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Case Reports
. 2004 Apr 15;13(8):799-805.
doi: 10.1093/hmg/ddh096. Epub 2004 Feb 19.

A mutation in the nerve growth factor beta gene (NGFB) causes loss of pain perception

Elisabet Einarsdottir  1 , Anna Carlsson, Jan Minde, Göran Toolanen, Olle Svensson, Göran Solders, Gösta Holmgren, Dan Holmberg, Monica Holmberg
Affiliations
Case Reports

A mutation in the nerve growth factor beta gene (NGFB) causes loss of pain perception

Elisabet Einarsdottir et al. Hum Mol Genet. .

Abstract

Identification of genes associated with pain insensitivity syndromes can increase the understanding of the pathways involved in pain and contribute to the understanding of how sensory pathways relate to other neurological functions. In this report we describe the mapping and identification of the gene responsible for loss of deep pain perception in a large family from northern Sweden. The loss of pain perception in this family is characterized by impairment in the sensing of deep pain and temperature but with normal mental abilities and with most other neurological responses intact. A severe reduction of unmyelinated nerve fibers and a moderate loss of thin myelinated nerve fibers are observed in the patients. Thus the cases in this study fall into the class of patients with loss of pain perception with underlying peripheral neuropathy. Clinically they best fit into HSAN V. Using a model of recessive inheritance we identified an 8.3 Mb region on chromosome 1p11.2-p13.2 shared by the affected individuals in the family. Analysis of functional candidate genes in the disease critical region revealed a mutation in the coding region of the nerve growth-factor beta (NGFB) gene specific for the disease haplotype. This NGF mutation seems to separate the effects of NGF involved in development of central nervous system functions such as mental abilities, from those involved in peripheral pain pathways. This mutation could therefore potentially provide an important tool to study different roles of NGF, and of pain control.

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