New clues in the pathogenesis of skull and skin birth defects associated with BSS

Researchers at Mount Sinai School of Medicine in New York have found new clues in the pathogenesis of skull and skin birth defects associated with a rare genetic disorder, Beare-Stevenson cutis gyrata syndrome (BSS). Using a mouse model, investigators found that by inhibiting the protein p38, previously associated with cancer and certain autoimmune conditions, they were able to interrupt development of specific birth defects associated with it: craniosynostosis, or the premature fusion of certain bones of the skull, and acanthosis nigricans, a hyperpigmentation skin disorder that often makes the skin look dirty and rough.

"We urgently need to identify the molecular mechanisms underlying the development of these disorders so that we can design effective treatment and strategies," said Ethylin Wang Jabs, MD, the study's senior investigator and Professor of Genetics and Genomic Sciences, Developmental and Regenerative Biology, and Pediatrics at Mount Sinai School of Medicine. "What this opens up for the first time are potential targets for treatment."

Results from the study are published in the June 2012 Journal of Clinical Investigation.

Using a mouse model of Beare-Stevenson cutis gyrata syndrome, researchers found that there was an increase in intracellular signaling through p38. When Yingli Wang, DMD, PhD, used intraperitoneal injections of an inhibitor of p38 into the mouse in utero, the skull and skin defect improved. In a separate experiment, topical application to the skin of a p38 inhibitor helped the skin defect.