What Causes Familial Visceral Myopathy?

A heterozygous variant in enteric smooth muscle actin γ-2 (ACTG2) can cause familial visceral myopathy (FVM), according to the December issue of Gastroenterology. The altered gene product appears to aggregate, rather than form actin filaments, in intestinal smooth muscle cells, disrupting their contraction and reducing bowel motility. FVM is a rare

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