Effect of genistein with carnitine administration on lipid parameters and obesity in C57Bl/6J mice fed a high-fat diet.
Soy products are mainly composed of proteins, phytochemicals such as isoflavones, soy lipids, and carbohydrates. It is unclear whether an individual component alone or a combined effect of multiple bioactive compounds contributes to the beneficial properties of soy. We investigated the effect of dietary genistein (the principal soy isoflavone) alone and combined with L-carnitine to evaluate possible synergistic effects on the intentionally induced prediabetic state characterized by insulin resistance and obesity in C57Bl/6J mice fed a high-fat diet (HD). In the HD-alone group, abdominal and back fat relative to total body weight were significantly higher compared with other groups including those fed normal diet (ND). Among the HD groups, final weight gains of the HD plus genistein (HD+G) and HD plus genistein plus L-carnitine (HD+G+C) groups were lower compared with that of the control (HD-alone). Especially in liver, the results showed that genistein with carnitine transcriptionally up-regulated expressions of acyl-coenzyme A synthetase (ACS) and carnitine palmitoyltransferase-I (CPT-I) by approximately 50% and 40%, respectively, compared with genistein alone. However, the up-regulation of CPT-I did not directly reflect the enzyme activity of CPT-I. On the other hand, the effects of genistein and genistein with carnitine on the expressions of ACS and CPT-I in muscle were not significant. Our study suggests that genistein with carnitine exerts anti-obesity effects, probably by modulating peroxisome proliferator-activated receptor-associated genes. However, further work is needed to elucidate the possible mechanisms by which genistein and carnitine intervene.
Yang
Ji-Yeon
JY
Research Center of Bioactive Materials, Chonbuk National University, Jeonju, Jeonbuk, Republic of Korea.
Lee
Sang-Jun
SJ
Park
Hyun-Woo
HW
Cha
Youn-Soo
YS
D000273:Adipose Tissue / Q000033:anatomy & histology / Q000201:enzymology; D000818:Animals; D002331:Carnitine / Q000008:administration & dosage* / Q000097:blood; D002334:Carnitine O-Palmitoyltransferase / Q000235:genetics / Q000378:metabolism; D003066:Coenzyme A Ligases / Q000235:genetics; D004032:Diet; D004041:Dietary Fats / Q000008:administration & dosage*; D004357:Drug Synergism; D064429:Fatty Acid Synthases / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D019833:Genistein / Q000008:administration & dosage*; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000235:genetics / Q000378:metabolism; D007333:Insulin Resistance; D020738:Leptin / Q000097:blood; D008055:Lipids / Q000097:blood*; D008099:Liver / Q000201:enzymology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018482:Muscle, Skeletal / Q000201:enzymology; D009765:Obesity / Q000201:enzymology / Q000517:prevention & control*; D012333:RNA, Messenger / Q000032:analysis; D011897:Random Allocation; D015430:Weight Gain
D004041:Dietary Fats; D020738:Leptin; D008055:Lipids; D012333:RNA, Messenger; D019833:Genistein; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D002334:Carnitine O-Palmitoyltransferase; D064429:Fatty Acid Synthases; D003066:Coenzyme A Ligases; D002331:Carnitine