Skip to main content
Download PDF
Download ePub

β3-adrenoceptor agonist prevents alterations of muscle diacylglycerol and adipose tissue phospholipids induced by a cafeteria diet

Nutrition & Metabolism volume 1, Article number: 4 (2004) Cite this article

Abstract

Background

Insulin resistance induced by a high fat diet has been associated with alterations in lipid content and composition in skeletal muscle and adipose tissue. Administration of β3-adrenoceptor (β3-AR) agonists was recently reported to prevent insulin resistance induced by a high fat diet, such as the cafeteria diet. The objective of the present study was to determine whether a selective β3-AR agonist (ZD7114) could prevent alterations of the lipid profile of skeletal muscle and adipose tissue lipids induced by a cafeteria diet.

Methods

Male Sprague-Dawley rats fed a cafeteria diet were treated orally with either the β3-AR agonist ZD7114 (1 mg/kg per day) or the vehicle for 60 days. Rats fed a chow diet were used as a reference group. In addition to the determination of body weight and insulin plasma level, lipid content and fatty acid composition in gastronemius and in epididymal adipose tissue were measured by gas-liquid chromatography, at the end of the study.

Results

In addition to higher body weights and plasma insulin concentrations, rats fed a cafeteria diet had greater triacylglycerol (TAG) and diacylglycerol (DAG) accumulation in skeletal muscle, contrary to animals fed a chow diet. As expected, ZD7114 treatment prevented the excessive weight gain and hyperinsulinemia induced by the cafeteria diet. Furthermore, in ZD7114 treated rats, intramyocellular DAG levels were lower and the proportion of polyunsaturated fatty acids, particularly arachidonic acid, in adipose tissue phospholipids was higher than in animals fed a cafeteria diet.

Conclusions

These results show that activation of the β3-AR was able to prevent lipid alterations in muscle and adipose tissue associated with insulin resistance induced by the cafeteria diet. These changes in intramyocellular DAG levels and adipose tissue PL composition may contribute to the improved insulin sensitivity associated with β3-AR activation.

Background

Dietary fatty acids are known to influence the composition of stored triacylglycerol (TAG) and membrane phospholipids (PL) in adipose tissue [1]. More recently, it was demonstrated that the lipid profile in skeletal muscle reflected dietary lipids [2–4]. Furthermore, the modifications of fatty acid concentrations and composition in tissue lipids induced by a high fat diet has been associated with alterations in lipid metabolism and insulin sensitivity [5, 6]. Indeed, enrichment of membrane PL with saturated fatty acids (SFA) was able to impair insulin action in skeletal muscle and adipose tissue, whereas a higher proportion of polyunsaturated fatty acids (PUFA) improved insulin sensitivity in these tissues [7–9]. TAG accumulation in skeletal muscle was also correlated with the development of insulin resistance, independent to the degree of obesity [10–13]. Intramyocellular TAG could represent only a marker of insulin resistance whereas intracellular accumulation of long chain acyl-coenzyme A, ceramide or diacylglycerol (DAG) were reported to directly alter the insulin action [14].

Chronic activation of the β3-adrenoceptor (β3-AR), which is predominantly expressed in white and brown adipose tissue, by selective agonists exerts both anti-obesity and anti-diabetic effects in rodent models of obesity [15, 16]. Activation of this receptor has been reported to enhance energy expenditure via stimulation of thermogenesis in brown adipose tissue [16]. The improvement in glucose homeostasis induced by β3-AR agonists appears to be a consequence of increased insulin sensitivity in peripheral tissues rather than stimulation of insulin secretion by the pancreas [17]. Although, the expression of β3-AR in myocytes is still a matter of debate [18–20], obese rats treated with β3-AR agonists demonstrated an improvement of insulin sensitivity in brown and white adipose tissue as well as in skeletal muscle [17, 21, 22]. In adipose tissue this effect is believed to be mediated by the conversion of large adipocytes into small adipocytes, which are more sensitive to insulin [21]. In skeletal muscle, it seems more likely that the effects of β3-AR agonists on insulin sensitivity are mediated by alternate indirect mechanisms.

The objective of the present study was to determine whether a selective β3-AR agonist could prevent alterations in the profile of skeletal muscle and adipose tissue lipids induced with the consumption of the cafeteria diet, previously reported to induce weight gain and hyperinsulinemia [22, 23]. The selective β3-AR agonist ZD7114 was used in this study. When administered at 1 mg/kg/day, this compound has been shown to increase thermogenesis in rodents and dogs without increasing heart rate or β2-AR-mediated effects such as tremor [24]. ZD7114 pharmacological specificity was also demonstrated in brown adipocytes and smooth muscles [25, 26]. As expected, we observed that a chronic treatment with the ZD7114 prevented the development of excessive fat mass and hyperinsulinemia induced by this diet. These preventive beneficial effects exerted by the β3-AR agonist were associated with a reduction of muscle DAG accumulation. In adipose tissue, ZD7114 treatment was able to limit the proportional reduction of PUFA into the PL pool, induced by the cafeteria diet. Our results indicate that a β3-AR agonist prevents some cafeteria diet-induced alterations of the fatty acid profile of lipids in skeletal muscle and adipose tissue. Furthermore, we propose that these changes may contribute to the improved of insulin sensitivity observed in rats treated with a β3-AR agonist during the development of obesity.

Methods

Animal study

Male Sprague-Dawley rats were purchased from Charles River (L'arbesles, France) at 5–6 weeks of age. Animals were individually housed in temperature-controlled rooms (22°C) with a 12-h light-dark cycle. Ten days before the beginning of the study, 30 rats were provided a normal chow diet (Kliba-Nafalg, Switzerland) and free access to drinking water. At the end of this period, rats were weighed and pre-selected for their sensitivity to weight gain (i.e. rat presenting at least 35% weight gain after a 10-day selection period). The selected rats (n = 15) were equally randomized into 3 groups. A reference group, consisted of rats fed for 60 days with a standard pellet chow diet containing 28, 57 and 15% E from protein, carbohydrate and fat, respectively (REF group). The remaining rats were fed for 60 days with a cafeteria diet composed of 30 g of a mix containing salami, cookies, cheese, sausage, chips, chocolate and almonds in a proportion of 2:2:2:1:1:1:1 and 30 g of the reference group chow diet. This mixed diet contained 26, 27 and 47% energy as protein, carbohydrate and fat, respectively. At the beginning of the dietary intervention, both groups fed the cafeteria diet received daily, by gavage (0.5 ml/100 g body weight), either the selective β-3AR agonist ZD7114 at 1 mg/kg per day (CAF-ZD group) or water alone (CAF group) until day 60. Rats from the REF group (chow diet) also received a daily gavage of water (0.5 ml/100 g body weight).

Body weight and food intake were recorded daily. Rats were fasted for 8 hours before sacrifice, performed under isoflurane anaesthesia. Tissues were immediately collected, weighed, frozen in liquid nitrogen and kept at -80°C until analysed.

All procedures in the study were in compliance with the ethical committee of the "Service vétérinaire du canton de Vaud".

Estimation of the proportions of the different lipid classes contained in the cafeteria diet (see Discussion) was performed using the USDA Nutrient Database.

Lipid fatty acid composition

Adipose tissue

Fatty acid composition of lipids in adipose tissue was performed by Lipomics Technologies (West Sacramento, USA). Briefly, lipids were extracted from 30 mg of frozen epididymal adipose tissue in the presence of authentic internal standards by the method of Folch et al. [27] using chloroform:methanol (2:1, by vol.). After separation of individual lipid classes by preparative thin-layer chromatography, the TAG and PL were scraped and trans-esterified; the resulting fatty acid methyl esters were then separated and quantified by capillary gas chromatography as previously described [28].

Muscle

The frozen gastrocnemius muscle was thawed and thoroughly dissected under stereomicroscope to remove extramyocellular adipose tissue. Lipids from lyophilized, finely powdered, dissected muscle (50 mg) were extracted according to the method of Folch [27]. PL (19:0), TAG (17:0) and DAG (15:0) internal standards (Varian; Zug, Switzerland) were added prior to lipid extraction. The lipids were loaded on a Chromabond NH2 cartridge (Varian; Zug, Switzerland), and neutral lipids were separated from free fatty acids and PL by sequential elution with chloroform/2-Propanol (2:1), 2% acetic acid in diethylether and methanol, respectively [29]. The neutral lipids were subjected to thin-layer chromatography using hexane:diethylether:acetic acid (70:30:1, by vol.) as solvent system to separate DAG from TAG [30]. The hydrolysis of TAG into DAG during sample analysis has been assessed and represented less than 0.5% of total DAG. The fatty acids from the phospholipids, TAG and DAG were converted to their methyl esters. Fatty acid methyl-ester separation was performed by automated gas-liquid chromatography (HP 6890 series) with FID detection (280°C); authentic standard mixtures of fatty acid methyl-esters (Nu-Chek-Perp; Lowell Mutter, USA) were injected to identify fatty acid methyl-ester peaks. Results are expressed in μmol fatty acids per gram lyophilised muscle.

Plasma metabolites

Plasma glucose and insulin were determined with commercially available kits purchased from Sigma (Buchs, Switzerland) and Crystal Chem Inc. (Downers Grove, USA), respectively. Plasma triglycerides and free fatty acids concentrations were analysed using kits from Roche Diagnostic (Basel, Switzerland) and Wako Chemicals (Richmond, USA), respectively.

Statistical analysis

Comparisons of the means of the dependent variables of each group were performed using a one-way ANOVA.

Results

Body weight and fat mass

Male Sprague-Dawley rats were fed, during 60 days, either a chow diet used as a reference group (REF group), a cafeteria diet (CAF rats) or a cafeteria diet plus a daily gavage of the β3-AR agonist ZD7114 (CAF-ZD rats).

At day 60, the mean body weight of CAF rats was significantly greater than that of REF rats (Table 1). On the other hand, CAF-ZD rats presented a significant reduction in mean body weight when compared with CAF rats (Table 1). Similar effects were observed on weight gain which was 46% greater in CAF rats than in REF rats (Figure 1; 213.2 ± 12.2 g vs. 312.3 ± 19.2 g in REF and CAF rats, respectively; p < 0.01), and reduced by 17% in CAF-ZD rats as compared to CAF rats (258.70 ± 12.70 g in CAF-ZD rats, p < 0.05). The enhancement of body weight in CAF rats was strongly associated with the weight increase of two main deep adipose depots, confirming the obesigenic properties of the cafeteria diet. Indeed, the epididymal and retroperitoneal fat pads in CAF rats were respectively 131% and 185% heavier than those of REF rats (Table 1). ZD7114 treatment decreased the weight of the two adipose tissue depots by about 45%, compared to CAF rats (Table 1). The weights of gastrocnemius skeletal muscle, liver and heart were not different between groups (Table 1). As expected, CAF rats had a higher energy intake compared with REF animals (106.03 ± 7.25 vs 78.49 ± 2.96 kcal/day). However, the anti-obesity effect of ZD7114 was not attributed to a reduction of energy intake (107.70 ± 7.30 kcal/day in CAF-ZD rats).

Table 1 Body weight, tissues and fasting plasma metabolites
Full size table
Figure 1
figure 1

Individual weight changes. Body weight was measured in rats (n = 5) fed a chow diet (REF) or a cafeteria diet alone (CAF) or treated with 1 mg/kg/day ZD7114 (CAF-ZD) at the beginning and at the end of the different interventions (day 60). Data are represented as individual values.

Full size image

Glucose and insulin plasma concentrations

Measurement of insulin and glucose concentrations in plasma of fasted animals showed that CAF rats presented a marked hyperinsulinemia with a 4.6 fold increase in insulin concentration as compared to REF animals whereas the glucose level was not changed (Table 1). ZD7114 treatment limited the hyperinsulinemia induced by the cafeteria diet, as demonstrated by the 2.3 fold decrease in plasma insulin concentrations in CAF-ZD rats compared with the CAF group (Table 1). No significant changes in plasma glucose concentrations were observed between these two groups (Table 1).

Adipose tissue lipids

Lipid content

PL and TAG contents per gram of tissue were measured in epididymal adipose tissue of rats fed with a chow diet or a cafeteria diet treated or not with ZD7114. No significant change was observed in the concentration of PL and TAG in adipose tissue of CAF rats when compared with REF animals (Table 2). Furthermore, ZD7114 treatment did not affect adipose tissue lipid content of CAF rats.

Table 2 Adipose tissue lipid content
Full size table

Fatty acid composition

Analysis of the fatty acid profile shows that cafeteria diet induced an increase in the proportion of monounsaturated fatty acids (MUFA), which was compensated for by a reduction in the percentage of PUFA in both adipose PL and TAG (Figure 2). Changes in the proportion of MUFA in PL and TAG were mainly due to the increase of oleic acid (1.7 and 2.0 fold increase in PL and TAG, respectively; Table 3). Reduction in the percentage of linoleic acid was mainly responsible for the decrease in proportion of PUFA in both PL and TAG (1.6 and 2.3 fold decrease for PL and TAG, respectively; Table 3). The proportions of arachidonic and α-linolenic acids were also slightly decreased in PL and TAG, respectively (Table 3). Although the global proportion of SFA was not modified in adipose tissue PL and TAG of CAF rats when compared with REF animals, the percentage of myristic and stearic acids were respectively enhanced in PL and TAG of CAF animals.

Figure 2
figure 2

Proportion of the different lipid classes in adipose tissue. Saturated (SFA), monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA) were measured in epididymal adipose tissue phospholipid (PL) and triacylglycerol (TAG) of rats fed a chow diet (empty bars) or a cafeteria diet (black bars) alone or treated with ZD7114 (grey bars). Data are represented as mean ± SEM, and values significantly different to data measured in rats fed the chow or cafeteria diets are indicated by * (p < 0.05), ** (p < 0.01) or + (p < 0.05), respectively.

Full size image
Table 3 Composition of adipose tissue lipids
Full size table

ZD7114 treatment did not change the proportions of any lipid classes measured in adipose TAG of CAF rats (Figure 2). However, in PL, the percentage of PUFA was significantly increased by 1.3 fold in CAF-ZD rats compared to CAF animals. This change was essentially due to a two-fold increase in the proportion of arachidonic acid measured in CAF-ZD rats (Table 3). A slight reduction in the percentage of myristic acid (1.2 fold decrease) was measured in CAF-ZD rats compared to CAF animals.

Skeletal muscle lipids

Lipid content

PL, diacylglycerol (DAG) and TAG contents were measured in the gastrocnemius of REF animals and CAF rats with or without ZD7114 treatment (Table 4).

Figure 3
figure 3

Proportion of the different lipid classes in muscle. Saturated (SFA), monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA) were measured in muscle phospholipid (PL), triacylglycerol (TAG) and diacylglycerol (DAG) of rats fed a chow diet (empty bars), a cafeteria diet (black bars) alone or treated with ZD7114 (grey bars). Data are represented as mean ± SEM, and values significantly different to data measured in rats fed the chow or cafeteria diet are indicated by * (p < 0.05), ** (p < 0.01) or + (p < 0.05), ++ (p < 0.01), respectively.

Full size image

The cafeteria diet clearly induced TAG and DAG accumulation in the gastrocnemius, as demonstrated by the respective 3.4 and 2.0 fold increases observed in CAF vs. REF rats (Table 4). Chronic treatment with ZD7114 did not significantly reduce the cafeteria diet induced-accumulation of TAG in muscle. In contrast, DAG accumulation was prevented as indicated by a 1.5 fold reduction of DAG levels in CAF-ZD when compared with CAF rats (Table 4). Values of intramyocellular TAG and DAG obtained in the present study (TAG: between 1 to 4 μmol/g fresh muscle; DAG: between 0.5 to 1 μmol/g fresh muscle) were similar to those previously described in rat skeletal muscles [31] (TAG: between 4 to 5 μmol/g fresh muscle; DAG: between 0.5 to 2.5 μmol/ g fresh muscle).

Table 4 Muscle lipid content
Full size table

Fatty acid composition

Fatty acid profiles were determined in muscle PL, TAG and DAG. The gastrocnemius of CAF rats, compared with the REF group, presented an increase in the percentage of MUFA and a decrease in the proportion of PUFA in both TAG and DAG and to a lesser extent in PL (Figure 3). Variations in the percentage of oleic and linoleic acids were, respectively, responsible for the changes in the proportions of MUFA and PUFA in muscle TAG and DAG (Table 5). Modifications of the proportions of PUFA observed in muscle PL of CAF rats were due to slight decreases of both linoleic (1.4 fold increase) and docosahexaenoic (22:6 n-3) acids (1.3 fold increase), whereas the percentage of arachidonic acid (20:4 n-6) was increased by 1.2 fold.

Table 5 Composition of muscle lipids
Full size table

The influence of ZD7114 on the cafeteria-induced modification of fatty acid composition in the three lipid species was evaluated by comparing CAF rats with CAF-ZD rats. While ZD7114 did not affect the fatty acid profile of either TAG or PL in muscle of CAF rats, it induced changes in the fatty acid composition of muscle DAG. Indeed, the proportion of SFA was slightly (1.2 fold increase), but significantly, elevated in DAG of CAF-ZD rats with an increase in the proportion of palmitic and stearic acids (Table 5). Furthermore, the proportion of MUFA in DAG of CAF-ZD rat muscles was decreased compared with DAG of CAF rats. This change was essentially attributed to a decrease in the proportion of oleic acid (Table 5). Stearidonic acid (18.4 n-3) was only detected in DAG accumulated in muscles of ZD-CAF rats. No differences in the proportion of PUFA between DAG stored in muscles of CAF-ZD or CAF rats were observed (Figure 3).

Discussion

The present study demonstrates that feeding the cafeteria diet to rats not only promotes weight gain, hyperinsulinemia and hypertriglyceridemia, but also accumulation of lipids in skeletal muscle. Although TAG levels per gram of adipose tissue was not affected by the cafeteria diet, this dietary intervention strongly enhanced TAG accumulation in skeletal muscle, as previously described [4, 5]. We show that this intramyocellular accumulation of TAG was associated with an increase in skeletal muscle DAG content. This finding is in agreement with the accumulation of DAG observed in human skeletal muscle cells incubated with saturated fatty acids in vitro [12]. DAG mass was also described to be increased in skeletal muscle biopsies obtained from normal volunteers in whom insulin resistance was produced by raising FFA levels during a lipid infusion [32]. However, to our knowledge, the present study demonstrates for the first time that a high fat diet, resembling the human Western diet, was able to increase DAG storage in skeletal muscle. Although both TAG and DAG accumulations in skeletal muscle were reported to be correlated with insulin resistance [4, 5, 33], DAG (a precursor of TAG synthesis) is proposed to directly impair insulin sensitivity by inactivating insulin receptor activity through activation of the protein kinase C [34].

The fatty acid composition of TAG stored in muscle was previously shown to be affected by dietary lipids [2]. Interestingly, we also find that the fatty acid composition of muscle DAG was modified by the cafeteria diet. Indeed, the increase in MUFA and the reduction of PUFA proportions, measured in both DAG and TAG, reflected the difference in lipid composition of the two diets (+ 19% MUFA and -28% PUFA in cafeteria diet vs. chow diet). It is noteworthy that qualitative changes in DAG were reported to affect the activity of DAG as a secondary messenger, since specificity of its fatty acyl moieties for the activation of protein kinase C has been described [35, 36]. Although measurements of insulin sensitivity were not directly accessed in this study, our observation suggests that diet may regulate insulin response in muscle by modifying DAG composition.

Fatty acid compositions of muscle and adipose tissue PL were also modified by the cafeteria diet. More specifically, the proportion of PUFA in PL was decreased and MUFA was increased in both tissues. These differences were more pronounced in PL from adipose tissue than from gastrocnemius, indicating that membrane phospholipids in adipose tissue are more susceptible to variations in dietary composition than skeletal muscle. Interestingly, reductions in the proportion of PUFA in PL from myocytes [7] and adipocytes [8] were reported to impair insulin action.

As previously reported with Trecadrine, a selective β3-AR agonist [22], chronic administration of ZD7114 prevented the excess weight gain and fat accumulation induced by a cafeteria diet. This present report demonstrates that ZD7114 treatment reduced the hyperinsulinemia elicited by the cafeteria diet (by 2.3 fold), thereby suggesting an improvement of insulin sensitivity in the treated rats. This observation was associated with a significant reduction in the accumulation of skeletal muscle DAG, and a slight, non-significant decrease in TAG. It is tempting to suggest that the decrease in muscle DAG accumulation induced by the chronic administration of a β3-AR agonist could participate in the prevention of hyperinsulinemia. β3-AR agonist treatment significantly modified the fatty acid composition of DAG, causing a 1.2 fold reduction in the proportion of oleic acid. As mentioned before, these modifications in DAG composition could directly regulate insulin action in muscles. Since the presence of a β3-AR in skeletal muscle is still a subject of debate, it is difficult to elucidate the mechanism(s) by which the β3-AR agonist lowers DAG content in muscle and modifies its fatty acid composition.

Although the content and the fatty acid composition of TAG stored in adipose tissue was not affected by β3-AR agonist administration, the fatty acid profile of adipose PL was modified by the treatment. The β3-AR agonist was able to restore the proportion of PUFA to a level similar to the REF rats by increasing the percentage of arachidonic acid by 2 fold. As mentioned above, a greater percentage of PUFA in PL has been reported to enhance insulin sensitivity in adipose tissue. The changes in PL composition induced by the β3-AR agonist may be associated with the previously reported improved insulin sensitivity in adipose tissue [8], and the decrease of hyperinsulinemia measured in the present study.

Conclusions

Whilst the effectiveness of β3-AR agonists is limited in humans, understanding the metabolic changes affected in rodents will provide insights into mechanisms, underlying insulin responsiveness in humans. The present study demonstrates that β3-AR agonist treatment not only limits the hyperinsulinemia induced by a cafeteria diet, but also partially prevents the associated alterations in adipose and muscle lipid composition. Particularly, activation of the β3-AR limits the intramyocellular DAG accumulation and the decrease in the proportion of PUFA in adipose tissue PL. This combined action may contribute to the beneficial effect of β3-AR agonists on insulin sensitivity.

Abbreviations

CAF rats :

Rats fed with a cafeteria diet

DAG :

Diacylglycerol

MUFA :

Monounsaturated fatty acid

PKC :

Protein kinase C

PUFA :

Polyunsaturated fatty acid

REF rats :

Rats fed with a chow diet

SFA saturated fatty acid. TAG:

: Triacylglycerol

ZD-CAF rats :

Rats fed with a cafeteria diet and treated with the β3-AR agonist ZD7114.

References

  1. Field CJ, Angel A, Clandinin MT: Relationship of diet to the fatty acid composition of human adipose tissue structural and stored lipids. Am J Clin Nutr. 1985, 42: 1206-1220.

    CAS  Google Scholar 

  2. Andersson A, Nalsen C, Tengblad S, Vessby B: Fatty acid composition of skeletal muscle reflects dietary fat composition in humans. Am J Clin Nutr. 2002, 76: 1222-1229.

    CAS  Google Scholar 

  3. Storlien LH, Pan DA, Kriketos AD, O'Connor J, Caterson ID, Cooney GJ, Jenkins AB, Baur LA: Skeletal muscle membrane lipids and insulin resistance. Lipids. 1996, 31: S261-265.

    Article  CAS  Google Scholar 

  4. Guo ZK, Jensen MD: Accelerated intramyocellular triglyceride synthesis in skeletal muscle of high-fat-induced obese rats. Int J Obes Relat Metab Disord. 2003, 27: 1014-1019. 10.1038/sj.ijo.0802380.

    Article  CAS  Google Scholar 

  5. Storlien LH, Jenkins AB, Chisholm DJ, Pascoe WS, Khouri S, Kraegen EW: Influence of dietary fat composition on development of insulin resistance in rats. Relationship to muscle triglyceride and omega-3 fatty acids in muscle phospholipid. Diabetes. 1991, 40: 280-289.

    Article  CAS  Google Scholar 

  6. Clandinin MT, Cheema S, Field CJ, Garg ML, Venkatraman J, Clandinin TR: Dietary fat: exogenous determination of membrane structure and cell function. Faseb J. 1991, 5: 2761-2769.

    CAS  Google Scholar 

  7. Borkman M, Storlien LH, Pan DA, Jenkins AB, Chisholm DJ, Campbell LV: The relation between insulin sensitivity and the fatty-acid composition of skeletal-muscle phospholipids. N Engl J Med. 1993, 328: 238-244. 10.1056/NEJM199301283280404.

    Article  CAS  Google Scholar 

  8. Field CJ, Ryan EA, Thomson AB, Clandinin MT: Diet fat composition alters membrane phospholipid composition, insulin binding, and glucose metabolism in adipocytes from control and diabetic animals. J Biol Chem. 1990, 265: 11143-11150.

    CAS  Google Scholar 

  9. Sohal PS, Baracos VE, Clandinin MT: Dietary omega 3 fatty acid alters prostaglandin synthesis, glucose transport and protein turnover in skeletal muscle of healthy and diabetic rats. Biochem J. 1992, 286: 405-411.

    Article  CAS  Google Scholar 

  10. Boden G: Free fatty acids FFA), a link between obesity and insulin resistance. Front Biosci. 1998, 3: D169-175.

    CAS  Google Scholar 

  11. Kuhlmann J, Neumann-Haefelin C, Belz U, Kalisch J, Juretschke HP, Stein M, Kleinschmidt E, Kramer W, Herling AW: Intramyocellular lipid and insulin resistance: a longitudinal in vivo 1H-spectroscopic study in Zucker diabetic fatty rats. Diabetes. 2003, 52: 138-144.

    Article  CAS  Google Scholar 

  12. Montell E, Turini M, Marotta M, Roberts M, Noe V, Ciudad CJ, Mace K, Gomez-Foix AM: DAG accumulation from saturated fatty acids desensitizes insulin stimulation of glucose uptake in muscle cells. Am J Physiol Endocrinol Metab. 2001, 280: E229-237.

    CAS  Google Scholar 

  13. Listenberger LL, Han X, Lewis SE, Cases S, Farese RV, Ory DS, Schaffer JE: Triglyceride accumulation protects against fatty acid-induced lipotoxicity. Proc Natl Acad Sci U S A. 2003, 100: 3077-3082. 10.1073/pnas.0630588100.

    Article  CAS  Google Scholar 

  14. Boden G: Interaction between free fatty acids and glucose metabolism. Curr Opin Clin Nutr Metab Care. 2002, 5: 545-549. 10.1097/00075197-200209000-00014.

    Article  CAS  Google Scholar 

  15. de Souza CJ, Burkey BF: Beta 3-adrenoceptor agonists as anti-diabetic and anti-obesity drugs in humans. Curr Pharm Des. 2001, 7: 1433-1449.

    Article  CAS  Google Scholar 

  16. Umekawa T, Yoshida T, Sakane N, Saito M, Kumamoto K, Kondo M: Anti-obesity and anti-diabetic effects of CL316,243, a highly specific beta 3-adrenoceptor agonist, in Otsuka Long-Evans Tokushima Fatty rats: induction of uncoupling protein and activation of glucose transporter 4 in white fat. Eur J Endocrinol. 1997, 136: 429-437.

    Article  CAS  Google Scholar 

  17. Liu X, Perusse F, Bukowiecki LJ: Mechanisms of the antidiabetic effects of the beta 3-adrenergic agonist CL-316243 in obese Zucker-ZDF rats. Am J Physiol. 1998, 274: R1212-1219.

    CAS  Google Scholar 

  18. Emorine LJ, Marullo S, Briend-Sutren MM, Patey G, Tate K, Delavier-Klutchko C, Strosberg AD: Molecular characterization of the human beta 3-adrenergic receptor. Science. 1989, 245: 1118-1121.

    Article  CAS  Google Scholar 

  19. Nahmias C, Blin N, Elalouf JM, Mattei MG, Strosberg AD, Emorine LJ: Molecular characterization of the mouse beta 3-adrenergic receptor: relationship with the atypical receptor of adipocytes. Embo J. 1991, 10: 3721-3727.

    CAS  Google Scholar 

  20. Granneman JG, Lahners KN, Chaudhry A: Molecular cloning and expression of the rat beta 3-adrenergic receptor. Mol Pharmacol. 1991, 40: 895-899.

    CAS  Google Scholar 

  21. Kato H, Ohue M, Kato K, Nomura A, Toyosawa K, Furutani Y, Kimura S, Kadowaki T: Mechanism of amelioration of insulin resistance by beta3-adrenoceptor agonist AJ-9677 in the KK-Ay/Ta diabetic obese mouse model. Diabetes. 2001, 50: 113-122.

    Article  CAS  Google Scholar 

  22. Moreno-Aliaga MJ, Lamas O, Marti A, Martinez JA: Effects of a beta3-adrenergic agonist on glucose uptake and leptin expression and secretion in cultured adipocytes from lean and overweight (cafeteria) rats. Biochem Biophys Res Commun. 2002, 291: 1201-1207. 10.1006/bbrc.2002.6577.

    Article  CAS  Google Scholar 

  23. Davidson MB, Garvey D: Studies on mechanisms of hepatic insulin resistance in cafeteria-fed rats. Am J Physiol. 1993, 264: E18-23.

    CAS  Google Scholar 

  24. Holloway BR, Howe R, Rao BS, Stribling D: ICI D7114: a novel selective adrenoceptor agonist of brown fat and thermogenesis. Am J Clin Nutr. 1992, 55: 262S-264S.

    CAS  Google Scholar 

  25. Growcott JW, Wilson C, Holloway B, Mainwaring S: Evaluation of ICI D a putative stimulant of brown adipocytes, on histamine-contracted guinea-pig ileum. Br J Pharmacol. 1993, 109: 1212-1218.

    Article  CAS  Google Scholar 

  26. Lezama EJ, Konkar AA, Salazar-Bookaman MM, Miller DD, Feller DR: Pharmacological study of atypical beta-adrenoceptors in rat esophageal smooth muscle. Eur J Pharmacol. 1996, 308: 69-80. 10.1016/0014-2999(96)00236-1.

    Article  CAS  Google Scholar 

  27. Folch J, Lees M, Stanley GHS: A simple method for the isolation and purification of total lipides from animal tissues. J Chem Biochem. 1957, 22: 497-509.

    Google Scholar 

  28. Watkins SM, Reifsnyder PR, Pan HJ, German JB, Leiter EH: Lipid metabolome-wide effects of the PPARgamma agonist rosiglitazone. J Lipid Res. 2002, 43: 1809-1817. 10.1194/jlr.M200169-JLR200.

    Article  CAS  Google Scholar 

  29. Kaluzny MA, Duncan LA, Merritt MV, Epps DE: Rapid separation of lipid classes in high yield and purity using bonded phase columns. J Lipid Res. 1985, 26: 135-140.

    CAS  Google Scholar 

  30. Christie WW: Lipid analyses. In. 1982, 93-106. 2

    Google Scholar 

  31. Yu C, Chen Y, Cline GW, Zhang D, Zong H, Wang Y, Bergeron R, Kim JK, Cushman SW, Cooney GJ, Atcheson B, White MF, Kraegen EW, Shulman GI: Mechanism by which fatty acids inhibit insulin activation of insulin receptor substrate-1 (IRS-1)-associated phosphatidylinositol 3-kinase activity in muscle. J Biol Chem. 2002, 277: 50230-50236. 10.1074/jbc.M200958200.

    Article  CAS  Google Scholar 

  32. Itani SI, Ruderman NB, Schmieder F, Boden G: Lipid-induced insulin resistance in human muscle is associated with changes in diacylglycerol, protein kinase C, and IkappaB-alpha. Diabetes. 2002, 51: 2005-2011.

    Article  CAS  Google Scholar 

  33. Avignon A, Yamada K, Zhou X, Spencer B, Cardona O, Saba-Siddique S, Galloway L, Standaert ML, Farese RV: Chronic activation of protein kinase C in soleus muscles and other tissues of insulin-resistant type II diabetic Goto-Kakizaki (GK), obese/aged, and obese/Zucker rats. A mechanism for inhibiting glycogen synthesis. Diabetes. 1996, 45: 1396-1404.

    Article  CAS  Google Scholar 

  34. Griffin ME, Marcucci MJ, Cline GW, Bell K, Barucci N, Lee D, Goodyear LJ, Kraegen EW, White MF, Shulman GI: Free fatty acid-induced insulin resistance is associated with activation of protein kinase C theta and alterations in the insulin signaling cascade. Diabetes. 1999, 48: 1270-1274.

    Article  CAS  Google Scholar 

  35. Marignani PA, Epand RM, Sebaldt RJ: Acyl chain dependence of diacylglycerol activation of protein kinase C activity in vitro. Biochem Biophys Res Commun. 1996, 225: 469-473. 10.1006/bbrc.1996.1196.

    Article  CAS  Google Scholar 

  36. Madani S, Hichami A, Legrand A, Belleville J, Khan NA: Implication of acyl chain of diacylglycerols in activation of different isoforms of protein kinase C. Faseb J. 2001, 15: 2595-2601. 10.1096/fj.01-0753int.

    Article  CAS  Google Scholar 

Download references

Acknowledgments

The authors are grateful to Dr. K. Acheson and D. M. Mutch (Nestlé Research Center, Lausanne, Switzerland) for critically reading the manuscript.

Author information

Authors and Affiliations

  1. Nestlé Research Center, P.O. Box 44, Vers-Chez-Les-Blanc, 1000, Lausanne 26, Switzerland

    Christian Darimont, Marco Turini, Micheline Epitaux, Irène Zbinden, Myriam Richelle & Katherine Macé

  2. Department de Bioquimica i Biologia Molecular, Universitat de Barcelona, Barcelona, Spain

    Eulàlia Montell & Andreu Ferrer-Martinez

Authors
  1. Christian Darimont
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Marco Turini
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Micheline Epitaux
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Irène Zbinden
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Myriam Richelle
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Eulàlia Montell
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Andreu Ferrer-Martinez
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. Katherine Macé
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Katherine Macé.

Authors’ original submitted files for images

Below are the links to the authors’ original submitted files for images.

Authors’ original file for figure 1

Authors’ original file for figure 2

Authors’ original file for figure 3

Rights and permissions

Reprints and permissions

About this article

Cite this article

Darimont, C., Turini, M., Epitaux, M. et al. β3-adrenoceptor agonist prevents alterations of muscle diacylglycerol and adipose tissue phospholipids induced by a cafeteria diet. Nutr Metab (Lond) 1, 4 (2004). https://doi.org/10.1186/1743-7075-1-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1186/1743-7075-1-4

Keywords

Nutrition & Metabolism

ISSN: 1743-7075

Contact us