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Researchers complete a milestone in defining the genetic basis of rheumatoid arthritis
Date:12/25/2013

MANHASSET, NY An international group of investigators has discovered new genes, pathways and cell types that are involved in inherited susceptibility to rheumatoid arthritis (RA). The findings are published online in Nature.

Scientists performed a genome-wide association study (GWAS) meta-analysis in more than 100,000 people of European and Asian descent. They discovered 42 new sites of genetic variation involved in risk for RA. The analysis provides specific locations of genes, DNA sequences or positions on chromosomes for these genetic differences, bringing the catalog of confirmed risk variants for RA to over 100 genetic loci. These findings lead to a better understanding of how new treatments could be developed.

"This study is the culmination of over a decade of work by an extraordinary group of collaborative scientists from around the world," said Peter K. Gregersen, a collaborator on the study, and head of the Robert S. Boas Center for Genomics and Human Genetics at the Feinstein Institute for Medical Research. "It provides us with a definitive list of the major common genetic variation involved in this disease, and points the way forward to develop new diagnostic and therapeutic approaches to this illness."

The lead investigator of the study, Robert Plenge, MD, PhD, director of Genetics and Genomics, Division of Rheumatology, Immunology and Allergy at Brigham and Women's Hospital added, "Our study provides a compelling link between human genetics in RA and approved therapies to treat RA. This leads to an intriguing question: can our new genetic discoveries lead to new therapies to treat or cure RA? Further, can a similar approach be used to develop therapies for other complex diseases such as lupus, diabetes and Alzheimer's disease?"

Rheumatoid arthritis is a long-term inflammatory disorder that may affect many tissues and organs, but principally attacks flexible joints. It can be a disabling and painful condition, which can lead to substantial loss of functioning and mobility if not adequately treated. The disease often leads to the destruction of cartilage and fusion of the joints. Rheumatoid arthritis can also produce inflammation in areas of the body including the lungs, membrane around the heart, and white of the eye.


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Contact: Emily Ng
eng3@nshs.edu
516-562-2670
North Shore-Long Island Jewish (LIJ) Health System
Source:Eurekalert  

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