The Journal of Practical Medicine ›› 2023, Vol. 39 ›› Issue (23): 3127-3131.doi: 10.3969/j.issn.1006-5725.2023.23.018

• New Technology and New Method • Previous Articles     Next Articles

PCR-based capillary electrophoresis(PCR/CE) for genetic detection of SMN 1 and SMN 2

Shaoying LI,Jianchun HE,Gengye ZHAO,Jiajia XIAN,Lingling HUANG,Wenzhi HE,Xiaoyan MA,Huimin ZHANG,Mincong ZHANG,Qing. LI()   

  1. Department of Obstetrics and Gynecology,Guangdong Provincial Key Laboratory of Major Obstetric Diseases,Experimental Department of Obstetrics and Gynecology Institute,the Third Affiliated Hospital of Guangzhou Medical University,Guangzhou 510150,China
  • Received:2023-05-12 Online:2023-12-10 Published:2024-01-08
  • Contact: Qing. LI E-mail:81292522@163.com

Abstract:

Objective To establish a PCR-based capillary electrophoresis (PCR/CE) to detect Survival Motor Neuron 1 (SMN1) and Survival Motor Neuron 2 (SMN2) genes and to evaluate its performance. Methods PCR/CE and Multiplex Ligation-dependent Probe Amplification (MLPA) for SMA gene diagnosis were used to blindly test the samples in sync. The performance of PCR/CE was assessed using MLPA results as the standard. Results A total of 336 samples were included in this study, consisting of 50 homozygous deletion types (14.9%), 65 heterozygous deletion types (19.3%), and 221 non-deletion types (65.8%). The results of PCR/CE for detecting SMN1 and SMN2 copy numbers (0, 1, 2, 3, ≥ 4) were in complete agreement with the results of the MLPA. Conclusions PCR/CE for gene testing related to SMA could accurately detect copy numbers of exon 7 and exon 8 of the SMN1 and SMN2 genes (0, 1, 2, 3, ≥ 4).

Key words: spinal muscular atrophy, SMN1 gene, SMN2 gene, gene diagnosis

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