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Modulated by Methylation

Researchers from Johns Hopkins University School of Medicine report in Nature Biotechnology that DNA methylation could mediate genetic risk of rheumatoid arthritis. As our sister publication GenomeWeb Daily News reports, the researchers profiled cytosine methylation marks, particularly focusing on CpG sites, in blood samples from about 350 rheumatoid arthritis cases and controls. The nine of their top 10 differentially methylated positions fell in MHC regions. And four CpG sites "showed an association between genotype and variance of methylation," the researchers write.

Johns Hopkins' Andrew Feinberg, the senior author of the paper, tells The New York Times that such epigenetic studies do not discount genetic susceptibility to disease. "Instead, it complements them," he says. "It is another arrow in the quiver."

The Scan

Call to Look Again

More than a dozen researchers penned a letter in Science saying a previous investigation into the origin of SARS-CoV-2 did not give theories equal consideration.

Not Always Trusted

In a new poll, slightly more than half of US adults have a great deal or quite a lot of trust in the Centers for Disease Control and Prevention, the Hill reports.

Identified Decades Later

A genetic genealogy approach has identified "Christy Crystal Creek," the New York Times reports.

Science Papers Report on Splicing Enhancer, Point of Care Test for Sexual Transmitted Disease

In Science this week: a novel RNA structural element that acts as a splicing enhancer, and more.