Conclusion Plant and marine sources of n-3 PUFAs can modify serum leptin and adiponectin levels by increasing adiponectin and decreasing leptin levels in patients with type 2 diabetes .
Due to some limitations in this study , further studies are needed to reach a definitive conclusion about the effect of n-3 PUFAs on the levels of leptin and adiponectin in T2DM
Abstract Aim N-3 PUFAs can potentially influence levels of inflammatory and non-inflammatory adipokines .
Given the contradictory effects of n-3 PUFAs on serum levels of adipokines in type 2 diabetes , we conducted a systematic review and meta- analysis study of r and omized placebo-controlled clinical trials that examined the effects of n-3 PUFAs on serum levels of leptin and adiponectin in patients with type 2 diabetes .
Reduction of leptin gene expression by dietary polyunsaturated fatty acids.
Supplementation with n-3 polyunsaturated fatty acids ( PUFA ) for 6 weeks did not alter plasma leptin concentrations in male smokers . Changes in dietary intake of saturated fatty acids ( FA ) correlated positively , whereas changes in the intake of PUFA correlated negatively to changes in plasma leptin levels . A 3-week n-3 PUFA-enriched diet , as compared with a 3-week lard-enriched diet , induced lower plasma leptin concentration and reduced leptin mRNA expression in rat epididymal adipose tissue . In the human trophoblast cell line ( BeWo ) , n-3 PUFA had a dose- and time-dependent effect on leptin expression . One mM of eicosapentaenoic acid or docosahexaenoic acid ( DHA ) reduced leptin expression by 71 % and 78 % , respectively , as compared with control , after 72 h. There was no effect on expression of the signal transducing form of the leptin receptor . In BeWo cells transfected with the human leptin promoter , we found that n-3 PUFA reduced leptin promoter activity ; in contrast saturated and monounsaturated FA had no effect on leptin promoter activity . The transcription factors peroxysomal proliferator activated receptor gamma and sterol regulatory element binding protein-1 mRNAs were reduced after incubation with n-3 PUFA , whereas the expression of CCAAT/enhancer binding protein alpha was unchanged . DHA-reduced leptin expression was abolished in BeWo cells grown in cholesterol-free medium . In conclusion , n-3 FA decreased leptin gene expression both in vivo and in vitro . The direct effects of PUFA on leptin promoter activity indicate a specific regulatory action of FA on leptin expression
Conclusion Plant and marine sources of n-3 PUFAs can modify serum leptin and adiponectin levels by increasing adiponectin and decreasing leptin levels in patients with type 2 diabetes .
Due to some limitations in this study , further studies are needed to reach a definitive conclusion about the effect of n-3 PUFAs on the levels of leptin and adiponectin in T2DM
Abstract Aim N-3 PUFAs can potentially influence levels of inflammatory and non-inflammatory adipokines .
Given the contradictory effects of n-3 PUFAs on serum levels of adipokines in type 2 diabetes , we conducted a systematic review and meta- analysis study of r and omized placebo-controlled clinical trials that examined the effects of n-3 PUFAs on serum levels of leptin and adiponectin in patients with type 2 diabetes .