The Evolution And Functional Impact Of Human Deletion Variants Shared With Archaic Hominin Genomes

This groundbreaking study examined genetic material we share with our ancient relatives - Neandertals and Denisovans - who lived alongside early humans hundreds of thousands of years ago. Researchers focused on "deletion variants," which are sections of DNA that are missing compared to a reference genome. They found 427 of these genetic deletions that modern humans share with these ancient human relatives.

The most significant finding was that about 87% of these shared deletions are very ancient - meaning they existed before humans and Neandertals split into separate groups around 500,000 years ago. Only about 9% came from more recent interbreeding between humans and Neandertals. The researchers identified 17 particularly important deletions that affect protein-coding genes involved in crucial bodily functions.

These ancient genetic deletions influence several areas directly relevant to metabolic health and disease risk. Some affect how our bodies process internal and external compounds (metabolism), growth patterns, and immune system function. Notably, the study found connections to inflammatory conditions like Crohn's disease and psoriasis, which are increasingly understood to have metabolic components and can affect overall health and longevity.

This research helps explain why individuals respond differently to treatments, diets, and environmental factors. Understanding these ancient genetic variants may eventually help personalize medical care by identifying who might be at higher risk for certain metabolic or inflammatory conditions based on their inherited genetic deletions from our ancient human relatives.