We conclude that defects in HspB8-mediated autophagy are likely to contribute to dHMNII pathology and their detection in peripheral blood mononuclear cells could be a useful, accessible biomarker for the disease.
Recently, mutations in both the small heat shock protein 27 (HSP27 or HSPB1) and 22 (HSP22 or HSPB8) genes have been reported to cause autosomal dominant CMT with minimal sensory involvement (CMT 2F/CMT2L) and autosomal dominant distal hereditary motor neuropathy type II (dHMN II).
Two mutations (K141E, K141N) in the small heat shock protein (sHSP) HSP22 (HSPB8) are associated with the inherited peripheral motor neuron disorders distal hereditary motor neuropathy type II and axonal Charcot-Marie-Tooth disease type 2L.
In two pedigrees with distal hereditary motor neuropathy type II linked to chromosome 12q24.3, we identified the same mutation (K141N) in small heat-shock 22-kDa protein 8 (encoded by HSPB8; also called HSP22).
In two pedigrees with distal hereditary motor neuropathy type II linked to chromosome 12q24.3, we identified the same mutation (K141N) in small heat-shock 22-kDa protein 8 (encoded by HSPB8; also called HSP22).
Molecular genetic analysis in a Belgian family with distal hereditary motor neuropathy type II (distal HMN II), demonstrated significant linkage of markers located at chromosome 12q24.
Mutations in HSPB1 result in the development of a late-onset, distal hereditary motor neuropathy type II (dHMN) and axonal Charcot-Marie Tooth disease with sensory involvement (CMT2F).
Recently, mutations in both the small heat shock protein 27 (HSP27 or HSPB1) and 22 (HSP22 or HSPB8) genes have been reported to cause autosomal dominant CMT with minimal sensory involvement (CMT 2F/CMT2L) and autosomal dominant distal hereditary motor neuropathy type II (dHMN II).
Recently, mutations in both the small heat shock protein 27 (HSP27 or HSPB1) and 22 (HSP22 or HSPB8) genes have been reported to cause autosomal dominant CMT with minimal sensory involvement (CMT 2F/CMT2L) and autosomal dominant distal hereditary motor neuropathy type II (dHMN II).
Recently, mutations in both the small heat shock protein 27 (HSP27 or HSPB1) and 22 (HSP22 or HSPB8) genes have been reported to cause autosomal dominant CMT with minimal sensory involvement (CMT 2F/CMT2L) and autosomal dominant distal hereditary motor neuropathy type II (dHMN II).