BACKGROUND CYP21A2 gene mutations may all cause reduction or loss of 21-hydroxylase activity,leading to development of congenital adrenal hyperplasia(CAH)with different clinical phenotypes.For families with CAH childr...BACKGROUND CYP21A2 gene mutations may all cause reduction or loss of 21-hydroxylase activity,leading to development of congenital adrenal hyperplasia(CAH)with different clinical phenotypes.For families with CAH children,genetic testing of the parents and genetic counseling are recommended to assess the risk of recurrence.CASE SUMMARY We report a case of CAH with a high suspicion before delivery.The risk of the child suffering from CAH during the pregnancy had been underestimated due to the deviation of genetic counseling and genetic testing results.Our report confirmed a CYP21A2 homozygous deletion in this case,CYP21A2 heterozygous deletion in the mother,and a rare 2+0 CYP21A2 deletion in the father.CONCLUSION It is important to analyze the distribution of CYP21A2 gene in the two alleles of parents of children with CAH.展开更多
目的建立一种先天性肾上腺皮质增生症21-羟化酶缺陷的快速基因检测方法。方法选择中国人群21-羟化酶缺乏症相关基因CYP21A2的突变热点Exon3 Del 8bp、Q318X、R356W、IVS2 A/C>G、I172N、P30L和V281L共7个位点进行巢式PCR。设计上述...目的建立一种先天性肾上腺皮质增生症21-羟化酶缺陷的快速基因检测方法。方法选择中国人群21-羟化酶缺乏症相关基因CYP21A2的突变热点Exon3 Del 8bp、Q318X、R356W、IVS2 A/C>G、I172N、P30L和V281L共7个位点进行巢式PCR。设计上述突变热点的单链延伸引物进行扩增,采用SNaPshot技术对上述7个突变热点进行一次性基因分型检测。结果建立了一套满足质量控制标准的CYP21A2基因快速检测的方法,5例阳性干血片标本患者SNaPshot技术和测序技术的结果完全吻合,有2例复合突变,3例纯合突变,显示SNaPshot技术高度的特异性和灵敏度。结论采用SNaPshot技术检测CYP21A2基因具有高通量、准确、对样本容受性高的特点,便于临床应用。展开更多
Objective To investigate the spectrum of CYP21A2gene mutation and the correlation between genotype and phenotype in patients with 21-hydroxylase deficiency in Tianjin and surrounding areas. Methods Genomic DNA was ext...Objective To investigate the spectrum of CYP21A2gene mutation and the correlation between genotype and phenotype in patients with 21-hydroxylase deficiency in Tianjin and surrounding areas. Methods Genomic DNA was extracted from the peripheral blood samples of the proband.展开更多
基金Supported by the Fundamental Research Funds of Health Commission of Sichuan Province,No.17ZD035.
文摘BACKGROUND CYP21A2 gene mutations may all cause reduction or loss of 21-hydroxylase activity,leading to development of congenital adrenal hyperplasia(CAH)with different clinical phenotypes.For families with CAH children,genetic testing of the parents and genetic counseling are recommended to assess the risk of recurrence.CASE SUMMARY We report a case of CAH with a high suspicion before delivery.The risk of the child suffering from CAH during the pregnancy had been underestimated due to the deviation of genetic counseling and genetic testing results.Our report confirmed a CYP21A2 homozygous deletion in this case,CYP21A2 heterozygous deletion in the mother,and a rare 2+0 CYP21A2 deletion in the father.CONCLUSION It is important to analyze the distribution of CYP21A2 gene in the two alleles of parents of children with CAH.
文摘目的建立一种先天性肾上腺皮质增生症21-羟化酶缺陷的快速基因检测方法。方法选择中国人群21-羟化酶缺乏症相关基因CYP21A2的突变热点Exon3 Del 8bp、Q318X、R356W、IVS2 A/C>G、I172N、P30L和V281L共7个位点进行巢式PCR。设计上述突变热点的单链延伸引物进行扩增,采用SNaPshot技术对上述7个突变热点进行一次性基因分型检测。结果建立了一套满足质量控制标准的CYP21A2基因快速检测的方法,5例阳性干血片标本患者SNaPshot技术和测序技术的结果完全吻合,有2例复合突变,3例纯合突变,显示SNaPshot技术高度的特异性和灵敏度。结论采用SNaPshot技术检测CYP21A2基因具有高通量、准确、对样本容受性高的特点,便于临床应用。
文摘Objective To investigate the spectrum of CYP21A2gene mutation and the correlation between genotype and phenotype in patients with 21-hydroxylase deficiency in Tianjin and surrounding areas. Methods Genomic DNA was extracted from the peripheral blood samples of the proband.
