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hereditary sensory neuropathy, type II
Other data
LocusChr. 12 p13.33

Hereditary sensory neuropathy, type II also known as HSN2 is a protein which in humans in encoded by the HSN2.[1][2] It is a single-exon ORF, and a nervous system-specific exon of the WNK1 gene. HSN2 is as an alternatively spliced exon of WNK1 and this selectively occurs in nervous tissues, resulting in WNK1/HSN2 nervous system isoforms.[3]


The WNK1/HSN2 isoforms are expressed in the sensory parts of the peripheral nervous system and central nervous system which are associated with the transmission of sensory and nociceptive signals. These parts include satellite cells, Schwann cells, and sensory neurons. The novel protein product of the isoform is more plentiful in sensory neurons than motor neurons.[3] It is proposed that this gene product may play a role in the development and/or maintenance of peripheral sensory neurons or their supporting Schwann cells.

Clinical significance

Mutations in the HSN2 gene are associated with congenital sensory neuropathy (HSAN Type II), an autosomal recessive disorder characterized by impairment of pain, temperature, and touch sensation owing to reduction or absence of peripheral sensory neurons.[3]


  1. "Entrez Gene: Hereditary sensory neuropathy, type II".
  2. Lafreniere RG, MacDonald ML, Dube MP, MacFarlane J, O'Driscoll M, Brais B, Meilleur S, Brinkman RR, Dadivas O, Pape T, Platon C, Radomski C, Risler J, Thompson J, Guerra-Escobio AM, Davar G, Breakefield XO, Pimstone SN, Green R, Pryse-Phillips W, Goldberg YP, Younghusband HB, Hayden MR, Sherrington R, Rouleau GA, Samuels ME, Study of Canadian Genetic Isolates (May 2004). "Identification of a Novel Gene (HSN2) Causing Hereditary Sensory and Autonomic Neuropathy Type II through the Study of Canadian Genetic Isolates". American Journal of Human Genetics. 74 (5): 1064–73. doi:10.1086/420795. PMC 1181970. PMID 15060842.
  3. 3.0 3.1 3.2 Shekarabi M, Girard N, Rivière JB, et al. (July 2008). "Mutations in the nervous system–specific HSN2 exon of WNK1 cause hereditary sensory neuropathy type II". J Clin Invest. 118 (7): 2496–2505. doi:10.1172/JCI34088. PMC 2398735. PMID 18521183.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.