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Fetal akinesia: review of the genetics of the neuromuscular causes - PubMed

Review

. 2011 Dec;48(12):793-801.

doi: 10.1136/jmedgenet-2011-100211. Epub 2011 Oct 7.

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Review

Fetal akinesia: review of the genetics of the neuromuscular causes

Gianina Ravenscroft et al. J Med Genet. 2011 Dec.

Abstract

Fetal akinesia refers to a broad spectrum of disorders in which the unifying feature is a reduction or lack of fetal movement. Fetal akinesias may be caused by defects at any point along the motor system pathway including the central and peripheral nervous system, the neuromuscular junction and the muscle, as well as by restrictive dermopathy or external restriction of the fetus in utero. The fetal akinesias are clinically and genetically heterogeneous, with causative mutations identified to date in a large number of genes encoding disparate parts of the motor system. However, for most patients, the molecular cause remains unidentified. One reason for this is because the tools are only now becoming available to efficiently and affordably identify mutations in a large panel of disease genes. Next-generation sequencing offers the promise, if sufficient cohorts of patients can be assembled, to identify the majority of the remaining genes on a research basis and facilitate efficient clinical molecular diagnosis. The benefits of identifying the causative mutation(s) for each individual patient or family include accurate genetic counselling and the options of prenatal diagnosis or preimplantation genetic diagnosis. In this review, we summarise known single-gene disorders affecting the spinal cord, peripheral nerves, neuromuscular junction or skeletal muscles that result in fetal akinesia. This audit of these known molecular and pathophysiological mechanisms involved in fetal akinesia provides a basis for improved molecular diagnosis and completing disease gene discovery.

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