Indian Genetics: Why Western Medical Treatments Might Not Apply

A major study just dropped some serious implications about Indian genetics. It suggests that the medical treatments developed over in Europe and America might just not line up for Indian patients.

GenomeIndia , that big research project run by India’s top science bodies, looked at DNA from over 9,700 people across the country. The results, which are currently just a preprint on medRxiv—no peer review yet—point toward something crucial. Reliance on Western research for managing health just might not be fruitful anymore. It screams for India to start building its own guidelines for how we diagnose, prevent, and treat things.

The researchers were clear about the scope. They wanted to capture the whole mix: the anthropological stuff, the languages, the socio-cultural diversity of the subcontinent. They pulled samples from every major region and language group, including tribal communities and non-tribal ones too.

Mohammed Faruq, one of the scientists involved, talking to News18, said this initiative was huge. They sequenced the first ten thousand genomes in the country. He pointed out that nobody doubts the potential of these massive sequencing datasets to totally revolutionize healthcare, change how doctors practice.

What they found in those massive datasets? A huge set of novel findings surfaced from each group. New variations, hidden medical variations that actually matter… Tribal populations, they have a really unique genomic structure. Health parameters, what conditions people get, how drugs work—all of that needs to know the local genetic architecture.

The study involved a bunch of big players. Think AIIMS-J, GBRC in Ahmedabad, IISER-Pune, NIMHANS in Bengaluru, and IIT Jodhpur. Thirteen major institutions were involved in this effort.

And then there was the striking pattern. Certain Indian tribal communities carry genetic risks for specific diseases way higher than any other population studied globally. Things like sickle cell, or risks for metabolic and endocrine disorders.

Some isolated tribal groups inherited harmful genetic mutations at rates that outpace even the Ashkenazi Jewish or Finnish populations. Those groups are known for concentrated genetic disease, right?

The researchers noted that two of these tribal populations rank among the world’s highest in inherited genetic burden. The numbers were “greater than five-fold higher than Ashkenazi Jews and Finnish populations.”

They looked closer at the numbers. About 2,700 people in the study showed genetic signatures indicating high inherited risk for recessive diseases. Eighty percent of them came from six DR_T populations, one AA_T, and two IE_T populations.

DR_T, AA_T, and IE_T—these are the tribal communities, grouped by their language families: Dravidian, Austroasiatic, and Indo-European.

This is where the real punch hits. It means a lot of people in these communities might be facing serious health risks that doctors just aren't screening for.

The most important takeaway, honestly: the genetic risk factors found when studying European subjects often just don’t apply to Indians.

The researchers pointed out this divergence. Tribal groups like AA_T and DR_T, and the TB populations, show the biggest difference when compared to the gnomAD-EUR data. Non-tribal Indo-European and Dravidian groups show smaller shifts, less dramatic changes.

A genetic marker that predicts sickness in a European patient? It might mean something totally different, or have zero relevance, for an Indian patient.

They stressed the consequence of this gap. Eurocentric GWAS signals offer only partial insight into disease risk estimates in these populations.

Practically speaking, Indian doctors using European medical guidelines to assess genetic disease risk might be giving patients seriously wrong advice.

Then there’s the sheer volume of missing data. The study uncovered enormous numbers of genetic mutations in Indians that haven’t been properly documented in global medical databases.

They found about 1.5 million protein-coding variants in the Indian population. Many of these are completely missing from existing medical records. This means Indian doctors are missing the reference materials they need to diagnose and treat inherited genetic disorders in their own patients.

This is why the researchers are pushing for urgent action. They need population-informed genetic counseling. Carrier and newborn screening. Rare disease diagnostics. All of this needs to be part of national health initiatives if we want equitable precision medicine.

The overall message is clear: India needs to build its own genetic medicine framework. Stop just borrowing models from the West.