been essential for the survival of Homo sapiens in the absence of medication such as antibiotics. Recently, it has been discovered that onset to conclusion of an inflammation is a self-limiting and controlled process of the immune system (IS). This process of inflammation resolution is defined by Serhan as Resoleomics , a term which will be used throughout this article.
Our genes and physiology, which are still almost identical to those of our hunter-gatherer ancestors of 100,000 years ago, preserve core regulation and recovery processes [4, 5]. Nowadays our genes operate in an environment which is completely different to the one for which they were designed.
Modern man is exposed to an environment which has changed enormously since the time of the industrial revolution. In recent decades there has been a tremendous acceleration in innovations which have changed our lives completely. As a consequence, more than 75% of humans do not meet the minimum requirement of the estimated necessary daily physical activity , 72% of modern food types is new in human evolution , psycho-emotional stress has increased and man is exposed to an overwhelming amount of information on a daily basis. All these factors combine to produce an environment full of modern danger signals which continuously activate the IIS and central stress axes. The question is whether the IIS and its natural inflammatory response, Resoleomics, can still function optimally in this modern, fast-changing environment, considering that the IIS is designed to produce short, intensive reactions to acute external danger [8, 9]. It would seem that in the bodies of people who have adopted a Western lifestyle the inflammatory response is not concluded because of an initial excessive or subnormal onset of the response .
This article postulates how triggers from chronic altered diet and psycho-emotional stress negatively influence Resoleomics, thereby increasing susceptibility to the development of chronic, low-grade, inflammation-based diseases due to the constant activation of both the central stress axes and the IIS. In addition, an attempt is made to demonstrate the ways in which the use of anti-inflammatory medication could influence Resoleomics.
Resoleomics, a self-limiting process of inflammation
Serhan and his colleagues  introduced the term Resoleomics to describe a self-limiting process of inflammation, executed and controlled by the innate immune system (IIS) and regulated by the sympathetic nervous system (SNS) and the hypothalamus-pituitary-adrenal (HPA) axis. This process controls inflammation using metabolites produced from arachidonic acid (AA), eicosapentaenoic acid (EPA) and docosahexenoic acid (DHA). Resoleomics operates locally when polymorphonuclear neutrophils (PMNs) are attracted by increased pro-inflammatory cytokine and eicosanoids production during microbial invasion, wound healing or chemical injury. The function is to limit the inflammation response. The central control system of the inflammatory reaction is very complex. Local and central processes influence each other and both are responsible for an optimal resolving response (Figure 1). The local process can be divided into three phases  (Figure 2):
Pro-inflammatory eicosanoids, like leukotrienes B4 (LTB4) and prostaglandins (PGs) initiate the inflammatory response. PMNs generate LTB4 and PGE2 from precursor AA with the use of lipoxygenase-5 (LOX-5) and cyclo-oxygenase 2 (COX-2). Both eicosanoids enhance inflammation, LTB4 being the strongest chemotoxic compound of cytotoxic neutrophils. PGE2 and/or PGD2, although initially pro-inflammatory, determine the switch to the next phase, the resolution of the inflammation.
This phase starts with the Eicosanoid Switch to resolution. When the PGE2 and/or PGD2 level is equal to the level of LTB4, the PMNs activate the switch from pro-inflammatory to anti-inflammatory eicosanoids production by limiting the production of LOX-5. This switch is responsible for the production of anti-inflammatory lipoxins (LXs) from AA through activation of lipoxygenase -12 (LOX-12), lipoxygenase-15 (LOX-15) and acetylated COX-2 [13, 14]. This last mechanism has been found to be responsible for the production of more stable aspirin-triggered LXs (ATLs) with a longer half-value period . Other resolving metabolites that support LXs are resolvins, (neuro)protectins and maresins produced from respectively EPA and DHA [11, 16]. A second substantial increase of COX-2 activity will produce anti-inflammatory PGs (PGD2 and PGF2a) during this phase .
This phase starts when the Stop Signal takes place. This happens when sufficient anti-inflammatory mediators such as LXs are available to stop the pro-inflammatory process [13, 14]. LXs are capable of inhibiting both PMN infiltration and the activity of cytotoxic cells of the ISS, inducing phagocytosis to clear debris by non-cytoxic macrophages and attenuating an accumulation of the pro-inflammatory transcription factors, ie nuclear factor-kappaB (NF-kB) and activator protein 1 (AP-1) [18, 19].
Central stress axes and Resoleomics
This section deals solely with the effect of the sympathetic, parasympathetic and the HPA axis on Resoleomics. The systemic stress system is closely linked to the IIS via the stress axes of our body. Anything that can activate the sympathetic-adrenal-medulla (SAM) and HPA axes will have its effect on the IIS  and therefore on Resoleomics. Seen in reverse, it is precisely the IIS that can trigger stress axes, inducing a systemic stress reaction in the body . In the SNS, which initially activates the IIS, inhibition of the IIS is provided by the strong anti-inflammatory neurotransmitter acetylcholine (ACh), produced by the parasympathetic nervous system .
The systemic stress reaction follows a two-wave pattern. Activation of the SAM axis is considered the first wave, giving rise to the excretion of brain norepinephrine (NE) by the Locus Coeruleus (LC). The descending pathway activates sympathetic motor neurons in the medulla oblongata, which stimulate the adrenal glands (through sympathetic efferent nerves). The adrenal gland will now excrete catecholamines, which activate and induce proliferation of ISS cells. NF-kB increases pro-inflammatory cytokines production, such as interleukin 1-beta (IL1-β), interleukin 6 (IL-6) and tumor necrosis factor (TNF). Both the IIS and Th1 of the adaptive IS contain receptors sensitive to catecholamines. Cerebral catecholamines affect the activity of spleen, thymus, bone marrow and lymphoid nodes . NE has been shown to activate the IIS at the onset of inflammation, while long-term activation of the SNS induces IIS inhibition .
The second wave of the systemic stress reaction corresponds with the activation of the HPA axis, with glucocorticoids (GCs) as end product. Cortisol is capable of inhibiting the IIS through the upward regulation of inhibiting factor kappa B (IkB), while informing the immunological cortex through the migration of different immune cells to the brain [25, 26]. Cortisol, the regulator of the IIS response, can guide the inflammation into resolution phase. Termination is instigated when cortisol "overrules" the NE effect on NF-kB signalling through genetic influence and reduction of transcription of the NF-kB sensitive pro-inflammatory gene, resulting in the finalization of the inflammatory response (Figure 2).
This "termination" effect of cortisol is normally supported by a compensatory anti-inflammatory response through activation of the vagal anti-inflammatory loop . The resulting production of ACh inhibits the IS through the alfa-7-nicotin-Acetylcholinergic Receptor (α7nAChR)  (Figure 1).
The SNS (NE) increases the initial pro-inflammatory immune response in the initiation phase, whereas delayed cortisol response, induced by the HPA axis, inhibits the pro-inflammatory response . Integrity of the SAM axis with its NE response/reaction is necessary for an adequate initial inflammatory response . At the beginning of the initiation phase, there is resistance to both cortisol and insulin in order to allow for the activation of the IIS . At the end of this phase, cortisol sensitivity and insulin sensitivity should be recovered to facilitate the Eicosanoid Switch to the resolution phase.
Chronic stress exposure reduces the capacity to mount an acute stress response , resulting in an inadequate pro-inflammatory response. Chronic (psycho-emotional) stress situations can be responsible for the continuous production of catecholamines by the SAM axis. People suffering from "perpetual stress", for example the parents of a child with cancer, showed chronic, increased levels of circulating pro-inflammatory cytokines . This situation requires a high level of energy expenditure. The metabolic rate is increased to provide extra energy for the brain (arousal of all senses), the heart muscle and the locomotive system. The existing cells from the IIS are activated and will proliferate (relatively low energy expenditure), whereas proliferation of new immune cells (much more costly energy expenditure) will be blocked. Further consequences of chronic SAM activity are narrowing of the cell spectrum of the IIS and complete loss of activity of the Th1 section of the adaptive IS, leading to an insufficient capability to fight viruses, (pre)neoplastic cells and intracellularly presented pathogens .
An inflammatory response leading to solution depends on the sensitivity of glucocorticoid receptors (GR) and catecholamine receptors of the IIS . Factors such as stress endured early in life, trauma and polymorphisms are possible risk factors for loss of GR and catecholamine sensitivity [33–35].
Suboptimal inflammatory response as a consequence of chronic stress prevents the Eicosanoid Switch from functioning, since the switch to the resolution phase requires recovered cortisol and insulin sensitivity. The initiation phase should have a maximum duration of 8 to 12 hrs. PMN number and activation levels should reach their maximum during this phase; longer duration caused by chronic stress could produce secondary damage to neighbouring tissues due to the strong cytotoxic effects of activated PMNs . Supramaximal activation of PMNs could sensitize the adapted IS if contact time between self-antigens and the IS is significantly increased [11, 29].
The crosstalk between the IS and stress axes is further evidenced by the fact that acute production of high levels of catecholamines activate the IIS strongly , whereas eicosanoids produced from AA induce the production of local and systemic catecholamines . Long-term activation may lead to catecholamine resistance and lack of eicosanoid production. This situation, combined with the aforementioned possibility of resistance to insulin and cortisol, provokes a suboptimal inflammatory response and consequently the perpetuation and development of low-grade inflammation [26, 37].
Nutritional factors and Resoleomics
Several dietary factors influence the activity of the IIS and the function of a wide range of hormones, including cortisol, insulin and catecholamines. The dramatic changes in dietary composition since the agricultural revolution (some 10,000 years ago) and, to a greater extent, since the industrial revolution (some 200 years ago) have turned the intake of food into a common daily danger and therefore a cause of continuous systemic stress. Some of these changes include an increase in the omega 6/omega 3 fatty acid ratio, a high intake of saturated fatty acids (SFA) and refined carbohydrates, the introduction of industrially produced trans fatty acids, a lower intake of vitamins D and K, imbalanced intake of antioxidants, high intake of anti-nutrients (eg lectines, saponins) and an altered intake of dietary fibre .
The following section will discuss the impact of the changed ratio of polyunsaturated fatty acids (PUFAs) and the intake of food with a high glycemic load on Resoleomics. The pro-inflammatory effects of anti-nutrients present in cereals , potatoes , legumes , and tomato have previously been extensively reviewed .
Role of PUFAs in inflammation
The intake ratio of α-linoleic acid (LA) (omega 6), α-linolenic acid (ALA) (omega 3), docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) in the Western diet has changed dramatically compared to the estimated intake ratio of hunter-gatherer diets from 2-3:1 to 10-20:1 in the contemporary diet [42, 43]. All of these PUFAs are essential for normal Resoleomics response, as they function as precursors for the special small mediators responsible for the instigation and conclusion of the inflammatory response. One of the toxic changes in fatty acid composition of food corresponds to the increased intake of LA since the production of vegetable oils in 1913. Increased LA levels affect the inflammation process in three ways (Figure 3):
Increase of the omega 6/omega 3 fatty acid ratio
Altered AA level
Increases of inflammatory compounds, leukotoxins (LK) production
Increased omega 6/omega 3 fatty acid ratio
The inflammatory effect of a high omega 6/omega 3 fatty acid ratio during inflammation has been demonstrated in recent human studies [44, 45], in vitro studies [46, 47] and animal studies [48, 49]. The higher LA levels in phospholipids in plasma and cell membranes seem to be a major factor responsible for incomplete Resoleomics reactions. Higher intake of omega 3 fatty acids in the form of DHA and EPA regulate the production of pro-inflammatory cytokines and decrease LA levels in phospholipids in plasma and cell membranes [46, 48]. The conversion of LA and ALA into respectively AA, DHA and EPA depend on the same enzymes in the desaturase and elongase cascade, with δ-6-desaturase as the rate-limiting enzyme (Figure 4) .
Human trials investigating the effects of omega 3 dietary supplements showed significant improvements of symptoms in patients suffering from diseases such as RA, inflammatory bowel disease, asthma, psoriasis, breast cancer and CVD. However, full remission of symptoms was not achieved [43, 51]. Our conclusion is that an increased intake of omega 3 alone is not enough to restore Resoleomics; the intake of LA must be decreased as well.
LA effect on AA level
Higher AA levels in plasma result in more adequate inflammatory reactions, since AA is a precursor of pro- and anti-inflammatory substances within the self-limiting inflammatory process . LA is the precursor for AA in the desaturase/elongase conversion (Figure 4). Theoretically, LA could be the source of a sufficient level of endogenous AA. However, higher intake of LA does not deliver increased levels of AA in comparison to low intake [53, 54]. To achieve the required AA level, AA should be present in the regular diet . The combined situation of AA deficiency together with a reduced intake of omega 3 fatty acids such as DHA and EPA (necessary for the flip flop reaction of LOX-5 and the Eicosanoid Switch ), enable a perpetuation of the pro-inflammatory initiation phase and therefore of chronic inflammation.
Increased production of leukotoxin
The third harmful effect of high LA intake is the possible production of so-called leukotoxins (LK). High LA levels are metabolized by CYP2C9 in the liver into biologically active oxidation products known as LK and leukotoxin diol (LTD). These metabolites promote oxidative stress responses and the activation of NFkB and AP-1, increasing the systemic release of pro-inflammatory cytokines . LK and LTD are toxic for T cells, and can kill these cells with pathways resembling necrosis and programmed cell death .
Role of high glycemic food in Inflammation
An abundant intake of high glycemic food appears to be related to an increased susceptibility to the development of chronic inflammation, as has been demonstrated by several research groups [57–59]. The consequences of a high carbohydrate diet are complex and multiple. The pathways leading to disturbances of normal inflammation are:
High glycemic food intake increases inflammation markers
High glycemic food intake causes hyperglycemia and hyperinsulinemia leading to disturbed balances in insulin growth factor-1 (IGF-1) and androgens
Chronic intake of high glycemic food causes hypoglycemia, which triggers central stress axes
High Glycemic food increases inflammation markers
Various clinical trials have shown that an abundant intake of high glycemic food increases inflammatory markers and markers of metabolic syndrome such as postprandial NFkB in mononuclear cells , high sensitive-C-Reactive Protein (hs-CRP), interleukin (IL)-6, IL-7, IL-18 , levels of free radicals , cholesterol, triglycerides  and even blood pressure . Changes incurred by following a low glycemic diet include improved insulin sensitivity, lower blood pressure and total cholesterol, which are all key markers of the metabolic syndrome [58, 60, 61]. The high glucose-induced inflammatory response is accompanied by hyperinsulinemia and insulin resistance, characteristic for people suffering from obesity [57, 59]. Increased hsCRP values, hyperinsulinemia and insulin resistance are strongly related to CVD risk . Glycemic index (GI) and glycemic load (GL) have therefore been proposed as biomarkers and predictors for (chronic) inflammation .
Hyperglycemia and hyperinsulinemia
Cordain demonstrated that high glycemic food is a potential risk factor for inflammation through disturbed signalling of mechanisms as a result of hyperglycemia and hyperinsulinemia  (Figure 5b). Long exposure to high glucose levels in blood, which leads to a slow recovery of the homeostasis, makes tissues vulnerable to disease . High plasma insulin can increase the production of IGF-1 and androgens. Both hormones are related to disorders such as polycystic ovarian syndrome (PCOS) , epithelial cell cancer (breast, prostate, colon) [67, 68], acne , androgenic alopecia , and acanthosis nigricans . Several pathways in this respect have been previously described in medical literature, but these go beyond the scope of this article.
Hypoglycemia triggers the systemic stress system
As previously mentioned, intake of a high glycemic diet can cause hyperglycemia and hyperinsulinemia. Hyperglycemia will push abundant glucose via insulin into muscle and adipocytes at the instigation of the inflammatory process. However, continuous intake of high glycemic food results in reactive hypoglycemia, ie an energy-deficient situation which threatens the homeostasis of the body. As a consequence, the brain will maintain its own energy supply aimed at the survival of the organism (the selfish brain) . To ensure sufficient energy supply, the brain activates its systemic stress system to induce gluconeogenesis (Figure 5a). Excreted catecholamines and cortisol will mobilize extra energy, which is allocated with priority to the brain and to the activated IS, at the expense of other body tissues .
On the basis of the above information and other referenced data, it seems plausible to state that aspects of the Western diet, of the modern industrialised environment and of their resultant lifestyles form a chronic danger to the body, triggering both the central stress axes and the IIS into a state of chronic activity. This state seems to be a direct cause of the development of low-grade inflammation and consequently of chronic inflammatory diseases (Figure 5a).
Impact of current medication on Resoleomics
The role of the IIS is to limit the damage of inflammation in acute situations. Anti-inflammatory medication can be used to dampen the immune response. Nowadays, as a result of lifestyle changes, man is exposed to chronic inflammation and consequently to the chronic use of anti-inflammatory medication, much of which in fact suppresses Resoleomics. Current medication used to treat chronic inflammatory diseases does suppress the symptoms of inflammation, but complete remission of the disease is seldom realized . Resoleomics is hindered and complete resolution of the inflammation does not take place. Modern chronic inflammatory diseases are treated by several groups of medication. In this article we focus on rheumatoid arthritis (RA) medication as an example. Four groups of anti-inflammatory RA medication are taken into account: the prostaglandin inhibitors [Nonsteroidal anti-inflammatory drugs [NSAIDs: Aspirin (ASA) and COX-inhibitors], the Glucocorticoids (GCs), the Disease Modifying Drugs [DMARDs: Methotrexate (MTX) and Sulfasalazine (SSZ)] and the cytokine blockers [Biological agents: anti TNF-αlpha and IL-1 blockers]. The mechanisms of action and possible effects on the IIS and Resoleomics are summarized from literature (see Table 1). Most current therapies target the IIS in an attempt to inhibit the production of pro-inflammatory chemical mediators (Table 1). However, an equally important target is the active induction of pro-resolution programs by stromal cells such as fibroblasts within the inflamed tissues . Inhibition of MIF  and production of NO  are not addressed in this article.
Current RA treatments and their effect on immune system cells and predicted effect on Resoleomics
Mechanism of action
Current RA treatment effects on Immune System Cells
Negative: Immune cell activity ↓: switch from phase 1 to 2 ↓
Positive effect of ASA and GCs on Resoleomics
Medical intervention should stimulate the endogenous pathways of resolution and two drugs already known to possess these qualities are central to contemporary medicine: glucocorticoids (GCs)  and aspirin (ASA) [106, 107]. It is apparent that ASA and GCs have a positive effect on Resoleomics, while other medications prolong the initiation phase, tempering and/or blocking the resolution and termination phase of Resoleomics in various ways (Table 1). The positive effect of ASA on Resoleomics can be ascribed to its ability to produce ASA-triggered lipoxins (ATLs) through acetylation (and not through an irreversible inhibition) of the COX-2 enzymes . These ATLs show many pro-resolving properties, which are essential in the resolution and termination phase of the inflammation process [79, 108]. Long-term intake of high doses of ASA blocks PGE2 production and initiates the resolution phase without affecting the biosynthesis of other pro-resolving mediators . Low and high doses of ASA increase the production of lipoxin A4 (LXA4) and 15-epi-LXA4 in the rat brain, suggesting that ASA could protect against neuroinflammation . However, because of its side effects, ASA is no longer the treatment of choice for RA. In high doses, inhibition of the COX-1 enzyme by ASA is responsible for damage to the stomach lining.
ASA and also GCs activate the ALX/FRP2 receptor, making them the ideal collaborator in the resolution process . GCs-induced annexin-1 protein (ANXA1) [110, 111] as well as ASA-induced ATLs act on the same ALX/FPR2 receptor and dampen PMN infiltration [77, 80]. ANXA1 also inhibits the phospholipids A2 enzyme (PLA2). Reduced PLA2 activity appears to reduce AA release from the cell membrane [32, 112], which possibly leads to decreased levels of both PGs and LTs and to the delay of resolution. Besides their anti-inflammatory effects, GCs have a positive influence on resolution by enhancing macrophage migration and phagocytosis [11, 113].
Adverse effects of medication on Resoleomics
The use of anti-inflammatory medication without the capacity to induce (complete) resolution should be considered solution-toxic, ie hindering Resoleomics. NSAIDs are strong inhibitors of COX-2 and less of COX-1 enzymes . Almost complete COX-2 inhibition decreases the PGs synthesis, and consequently leads to a higher production of LTs via LOX-5 in PMNs . PGE2 and PgD2 decrease the activity of LOX-5, decreasing neutrophil activity and facilitating the end of the inflammatory phase and the instigation of resolution.
Immune-suppressors such as SSZ (and less powerful GCs) almost completely block NF-kB transcription, leading to insufficient cytokine production and suboptimal inflammation . Again the resolution process will not be completed, with perpetuation of inflammation as the logical consequence.
Perhaps the most deleterious drugs, interfering negatively with resolution, are TNF-alpha inhibitors such as anti TNF-alpha and MTX. MTX inhibits the proliferation of the IIS cells, decreasing the production and accumulation of adenosine within the IS cells [88, 116]. These effects lead to rapid anti-inflammatory effects and symptom release. However, because of its side effects and incomplete resolution, this medication is qualified as solution-toxic. This conclusion is supported by many patients who have discontinued this treatment .
Another group of possible solution-toxic drugs are biological agents with an inhibiting effect on TNF-alpha and IL-1. Biological agents together with DMARDS (Table 1) are strong anti-inflammatory compounds, decreasing the production of pro-inflammatory cytokines. The absence or insufficient activity of pro-inflammatory cytokines decreases cell communication and induction of COX-2 in activated neutrophils. This can lead to less production of resolution substances such as PgE2, PgD2 and lipoxins [54, 103]. Furthermore, DMARDs and biological agents appear to reduce the functioning and number of IIS cells, causing suboptimal inflammation and possibly inflammation perpetuation .
Long-term activity of the IIS results in low-grade inflammation and chronic disease. Over the past years, ideas regarding the treatment of inflammation have started to change as evidence accumulates which shows that, although the targeting of infiltrating immune cells can control the inflammatory response, it does not lead to its complete resolution and a return to homeostasis, which is essential for healthy tissue and good health in general.
Hotamisligil describes how low-grade, chronic inflammation ('meta-inflammation') induced by a nutritional and metabolic surplus, is accompanied by disturbed metabolic pathways and chronic metabolic disorders. He states that this inflammatory response differs from the classical inflammation response caused by injury . However, others have shown that the classical response of the IIS dealing with injuries can be linked to activation of the central stress axes [26, 28]. This article specifically discusses the relationship between the over-activated systemic stress system and the self-limited process of inflammation, known as Resoleomics, executed and controlled by the innate immune system (IIS).
Changes in lifestyle which are new to our evolutionary process should be considered a major trigger in causing chronic activation of the IS and consequently of the central stress axes and vice versa, thereby leading to chronic diseases such as cardiovascular diseases (CVD), diabetes, respiratory diseases, mental disorders, auto-immune diseases (AID) and cancers. This article evaluates two of the lifestyle changes which contribute to long-term activity of the ISS, namely, nutrition and continuous psycho-emotional stress. Other risk factors such as physical inactivity , genetic susceptibility , smoking, environmental toxicity and shift work  fall beyond the scope of this article but should not be ruled out.
Nutrition is an important factor in understanding the development of chronic inflammation. The current Western diet can disturb the resolution response in various ways (Figure 6). In the Ancestral human diet, foodstuffs with an increased risk of inflammation were virtually unknown, while nutrients able to activate the IIS are now abundant in our diet [38, 120]. Cordain's research has focused on relating these anti-nutrients in food (eg lectines, saponines) to the development of chronic inflammation and autoimmune diseases (AID) [7, 39]. Fortunately, it seems that the human body possesses a strong capacity to recover from illness. If our genes are exposed to their 'original' environment by intake of an ancestral human diet, their function can recover rapidly. Research has shown that obese persons improve their blood markers after just 10 days following a paleolithic diet consisting of fish, lean meat, fruit, vegetables and nuts . Similar results have been found in a study with aboriginals suffering from Diabetes II, who showed normalized blood markers after returning to their traditional lifestyle for seven weeks .
People suffering from chronic inflammatory disease demonstrate over-activated central stress axes, which then lead to catecholamines, cortisol and insulin resistance. McGowan et al  show the impact of childhood abuse on the epigenetic pattern of different genes including the gene for GR in the hippocampus. They found a decreased level of GR and an increased methylation pattern of the GR gene, giving rise to a situation of lower cortisol sensibility and altered HPA stress responses. This could make people more vulnerable to developing diseases. An altered sensitivity to cortisol has been linked to diseases such as rheumatoid arthritis (RA) , post-traumatic stress syndrome , chronic fatigue syndrome , inflammatory diseases and AID in general .
The key priority in the treatment of people with chronic inflammation is to induce the Eicosanoid Switch to the anti-inflammatory resolution phase. Long-lasting cortisol resistance and insulin resistance will definitely delay or block complete resolution. The combination of local factors (ie DHA deficiency, low levels of protectins) disturbing the process of complete resolution (ie Resoleomics) and the absence of adequate NE and cortisol signalling can be responsible for perpetuatual inflammation by delaying the resolution phase of the inflammatory response (Figure 7).
Current anti-inflammatory medication used in RA treatment is aimed at the suppression of the IIS and its inflammatory response and thus hinders Resoleomics. In addition, these medication interventions do not solve underlying catecholamine, cortisol and insulin resistance, and consequently making it impossible to achieve full recovery of the chronic inflammation. This suggests that chronic use of anti-inflammatory medication in fact impedes the body from making a full recovery. Furthermore, the ongoing low-grade inflammation will continuously trigger the activity of the systemic stress system .
Health care should focus on early detection of silent, ongoing and low-grade inflammation in order to avoid the development of many chronic diseases. Further research is needed to validate a questionnaire which addresses early symptoms of chronic low-grade inflammation, ie avoidance of exercise, fatigue, emotional flatness, social isolation, decreased libido, hyper or hyposomnia, obsessive behaviour or sensitivity to addiction [6, 128].
We have made an effort to demonstrate that the science of Resoleomics can help to find new ways to treat people suffering from diseases based on chronic inflammation. Since over-activated central stress axes directly delay Resoleomics, and thereby delay the resolution of inflammation, treatment should focus on restoring the central stress system to its default, healthy homeostasis. Dietary changes, psycho-emotional stress release and physical activity should always be included in treatment of all chronic inflammatory diseases.
MMB and MLvW, MD treat patients with chronic diseases in a private practice. LP, a practising psychoneuroimmunologist and associate Professor at the University of Gerona, Spain, has developed valuable insights into the metabolic pathways of chronic diseases, which he has applied in the treatment of numerous patients.
Lipoxin A(4) receptor
Annexin 1 protein
Activator protein 1
Stable aspirin-triggered lipoxin
High sensitive-C- Reactive Protein
Disease Modifying Drugs
Insulin growth factor-1
Innate immune system
Norepinephrine (ie noradrenaline)
Nonsteroidal anti-inflammatory drugs
Polycystic ovarian syndrome
Prostaglandins/prostaglandin E2, D2, F2a
Phospholipase A2 enzyme
Polyunsaturated fatty acids
Saturated fatty acids
Sympathetic nervous system
Tumour necrosis factor.
University of Girona, Plaça Sant Domènec
Kolb H, Mandrup-Poulsen T: The global diabetes epidemic as a consequence of lifestyle-induced low-grade inflammation. Diabetologia. 2010, 53: 10-20. 10.1007/s00125-009-1573-7.View Article
Miller AH, Maletic V, Raison CL: Inflammation and its discontents: the role of cytokines in the pathophysiology of major depression. Biol Psychiatry. 2009, 65: 732-741. 10.1016/j.biopsych.2008.11.029.View Article
Serhan CN, Chiang N: Novel endogenous small molecules as the checkpoint controllers in inflammation and resolution: entree for resoleomics. Rheum Dis Clin North Am. 2004, 30: 69-95. 10.1016/S0889-857X(03)00117-0.View Article
Macaulay V, Richards M, Hickey E, Vega E, Cruciani F, Guida V, Scozzari R, Bonne-Tamir B, Sykes B, Torroni A: The emerging tree of West Eurasian mtDNAs: a synthesis of control-region sequences and RFLPs. Am J Hum Genet. 1999, 64: 232-249. 10.1086/302204.View Article
Smith E, Morowitz HJ: Universality in intermediary metabolism. Proc Natl Acad Sci USA. 2004, 101: 13168-13173. 10.1073/pnas.0404922101.View Article
Pruimboom L: Physical inactivity is a disease synonymous for a non-permissive brain disorder. Med Hypothesis. 2011, 77: 708-713. 10.1016/j.mehy.2011.07.022.View Article
Cordain L, Toohey L, Smith MJ, Hickey MS: Modulation of immune function by dietary lectins in rheumatoid arthritis. Br J Nutr. 2000, 83: 207-217.View Article
Straub RH, Cutolo M, Buttgereit F, Pongratz G: Energy regulation and neuroendocrine-immune control in chronic inflammatory diseases. J Intern Med. 2010, 267: 543-560. 10.1111/j.1365-2796.2010.02218.x.View Article
Peters A, Hitze B, Langemann D, Bosy-Westphal A, Muller MJ: Brain size, body size and longevity. Int J Obes. 2005, 34: 1349-1352.View Article
Serhan CN: Resolution phase of inflammation: novel endogenous anti-inflammatory and proresolving lipid mediators and pathways. Annu Rev Immunol. 2007, 25: 101-137. 10.1146/annurev.immunol.25.022106.141647.View Article
Muskiet FAJ: The evolutionairy background, cause and consequences of chronic system low grade inflammation. Significance for clinical chemistry. Ned Tijdschr Klin Chem Labgeneesk. 2011, 36: 199-214.
Bannenberg GL, Chiang N, Ariel A, Arita M, Tjonahen E, Gotlinger KH, Hong S, Serhan CN: Molecular circuits of resolution: formation and actions of resolvins and protectins. J Immunol. 2005, 174: 4345-4355.View Article
Gilroy DW, Colville-Nash PR, Willis D, Chivers J, Paul-Clark MJ, Willoughby DA: Inducible cyclooxygenase may have anti-inflammatory properties. Nat Med. 1999, 5: 698-701. 10.1038/9550.View Article
Serhan CN, Maddox JF, Petasis NA, Akritopoulou-Zanze I, Papayianni A, Brady HR, Colgan SP, Madara JL: Design of lipoxin A4 stable analogs that block transmigration and adhesion of human neutrophils. Biochemistry. 1995, 34: 14609-14615. 10.1021/bi00044a041.View Article
Willoughby DA, Moore AR, Colville-Nash PR: COX-1, COX-2, and COX-3 and the future treatment of chronic inflammatory disease. Lancet. 2000, 355: 646-648. 10.1016/S0140-6736(99)12031-2.View Article
Maddox JF, Serhan CN: Lipoxin A4 and B4 are potent stimuli for human monocyte migration and adhesion: selective inactivation by dehydrogenation and reduction. J Exp Med. 1996, 183: 137-146. 10.1084/jem.183.1.137.View Article
Maderna P, Godson C: Taking insult from injury: lipoxins and lipoxin receptor agonists and phagocytosis of apoptotic cells. Prostaglandins Leukot Essent Fatty Acids. 2005, 73: 179-187. 10.1016/j.plefa.2005.05.004.View Article
Miller GE, Chen E, Sze J, Marin T, Arevalo JM, Doll R, Ma R, Cole SW: A functional genomic fingerprint of chronic stress in humans: blunted glucocorticoid and increased NF-kappaB signaling. Biol Psychiatry. 2008, 64: 266-272. 10.1016/j.biopsych.2008.03.017.View Article
Rosas-Ballina M, Tracey KJ: The neurology of the immune system: neural reflexes regulate immunity. Neuron. 2009, 64: 28-32. 10.1016/j.neuron.2009.09.039.View Article
Elenkov IJ: Neurohormonal-cytokine interactions: implications for inflammation, common human diseases and well-being. Neurochem Int. 2008, 52: 40-51. 10.1016/j.neuint.2007.06.037.View Article
Elenkov IJ, Wilder RL, Chrousos GP, Vizi ES: The sympathetic nerve-an integrative interface between two supersystems: the brain and the immune system. Pharmacol Rev. 2000, 52: 595-638.
Kin NW, Sanders VM: It takes nerve to tell T and B cells what to do. J Leukoc Biol. 2006, 79: 1093-1104. 10.1189/jlb.1105625.View Article
Peters A, Schweiger U, Pellerin L, Hubold C, Oltmanns KM, Conrad M, Schultes B, Born J, Fehm HL: The selfish brain: competition for energy resources. Neurosci Biobehav Rev. 2004, 28: 143-180. 10.1016/j.neubiorev.2004.03.002.View Article
Miller GE, Cohen S, Ritchey AK: Chronic psychological stress and the regulation of pro-inflammatory cytokines: a glucocorticoid-resistance model. Health Psychol. 2002, 21: 531-541.View Article
Guarini S, Cainazzo MM, Giuliani D, Mioni C, Altavilla D, Marini H, Bigiani A, Ghiaroni V, Passaniti M, Leone S: Adrenocorticotropin reverses hemorrhagic shock in anesthetized rats through the rapid activation of a vagal anti-inflammatory pathway. Cardiovasc Res. 2004, 63: 357-365. 10.1016/j.cardiores.2004.03.029.View Article
Wang H, Yu M, Ochani M, Amella CA, Tanovic M, Susarla S, Li JH, Wang H, Yang H, Ulloa L: Nicotinic acetylcholine receptor alpha7 subunit is an essential regulator of inflammation. Nature. 2003, 421: 384-388. 10.1038/nature01339.View Article
Liezmann C, Klapp B, Peters EM: Stress, atopy and allergy: A re-evaluation from a psychoneuroimmunologic persepective. Dermatol Endocrinol. 2011, 3: 37-40.View Article
Whitaker AM, Sulzer J, Walker E, Mathis K, Molina PE: Sympathetic modulation of the host defense response to infectious challenge during recovery from hemorrhage. Neuroimmunomodulation. 2010, 17: 349-358. 10.1159/000292039.View Article
Rhen T, Cidlowski JA: Antiinflammatory action of glucocorticoids-new mechanisms for old drugs. N Engl J Med. 2005, 353: 1711-1723. 10.1056/NEJMra050541.View Article
Heim C, Newport DJ, Bonsall R, Miller AH, Nemeroff CB: Altered pituitary-adrenal axis responses to provocative challenge tests in adult survivors of childhood abuse. Am J Psychiatry. 2001, 158: 575-581. 10.1176/appi.ajp.158.4.575.View Article
Danese A, Moffitt TE, Pariante CM, Ambler A, Poulton R, Caspi A: Elevated inflammation levels in depressed adults with a history of childhood maltreatment. Arch Gen Psychiatry. 2008, 65: 409-415. 10.1001/archpsyc.65.4.409.View Article
Simmons RA: Role of metabolic programming in the pathogenesis of beta-cell failure in postnatal life. Rev Endocr Metab Disord. 2007, 8: 95-104. 10.1007/s11154-007-9045-1.View Article
Malcher-Lopes R, Buzzi M: Glucocorticoid-regulated crosstalk between arachidonic acid and endocannabinoid biochemical pathways coordinates cognitive-, neuroimmune-, and energy homeostasis-related adaptations to stress. Vitam Horm. 2009, 81: 263-313.View Article
Pace TW, Hu F, Miller AH: Cytokine-effects on glucocorticoid receptor function: relevance to glucocorticoid resistance and the pathophysiology and treatment of major depression. Brain Behav Immun. 2007, 21: 9-19. 10.1016/j.bbi.2006.08.009.View Article
Cordain L, Eaton SB, Sebastian A, Mann N, Lindeberg S, Watkins BA, O'Keefe JH, Brand-Miller J: Origins and evolution of the Western diet: health implications for the 21st century. Am J Clin Nutr. 2005, 81: 341-354.
Simopoulos AP: Overview of evolutionary aspects of omega 3 fatty acids in the diet. World Rev Nutr Diet. 1998, 83: 1-11.View Article
Simopoulos AP: Evolutionary aspects of diet, the omega-6/omega-3 ratio and genetic variation: nutritional implications for chronic diseases. Biomed Pharmacother. 2006, 60: 502-507. 10.1016/j.biopha.2006.07.080.View Article
Guebre-Egziabher F, Rabasa-Lhoret R, Bonnet F, Bastard JP, Desage M, Skilton MR, Vidal H, Laville M: Nutritional intervention to reduce the n-6/n-3 fatty acid ratio increases adiponectin concentration and fatty acid oxidation in healthy subjects. Eur J Clin Nutr. 2008, 62: 1287-1293. 10.1038/sj.ejcn.1602857.View Article
Liou YA, King DJ, Zibrik D, Innis SM: Decreasing linoleic acid with constant alpha-linolenic acid in dietary fats increases (n-3) eicosapentaenoic acid in plasma phospholipids in healthy men. J Nutr. 2007, 137: 945-952.
Wang L, Reiterer G, Toborek M, Hennig B: Changing ratios of omega-6 to omega-3 fatty acids can differentially modulate polychlorinated biphenyl toxicity in endothelial cells. Chem Biol Interact. 2008, 172: 27-38. 10.1016/j.cbi.2007.11.003.View Article
Chene G, Dubourdeau M, Balard P, Escoubet-Lozach L, Orfila C, Berry A, Bernad J, Aries MF, Charveron M, Pipy B: n-3 and n-6 polyunsaturated fatty acids induce the expression of COX-2 via PPARgamma activation in human keratinocyte HaCaT cells. Biochim Biophys Acta. 2007, 1771: 576-589.View Article
Ghosh S, Novak EM, Innis SM: Cardiac proinflammatory pathways are altered with different dietary n-6 linoleic to n-3 alpha-linolenic acid ratios in normal, fat-fed pigs. Am J Physiol Heart Circ Physiol. 2007, 293: H2919-H2927. 10.1152/ajpheart.00324.2007.View Article
Riediger ND, Azordegan N, Harris-Janz S, Ma DW, Suh M, Moghadasian MH: 'Designer oils' low in n-6:n-3 fatty acid ratio beneficially modifies cardiovascular risks in mice. Eur J Nutr. 2009, 48: 307-314. 10.1007/s00394-009-0015-0.View Article
Nakamura MT, Nara TY: Structure, function, and dietary regulation of delta6, delta5, and delta9 desaturases. Annu Rev Nutr. 2004, 24: 345-376. 10.1146/annurev.nutr.24.121803.063211.View Article
Calder PC: Session 3: Joint Nutrition Society and Irish Nutrition and Dietetic Institute Symposium on 'Nutrition and autoimmune disease' PUFA, inflammatory processes and rheumatoid arthritis. Proc Nutr Soc. 2008, 67: 409-418. 10.1017/S0029665108008690.View Article
Ferrucci L, Cherubini A, Bandinelli S, Bartali B, Corsi A, Lauretani F, Martin A, Andres-Lacueva C, Senin U, Guralnik JM: Relationship of plasma polyunsaturated fatty acids to circulating inflammatory markers. J Clin Endocrinol Metab. 2006, 91: 439-446.View Article
Adam O, Tesche A, Wolfram G: Impact of linoleic acid intake on arachidonic acid formation and eicosanoid biosynthesis in humans. Prostaglandins Leukot Essent Fatty Acids. 2008, 79: 177-181. 10.1016/j.plefa.2008.09.007.View Article
McInnes IB, Schett G: Cytokines in the pathogenesis of rheumatoid arthritis. Nat Rev Immunol. 2007, 7: 429-442. 10.1038/nri2094.View Article
Viswanathan S, Hammock BD, Newman JW, Meerarani P, Toborek M, Hennig B: Involvement of CYP 2 C9 in mediating the proinflammatory effects of linoleic acid in vascular endothelial cells. J Am Coll Nutr. 2003, 22: 502-510.View Article
Mangan DF, Taichman NS, Lally ET, Wahl SM: Lethal effects of Actinobacillus actinomycetemcomitans leukotoxin on human T lymphocytes. Infect Immun. 1991, 59: 3267-3272.
Dickinson S, Hancock DP, Petocz P, Ceriello A, Brand-Miller J: High-glycemic index carbohydrate increases nuclear factor-kappaB activation in mononuclear cells of young, lean healthy subjects. Am J Clin Nutr. 2008, 87: 1188-1193.
Liu S, Manson JE, Buring JE, Stampfer MJ, Willett WC, Ridker PM: Relation between a diet with a high glycemic load and plasma concentrations of high-sensitivity C-reactive protein in middle-aged women. Am J Clin Nutr. 2002, 75: 492-498.
Hu Y, Block G, Norkus EP, Morrow JD, Dietrich M, Hudes M: Relations of glycemic index and glycemic load with plasma oxidative stress markers. Am J Clin Nutr. 2006, 84: 70-76. quiz:266-267
Esposito K, Marfella R, Ciotola M, Di Palo C, Giugliano F, Giugliano G, D'Armiento M, D'Andrea F, Giugliano D: Effect of a mediterranean-style diet on endothelial dysfunction and markers of vascular inflammation in the metabolic syndrome: a randomized trial. JAMA. 2004, 292: 1440-1446. 10.1001/jama.292.12.1440.View Article
Du H, van der AD, van Bakel MM, van der Kallen CJ, Blaak EE, van Greevenbroek MM, Jansen EH, Nijpels G, Stehouwer CD, Dekker JM, Feskens EJ: Glycemic index and glycemic load in relation to food and nutrient intake and metabolic risk factors in a Dutch population. Am J Clin Nutr. 2008, 87: 655-661.
Pereira MA, Swain J, Goldfine AB, Rifai N, Ludwig DS: Effects of a low-glycemic load diet on resting energy expenditure and heart disease risk factors during weight loss. JAMA. 2004, 292: 2482-2490. 10.1001/jama.292.20.2482.View Article
Halton TL, Willett WC, Liu S, Manson JE, Albert CM, Rexrode K, Hu FB: Low-carbohydrate-diet score and the risk of coronary heart disease in women. N Engl J Med. 2006, 355: 1991-2002. 10.1056/NEJMoa055317.View Article
Cordain L, Eades MR, Eades MD: Hyperinsulinemic diseases of civilization: more than just Syndrome X. Comp Biochem Physiol A Mol Integr Physiol. 2003, 136: 95-112. 10.1016/S1095-6433(03)00011-4.View Article
Nappo F, Esposito K, Cioffi M, Giugliano G, Molinari AM, Paolisso G, Marfella R, Giugliano D: Postprandial endothelial activation in healthy subjects and in type 2 diabetic patients: role of fat and carbohydrate meals. J Am Coll Cardiol. 2002, 39: 1145-1150. 10.1016/S0735-1097(02)01741-2.View Article
Ehrmann DA: Polycystic ovary syndrome. N Engl J Med. 2005, 352: 1223-1236. 10.1056/NEJMra041536.View Article
Goodwin PJ, Ennis M, Bahl M, Fantus IG, Pritchard KI, Trudeau ME, Koo J, Hood N: High insulin levels in newly diagnosed breast cancer patients reflect underlying insulin resistance and are associated with components of the insulin resistance syndrome. Breast Cancer Res Treat. 2009, 114: 517-525. 10.1007/s10549-008-0019-0.View Article
Tran TT, Naigamwalla D, Oprescu AI, Lam L, McKeown-Eyssen G, Bruce WR, Giacca A: Hyperinsulinemia, but not other factors associated with insulin resistance, acutely enhances colorectal epithelial proliferation in vivo. Endocrinology. 2006, 147: 1830-1837.View Article
Smith RN, Mann NJ, Braue A, Makelainen H, Varigos GA: A low-glycemic-load diet improves symptoms in acne vulgaris patients: a randomized controlled trial. Am J Clin Nutr. 2007, 86: 107-115.
Matilainen V, Laakso M, Hirsso P, Koskela P, Rajala U, Keinanen-Kiukaanniemi S: Hair loss, insulin resistance, and heredity in middle-aged women. A population-based study. J Cardiovasc Risk. 2003, 10: 227-231.View Article
Peters A, Langemann D: Build-ups in the supply chain of the brain: on the neuroenergetic cause of obesity and type 2 diabetes mellitus. Front Neuroenergetics. 2009, 1: 2-View Article
Gaujoux-Viala C, Smolen JS, Landewe R, Dougados M, Kvien TK, Mola EM, Scholte-Voshaar M, van Riel P, Gossec L: Current evidence for the management of rheumatoid arthritis with synthetic disease-modifying antirheumatic drugs: a systematic literature review informing the EULAR recommendations for the management of rheumatoid arthritis. Ann Rheum Dis. 2010, 69: 1004-1009. 10.1136/ard.2009.127225.View Article
Filer A, Pitzalis C, Buckley CD: Targeting the stromal microenvironment in chronic inflammation. Curr Opin Pharmacol. 2006, 6: 393-400. 10.1016/j.coph.2006.03.007.View Article
Das UN: Vagal nerve stimulation in prevention and management of coronary heart disease. World J Cardiol. 2010, 3: 105-110.View Article
Desneves KJ, Todorovic BE, Cassar A, Crowe TC: Treatment with supplementary arginine, vitamin C and zinc in patients with pressure ulcers: a randomised controlled trial. Clin Nutr (Edinburgh, Scotland). 2005, 24: 979-987. 10.1016/j.clnu.2005.06.011.View Article
Perretti M, Chiang N, La M, Fierro IM, Marullo S, Getting SJ, Solito E, Serhan CN: Endogenous lipid- and peptide-derived anti-inflammatory pathways generated with glucocorticoid and aspirin treatment activate the lipoxin A4 receptor. Nat Med. 2002, 8: 1296-1302. 10.1038/nm786.View Article
Roth GJ, Stanford N, Majerus PW: Acetylation of prostaglandin synthase by aspirin. Proc Natl Acad Sci USA. 1975, 72: 3073-3076. 10.1073/pnas.72.8.3073.View Article
Serhan CN: Lipoxins and aspirin-triggered 15-epi-lipoxins are the first lipid mediators of endogenous anti-inflammation and resolution. Prostaglandins Leukot Essent Fatty Acids. 2005, 73: 141-162. 10.1016/j.plefa.2005.05.002.View Article
Gilroy DW: The role of aspirin-triggered lipoxins in the mechanism of action of aspirin. Prostaglandins Leukot Essent Fatty Acids. 2005, 73: 203-210. 10.1016/j.plefa.2005.05.007.View Article
Claria J, Serhan CN: Aspirin triggers previously undescribed bioactive eicosanoids by human endothelial cell-leukocyte interactions. Proc Natl Acad Sci USA. 1995, 92: 9475-9479. 10.1073/pnas.92.21.9475.View Article
Paul-Clark MJ, Van Cao T, Moradi-Bidhendi N, Cooper D, Gilroy DW: 15-epi-lipoxin A4-mediated induction of nitric oxide explains how aspirin inhibits acute inflammation. J Exp Med. 2004, 200: 69-78. 10.1084/jem.20040566.View Article
Serhan CN, Takano T, Chiang N, Gronert K, Clish CB: Formation of endogenous "antiinflammatory" lipid mediators by transcellular biosynthesis: Lipoxins and aspirin-triggered lipoxins inhibit neutrophil recruitment and vascular permeability. Am J Respir Crit Care Med. 2000, 161: S95-S101.View Article
Bertolini A, Ottani A, Sandrini M: Dual acting anti-inflammatory drugs: a reappraisal. Pharmacol Res. 2001, 44: 437-450. 10.1006/phrs.2001.0872.View Article
Warner TD, Mitchell JA: Cyclooxygenases: new forms, new inhibitors, and lessons from the clinic. FASEB J. 2004, 18: 790-804. 10.1096/fj.03-0645rev.View Article
Wahl C, Liptay S, Adler G, Schmid RM: Sulfasalazine: a potent and specific inhibitor of nuclear factor kappa B. J Clin Invest. 1998, 101: 1163-1174. 10.1172/JCI992.View Article
Baggott JE, Morgan SL, Ha TS, Alarcon GS, Koopman WJ, Krumdieck CL: Antifolates in rheumatoid arthritis: a hypothetical mechanism of action. Clin Exp Rheumatol. 1993, 11 (Suppl 8): S101-S105.
Chan ES, Cronstein BN: Methotrexate-how does it really work?. Nat Rev Rheumatol. 2010, 6: 175-178. 10.1038/nrrheum.2010.5.View Article
Cronstein BN: Molecular therapeutics. Methotrexate and its mechanism of action. Arthritis Rheum. 1996, 39: 1951-1960. 10.1002/art.1780391203.View Article
Cronstein BN, Naime D, Ostad E: The antiinflammatory mechanism of methotrexate. Increased adenosine release at inflamed sites diminishes leukocyte accumulation in an in vivo model of inflammation. J Clin Invest. 1993, 92: 2675-2682. 10.1172/JCI116884.View Article
Herman S, Zurgil N, Deutsch M: Low dose methotrexate induces apoptosis with reactive oxygen species involvement in T lymphocytic cell lines to a greater extent than in monocytic lines. Inflamm Res. 2005, 54: 273-280. 10.1007/s00011-005-1355-8.View Article
Herman S, Zurgil N, Langevitz P, Ehrenfeld M, Deutsch M: he immunosuppressive effect of methotrexate in active rheumatoid arthritis patients vs. its stimulatory effect in nonactive patients, as indicated by cytometric measurements of CD4+ T cell subpopulations. Immunol Invest. 2004, 33: 351-362. 10.1081/IMM-120039865.View Article
Kim YJ, Song M, Ryu JC: Mechanisms underlying methotrexate-induced pulmonary toxicity. Expert Opin Drug Saf. 2009, 8: 451-458. 10.1517/14740330903066734.View Article
Nesher G, Moore TL: The in vitro effects of methotrexate on peripheral blood mononuclear cells. Modulation by methyl donors and spermidine. Arthritis Rheum. 1990, 33: 954-959. 10.1002/art.1780330706.View Article
Olsen NJ, Murray LM: Antiproliferative effects of methotrexate on peripheral blood mononuclear cells. Arthritis Rheum. 1989, 32: 378-385. 10.1002/anr.1780320404.View Article
Phillips DC, Woollard KJ, Griffiths HR: The anti-inflammatory actions of methotrexate are critically dependent upon the production of reactive oxygen species. Br J Pharmacol. 2003, 138: 501-511. 10.1038/sj.bjp.0705054.View Article
Sperling RI, Coblyn JS, Larkin JK, Benincaso AI, Austen KF, Weinblatt ME: Inhibition of leukotriene B4 synthesis in neutrophils from patients with rheumatoid arthritis by a single oral dose of methotrexate. Arthritis Rheum. 1990, 33: 1149-1155.View Article
Thomas R, Carroll GJ: Reduction of leukocyte and interleukin-1 beta concentrations in the synovial fluid of rheumatoid arthritis patients treated with methotrexate. Arthritis Rheum. 1993, 36: 1244-1252. 10.1002/art.1780360909.View Article
van Ede AE, Laan RF, Blom HJ, De Abreu RA, van de Putte LB: Methotrexate in rheumatoid arthritis: an update with focus on mechanisms involved in toxicity. Semin Arthritis Rheum. 1998, 27: 277-292. 10.1016/S0049-0172(98)80049-8.View Article
Scott DL, Kingsley GH: Tumor necrosis factor inhibitors for rheumatoid arthritis. N Engl J Med. 2006, 355: 704-712. 10.1056/NEJMct055183.View Article
Raza K, Falciani F, Curnow SJ, Ross EJ, Lee CY, Akbar AN, Lord JM, Gordon C, Buckley CD, Salmon M: Early rheumatoid arthritis is characterized by a distinct and transient synovial fluid cytokine profile of T cell and stromal cell origin. Arthritis Res Ther. 2005, 7: R784-R795. 10.1186/ar1733.View Article
Planaguma A, Titos E, Lopez-Parra M, Gaya J, Pueyo G, Arroyo V, Claria J: Aspirin (ASA) regulates 5-lipoxygenase activity and peroxisome proliferator-activated receptor alpha-mediated CINC-1 release in rat liver cells: novel actions of lipoxin A4 (LXA4) and ASA-triggered 15-epi-LXA4. FASEB J. 2002, 16: 1937-1939.
Bannenberg GL: Therapeutic applicability of anti-inflammatory and proresolving polyunsaturated fatty acid-derived lipid mediators. Sci World J. 2010, 10: 676-712.View Article
Yacoubian S, Serhan CN: New endogenous anti-inflammatory and proresolving lipid mediators: implications for rheumatic diseases. Nat Clin Pract Rheumatol. 2007, 3: 570-579. 10.1038/ncprheum0616. quiz 571 p following 589View Article
Basselin M, Ramadan E, Chen M, Rapoport SI: Anti-inflammatory effects of chronic aspirin on brain arachidonic acid metabolites. Neurochem Res. 2011, 36: 139-145. 10.1007/s11064-010-0282-4.View Article
Scheinman RI, Cogswell PC, Lofquist AK, Baldwin AS: Role of transcriptional activation of I kappa B alpha in mediation of immunosuppression by glucocorticoids. Science. 1995, 270: 283-286. 10.1126/science.270.5234.283.View Article
MacDermott RP, Schloemann SR, Bertovich MJ, Nash GS, Peters M, Stenson WF: Inhibition of antibody secretion by 5-aminosalicylic acid. Gastroenterology. 1989, 96: 442-448.
Tanabe T, Tohnai N: Cyclooxygenase isozymes and their gene structures and expression. Prostaglandins Other Lipid Mediat. 2002, 68-69: 95-114.View Article
Miller AH: Depression and immunity: a role for T cells?. Brain Behav Immun. 2010, 24: 1-8. 10.1016/j.bbi.2009.09.009.View Article
Vane JR: Inhibition of prostaglandin synthesis as a mechanism of action for aspirin-like drugs. Nat New Biol. 1971, 231: 232-235.View Article
Fiorucci S, Distrutti E, de Lima OM, Romano M, Mencarelli A, Barbanti M, Palazzini E, Morelli A, Wallace JL: Relative contribution of acetylated cyclo-oxygenase (COX)-2 and 5-lipooxygenase (LOX) in regulating gastric mucosal integrity and adaptation to aspirin. FASEB J. 2003, 17: 1171-1173.
Fall CHD: Developmental origins of cardiovascular disease, type 2 diabetes and obesity in humans. Early Life Orig Health Dis. 2006, 2: 8-28.View Article
Egger G, Dixon J: Inflammatory effects of nutritional stimuli: further support for the need for a big picture approach to tackling obesity and chronic disease. Obes Rev. 2010, 11: 137-149. 10.1111/j.1467-789X.2009.00644.x.View Article
Frassetto LA, Schloetter M, Mietus-Synder M, Morris RC: Sebastian A: Metabolic and physiologic improvements from consuming a paleolithic, hunter-gatherer type diet. Eur J Clin Nutr. 2009, 63: 947-955. 10.1038/ejcn.2009.4.View Article
O'Dea K: Marked improvement in carbohydrate and lipid metabolism in diabetic Australian aborigines after temporary reversion to traditional lifestyle. Diabetes. 1984, 33: 596-603. 10.2337/diabetes.33.6.596.View Article
McGowan PO, Sasaki A, D'Alessio AC, Dymov S, Labonte B, Szyf M, Turecki G, Meaney MJ: Epigenetic regulation of the glucocorticoid receptor in human brain associates with childhood abuse. Nat Neurosci. 2009, 12: 342-348. 10.1038/nn.2270.View Article
Cutolo M, Foppiani L, Minuto F: Hypothalamic-pituitary-adrenal axis impairment in the pathogenesis of rheumatoid arthritis and polymyalgia rheumatica. J Endocrinol Invest. 2002, 25: 19-23.View Article
Strohle A, Scheel M, Modell S, Holsboer F: Blunted ACTH response to dexamethasone suppression-CRH stimulation in posttraumatic stress disorder. J Psychiatr Res. 2008, 42: 1185-1188. 10.1016/j.jpsychires.2008.01.015.View Article
Van Den Eede F, Moorkens G, Van Houdenhove B, Cosyns P, Claes SJ: Hypothalamic-pituitary-adrenal axis function in chronic fatigue syndrome. Neuropsychobiology. 2007, 55: 112-120. 10.1159/000104468.View Article
Cobb JM, Steptoe A: Psychosocial stress and susceptibility to upper respiratory tract illness in an adult population sample. Psychosom Med. 1996, 58: 404-412.View Article
Segerstrom SC: Social networks and immunosuppression during stress: relationship conflict or energy conservation?. Brain Behav Immun. 2008, 22: 279-284. 10.1016/j.bbi.2007.10.011.View Article
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.