Antiobesity effect of polyphenolic compounds from molokheiya (Corchorus olitorius L.) leaves in LDL receptor-deficient mice.
BACKGROUND
Dietary supplementation with polyphenolic compounds is associated with reduced diet-induced obesity and metabolic disorders in humans. The antioxidative properties of polyphenolic compounds contribute to their antiobesity effect in animal experiments and human studies.


OBJECTIVE
The aim of the study was to investigate the antiobesity effect of polyphenolic compounds from molokheiya leaves in LDLR-/- mice fed high-fat diet and to elucidate the mechanism of this effect.


METHODS
Three groups of LDLR-/- mice were fed with a high-fat diet, supplemented with 0% (control), 1 or 3% molokheiya leaf powder (MLP). Gene expression in the liver associated with lipid and glucose metabolism was analyzed, and physical parameters and blood biochemistry were determined.


RESULTS
Compared to controls, mice body weight gain (P = 0.003), liver weight (P = 0.001) and liver triglyceride levels (P = 0.005) were significantly lower in the two MLP groups. Epididymal adipose tissue weight (P = 0.003) was reduced in the 3% MLP group. Liver tissue gene expression of gp91phox (NOX2), involved in oxidative stress, was significantly down-regulated (P = 0.005), and PPARα and CPT1A, related to the activation of β-oxidation, were significantly up-regulated (P = 0.025 and 0.006, respectively) in the 3% MLP group compared to the control group.


CONCLUSIONS
Our results demonstrate an antiobesity effect of polyphenolic compounds from molokheiya leaves and that this effect is associated with reduction in oxidative stress and enhancement of β-oxidation in the liver. Consumption of molokheiya leaves may be beneficial for preventing diet-induced obesity.
Wang
Li
L
Department of Environmental and Preventive Medicine, Shimane University School of Medicine, 89-1 Enya-cho, Izumo City, Shimane, Japan.
Yamasaki
Masayuki
M
Katsube
Takuya
T
Sun
Xufeng
X
Yamasaki
Yukikazu
Y
Shiwaku
Kuninori
K
D000273:Adipose Tissue / Q000187:drug effects; D000704:Analysis of Variance; D000818:Animals; D019440:Anti-Obesity Agents / Q000494:pharmacology*; D001835:Body Weight; D032381:Corchorus / Q000737:chemistry*; D015536:Down-Regulation; D005419:Flavonoids / Q000494:pharmacology*; D008099:Liver / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000235:genetics / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D000074662:NADPH Oxidase 2; D019255:NADPH Oxidases / Q000235:genetics / Q000378:metabolism; D009765:Obesity / Q000139:chemically induced / Q000188:drug therapy*; D018384:Oxidative Stress; D047493:PPAR alpha / Q000378:metabolism; D010636:Phenols / Q000494:pharmacology*; D010936:Plant Extracts / Q000378:metabolism / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D059808:Polyphenols; D011973:Receptors, LDL / Q000172:deficiency; D014280:Triglycerides / Q000097:blood; D015854:Up-Regulation; D015430:Weight Gain
D019440:Anti-Obesity Agents; D005419:Flavonoids; D008562:Membrane Glycoproteins; D047493:PPAR alpha; D010636:Phenols; D010936:Plant Extracts; D059808:Polyphenols; D011973:Receptors, LDL; D014280:Triglycerides; C488842:Cybb protein, mouse; D000074662:NADPH Oxidase 2; D019255:NADPH Oxidases