A role for actin polymerization in persistent pulmonary hypertension of the newborn.

Abstract:

:Persistent pulmonary hypertension of the newborn (PPHN) is defined as the failure of normal pulmonary vascular relaxation at birth. Hypoxia is known to impede postnatal disassembly of the actin cytoskeleton in pulmonary arterial myocytes, resulting in elevation of smooth muscle α-actin and γ-actin content in elastic and resistance pulmonary arteries in PPHN compared with age-matched controls. This review examines the original histological characterization of PPHN with attention to cytoskeletal structural remodeling and actin isoform abundance, reviews the existing evidence for understanding the biophysical and biochemical forces at play during neonatal circulatory transition, and specifically addresses the role of the cortical actin architecture, primarily identified as γ-actin, in the transduction of mechanical force in the hypoxic PPHN pulmonary circuit.

authors

Fediuk J,Dakshinamurti S

doi

10.1139/cjpp-2014-0413

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

185-94

issue

3

eissn

0008-4212

issn

1205-7541

journal_volume

93

pub_type

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