A collaborative team from the University of Vienna and Liège University Hospital Centre has identified a hereditary growth disorder in two individuals who lived more than 12,000 years ago in southern Italy. By merging paleogenomic techniques with modern clinical genetics, the researchers proved that even Ice‑Age peoples carried rare genetic conditions.
Re‑examining a Classic Upper‑Paleolithic Burial
The story began with the famous Grotta del Romito burial, uncovered in 1963. Two skeletons were found intertwined—one small, the other slightly taller—sparking decades of debate about their relationship and the cause of their short stature.
Genetic Evidence of a Mother‑Daughter Pair
Extracting DNA from the dense petrous part of each temporal bone, the team discovered that the two were first‑degree relatives, most likely mother and daughter. Both were female, a fact clarified only through the genetic data.
Spotting a Rare Bone‑Growth Mutation
In the younger skeleton, a homozygous mutation in the NPR2 gene was detected. This mutation is the hallmark of acromesomelic dysplasia, Maroteaux type—a very rare condition that produces severe short stature and dramatically shortened limbs. The older individual carried a single altered copy of the same gene, explaining her milder reduction in height.
Why This Discovery Matters
"Ancient DNA lets us pinpoint exact mutations in people who lived tens of thousands of years ago," explained Ron Pinhasi, co‑lead of the study. "It shows that rare genetic diseases are not a modern phenomenon; they have deep roots in human history."
Evidence of Social Care in the Ice Age
Despite the younger woman's serious skeletal limitations, she survived into adolescence or adulthood. Researchers infer that her community provided ongoing assistance—food, mobility aid, and protection—highlighting a sophisticated level of social support in prehistoric groups.
Key Takeaways
- DNA analysis confirmed a mother‑daughter relationship for two individuals buried together in Italy.
- The younger individual carried two copies of a mutation in the NPR2 gene, confirming acromesomelic dysplasia.
- The elder individual possessed one altered copy, accounting for her less severe short stature.
- The findings prove that rare genetic disorders existed in ancient populations and can now be traced with paleogenomics.
- The younger woman's survival suggests that Ice‑Age societies offered dedicated care to members with disabilities.