摘要
Charcot-Marie-Tooth（CMT） disease is a common neurogenetic disorder and its heterogeneity is a challenge for genetic diagnostics. The genetic diagnostic procedures for a CMT patient can be explored according to the electrophysiological criteria： very slow motor nerve conduction velocity（MNCV）（〈15 m/s）, slow MNCV（15–25 m/s）, intermediate MNCV（25–45 m/s）, and normal MNCV（〉45 m/s）. Based on the inheritance pattern, intermediate CMT can be divided into dominant（DI-CMT） and recessive types（RI-CMT）. GJB1 is currently considered to be associated with X-linked DI-CMT, and MPZ, INF2, DNM2, YARS, GNB4, NEFL, and MFN2 are associated with autosomal DI-CMT. Moreover, GDAP1, KARS, and PLEKHG5 are associated with RI-CMT. Identification of these genes is not only important for patients and families but also provides new information about pathogenesis. It is hoped that this review will lead to a better understanding of intermediate CMT and provide a detailed diagnostic procedure for intermediate CMT.
Charcot-Marie-Tooth（CMT） disease is a common neurogenetic disorder and its heterogeneity is a challenge for genetic diagnostics. The genetic diagnostic procedures for a CMT patient can be explored according to the electrophysiological criteria： very slow motor nerve conduction velocity（MNCV）（〈15 m/s）, slow MNCV（15–25 m/s）, intermediate MNCV（25–45 m/s）, and normal MNCV（〉45 m/s）. Based on the inheritance pattern, intermediate CMT can be divided into dominant（DI-CMT） and recessive types（RI-CMT）. GJB1 is currently considered to be associated with X-linked DI-CMT, and MPZ, INF2, DNM2, YARS, GNB4, NEFL, and MFN2 are associated with autosomal DI-CMT. Moreover, GDAP1, KARS, and PLEKHG5 are associated with RI-CMT. Identification of these genes is not only important for patients and families but also provides new information about pathogenesis. It is hoped that this review will lead to a better understanding of intermediate CMT and provide a detailed diagnostic procedure for intermediate CMT.
