Matrix metalloproteinase 2(MMP2) has been shown to play an important role in several steps of cancer development.The-1306C/T polymorphism of the MMP2 gene displays a strikingly lower promoter activity than the T allel...Matrix metalloproteinase 2(MMP2) has been shown to play an important role in several steps of cancer development.The-1306C/T polymorphism of the MMP2 gene displays a strikingly lower promoter activity than the T allele,and the CC genotype in the MMP2 promoter has been reported to associate with the development of several cancers.To assess the contribution of the MMP2-1306C/T polymorphism to the risk of nasopharyngeal carcinoma(NPC),we conducted a case-control study and analyzed MMP2 genotypes in 370 patients with NPC and 390 frequency-matched controls using real-time PCR-based TaqMan allele analysis.We found that subjects with the CC genotype had an increased risk(OR = 1.55,95% CI = 1.05-2.27) of developing NPC compared to those with the CT or TT genotypes.Furthermore,we found that the risk of NPC was markedly increased in subjects who were smokers(OR = 15.04,95% CI = 6.65-33.99),heavy smokers who smoked ≥20 pack-years(OR = 18.66,95% CI = 7.67-45.38),or young(<60 years) at diagnosis(OR = 1.52,95% CI = 1.01-2.29).Our results provide molecular epidemiological evidence that the MMP2-1306C/T promoter polymorphism is associated with NPC risk,and this association is especially noteworthy in heavy smokers.展开更多
Background:The current World Health Organization(WHO) classification of nasopharyngeal carcinoma(NPC) con?veys little prognostic information.This study aimed to propose an NPC histopathologic classification that can p...Background:The current World Health Organization(WHO) classification of nasopharyngeal carcinoma(NPC) con?veys little prognostic information.This study aimed to propose an NPC histopathologic classification that can poten?tially be used to predict prognosis and treatment response.Methods:We initially developed a histopathologic classification based on the morphologic traits and cell differentia?tion of tumors of 2716 NPC patients who were identified at Sun Yat?sen University Cancer Center(SYSUCC)(training cohort).Then,the proposed classification was applied to 1702 patients(retrospective validation cohort) from hospitals outside SYSUCC and 1613 patients(prospective validation cohort) from SYSUCC.The efficacy of radiochemotherapy and radiotherapy modalities was compared between the proposed subtypes.We used Cox proportional hazards models to estimate hazard ratios(HRs) with 95% confidence intervals(CI) for overall survival(OS).Results:The 5?year OS rates for all NPC patients who were diagnosed with epithelial carcinoma(EC;3708 patients),mixed sarcomatoid?epithelial carcinoma(MSEC;1247 patients),sarcomatoid carcinoma(SC;823 patients),and squamous cell carcinoma(SCC;253 patients) were 79.4%,70.5%,59.6%,and 42.6%,respectively(P < 0.001).In mul?tivariate models,patients with MSEC had a shorter OS than patients with EC(HR = 1.44,95% CI = 1.27–1.62),SC(HR = 2.00,95% CI = 1.76–2.28),or SCC(HR = 4.23,95% CI = 3.34–5.38).Radiochemotherapy significantly improved survival compared with radiotherapy alone for patients with EC(HR 49–0.75),and possibly for those with SCC(HR = 0.67,95% CI = 0.56–0.80),MSEC(HR = 0.58,95% CI = 0..74–1.28).= 0.63;95% CI = 0.40–0.98),but not for patients with SC(HR = 0.97,95% CI = 0Conclusions:The proposed classification offers more information for the prediction of NPC prognosis compared with the WHO classification and might be a valuable tool to guide treatment decisions for subtypes that are associ?ated with a poor prognosis.展开更多
To investigate whether alcohol and tea con-sumption has an etiological association with nasophar-yngeal carcinoma(NPC)in a high-incident population,a large scale case-control study was conducted.The study included 284...To investigate whether alcohol and tea con-sumption has an etiological association with nasophar-yngeal carcinoma(NPC)in a high-incident population,a large scale case-control study was conducted.The study included 2846 individuals in Guangdong Province,China,with 1387 newly diagnosed cases of NPC and 1459 frequency-matched controls.Exposure histories of alcohol and tea consumption were obtained via personal inter-views.Information regarding socio-demographic charac-teristics(age,sex,education,dialect and household type),family history of NPC,Epstein-Barr virus(EBV)infection,dietary habits and other potential confounding factors was also studied.An analysis was performed using uncondi-tional logistic regression to calculate odds ratios(OR)and 95%confidence intervals(CI).The risk of NPC was found to be associated with habitual alcohol consumption and tea consumption.Tea consumption has been associated with a decreased occurrence of NPC(OR=0.62),while con-sumption of alcohol was associated with a complex effect.Specifically,moderate consumption of alcohol was associated with decreased risk of NPC,while overuse,especially strong distillate spirits,appeared to be a risk factor.展开更多
基金supported in part by grants from the Chinese State Key Basic Research Project (No.2011CB504805)National High Technology Research and Development Program of China (863 Program) (No.20060102A4002)a grant of 985 Project from Ministry of Education of P. R. China
文摘Matrix metalloproteinase 2(MMP2) has been shown to play an important role in several steps of cancer development.The-1306C/T polymorphism of the MMP2 gene displays a strikingly lower promoter activity than the T allele,and the CC genotype in the MMP2 promoter has been reported to associate with the development of several cancers.To assess the contribution of the MMP2-1306C/T polymorphism to the risk of nasopharyngeal carcinoma(NPC),we conducted a case-control study and analyzed MMP2 genotypes in 370 patients with NPC and 390 frequency-matched controls using real-time PCR-based TaqMan allele analysis.We found that subjects with the CC genotype had an increased risk(OR = 1.55,95% CI = 1.05-2.27) of developing NPC compared to those with the CT or TT genotypes.Furthermore,we found that the risk of NPC was markedly increased in subjects who were smokers(OR = 15.04,95% CI = 6.65-33.99),heavy smokers who smoked ≥20 pack-years(OR = 18.66,95% CI = 7.67-45.38),or young(<60 years) at diagnosis(OR = 1.52,95% CI = 1.01-2.29).Our results provide molecular epidemiological evidence that the MMP2-1306C/T promoter polymorphism is associated with NPC risk,and this association is especially noteworthy in heavy smokers.
基金supported by grants from the National High Technology Research and Development Program of China(863 Program)(No.2012AA02A501)the Chinese State Key Basic Research Project(No.2011CB504805)the National Natural Science Foundation of China(No.81272952 and No.81472522)
文摘Background:The current World Health Organization(WHO) classification of nasopharyngeal carcinoma(NPC) con?veys little prognostic information.This study aimed to propose an NPC histopathologic classification that can poten?tially be used to predict prognosis and treatment response.Methods:We initially developed a histopathologic classification based on the morphologic traits and cell differentia?tion of tumors of 2716 NPC patients who were identified at Sun Yat?sen University Cancer Center(SYSUCC)(training cohort).Then,the proposed classification was applied to 1702 patients(retrospective validation cohort) from hospitals outside SYSUCC and 1613 patients(prospective validation cohort) from SYSUCC.The efficacy of radiochemotherapy and radiotherapy modalities was compared between the proposed subtypes.We used Cox proportional hazards models to estimate hazard ratios(HRs) with 95% confidence intervals(CI) for overall survival(OS).Results:The 5?year OS rates for all NPC patients who were diagnosed with epithelial carcinoma(EC;3708 patients),mixed sarcomatoid?epithelial carcinoma(MSEC;1247 patients),sarcomatoid carcinoma(SC;823 patients),and squamous cell carcinoma(SCC;253 patients) were 79.4%,70.5%,59.6%,and 42.6%,respectively(P < 0.001).In mul?tivariate models,patients with MSEC had a shorter OS than patients with EC(HR = 1.44,95% CI = 1.27–1.62),SC(HR = 2.00,95% CI = 1.76–2.28),or SCC(HR = 4.23,95% CI = 3.34–5.38).Radiochemotherapy significantly improved survival compared with radiotherapy alone for patients with EC(HR 49–0.75),and possibly for those with SCC(HR = 0.67,95% CI = 0.56–0.80),MSEC(HR = 0.58,95% CI = 0..74–1.28).= 0.63;95% CI = 0.40–0.98),but not for patients with SC(HR = 0.97,95% CI = 0Conclusions:The proposed classification offers more information for the prediction of NPC prognosis compared with the WHO classification and might be a valuable tool to guide treatment decisions for subtypes that are associ?ated with a poor prognosis.
基金supported by the National Natural Science Foundation of China(Grant Nos.30671798 and 30471487)the National Science and Technology Support Program of China(No.2006BAI02A11)the National Major Basic Research Program of China(863 Program)(No.2006AA02A404).
文摘To investigate whether alcohol and tea con-sumption has an etiological association with nasophar-yngeal carcinoma(NPC)in a high-incident population,a large scale case-control study was conducted.The study included 2846 individuals in Guangdong Province,China,with 1387 newly diagnosed cases of NPC and 1459 frequency-matched controls.Exposure histories of alcohol and tea consumption were obtained via personal inter-views.Information regarding socio-demographic charac-teristics(age,sex,education,dialect and household type),family history of NPC,Epstein-Barr virus(EBV)infection,dietary habits and other potential confounding factors was also studied.An analysis was performed using uncondi-tional logistic regression to calculate odds ratios(OR)and 95%confidence intervals(CI).The risk of NPC was found to be associated with habitual alcohol consumption and tea consumption.Tea consumption has been associated with a decreased occurrence of NPC(OR=0.62),while con-sumption of alcohol was associated with a complex effect.Specifically,moderate consumption of alcohol was associated with decreased risk of NPC,while overuse,especially strong distillate spirits,appeared to be a risk factor.
