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For better health, gut bacteria of 15 tribes mapped by Indian scientists

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Guwahati: Among researchers across the globe, a group of Indian scientists mapped the gut bacteria of 15 ethnic tribes of the country to understand their role in health, enabling development of personalised medicines and designer diets to suit changing lifestyles.

The research published in the December 2015 edition of Nature Scientific Reports also highlights the resemblance of Gut Bacterial Profile (GBP) of these communities with the profiles of the Mongoloid population of Mongolia, involving 193 healthy individuals from tribes of Assam, Manipur, Sikkim and Telangana.

“Till now there was no such report on the GBP of the ethnic tribes of India. With the rapid economic development coupled with the modernization of lifestyle, the tribal population of India may eventually undergo alteration in GBP and it is important to know the profile of these microorganisms to prepare necessary strategies for action,” Mojibur R. Khan, group leader of the study, told reporters.

By charting out the profile, the puzzle of how diet, genes and geography shape GBP and how even minute changes in the milieu of microorganisms have a significant impact on human health, will decipher.

“It will also help us in designing personalized medication and nutritional standards,” said Khan, a scientist at Guwahati’s Institute of Advanced Study in Science and Technology (IASST).

Other collaborators in the Department of Biotechnology-funded project include Narayan C. Talukdar from Manipur’s Institute of Bioresources & Sustainable Development (IBSD) and Rupjyoti Talukdar from Hyderabad’s Asian Healthcare Foundation/Asian Institute of Gastroenterology, in addition to IASST.

In 2015, after a major chunk of research directed on the topics of gut bacteria and the human microbiome which are the red hot topics right now made it clear that they’re much more important than previously thought.

Practical applications like faecal transplant to fight life-threatening diseases became a reality.

While some of these microbes like the dry parts of the skin, others snuggle up in the warm confines of the mouth or the moist skin folds of underarms. It’s a symbiosis: humans offer them residence, they help us live.

But the major chunk of real estate for these bacteria, virus and fungi are the human gut.

Under impaired circumstances, a harmless organism can become a disease-causing one which may result in your overall health becoming topsy-turvy due to the erosion of a, particularly beneficial species. So, common practices like eating curd (or other probiotics) regularly ensure the gut gets its share of good bacteria to ease digestion.

Khan said that as many as 593 bacterial varieties were detected in the profiles and Sikkim tribes showed a “higher abundance” of probiotic bacterial varieties like Bifidobacteria and Lactobacillus as they consume more dairy products, including curd.

By intake of dairy products and studying their effects on health, a GBP can be altered and researchers have launched this study as an offshoot to the GBP mapping.

“When compared with the worldwide data on gut bacteria, the Indian tribal population had more similarity with the Mongoloid population of Mongolia. This means either the genetic similarity or the geographical settings have resulted in the particular food habits (such as fermented foods) and resulting gut bacterial profile,” said Khan of IASST’s Molecular Biology and Microbial Biotechnology Laboratory, Life Science Division.

Khan added, “Furthermore, most of these tribes prepare traditional rice beer using some herbs, which they consume regularly. This may also have some role in their health benefits as it is included in their custom and rituals. We have taken this as an intense area of research to understand the effect of rice beer on GBP and health.”(IANS)

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Bacteria in The Gut May Lead to Anxiety, Depression

The researchers are now working to identify specific populations of bacteria involved in these processes and the molecules that the bacteria produce

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Probiotics Not Effective in Reducing Anxiety: Study
Probiotics Not Effective in Reducing Anxiety: Study. Pixabay

Gut bacteria plays a key role in infusing negative feelings in the brains of obese people, causing depression and anxiety, researchers say.

The findings showed that mice on a high-fat diet showed significantly more signs of anxiety, depression and obsessive behaviour than animals on standard diets.

In mice with high-fat diets, two areas of the brain, the hypothalamus, which helps to control whole body metabolism, and the nucleus accumbens, important in mood and behaviour, becomes insulin resistant.

“Your diet isn’t always necessarily just making your blood sugar higher or lower; it’s also changing a lot of signals coming from gut microbes and these signals make it all the way to the brain,” said C. Ronald Kahn, from the Joslin Diabetes Centre in the US.

“But all of these behaviours are reversed or improved when antibiotics that will change the gut microbiome were given with the high fat diet,” Kahn added.

Gut Bacteria.
Gut Bacteria. Pixabay

In the study, published in the journal Molecular Psychiatry, the team identified the effect of the microbiome by transferring gut bacteria from experimental mice to germ-free mice which did not have any bacteria of their own.

The animals which received bacteria from mice on a high-fat diet began to show increased levels of activity associated with anxiety and obsessive behaviour.

However, those who got microbes from mice on a high-fat diet plus antibiotics did not, even though they did not receive the antibiotics themselves.

Also Read: Depression, Anxiety May Lead to Teeth Loss

The researchers are now working to identify specific populations of bacteria involved in these processes and the molecules that the bacteria produce.

“If we could modify those bacteria, either by putting in more beneficial bacteria or reducing the number of harmful bacteria, that might be a way to see improved behaviour,” Kahn noted. (IANS)