IL6 and obesity due to melanocortin 4 receptor deficiency: Preliminary results from our laboratory have recently identified a number of interactions between three IL-6 SNPs (IL-6 –174 G > C, IVS3 +281 G > T, and IVS4 +869 A > G) and dietary fatty acids on obesity and serum lipid levels in both black and white SA women [98] (Table 3).