Researchers have identified a genomic variant strongly associated with sensitivity to the sun, brown hair, blue eyes — and freckles. In the study of Icelanders the researchers uncovered an intricate pathway involving the interspersed DNA sequence, or non-coding region, of a gene that is among a few dozen that are associated with human pigmentation traits. The study by an international team including researchers from the National Institutes of Health was reported in the journal Cell .
Researchers Identify Genomic Variant Associated with Sun Sensitivity, Brown Hair, Blue Eyes and Freckles
Celiac disease is a genetic digestive disorder triggered by consumption of the protein gluten, which is found in bread, pasta, cookies, pizza crust and many other foods containing wheat, barley or rye. Researchers now report that there is a factor independent of diet that contributes to oxidative stress in celiac disease patients; children with celiac disease have higher than normal levels of two oxidative DNA damage biomarkers, regardless of what they eat .
Celiac disease is an autoimmune disease in which the consumption of gluten — a protein found in all forms of wheat, including spelt, kamut, semolina and triticale, as well as in barley and rye — induces an inflammatory reaction that destroys the gut. It occurs in almost 1% of the population, although in the United States as many as 97% of cases remain undiagnosed. Most autoimmune diseases are thought to be caused by an interaction between a genetic predisposition and an environmental trigger, but celiac disease is the only one for which the environmental trigger is known: gluten.