AIM To investigate the relationship between the expression of p16 gene and the gastric carcinogenesis,depth of invasion and lymph node metastases, and to evaluate the deletion and mutation of exon 2 in p16 gene in gas...AIM To investigate the relationship between the expression of p16 gene and the gastric carcinogenesis,depth of invasion and lymph node metastases, and to evaluate the deletion and mutation of exon 2 in p16 gene in gastric carcinoma.METHODS The expression of P16 protein was examined by streptavidin-peroxidase conjugated method (S-P); the deletion and mutation of p16 gene were respectively examined by polymerase chain reaction (PCR) and polymerase chain reaction single-strand conformation polymorphism analysis (PCR-SSCP) in gastric carcinoma.RESULTS Expression of P16 protein was detected in 96.25% (77/80) of the normal gastric mucosa, in 92.00% (45/50) of the dysplastic gastric mucosa and in 47.54% (58/122) of the gastric carcinoma. The positive rate of P16 protein expression in gastric carcinoma was significantly lower than that in normal gastric mucosa and dysplastic gastric mucosa (P＜0.05). The positive rate of P16 protein expression in mucoid carcinoma 10.00% (1/ 10) was significantly lower than that in poorly differentiated carcinoma 51.22% ( 21/ 41 ),undifferentiated carcinoma 57.69% (15/26) and signet ring cell carcinoma 62.50% (10/ 16) (P＜0.05). The positive rate of p16 protein in 30 cases paired primary and lymph node metastatic gastric carcinoma: There was 46.67% (14/30) in primary gastric carcinoma, 16.67% (5/30) in lymph node metastatic gastric carcinoma. The positive rate of lymph node metastatic carcinoma was significantly lower than that of primary carcinoma (P＜0.05). There was of p16 gene mutation in exon 2, but 5 cases displayed deletion of p16 gene in exon 2 in the 25 primary gastric carcinomas.CONCLUSIONS The expression loss of P16 protein related to the gastric carcinogenesis, gastric carcinoma histopathological subtypes and lymph metastasis. The mutation of p16 gene in exon 2 may not be involved in gastric carcinogenesis. But the deletion of p16 gene in exon 2 may be involved in gastric carcinogenesis.展开更多
目的用耳聋基因芯片方法检测19113名新生儿是否存在中国人常见耳聋基因的异常。方法采集2013年6月-12月长治市辖区内出生的19113名新生儿足跟血并提取DNA,应用耳聋基因芯片检测4个常见耳聋基因的9个突变位点,包括GJB2(35 del G,176_191d...目的用耳聋基因芯片方法检测19113名新生儿是否存在中国人常见耳聋基因的异常。方法采集2013年6月-12月长治市辖区内出生的19113名新生儿足跟血并提取DNA,应用耳聋基因芯片检测4个常见耳聋基因的9个突变位点,包括GJB2(35 del G,176_191del 16,235 del C,299_300 del AT)、GJB3(538 C>T)、SLC26A4(IVS 7-2 A>G,2168 A>G)和线粒体DNA 12S r RNA(1555 A>G,1494 C>T)。同时对19113名新生儿的基本信息进行了调查,包括听力学检查。结果 19113名新生儿中,共检测出耳聋基因异常者984例(5.15%),其中GJB2基因杂合突变437例(2.29%),235de1C纯合突变2例(0.01%),线粒体DNA 12S r RNA突变66例(0.35%),SLC26A4基因杂合突变型395例(2.07%),GJB3基因杂合突变62例(0.32%),双杂合突变型22例(0.12%)。结论长治地区新生儿常见耳聋基因突变以GJB2基因突变、SLC26A4基因突变为主。基因突变率以城区、长治县和襄垣县居多,新生儿耳聋基因筛查可以对药物性耳聋、PDS综合征等听力筛查无法检测的迟发性耳聋进行检测。展开更多
基金the grant from the Teaching Committee of HunanProvince,No.97B095the"8th 5-year Plan"of Health Department of Hunan Province,No.9301
文摘AIM To investigate the relationship between the expression of p16 gene and the gastric carcinogenesis,depth of invasion and lymph node metastases, and to evaluate the deletion and mutation of exon 2 in p16 gene in gastric carcinoma.METHODS The expression of P16 protein was examined by streptavidin-peroxidase conjugated method (S-P); the deletion and mutation of p16 gene were respectively examined by polymerase chain reaction (PCR) and polymerase chain reaction single-strand conformation polymorphism analysis (PCR-SSCP) in gastric carcinoma.RESULTS Expression of P16 protein was detected in 96.25% (77/80) of the normal gastric mucosa, in 92.00% (45/50) of the dysplastic gastric mucosa and in 47.54% (58/122) of the gastric carcinoma. The positive rate of P16 protein expression in gastric carcinoma was significantly lower than that in normal gastric mucosa and dysplastic gastric mucosa (P＜0.05). The positive rate of P16 protein expression in mucoid carcinoma 10.00% (1/ 10) was significantly lower than that in poorly differentiated carcinoma 51.22% ( 21/ 41 ),undifferentiated carcinoma 57.69% (15/26) and signet ring cell carcinoma 62.50% (10/ 16) (P＜0.05). The positive rate of p16 protein in 30 cases paired primary and lymph node metastatic gastric carcinoma: There was 46.67% (14/30) in primary gastric carcinoma, 16.67% (5/30) in lymph node metastatic gastric carcinoma. The positive rate of lymph node metastatic carcinoma was significantly lower than that of primary carcinoma (P＜0.05). There was of p16 gene mutation in exon 2, but 5 cases displayed deletion of p16 gene in exon 2 in the 25 primary gastric carcinomas.CONCLUSIONS The expression loss of P16 protein related to the gastric carcinogenesis, gastric carcinoma histopathological subtypes and lymph metastasis. The mutation of p16 gene in exon 2 may not be involved in gastric carcinogenesis. But the deletion of p16 gene in exon 2 may be involved in gastric carcinogenesis.
文摘目的用耳聋基因芯片方法检测19113名新生儿是否存在中国人常见耳聋基因的异常。方法采集2013年6月-12月长治市辖区内出生的19113名新生儿足跟血并提取DNA,应用耳聋基因芯片检测4个常见耳聋基因的9个突变位点,包括GJB2(35 del G,176_191del 16,235 del C,299_300 del AT)、GJB3(538 C>T)、SLC26A4(IVS 7-2 A>G,2168 A>G)和线粒体DNA 12S r RNA(1555 A>G,1494 C>T)。同时对19113名新生儿的基本信息进行了调查,包括听力学检查。结果 19113名新生儿中,共检测出耳聋基因异常者984例(5.15%),其中GJB2基因杂合突变437例(2.29%),235de1C纯合突变2例(0.01%),线粒体DNA 12S r RNA突变66例(0.35%),SLC26A4基因杂合突变型395例(2.07%),GJB3基因杂合突变62例(0.32%),双杂合突变型22例(0.12%)。结论长治地区新生儿常见耳聋基因突变以GJB2基因突变、SLC26A4基因突变为主。基因突变率以城区、长治县和襄垣县居多,新生儿耳聋基因筛查可以对药物性耳聋、PDS综合征等听力筛查无法检测的迟发性耳聋进行检测。
