【摘要】 目的　研究先天性少指缺掌并足裂畸形一家系患者的临床表现及其致病原因。方法　在患者家系调查的基础上 ,设立正常对照组与患者组 ,应用聚合酶链反应技术对两组的 P6 3基因第 5～ 8外显子基因组 DNA测序分析。结果　体检发现 ,患者双上肢少拇指、食指和中指 ,缺桡侧手掌并双下肢足裂畸形。病因研究提示 ,P6 3基因第 5～ 8外显子 PCR扩增片段大小分别为 2 84 bp、2 5 9bp、2 4 5 bp和 2 5 9bp。患者与正常对照的扩增片段大小一致。但将患者扩增的片段 DNA序列分别与正常对照组以及人类基因库P6 3基因 DNA序列进行比较时则发现于 P6 3基因第 5外显子的第 6 6 5位碱基对出现突变 ,即由 G突变为A。结论　先天性少指缺掌并足裂家系患者系由 P6 3基因第 5外显子基因组的第 6 6 5位碱基对突变所致。更多还原

【Abstract】 Objective The paper is a study on the clinical symptoms and pathogeny of ectrodactyly and absence of radius side part palm and split foot malformation of some patients in one family. Methods Based on the patient family investigation,a normal control group and a patient group were established. Then, polymerase chain reaction technique was used for DNA sequencing and analysis of the two groups for their exons 5-8 gene group DNA of P63 gene. Results The medical examination found that the patients’ upper bilateral limbs are short of thumbs, forefingers and middle fingers, and have radius side part palm and double lower limbs foot clefts malformation. The pathogeny research revealed that the PCR expansion pieces of the exons 5-8 of P63 are 284 bp, 259 bp, 245 bp and 259 bp respectively, and the size of the expansion piece of the patients was the same as that of the normal people group. However, a respective comparison between the DNA serial of the expansion piece of the patient and that of the normal people group and that of the P63 gene in the human gene bank showed that mutation occurs at the number 665 base pair of exon 5 of P63, namely a mutation from G to A. Conclusion The ectrodactyly, absence of radius side part palm and split foot malformation are caused by the mutation of base pair at number 665 of the exon 5 of P63.更多还原