Molecular analysis of gut microbiota in obesity among Indian individuals
Deepak P Patil Dhiraj P Dhotre Sachin G Chavan Armiya Sultan Dhawal S Jain Vikram B Lanjekar Jayshree Gangawani Poonam S Shah Jayshree S Todkar Shashank Shah Dilip R Ranade Milind S Patole Yogesh S Shouche
Obesity is a consequence of a complex interplay between the host genome and the prevalent obesogenic factors among the modern communities. The role of gut microbiota in the pathogenesis of the disorder was recently discovered; however, 16S-rRNA-based surveys revealed compelling but community-specific data. Considering this, despite unique diets, dietary habits and an uprising trend in obesity, the Indian counterparts are poorly studied. Here, we report a comparative analysis and quantification of dominant gut microbiota of lean, normal, obese and surgically treated obese individuals of Indian origin. Representative gut microbial diversity was assessed by sequencing fecal 16S rRNA libraries for each group (n=5) with a total of over 3000 sequences. We detected no evident trend in the distribution of the predominant bacterial phyla, Bacteroidetes and Firmicutes. At the genus level, the bacteria of genus Bacteroides were prominent among the obese individuals, which was further confirmed by qPCR (𝑃 > 0.05). In addition, a remarkably high archaeal density with elevated fecal SCFA levels was also noted in the obese group. On the contrary, the treated-obese individuals exhibited comparatively reduced Bacteroides and archaeal counts along with reduced fecal SCFAs. In conclusion, the study successfully identified a representative microbial diversity in the Indian subjects and demonstrated the prominence of certain bacterial groups in obese individuals; nevertheless, further studies are essential to understand their role in obesity.
Deepak P Patil1 2 Dhiraj P Dhotre1 Sachin G Chavan1 Armiya Sultan1 Dhawal S Jain3 Vikram B Lanjekar4 Jayshree Gangawani5 Poonam S Shah5 Jayshree S Todkar5 Shashank Shah5 Dilip R Ranade4 Milind S Patole1 Yogesh S Shouche1