Objective: To explore the possible mechanisms of growth regression of human androgen dependent prostate carcinoma cells caused by androgen withdrawal. Methods: After 24 h of treatment with 1 × 10-9 mol/L dihydrot...Objective: To explore the possible mechanisms of growth regression of human androgen dependent prostate carcinoma cells caused by androgen withdrawal. Methods: After 24 h of treatment with 1 × 10-9 mol/L dihydrotestosterone (DHT), the expression of phosphorylated ERK proteins and cell cycle regulation molecules including CDK2, CDK4, CDK6 and P27kip1 in human androgen dependent prostate carcinoma cell line LNCaP was measured by Western blot analysis 0 h, 8 h and 24 h of after androgen withdrawal. Human androgen independent prostate carcinoma cell line PC-3 was also examined as control. Results: Down-regulation of phosphorylated ERK, CDK2, CDK4 and CDK6 and up-regulation of P27kip1 were found initially in LNCaP cell line 8 h after androgen withdrawal. The levels of phosphorylated ERK and CDKs decreased continuously and reached the lowest after 24 h, while continuous elevation of P27kip1 was detected thereafter to 24 h. No expression change of phosphorylated ERK, CDKs and P27kip1 were detected in PC-3 cell line. Conclusion: The androgen withdrawal can cause ERKs activation decrease and cell cycle regulation molecules changes, which may be one of the mechanisms for inhibited growth of androgen dependent prostate carcinoma after androgen ablation by either operative or medicine methods.展开更多
Objective To evaluate the outcomes of T3 a prostate cancer with unfavorable prognostic factors treated with permanent interstitial brachytherapy combined with external radiotherapy and hormone therapy.Methods From Jan...Objective To evaluate the outcomes of T3 a prostate cancer with unfavorable prognostic factors treated with permanent interstitial brachytherapy combined with external radiotherapy and hormone therapy.Methods From January 2003 to December 2008,38 patients classified as T3 a prostate cancer with unfavorable prognostic factors were treated with trimodality therapy(brachytherapy + external radiotherapy + hormone therapy).The prescription dose of brachytherapy and external radiotherapy were 110 Gy and 45 Gy,respectively.The duration of hormone therapy was 2-3 years.The endpoints of this study included biochemical failure-free survival(BFFS),distant metastasis-free survival(DMFS),cancer-specific survival(CSS),and overall survival(OS).Survival curves were calculated using the Kaplan-Meier method.The Log-rank test was used to identify the prognostic predictors for univariate analysis.Results The median follow-up was 71 months.The serum pre-treatment prostate-specific antigen(PSA) level ranged from 10.0 to 99.8 ng/ml(mean 56.3 ng/ml),the Gleason score ranged from 5 to 9(median 8),and the percentage of positive biopsy cores ranged from 10% to 100%(mean 65%).The 5-year BFFS,DMFS,CSS,and OS rates were 44%,69%,82%,and 76%,respectively.All biochemical failures occurred within 40 months.The percentage of positive biopsy cores was significantly correlated with BFFS,DMFS,and OS(all P=0.000),and the Gleason score with DMFS(P=0.000) and OS(P=0.001).Conclusions T3 a prostate cancer with unfavorable prognostic factors presents not so optimistic outcome.Hormone therapy should be applied to prolong the biochemical progression-free or metastasis-free survival.The percentage of positive biopsy cores and the Gleason score are significant prognostic factors.展开更多
Periodontitis has been proposed as a novel risk factor of genitourinary cancers:although periodontitis and genitourinary cancers are two totally distinct types of disorders,epidemiological and clinical studies,have es...Periodontitis has been proposed as a novel risk factor of genitourinary cancers:although periodontitis and genitourinary cancers are two totally distinct types of disorders,epidemiological and clinical studies,have established associations between them.Dysbiosis of oral microbiota has already been established as a major factor contributing to periodontitis.Recent emerging epidemiological evidence and the detection of oral microbiota in genitourinary organs indicate the presence of an oral-genitourinary axis and oral microbiota may be involved in the pathogenesis of genitourinary cancers.Therefore,oral microbiota provides the bridge between periodontitis and genitourinary cancers.We have carried out this narrative review which summarizes epidemiological studies exploring the association between periodontitis and genitourinary cancers.We have also highlighted the current evidence demonstrating the capacity of oral microbiota to regulate almost all hallmarks of cancer,and proposed the potential mechanisms of oral microbiota in the development of genitourinary cancers.展开更多
文摘Objective: To explore the possible mechanisms of growth regression of human androgen dependent prostate carcinoma cells caused by androgen withdrawal. Methods: After 24 h of treatment with 1 × 10-9 mol/L dihydrotestosterone (DHT), the expression of phosphorylated ERK proteins and cell cycle regulation molecules including CDK2, CDK4, CDK6 and P27kip1 in human androgen dependent prostate carcinoma cell line LNCaP was measured by Western blot analysis 0 h, 8 h and 24 h of after androgen withdrawal. Human androgen independent prostate carcinoma cell line PC-3 was also examined as control. Results: Down-regulation of phosphorylated ERK, CDK2, CDK4 and CDK6 and up-regulation of P27kip1 were found initially in LNCaP cell line 8 h after androgen withdrawal. The levels of phosphorylated ERK and CDKs decreased continuously and reached the lowest after 24 h, while continuous elevation of P27kip1 was detected thereafter to 24 h. No expression change of phosphorylated ERK, CDKs and P27kip1 were detected in PC-3 cell line. Conclusion: The androgen withdrawal can cause ERKs activation decrease and cell cycle regulation molecules changes, which may be one of the mechanisms for inhibited growth of androgen dependent prostate carcinoma after androgen ablation by either operative or medicine methods.
文摘Objective To evaluate the outcomes of T3 a prostate cancer with unfavorable prognostic factors treated with permanent interstitial brachytherapy combined with external radiotherapy and hormone therapy.Methods From January 2003 to December 2008,38 patients classified as T3 a prostate cancer with unfavorable prognostic factors were treated with trimodality therapy(brachytherapy + external radiotherapy + hormone therapy).The prescription dose of brachytherapy and external radiotherapy were 110 Gy and 45 Gy,respectively.The duration of hormone therapy was 2-3 years.The endpoints of this study included biochemical failure-free survival(BFFS),distant metastasis-free survival(DMFS),cancer-specific survival(CSS),and overall survival(OS).Survival curves were calculated using the Kaplan-Meier method.The Log-rank test was used to identify the prognostic predictors for univariate analysis.Results The median follow-up was 71 months.The serum pre-treatment prostate-specific antigen(PSA) level ranged from 10.0 to 99.8 ng/ml(mean 56.3 ng/ml),the Gleason score ranged from 5 to 9(median 8),and the percentage of positive biopsy cores ranged from 10% to 100%(mean 65%).The 5-year BFFS,DMFS,CSS,and OS rates were 44%,69%,82%,and 76%,respectively.All biochemical failures occurred within 40 months.The percentage of positive biopsy cores was significantly correlated with BFFS,DMFS,and OS(all P=0.000),and the Gleason score with DMFS(P=0.000) and OS(P=0.001).Conclusions T3 a prostate cancer with unfavorable prognostic factors presents not so optimistic outcome.Hormone therapy should be applied to prolong the biochemical progression-free or metastasis-free survival.The percentage of positive biopsy cores and the Gleason score are significant prognostic factors.
基金the Zhongnan Hospital of Wuhan University Science,Technology and Innovation Seed Fund(No.znpy2019011)the Fundamental Research Funds for the Central Universities(No.2042020kf0130)+1 种基金the Nature Science Foundation of Hubei Province(No.2019FFB03902)the Health Commission of Hubei Province Scientific Research Project(No.WJ2019H035).
文摘Periodontitis has been proposed as a novel risk factor of genitourinary cancers:although periodontitis and genitourinary cancers are two totally distinct types of disorders,epidemiological and clinical studies,have established associations between them.Dysbiosis of oral microbiota has already been established as a major factor contributing to periodontitis.Recent emerging epidemiological evidence and the detection of oral microbiota in genitourinary organs indicate the presence of an oral-genitourinary axis and oral microbiota may be involved in the pathogenesis of genitourinary cancers.Therefore,oral microbiota provides the bridge between periodontitis and genitourinary cancers.We have carried out this narrative review which summarizes epidemiological studies exploring the association between periodontitis and genitourinary cancers.We have also highlighted the current evidence demonstrating the capacity of oral microbiota to regulate almost all hallmarks of cancer,and proposed the potential mechanisms of oral microbiota in the development of genitourinary cancers.
