Viktor Lukacs, Jayanti Mathur, Rong Mao, Pinar Bayrak-Toydemir, Melinda Procter, Stuart M. Cahalan, Helen J. Kim, Michael Bandell, Nicola Longo, Ronald W. Day, David A. Stevenson, Ardem Patapoutian, Bryan L. Krock
The Scripps Research Institute. Genomics Institute of the Novartis Research Foundation. ARUP Institute for Clinical and Experimental Pathology. University of Utah. Stanford University. Children’s Hospital of Philadelphia and University of Pennsylvania.
United States
Nature Communications
Nat Commun 2015; 6:
DOI: 10.1038/ncomms9329
Abstract
Piezo1 ion channels are mediators of mechanotransduction in several cell types including the vascular endothelium, renal tubular cells and erythrocytes. Gain-of-function mutations in PIEZO1 cause an autosomal dominant haemolytic anaemia in humans called dehydrated hereditary stomatocytosis. However, the phenotypic consequence of PIEZO1 loss of function in humans has not previously been documented. Here we discover a novel role of this channel in the lymphatic system. Through whole-exome sequencing, we identify biallelic mutations in PIEZO1 (a splicing variant leading to early truncation and a non-synonymous missense variant) in a pair of siblings affected with persistent lymphoedema caused by congenital lymphatic dysplasia. Analysis of patients’ erythrocytes as well as studies in a heterologous system reveal greatly attenuated PIEZO1 function in affected alleles. Our results delineate a novel clinical category of PIEZO1-associated hereditary lymphoedema.
Category
Pulmonary Lymphatic Disease
Genetic Factors Associated with Pulmonary Vascular Disease
Symptoms and Findings Associated with Pulmonary Vascular Disease
Age Focus: Pediatric Pulmonary Vascular Disease
Fresh or Filed Publication: Filed (PHiled). Greater than 1-2 years since publication
Article Access
Free PDF File or Full Text Article Available Through PubMed or DOI: Yes