De novo ACTA2 mutation causes a novel syndrome of multisystemic smooth muscle dysfunction.
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Milewicz DM, Ostergaard JR, Ala-Kokko LM, Khan N, Grange DK, Mendoza-Londono R, Bradley TJ, Olney AH, Ades L, Maher JF, Guo D, Buja LM, Kim D, Hyland JC, Regalado ES
De novo ACTA2 mutation causes a novel syndrome of multisystemic smooth muscle dysfunction.
Am J Med Genet A. 2010 Oct;152A(10):2437-43. doi: 10.1002/ajmg.a.33657.
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- 20734336 [ View in PubMed]
- Abstract
Smooth muscle cells (SMCs) contract to perform many physiological functions, including regulation of blood flow and pressure in arteries, contraction of the pupils, peristalsis of the gut, and voiding of the bladder. SMC lineage in these organs is characterized by cellular expression of the SMC isoform of alpha-actin, encoded by the ACTA2 gene. We report here on a unique and de novo mutation in ACTA2, R179H, that causes a syndrome characterized by dysfunction of SMCs throughout the body, leading to aortic and cerebrovascular disease, fixed dilated pupils, hypotonic bladder, malrotation, and hypoperistalsis of the gut and pulmonary hypertension.