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Table 1 Major subclasses of flavonoids with examples and studies on the effects of flavonoids on WAT browning

From: Flavonoids as inducers of white adipose tissue browning and thermogenesis: signalling pathways and molecular triggers

Compound

Source

In vivo/vitro

Dose/Duration

Effect

Ref.

Flavonol

 Quercetin

Onion-peel

C57BL/6 mice, 3 T3-L1 adipocytes

5 mg/g diet, 8 W 0-240 μM

AMPK/Sirt1/PGC-1α↑

[24]

 Quercetin

Onion peel

HFD-induced metabolic Syndrome

0.8 mg/g diet

Nrf2/HO-1↑, NF-kB↓, attenuated oxidative stress and inflammation

[25]

 Quercetin

Onion peel

HFD-fed mice

1 mg/g, 12 W

AMPK /Sirt1 pathway

[26]

 Quercetin (Q) and Resveratrol (RSV)

 

HFD-induced obese Rats

15 + 30 mg/kg 6 W

perirenal WAT and interscapular BAT UCP-1↑

[27]

 Quercetin

Onion peel

HFD-fed mice

1 mg/g, 12 W

sWAT browning and TG↓

[28]

 Quercetin

Onion peel

3 T3-L1 adipocytes

10, 50, and 100 μM

AMPK pathway, ERK1/2 and JNK phosphorylation

[29]

 Isorhamnetin

Metabolite of quercetin

3 T3-L1 adipocyte ob/ob mice

12.5 to 50 μM 10 mg/g, 4 W

PPARγ↓

[30]

 Quercetin-rich onion peel extract

Onion peel

3 T3-L1 adipocyte

1to 50 μg/ml

PPARγ and C/EBPα↓, aP2 and LPL↓

[31]

 Rutin

Mulberry

Db/Db and HFD-fed mice, C3H10T1/2 cells

1 mg/ml in water, 10 W10 μM

Sirt1/PGC-1α/Τfam↑

[19]

 Rutin

Mulberry

HFD-induced obesity C57BL/6 mice

50 mg/kg, 8 W

PGC-1α↑

[32]

Anthocyanins

 Cy-3-G

 

db/db mice

1 mg/ml in water, 16 W

UCP1, Sirt1 and PGC-1α, PPARα

[33]

 Cy-3-G

Mulberry

HFC-fed C57BL/6 J mice, C3H10T1/2 clone8 cells

200 mg/kg, 8 W 100, 200 μg/ml

PGC-1α, FGF21, eNAMPT

[34]

 Cy-3-G

 

3 T3-L1 adipocytes

20–100 μM

AMPK, cAMP-C/EBPβ↑

[35]

 Mulberry extract Cy-3-G

Mulberry

C3H10T1/2 MSCs

10 μg/ml

p38AMPK–PGC-1α-PRDM16

[36]

Flavan-3-ols

 Flavan-3-ol

Cocoa

ICR mice

10 mg/kg diet, 2 to 20 h

AMPK/ PGC-1α↑

[37]

 Flavan-3-ol fraction

Cocoa

C57BL/J mice

50 mg/g, 2 W

PGC-1α/UCP-1↑MCAD

[38]

 Flavan-3-ol fraction

Cocoa

HFD-fed Wistar rats

2 mg/g diet, 4 W

β-oxidation-related enzymes and UCP-1↑

[39]

 Catechins

Tea

HFD-fed SD rats

5 mg/g diet, 5 W

BAT and UCP1↑

[40]

 Theaflavins

Black tea

ICR mice

10 ml/kg, 2 to 20 h

AMPK/PGC-1α↑

[41]

 Oolong,blackandpu-erh

Tea

ICR mice

2 g/100 ml drink for 7 days

AMPK/UCP-1↑, PPARγ and C/EBPα↓

[42]

 Catechins

Green tea

HFD-fed SD rats,

100 mg/kg/d, 30 Days

PPARγ increased in sWAT and decreased in vWAT, PPARδ↑

[43]

 Green tea extract

Green tea

SD rats

50 mg/kg, 24 h

NA-cAMP axis

[44]

  (−)-epicatechin

Cacao

HFD-fed C57BL/6 mice, Human adipocytes

1 mg/g diet, 15days100nM

Mitochondrial biogenesis and fat browning

[45]

Flavones

 Chrysin

Flowers, honeycombs, and mushrooms

3 T3-L1 adipocytes

50 μM

AMPK/PGC-1α/UCP-1

[46]

 Luteolin

Pepper, celery, thyme, peppermint

HFD-fed C57BL/6 mice

0.1 mg/g diet, 12 W

AMPK/PGC-1α signaling↑

[20]

 Nobiletin

Citrus fruits

3 T3-L1 adipocytes and HIB1B brown adipocytes

100 μM

AMPK/PGC-1α and Sirt1

[47]

 Sudachitin

Sudachi

C57BL/6 and db/db mice

5 mg/kg, 4 and 12 weeks

Sirt1–PGC-1α

[48]

Flavanones

 G-hesperidin

Peel of fruits

Wistar rats

60 mg/ml in water

BAT-SNA↑, CASNA↓

[49]

 Naringenin

 

HFD-fed Ldlr(−/−) mice

10,30 mg/g, 4 W

PGC-1α/ PPARα

[50]

 Citrus aurantium flavonoids

Hesperidin, Naringenin, and Nobiletin

3 T3-L1 adipocytes

0, 10, or 50 μg/ml

Akt/PPARγ and C/EBPα↓

[51]

 Naringenin

 

Long-Evans hooded rats

0.03 to 0.12 mg/g, 6 W

PPARα↑

[52]

Isoflavones

 Isoflavones

Soy

Male SD rats

0.5 or 4 g/kg, 2 W

UCP, PPARα↑

[53]

 Isoflavones

Soy food products

Long-Evans rats

600 mg/g diet, 33, 55 or 75 days of age

BNP Y↑, Thyroid↑, leptin and insulin↓

[54]

 Genistein

Soyabeans

3 T3-L1 adipocytes

100 μM

C/EBPβ, PGC-1α, Sirt1↑

[55]

 Daidzein

Soy isoflavones

HFD-fed Rats

50 mg/kg, 2 W

PPARγ and SCD1↓

[56]

Flavonolignan

 Silibinin

Milk thistle

Human ACS

10 μM

Sirt1, PPARα, PGC-1α↑

[21]

Proanthocyanidins

 Proanthocyanidins

Fruits, berries, beans, nuts, cocoa and wine

Wistar rats fed with a cafeteria diet

25 and 50 mg/kg diet, 4 months

Sirt1 and PGC-1α↑

[57]

 Proanthocyanidin extracts

Chinese bayberry

HFD-fed obese SD rat

4, 26, 53%, 4 W

Sirt1, BMP4↑, C/EBP-α, PPAR-γ↓

[58]

 Proanthocyanidin

 

Wistar rats

250 mg/kg

PGC-1α↑

[59]

 Flavangenol

French martima pine bark

HFD-fed Wister rats

3 μg intraduodenal injection, 60 min

BAT-SNA↑

[60]

 Procyanidin

Cacao liquor

HFD-fed C57BL/6 mice

5, 20 mg/g diet, 13 W

AMPKα/GLUT4/ PGC-1α↑

[61]

Xanthohumol

 Xanthohumol-rich hop extrac

Humulus lupulus L

3 T3-L1 adipocytes

10, 25 μg/ml

PPAR-γ, C/EBPα, aP2↓

[62]

 Xanthohumol

Humulus lupulus L

3 T3-L1 adipocytes

0 to 100 μM

PPAR-γ, C/EBPα, aP2↓, apoptosis↑

[63]

 Matured Hop Bittering Components

 

HFD-fed C57BL/6 J mice Wistar rats

0 to 2 mg/kg, 9 W 2 or 10 mg/kg, 90 min

BAT-SNA, PGC-1α, PRDM16, PPARγ↑

[64]

Plant Extract Mixture

 Black soybean seed coat extract

Black soybean

Male C57BL/6 mice

0 to2 mg/g diet 14 weeks

UCP1↑in BAT and WAT; TNF-α and MCP-1↓.

[65]

 Extract of kumquat

Citrus fruits

HFD-fed C57BL/6 mice

10 mg/kg, 8 weeks, 3 months

PPARα↑

[66]

 Puerariae flower extract

Kudzu flower

HFD-fed C57BL/6 J mice

50 mg/kg, 13.55 mg/kg ISOF, 6 W

UCP1↑in BAT

[67]

 Olive Leaf Extract

Oleuropein

Human ASCs

0.27 and 0.37 mg/ml

Sirt1, PPARα, PGC-1α↑

[68]

 E. cava polyphenol extract

Brown alga Ecklonia cava

HFD-fed C57BL/6 mice

100, 500 mg/kg/day 12 W

AMPK, PGC-1α, Sirt1↑

[69]