The clinical significance of RAD51 G135C polymorphysm and p53 mutation in non-small cell lung cancer

目的 探讨RAD51基因G135C多态性与肺癌发病风险、病理特点及p53基因突变的相关性.方法 选择80例肺癌患者为病例组,40例非肿瘤肺疾病患者为对照组.以PCR-RFLP技术检测病例组和对照组的RAD51基因型,比较不同基因型与肺癌危险性以及肺癌病理特点的关系;并采用免疫组化法对病例组进行p53突变的检测.结果 (1)RAD51基因型G/G、G/C和C/C在病例组的分布频率分别为77.5%、15.0%和1.3%,在对照组的分布频率分别为92.5%、7.5%和0.与携带G/G的个体相比,携带RAD51变异基因型(G/C和C/C)的个体具有更高的患癌风险(P＜0.05);(2)RAD51基因型与肺癌的病理学类型及组织学分级无相关性;(3)RAD51 G135C基因型在不同p53基因突变状态肺癌中的分布频率差异无显著性(P＞0.05).结论 RAD51基因多态性与肺癌发病风险有关,携带RAD51变异基因型(G/C和C/C)的个体易患肺癌.     

RAD51基因G135C单核苷酸多态性及p53突变在肺癌中的意义

目的探讨RAD51基因G135C多态性与肺癌发病风险、病理特点及p53基因突变的相关性。方法选择80例肺癌患者为病例组,40例非肿瘤肺疾病患者为对照组。以PCR-RFLP技术检测病例组和对照组的RAD51基因型,比较不同基因型与肺癌危险性以及肺癌病理特点的关系;并采用免疫组化法对病例组进行p53突变的检测。结果 (1)RAD51基因型G/G、G/C和C/C在病例组的分布频率分别为77.5%、15.0%和1.3%,在对照组的分布频率分别为92.5%、7.5%和0。与携带G/G的个体相比,携带RAD51变异基因型(G/C和C/C)的个体具有更高的患癌风险(P<0.05);(2)RAD51基因型与肺癌的病理学类型及组织学分级无相关性;(3)RAD51 G135C基因型在不同p53基因突变状态肺癌中的分布频率差异无显著性(P>0.05)。结论 RAD51基因多态性与肺癌发病风险有关,携带RAD51变异基因型(G/C和C/C)的个体易患肺癌。     

MicroRNA 146a基因单核苷酸多态性与卵巢上皮性肿瘤易感性的研究

目的 分析microRNA 146a(miR-146a)基因单核苷酸多态(single nucleotide polymorphisms,SNPs)位点rs2910164(G/C)与卵巢上皮性肿瘤易感性的关系.方法 采用病例-对照研究方法,纳入卵巢上皮性肿瘤患者184例为病例组,无卵巢肿瘤病史的人群200例为对照组.使用基因测序方法确定miR-146a基因rs2910164 (G/C)位点的多态基因型,比较不同基因型在病例组和对照组中的分布情况,并对年龄、月经周期、产次、口服避孕药、家族病史因素进行分层研究.结果 在miR-146a基因多态位点rs2910164(G/C)处,病例组和对照组均有GG、GC和CC 3种基因型,且两组的基因型总体分布差异具有统计学意义(P=0.002).与CC基因型相比,GG和GC基因型携带者的卵巢上皮性肿瘤发病风险较低(OR=0.396,95％ CI=0.219～0.717,P=0.002;OR=0.502,95％ CI =0.308～0.818,P=0.006).分层分析显示,这种影响在年龄≤50岁、产次≤2、未口服避孕药、无家族病史的情况下差异显著,x2检验P值分别为:0.001、0.000、0.001、0.001.结论 miR-146a单核苷酸多态位点rs2910164(G/C)与卵巢上皮性肿瘤易感性相关.GG和GC基因型携带者患卵巢上皮性肿瘤的发病风险低于CC基因型携带者.     

NURR1基因多态性与帕金森病的关联研究

目的 了解NURR1基因多态性与四川地区散发性帕金森病之间的相关性.方法 采用病例-对照研究,应用聚合酶链反应、等位基因特异性、限制性片段长度多态性对四川地区汉族人群241例帕金森病患者和236名正常对照NURR1基冈启动子区的c.-2922(C)2-3及第6内含子的ⅣS6+18imG多态位点进行关联分析.结果 IVS6+18insG位点帕金森病组3G/3G,3G/2G,2G/2G基因型频率与对照组相比差异无统计学意义(X2=3.733,P=0.155).进一步按发病年龄分层后发现,50岁以前发病的帕金森病患者基因型频率与对照组之间差异有统计学意义(X2=6.545,P=0.038).发病年龄＜50岁的帕金森病组患者3G/2G基因型频率显著高于对照组(54.12%vs 38.14%),并且与其他两组基因型合并相比差异有统计学意义(X2=6.537,P=0.011;OR=1.913,95%CI:1.159～3.158).c.-2922(C)2-3位点帕金森病组与对照组相比3C/3C,3C/2C及2C/2C基因型频率差异无统计学意义(P=0.766).结论 本研究结果提示NURR1基因ⅣS6+18insG多态可能与本组人群早发性帕金森病的遗传易感性相关;未发现c.-2922(C)2-3位点多态性与本组人群帕金森病的遗传易感性相关.     

中国南方妇女AhR和ARNT基因多态性与子宫内膜异位症的相关性

目的 探讨中国南方汉族妇女芳香烃受体(arylhydrocarbon receptor,AhR)基因和芳香烃受体核转位子(arylhydroarbon nuclear translocator,ARNT)基因多态性与子宫内膜异位症的相关性.方法 收集经手术证实的431例子宫内膜异位症患者和499名对照人群外周血,采用高分辨率熔解曲线技术检测AhR及ARNT基因多态性.结果 病例组和对照组妇女AhR 1661G/A位点AA、AG、GG基因型频率分别为9.7%、44.6%、45.7%和12.0%、41.9%、46.1%,两组的基因频率差异无统计学意义(χ2=0.234,P=0.629);A和G等位基因频率为32.0%、68.0%和33.0%、67.0%,两组差异无统计学意义(χ2=0.189,P=0.664).病例组和对照组妇女ARNT 567G/C位点GG、GC、CC基因频率分别为13.5%、47.8%、38.7%和15.6%、51.7%、32.7%,两组差异无统计学意义(χ2=0.194,P=0.659);C、G等位基因频率为62.6%、37.4%和58.5%、41.5%,两组差异无统计学意义(χ2=3.30,P=0.07).2组间AhR1661G/A和ARNT 567G/C联合基因型频率分布差异亦无统计学意义(χ2=11.20,P=0.191).结论 中国南方妇女外周血AhR 1661G/A及ARNT 567G/C基因多态与子宫内膜异位症的发病无明显相关.     

VEGF基因多态性与子宫内膜异位症和子宫腺肌病遗传易感性研究

目的 探讨血管内皮生长因子(vascular endothelial growth factor,VEGF)基因启动子区-460C/T和-1154G/A单核苷酸多态性与子宫内膜异位症和子宫腺肌病发病风险的关系.方法 采用聚合酶链反应-限制性片段长度多态方法检测344例子宫内膜异位症患者(内异症组)和360名对照妇女(对照组)、174例子宫腺肌病患者(腺肌病组)和199名对照妇女(对照组)的VEGF基因2个多态性位点的基因型频率分布情况.结果 VEGF-460C/T多态的基因型和等位基因频率分布在两病例组与其对照组间差异均无统计学意义(P>0.05).在内异症组和对照组中,VEGF-1154G/A多态的AA、GA、GG 3种基因型频率分别是1.7%、28.8%、69.5%和5.8%、32.8%、61.4%,两组比较差异有统计学意义(P=0.006);G、A等位基因频率分别是83.9%、16.1%和77.8%、22.2%,两组比较差异有统计学意义(P=0.004);与GA+AA基因型相比,携带GG基因型明显增加内异症的发病风险(OR=1.43,95%CI:1.05～1.96).在腺肌病组和对照组中,VEGF-1154G/A多态的AA、GA、GG 3种基因型频率分别是2.9%、23.6%、73.6%和7.0%、34.2%、58.8%.两组比较差异有统计学意义(P=0.007);G、A等位基因频率分别是85.3%、14.7%和75.9%、24.1%,两组比较差异有统计学意义(P=0.001);与GA+AA基因型相比,携带GG基因型明显增加腺肌病的发病风险(OR=1.95,95%CI:1.26～3.03).结论 VEGF基因启动子区-1154G/A多态与子宫内膜异位症和子宫腺肌病的发病风险明显相关,携带GG基因型显著增加子宫内膜异位症和子宫腺肌病的发病风险.     

中国南方妇女AhR和ARNT基因多态性与子宫内膜异位症的相关性

目的 探讨中国南方汉族妇女芳香烃受体(arylhydrocarbon receptor,AhR)基因和芳香烃受体核转位子(arylhydroarbon nuclear translocator,ARNT)基因多态性与子宫内膜异位症的相关性.方法 收集经手术证实的431例子宫内膜异位症患者和499名对照人群外周血,采用高分辨率熔解曲线技术检测AhR及ARNT基因多态性.结果 病例组和对照组妇女AhR 1661G/A位点AA、AG、GG基因型频率分别为9.7%、44.6%、45.7%和12.0%、41.9%、46.1%,两组的基因频率差异无统计学意义(χ2=0.234,P=0.629);A和G等位基因频率为32.0%、68.0%和33.0%、67.0%,两组差异无统计学意义(χ2=0.189,P=0.664).病例组和对照组妇女ARNT 567G/C位点GG、GC、CC基因频率分别为13.5%、47.8%、38.7%和15.6%、51.7%、32.7%,两组差异无统计学意义(χ2=0.194,P=0.659);C、G等位基因频率为62.6%、37.4%和58.5%、41.5%,两组差异无统计学意义(χ2=3.30,P=0.07).2组间AhR1661G/A和ARNT 567G/C联合基因型频率分布差异亦无统计学意义(χ2=11.20,P=0.191).结论 中国南方妇女外周血AhR 1661G/A及ARNT 567G/C基因多态与子宫内膜异位症的发病无明显相关.     

新疆维吾尔族、汉族阿尔茨海默病LRP基因766C/T多态性关联分析

目的 探讨新疆地区维吾尔族、汉族低密度脂蛋白受体相关蛋白基因(low density lipoproteinreceptor-related protein gene,LRP)766C/T多态性与阿尔茨海默病(Alzheimer's disease AD)的关系.方法 对新疆地区维吾尔族、汉族≥50岁8284名人群进行AD流行病学调查,参照ADRDA-NINCDS的标准,选取AD患者209例与正常对照220名,应用聚合酶链反应-限制性片段长度多态技术检测LRP基因766C/T多态性,采用病例-对照的关联分析方法进行基因型和等位基因频率分析.结果 (1)新疆维吾尔族、汉族之间LRP基因的基因型和等位基因分布频率差异有统计学意义(P<0.05).(2)汉族病例组与对照组间基因型和等位基因频率分布差异有统计学意义(P<0.05).(3)在年龄≥65岁的病例组与对照组间基因型和等位基因频率分布差异有统计学意义(P<0.05),且此年龄组携带C等位基因的个体发生AD的危险性显著增加(OR=1.98,P<0.05).(4)在女性病例组中C/C基因型分布频率和C等位基因频率显著高于对照组(P<0.05),女性携带C等位基因的个体发生AD的危险性显著增加(OR=2.927,P<0.05).结论 新疆维吾尔族和汉族之间LRP,基因766C/T多态性存在差异,并发现在汉族、年龄≥65岁及女性人群中LRP基因766C/T多态性与AD的发病风险存在关联.     

中国人XRCC2基因多态性与食管癌、贲门癌遗传易感性的关联研究

目的探讨X-射线交错互补修复基因2(X-ray repair cross-complementing gene2,XRCC2)41657C/T、4234G/C单核苷酸多态性(single nucleotide polymorphism,SNP)与河北省磁县和涉县人群食管鳞状细胞癌(esophageal squamous cell carcinoma,ESCC)和贲门腺癌(gastric cardiac adenocarcinoma,GCA)发病易感性的关系。方法采用聚合酶链反应-限制性片段长度多态性方法检测了330例ESCC、254例GCA患者和629名健康对照个体XRCC241657C/T、4234G/CSNP的基因型。结果XRCC241657C/TSNP中,ESCC组的CC、CT、TT3种基因型频率(67.8%、26.4%和5.8%)与对照组(68.8%、28.8%和2.4%)相比差异有统计学意义(χ2=7.43,P=0.02),与CC基因型相比,携带TT基因型能显著增加ESCC的发病风险(OR=2.12,95%CI:1.03～4.35);GCA组的CC、CT、TT3种基因型频率(59.8%、35.8%和4.3%)和等位基因分布与对照组相比差异均有统计学意义(χ2=7.46,7.23;P=0.02,0.01),与CC基因型相比,携带CT基因型的个体GCA的发病风险显著增加(OR=1.38,95%CI:1.01～1.89)。XRCC24234G/CSNP中,ESCC、GCA患者的基因型频率及等位基因分布与对照组相比差异无统计学意义(P值均>0.05)。与GG基因型相比,CG基因型及CC基因型均未增加ESCC和GCA的发病风险。两多态性位点联合分析显示,GCA组与对照组的单倍型分布差异有统计学意义(χ2=13.28,P<0.01)。与41657C/4234G单倍型相比,41657C/4234C和41657T/4234G单倍型均能显著增加GCA的发病风险(OR值分别为1.44和1.55,95%CI分别为1.06～1.95和1.18～2.02)。结论XRCC241657C/T多态可能成为预测高发区人群食管癌和贲门癌发病风险的独立因素;XRCC24234G/C多态可能与食管癌、贲门癌的发病风险无关;但41657C/4234C和41657T/4234G单倍型可能增加GCA的发病风险。     

VEGF基因多态性与子宫内膜异位症发病风险的相关性研究

目的探讨血管内皮生长因子（vascular endothelial growth factor,VEGF）-460C/T、-1154G/A、-2578C/A和＋936C/T单核苷酸多态性与子宫内膜异位症的关系。方法采用PCR-RFLP方法检测344例子宫内膜异位症患者（病例组）和360名对照妇女（对照组）的VEGF基因多态性位点的基因型频率分布情况。结果VEGF-460C/T和＋936C/T多态的基因型和等位基因频率分布在病例组与对照组间差异均无统计学意义（P〉0.05）。在病例组和对照组中,VEGF-1154G/A和VEGF-2578C/A多态的基因型及等位基因频率分布差异均有统计学意义（P〈0.05）;与GA＋AA/AA＋CA基因型相比,携带GG/CC基因型明显增加内异症的发病风险（OR=1.43,95%CI：1.05～1.96）/（OR=1.47,95%CI：1.09～2.00）。VEGF-460C/T、-1154G/A、-2578C/A多态的单倍型频率在病例组和对照组间差异有统计学意义（P=0.000）。结论1.携带VEGF-1154GG和-2578CC基因型显著增加子宫内膜异位症的发病风险;2.单倍型VEGF-460/-1154/-2578TGC,CAA,TAA和TAC与子宫内膜异位症的发病明显相关。     

135G>C and 172G>T polymorphism in the 5' untranslated region of RAD51 and sporadic endometrial cancer risk in Polish women

BACKGROUND : Despite advanced diagnostic and therapeutic procedures, endometrial cancer (EC) is still responsible for high morbidity and mortality of women. The genetic variability in RAD51 may contribute to the appearance and progression of various cancers including EC. AIM : We investigated the association of polymorphisms in the DNA repair genes RAD51 135G>C and 172G>T with endometrial cancer risk. MATERIAL AND METHODS : The genotypes of RAD51 135G>C and 172G>T polymorphism were determined by PCR-RFLP methods in endometrial tissue of 240 cancer subjects and 240 healthy subjects who served as controls. RESULTS : In the present work we demonstrated a significant positive association between the RAD51 C/C genotype and endometrial carcinoma, with an adjusted odds ratio (OR) of 13.0 (p < 0.0001). The distribution of genotypes for 135G>C SNP in endometrial cancer patients vs. controls was: 10% vs. 27% for GG, 13% vs. 58% for GC and 77% vs. 15% for CC genotype, respectively. Variant 135C allele of RAD51 increased the cancer risk (OR = 1.81; 95% CI 0.11-2.93, p = 0.022). The higher risk of EC occurrence was associated with the combined C135C-G172T genotype (OR = 7.69; 95% CI 3.45-17.12). CONCLUSION : The results indicated that the polymorphism 135G>C of the RAD51 gene may be positively associated with endometrial carcinoma in the Polish population. Further studies, conducted on a larger group, are required to clarify this point.     

RAD51 135G>C polymorphism and risk of familial breast cancer in a South American population

Several studies have reported that mutations in genes involved in maintenance of genome integrity may be responsible for increased cancer risk. Human RAD51, known to function in DNA repair, interacts with a number of proteins implicated in breast cancer (BC), including BRCA1 and BRCA2. Few studies have investigated the role of RAD51 gene variations in familial BC. To detect potential novel gene defects that may contribute to hereditary BC susceptibility, 143 patients belonging to 143 Chilean families tested for BRCA1 and BRCA2 mutations were screened for mutations in RAD51, using conformational sensitive gel electrophoresis (CSGE) and DNA sequencing. No mutations were detected in the exon or splice-boundary regions of the RAD51 gene in these families. The RAD51 135G>C polymorphism (c.-98G>C, rs1801320) was studied in a case-control design, to evaluate its possible association with BC susceptibility. The frequency of the RAD51 135C allele was established in 143 cases and 247 controls, using restriction fragment length polymorphism-polymerase chain reaction. RAD51 135C genotypes (G/C and C/C) were associated with an increased BC risk only among women with (a) a family history of BC, (b) BRCA1/2 negative (n = 131), and (c) age at onset <50 years (P = 0.020; OR = 2.17, 95% CI = 1.11-4.24). Thus, we propose that RAD51 135G>C polymorphism presents an increased risk of familial BC in women with age < 50 years at diagnosis, and this polymorphism may be a BC risk variant. This finding should be confirmed in other populations.     

survivin基因启动子区-31C/G多态性与散发性结直肠癌遗传易感性的关系

目的： 探讨生存素survivin基因启动子区-31C/G单核苷酸多态性与中国华南地区散发性结直肠癌（CRC）易感性的关系。 方法: 采用聚合酶链反应-限制性片段长度多态性法（PCR-RFLP）检测华南地区711例健康人和702例CRC的survivin基因-31C/G位点单核苷酸多态性。结果: 结直肠癌患者CC基因型的频率明显高于对照人群（36.5% vs 26.2 %,2=17.89,P<0.01）,与CC基因型相比,CG、GG基因型和等位基因G携带者的CRC发病风险分别显著下降至0.61倍（95%CI=0.46-0.80,P<0.01）、0.52倍（95%CI=0.38-0.71,P<0.01）和0.58倍（95%CI=0.45-0.74,P<0.01）。结论: survivin基因-31C/G多态与CRC发病风险有关,-31G变异基因型是中国南方人群散发性结直肠癌独立保护因素。     

Polymorphism of the homologous recombination repair genes RAD51 and XRCC3 in breast cancer

The RAD51 protein and its paralog, XRCC3, play an important role in the repair of DNA double-strand breaks (DSBs) by homologous recombination. Since DSBs may contribute to the pathogenesis of breast cancer and variability in DNA repair genes may be linked with some cancers, we performed a case-control study (135 cases and 175 controls) to check the association between the genotypes of the Thr241Met polymorphism of the XRCC3 gene and the 135G>C polymorphism of the RAD51 gene and breast cancer occurrence and progression. Genotypes were determined in peripheral blood lymphocytes by RFLP-PCR. We did not find any association between either polymorphism singly and breast cancer occurrence. Both polymorphisms were not related to tumor size, estrogen and progesterone receptors status, cancer type and grade. However, the Thr241Met genotype of the XRCC3 polymorphism slightly increased the risk of local metastasis in breast cancer patients (OR 2.56, 95% CI 1.27-5.17). The combined Thr241Met/135G>C genotype decreased the risk of breast cancer occurrence (OR 0.22, 95% CI 0.08-0.59). Our results suggest that the variability of the DNA homologous recombination repair genes RAD51 and XRCC3 may play a role in breast cancer occurrence and progression, but this role may be underlined by a mutual interaction between these genes.     

RAD51C is a susceptibility gene for ovarian cancer

A homozygous mutation in the RAD51C gene was recently found to cause Fanconi anemia-like disorder. Furthermore, six heterozygous deleterious RAD51C mutations were detected in German breast and ovarian cancer families. We screened 277 Finnish familial breast or ovarian cancer patients for RAD51C and identified two recurrent deleterious mutations (c.93delG and c.837+1G>A). These mutations were further genotyped in 491 familial breast cancer patients, 409 unselected ovarian cancer patients and two series of unselected breast cancer cases (884 from Helsinki and 686 from Tampere) and population controls (1279 and 807, respectively). The mutation frequency among all breast cancer cases was not different from the controls (4 out of 2239, 0.2% versus population controls 2 out of 2086, 0.1%, P= 0.7). In the Helsinki series, each mutation was found in four cases with personal or family history of ovarian cancer. No mutations were found among cases with familial breast cancer only, four out of the eight carriers did not have family history of breast cancer. The mutations associated with an increased risk of familial breast and ovarian cancer (OR: 13.59, 95% CI 1.89-97.6, P= 0.026 compared with controls), but especially with familial ovarian cancer in the absence of breast cancer (OR: 213, 95% CI 25.6-1769, P= 0.0002) and also with unselected ovarian cancer (OR: 6.31, 95% CI 1.15-34.6, P= 0.033), with a significantly higher mutation rate among the familial cases (two out of eight, 25%) than the unselected ovarian cancer cases (4 out of 409, 1%) (OR: 33.8, 95% CI 5.15-221, P= 0.005). These results suggest RAD51C as the first moderate-to-high risk susceptibility gene for ovarian cancer.     

基质金属蛋白酶1基因多态性与肺癌易感性的关联研究

目的研究我国西北汉族人群基质金属蛋白酶（matrix metalloproteinase 1，MMP1）基因-1607（1G→2G）多态与肺癌发生风险的关系。方法应用聚合酶链反应-限制性片段长度多态性分析的方法，检测了150例肺癌患者和200名正常对照者删1G→2G多态的基因型，比较不同基因型与肺癌发生风险的关系。结果肺癌组2G／2G基因型频率要高于对照组（X^2=5．896，P〈0．05），2G／2G基因型者患肺癌的风险是1G／2G和1G／1G基因型的1．77倍（OR=1．77；95％CI：1．12—2．91）。吸烟者中2G／2G基因型发生肺癌的风险是1G／2G和1G／1G基因型的3．20倍（OR=3．20；95％CI：1．50～6．82）。结论我国西北汉族人群MMP1基因-1607（1G→2G）多态性与肺癌易感性有关，2G／2G基因型可以增加肺癌发生风险。     

Polymorphisms of the XRCC3 C722T and the RAD51 G135C genes and the risk of head and neck cancer in a Polish population

Genetic variations in DNA repair genes may affect an individual's susceptibility to head and neck cancer. We performed a case–control study to test the association between head and neck cancer risk and two polymorphisms: the C722 T of the XRCC3 and the G135C of the RAD51 —genes of DNA double strand break (DSB) repair by homologous recombination (HRR). Genotypes were determined by PCR-restriction fragment lenght polymorphism (PCR-RFLP). DNA was isolated from peripheral blood lymphocytes of a group of 288 patients consisting of 97 subjects with precancerous hyperplastic laryngeal lesions (PHLL) and 191 subjects with head and neck squamous cell carcinoma (HNSCC) as well as 353 healthy control donors. We found an association between PHLL and the 722CT (OR 6.67; 95% CI 3.02–14.74) as well as 722 TT (OR 4.65; 95% CI 2.30–9.43) variants of the XRCC3 gene. Similar relation was observed between these genotypes and HNSCC (OR 2.59; 95% CI 1.61–4.16 and OR 5.54; 95% CI 3.22–9.52, respectively). Moreover, we also observed an association between PHLL (OR 6.04; 95% CI 3.69–9.90) and HNSCC (OR 6.04; 95% CI 3.69–9.90) and the135GC variant of the RAD51 gene. The gene–gene interaction between XRCC3 and RAD51 polymorphic variants may contribute to higher prevalence of PHLL. The increased risk of this disease was observed in case of the combination of the 722CT/135GC (OR 3.81; 95% CI 1.55–9.75) as well as the 722 TT/135GC genotypes (OR 5.33; 95% CI 1.96–14.47). The presence of the same genes combinations plays a part in higher probability of HNSCC occurrence (OR 2.42; 95% CI 1.22–4.79 for 722CT/135GC and OR 3.63; 95% CI 1.69–7.76 for 722 TT/135GC). We also found an association between these XRCC3 or RAD51 polymorphic variants and smoking status in PHLL (ORs 2.85–10.28 and 1.82–7.35, respectively) and HNSCC patients (ORs 2.94–13.93 and 1.36–3.94, respectively) as well as alcohol intake among PHLL (ORs 3.44–6.12 and 3.52–8.43, respectively) and HNSCC subjects (ORs 2.71–7.01 and 2.33–4.62, respectively). In conclusion our data showed that the C722 T and the G135C polymorphisms of the XRCC3 and the RAD51 genes might be associated with HNSCC. Finally we suggested that these polymorphisms might be used as predictive factor of precancerous lesion for head and neck cancer in a Polish population.     

Correlation between survivin genetic polymorphisms and lung cancer susceptibility

Aims: The purpose of the study was to analyze the relationship of survivin polymorphisms including -31G/C, -625G/C, 9194A/G and 9809T/C with the susceptibility to lung cancer. Methods: Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to test the polymorphisms of -31G/C, -625G/C, 9194A/G and 9809T/C in 104 patients with lung cancer and 104 healthy controls. Then, linkage disequilibrium and haplotypes were analyzed by HaploView software. The differences of genotype, allele and haplotype frequencies in case and control group were assessed via chi-square test. Odds ratio (OR) with 95% CI were used to evaluate the correlation of survivin polymorphisms with lung cancer. Results: Genotype distribution of each polymorphism site in control group was in agreement with Hardy-Weinberg equilibrium (HWE) (P>0.05). The frequency of -31G/C CC genotype and C allele in case group were much higher than that of controls, respectively (CC: 33.6% vs. 22.1%; C: 57.2% vs. 46.6%) and CC genotype as well as C allele were appeared to be risk factors for lung cancer. Meanwhile, 9194A/G GG genotype could increase the risk for lung cancer (OR=2.86, 95% CI=1.14-7.20). The risk of G allele carriers for lung caner was higher than that of A allele (OR=1.63, 95% CI=1.08-2.47). The haplotypes analysis indicated that CGGC and GCAT were associated with the susceptibility to lung cancer (OR=2.79, 95% CI=1.58-4.92; OR=2.36, 95% CI=1.29-4.30). Conclusions: Survivin -31G/C and 9194A/G polymorphisms were associated with the risk of lung cancer. The CGGC and GCAT haplotypes carriers were more likely to develop lung cancer.