TGF-α基因TaqⅠ RFLPs与国人非综合征性唇腭裂关系的研究

目的　探讨国人非综合征性唇腭裂与转化生长因子 α(transforminggrowthfactoralpha ,TGF α)基因多态性的关系。方法　应用聚合酶链反应 限制性片段长度多态性核苷酸分型技术 ,以TaqⅠ限制性内切酶消化PCR扩增产物 ,对 10 7例非综合征性唇裂或唇腭裂 (nonsyndromiccleftlipwithorwithoutcleftpalate,NSCL P)患者、136例正常人的TGF α TaqⅠ等位基因进行分析。结果　NSCL P患者的C2等位基因频率与正常对照组明显增高 ,差异有显著性意义 (P <0 0 5 ) ;有家族史的患者的TGF α TaqⅠ基因型与无家族史患者比较 ,差异有显著性意义 (P <0 0 5 )。结论　TGF α基因多态性与国人的非综合征性唇腭裂的发生有关 ;有先天性唇腭裂家族史可能与TGF α TaqⅠ少见变异体相互关联。

The TGF-α gene TaqⅠ polymorphism and non-syndromic cleft lip with or without cleft palate

OBJECTIVE: To study the association of TGF-alpha gene Taq I polymorphism and nonsyndromic cleft lip with or without cleft palate (NSCL/P) in Chinese. METHODS: 107 patients with NSCL/P and 136 healthy controls were examined for TGF-alpha/Taq I genotypes. TGF-alpha/Taq I typing was carried out by digesting the locus specific polymerase chain reaction amplified products with alleles specific Taq I restriction enzyme (PCR-RELP). RESULTS: The C2 allele frequency of TGF-alpha/Taq I in patients with NSCL/P (16%) was significantly higher than that in healthy controls (8%). The C2 genotype frequency of TGF-alpha/Taq I in NSCL/P patients with positive family history (12.5%) was significantly higher than that in healthy controls. CONCLUSION: These findings demonstrate the role of TGF-alpha as a gene of major effects in the development of nonsyndromic cleft lip with or without cleft palate clefts in human. These findings suggest that a family history of clefting may correlate with the TGF-alpha Taq I rare variation.