结直肠癌患者BRAF基因突变检测及其临床意义  被引量:8

The detection of BRAF mutations and its clinical significance in colorectal cancer patients

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作  者:沈胤晨 王建飞[1] 杨红鹰[2] 王方[2] 石远凯[1] 韩晓红[1] 

机构地区:[1]北京协和医学院中国医学科学院肿瘤医院肿瘤研究所内科实验室、抗肿瘤分子靶向药物临床研究北京市重点实验室,100021 [2]北京协和医学院病理科

出  处:《中华检验医学杂志》2012年第11期993-999,共7页Chinese Journal of Laboratory Medicine

基  金:国家高技术研究发展计划(863计划)资助项目(2011AA02A110);国家重大新药创制科技重大专项资助项目(2012ZX09303012);卫生部卫生公益性行业科研专项资助项目(200902002.1)

摘  要:目的探讨中国结直肠癌患者鼠类肉瘤病毒癌基因同源物B1(BRAF)基因突变与临床病理特征的关系及临床意义。方法采用直接测序法检测2009年12月至2011年12月中国医学科学院肿瘤医院手术切除的676例结直肠癌患者组织标本中BRAF15及BRAF11外显子基因突变,并分析其与患者临床病理特征的关联性。结果可有效检测的666例患者结直肠癌标本中的BRAF基因总突变率为4.35%(29/666),其中BRAF15(V600E)突变率为1.94%(13/669);BRAF11突变率为2.39%(16/670)。结合临床病理特征分析,BRAF15突变与肿瘤分化程度相关(5.81%比1.46%),其分化程度越低,突变率越高(r=0.105,P=0.040)。而突变率与患者年龄、性别、吸烟史、饮酒史、肿瘤原发部位、肿瘤形态、原发肿瘤分期(T分期/N分期)、肿瘤病理组织分型和是否有远处转移无相关性[r值分别为0.007、-0.018、-0.049、-0.023、-0.098、-0.038、0.040(0.034/0.059)、0.065、0.042,P均〉0.05]。在有、无饮酒史患者中BRAFll突变频率差异有统计学意义(6.02%比1.81%,r=0.093,P=0.035)。然而,其突变率与患者年龄、性别、吸烟史、肿瘤原发部位、肿瘤形态、肿瘤分化程度、原发肿瘤分期(N分期)、肿瘤病理组织分型和是否有远处转移无相关性[r值分别为-0.004、0.047、0.020、0.042、0.029、0.040、0.006(一0.008)、0.008、0.030,P均〉0.05]。结论我国结直肠癌患者BRAFl5突变率随着肿瘤分化程度的降低逐渐升高;BRAFl1在有饮酒史患者中突变率较高。Objective To determine the mutant status of BRAF gene in Chinese colorectal cancer (CRC) patients and analyze the association with elinicopathological parameters. Methods 676 CRC samples were collected in Cancer Institute/ Hospital, Chinese Academy of Medical Science from December 2009 to December 2011. The direct sequencing was conducted to detect mutations in the BRAF (exon 15 and exon 11 ). The correlation between mutant status with clinicopathological parameters were analyzed. Results Beside 10 colorectal cancer samples, among the 666 eoloreetal cancer patients 4. 35% (29/666) of the tumors harbored a BRAF mutation, of which 1.94% (13/669) in exon 15 (V600E) , 2. 39% (16/670) in exon 11. Statistical analysis revealed that BRAF15 mutations appeared to occur more frequently in poor- differentiation tumors than high or moderate-differentiation tumors (5.81% vs 1.46%, r = 0. 105, P =0. 040). But BRAF15 mutations were not correlated with age, gender, smoking and drinking history, tumor site, tumor type, tumor(T/N) staging, histological type, or distant metastasis [ r equals to O. 007, - 0. 018, - 0. 049, - 0. 023, - 0. 098, - 0. 038, 0. 040 (0. 034/0. 059 ), 0. 065, 0. 042, respectively, P 〉 0. 05 ] ; BRAF11 mutations appeared to occur more frequently in patients with drinking history (6. 02% vs 1.81% , r = O. 093, P = 0. 035 ). However, age, gender, smoking history, tumor site, tumor type, tumor differentiation, tumor(N) staging, histological type, or distant metastasis showed no significant correlation with this mutation [ r equals to -O. 004, O. 047, O. 020, O. 042, O. 029, O. 040, 0. 006 ( - O. 008 ), 0. 008, 0. 030, respectively, P 〉 0.051- Conclusion A higher proportion of BRAF15 (V60OE) mutations occurred in poor-differentiation tumors among the Chinese patients with CRC; BRAF11 mutations appeared more frequently in patients with drinking history.

关 键 词:结直肠肿瘤 原癌基因蛋白质B—raf 突变 

分 类 号:R735.3[医药卫生—肿瘤]

 

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