"These findings are highly relevant to the obesity pandemic in the United States and many other countries," said geneticist Brendan J. Keating, D. Phil., of the Center for Applied Genomics at The Children's Hospital of Philadelphia. "Of course, much research remains to be performed to discover further genes involved in these complex metabolic diseases, and to better understand how to improve treatments."

Keating, who previously helped create a large gene-discovery tool called the Cardio Chip, was a co-leader of both studies, which drew on large international teams of scientists using DNA, laboratory and disease data from tens of thousands of people.