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Am J Med Genet A. 2010 Oct;152A(10):2437-43. doi: 10.1002/ajmg.a.33657.

De novo ACTA2 mutation causes a novel syndrome of multisystemic smooth muscle dysfunction.

Author information

1
Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77030, USA. dianna.m.miledwicz@uth.tmc.edu

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 α-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.

PMID:
20734336
PMCID:
PMC3573757
DOI:
10.1002/ajmg.a.33657
[Indexed for MEDLINE]
Free PMC Article

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