Objective To investigate the expression of programmed cell death 5 （PDCD5） in tissues of normal human prostate （NP）, benign prostatic hyperplasia （BPH）, and prostate cancer （PCa） in order to assess the clinica...Objective To investigate the expression of programmed cell death 5 （PDCD5） in tissues of normal human prostate （NP）, benign prostatic hyperplasia （BPH）, and prostate cancer （PCa） in order to assess the clinical role of PDCD5 in PCa. Methods PDCD5 expression was determined by EnVision immunohistochemical staining in forma-lin-fixed and paraffin-embedded specimens obtained from 12 subjects with NP, 22 with BPH, and 22 with PCa. In addition, PCa cases were classified as low/middle-risk （Gleason sumS7） and high-risk （Gleason sum〉7） on the basis of Gleason grade. Positive expression rates and intensity of PDCD5 protein were observed under light microscope and analyzed with computer imaging technique. Expression of PDCD5 was compared among different prostatic tissues. Results The expression of PDCD5 was significantly lower in tissue of PCa than in tissues of NP and BPH （P〈0.01）. However, there was no significant difference in PDCD5 expression between tissues of NP and BPH. In addition, the expression of PDCD5 was further downregulated with the increase of Gleason sum in PCa. Conclusions By downregulating apoptosis, low PDCD5 expression may play an important role in the occurrence and development of PCa. PDCD5 is supposed to have a potential clinical value to be a new predictor of progression and target of gene therapy in PCa.展开更多
This study examined the expression pattern of programmed cell death 5 (PDCD5) in co-chlear hair cells and spiral ganglion neurons (SGNs) and its association with age-related hearing loss in mice.Sixty C57BL/6J (C57) m...This study examined the expression pattern of programmed cell death 5 (PDCD5) in co-chlear hair cells and spiral ganglion neurons (SGNs) and its association with age-related hearing loss in mice.Sixty C57BL/6J (C57) mice at different ages were divided into four groups (3,6,9 or 12 months).PDCD5 expression was detected by using immunohistochemistry,real-time PCR and Western blot.Morphological change of the cochleae was also evaluated by using immunoassay.The results showed that the expression of PDCD5 had a gradual increase with ageing in both protein and RNA levels in C57 mice,as well as gradually increased apoptosis of cochlear hair cells and SGNs.In addition,we also found that caspase-3 activity was enhanced and its expression was enhanced with ageing.It is implied that overexpression of PDCD5 causes the increase in caspase-3 activity and the subsequent increase of apoptosis in cochlear hair cells and SGNs,and thereby plays a role in the pathogenesis of presbycusis.Thus,PDCD5 may be a new target site for the treatment and prevention of age-related hearing loss.展开更多
Background Programmed cell death 5 （PDCD5） is a novel apoptotic regulatory gene that promotes apoptosis in various tumor cells. Studies have shown that PDCD5 accelerates the apoptosis of synoviocytes in vitro, imply...Background Programmed cell death 5 （PDCD5） is a novel apoptotic regulatory gene that promotes apoptosis in various tumor cells. Studies have shown that PDCD5 accelerates the apoptosis of synoviocytes in vitro, implying a potential role in rheumatoid arthritis （RA） pathogenesis. This study examined the expression of PDCD5 in serum and synovial fluid of RA patients, its effect on the expression of inflammatory cytokine, interleukin-17 （IL-17）, and the assessment of disease activity in RA. Methods PDCD5 and IL-17 levels in serum and synovial fluid from 18 patients with RA and 22 patients with osteoarthritis （OA） were detected using enzyme-linked immunosorbent assay （ELISA）. Concentrations of serum PDCD5 in 40 healthy people were also detected as controls. As disease activity indices, C-reactive protein （CRP）, erythrocyte sedimentation rate （ESR）, rheumatoid factor （RF）, and X-ray grading scale were also evaluated. Results Serum and synovial fluid PDCD5 levels in RA patients were significantly higher than those in OA and healthy controls. Serum PDCD5 level was inversely correlated to CRP and ESR, and was significantly higher in the RF negative group than in the positive group. PDCD5 level was also negatively correlated with IL-17 levels both in serum and synovial fluid of RA patients. However, differences in synovial fluid PDCD5 level from RA patients at different Larsen stages were not detectable. Conclusions PDCD5 affects RA pathogenesis. Insufficient apoptosis of fibroblast-like synoviocytes and inflammatory cells in RA could increase the expression of PDCD5 protein. As PDCD5 levels correlated negatively with disease activity indices and IL-17 level, PDCD5 could become a target in the diagnosis and treatment of RA.展开更多
Background： Ovarian cancer is a leading gynecological malignancy. We investigated the prognostic value of programmed cell death 5 （PDCD5） in patients with ovarian cancer. Methods： Expression levels of PDCD5 mRNA a...Background： Ovarian cancer is a leading gynecological malignancy. We investigated the prognostic value of programmed cell death 5 （PDCD5） in patients with ovarian cancer. Methods： Expression levels of PDCD5 mRNA and protein were examined in six ovarian cancer cell lines （SKOV3, CAOV3, ES2, OV1, 3AO, and HOC 1 A） and one normal ovarian epithelial cell line （T29） using reverse transcription polymerase chain reaction, Western blotting, and flow cytolnetry. Alter inducing PDCD5 induction in SKOV3 cells or treating this cell line with taxol or doxorubicin （either alone or combined）, apoptosis was measured by Annexin V-FITC/propidium iodide staining. Correlations between PDCD5 protein expression and pathological features, histological grade, FIGO stage, effective cytoreductive surgery, and serum cancer antigen-125 values were evaluated in patients with ovarian cancer. Results： PDCD5 mRNA and protein expression were downregulated in ovarian cancer cells. Recombinant human PDCD5 increased doxorubicin-induced apoptosis in SKOV3 cells （15.96 ± 2.07%, vs. 3.17 ± 1.45% in controls）. In patients with ovarian cancer, PDCD5 expression was inversely correlated with FIGO stage, pathological grade, and patient survival （P 〈 0.05, R = 0.7139 for survival）. Conclusions： PDCD5 expression is negatively correlated with disease progression and stage in ovarian cancer. Therefore, measuring PDCD5 expression may be a good method of determining the prognosis of ovarian cancer patients.展开更多
The primary aim of the present study was to investigate the overexpression of the rice （Oryza sativa L.） programmed cell death 5 （OsPDCD5） gene in rice plant. Constitutive expression of OsPDCD5 from the cauliflowe...The primary aim of the present study was to investigate the overexpression of the rice （Oryza sativa L.） programmed cell death 5 （OsPDCD5） gene in rice plant. Constitutive expression of OsPDCD5 from the cauliflower mosaic virus （CaMV） 35S promoter induced programmed cell death （PCD） in transgenic rice. Programmed cell death was accompanied by typical features, including inhibition of developmental growth, a reduction of fresh weight, degradation of total protein content, and fragmentation of genomic DNA. These results suggest that OsPDCD5 plays an essential role in the regulation of PCD in rice plants.展开更多
目的:分析新凋亡促进因子-程序化细胞死亡分子5(programmed cell death 5,PDCD5)在肝细胞癌(hepatocellular carcinoma,HCC)发生发展中的作用.方法:用免疫组织化学法(immunohisto-chemistry,IHC)检测40例HCC及其癌旁组织(包括24例肝硬化...目的:分析新凋亡促进因子-程序化细胞死亡分子5(programmed cell death 5,PDCD5)在肝细胞癌(hepatocellular carcinoma,HCC)发生发展中的作用.方法:用免疫组织化学法(immunohisto-chemistry,IHC)检测40例HCC及其癌旁组织(包括24例肝硬化和16例慢性肝炎)中的PDCD5和Fas蛋白表达.用等级资料Kruskal-WallisH检验方法进行统计学分析,并用Spearman's等级资料的相关分析比较PDCD5和Fas的表达差异.结果:PDCD5在肝癌组织中多呈阴性表达,在癌旁肝组织中表达增加.肝癌及其癌旁肝硬化肝炎各组间PDCD5表达具有显著性差异(χ2=46.03,P=0.000).Fas在肝癌组织及其癌旁肝硬化或慢性肝炎组织中的表达分布与PDCD5相似,各组间Fas表达有显著性差异(χ2=24.45P=0.000).PDCD5与Fas的相关性分析结果显示,两者呈正相关(r=0.839,P=0.001).结论:PDCD5是HCC发生、发展过程中的一个重要凋亡调控因子.展开更多
文摘Objective To investigate the expression of programmed cell death 5 （PDCD5） in tissues of normal human prostate （NP）, benign prostatic hyperplasia （BPH）, and prostate cancer （PCa） in order to assess the clinical role of PDCD5 in PCa. Methods PDCD5 expression was determined by EnVision immunohistochemical staining in forma-lin-fixed and paraffin-embedded specimens obtained from 12 subjects with NP, 22 with BPH, and 22 with PCa. In addition, PCa cases were classified as low/middle-risk （Gleason sumS7） and high-risk （Gleason sum〉7） on the basis of Gleason grade. Positive expression rates and intensity of PDCD5 protein were observed under light microscope and analyzed with computer imaging technique. Expression of PDCD5 was compared among different prostatic tissues. Results The expression of PDCD5 was significantly lower in tissue of PCa than in tissues of NP and BPH （P〈0.01）. However, there was no significant difference in PDCD5 expression between tissues of NP and BPH. In addition, the expression of PDCD5 was further downregulated with the increase of Gleason sum in PCa. Conclusions By downregulating apoptosis, low PDCD5 expression may play an important role in the occurrence and development of PCa. PDCD5 is supposed to have a potential clinical value to be a new predictor of progression and target of gene therapy in PCa.
基金supported by a grant from the National Natural Science Foundation of China (No. 30672307)
文摘This study examined the expression pattern of programmed cell death 5 (PDCD5) in co-chlear hair cells and spiral ganglion neurons (SGNs) and its association with age-related hearing loss in mice.Sixty C57BL/6J (C57) mice at different ages were divided into four groups (3,6,9 or 12 months).PDCD5 expression was detected by using immunohistochemistry,real-time PCR and Western blot.Morphological change of the cochleae was also evaluated by using immunoassay.The results showed that the expression of PDCD5 had a gradual increase with ageing in both protein and RNA levels in C57 mice,as well as gradually increased apoptosis of cochlear hair cells and SGNs.In addition,we also found that caspase-3 activity was enhanced and its expression was enhanced with ageing.It is implied that overexpression of PDCD5 causes the increase in caspase-3 activity and the subsequent increase of apoptosis in cochlear hair cells and SGNs,and thereby plays a role in the pathogenesis of presbycusis.Thus,PDCD5 may be a new target site for the treatment and prevention of age-related hearing loss.
基金The study was supported by a grant from the National Natural Science Foundation of China （No. 81071447）.
文摘Background Programmed cell death 5 （PDCD5） is a novel apoptotic regulatory gene that promotes apoptosis in various tumor cells. Studies have shown that PDCD5 accelerates the apoptosis of synoviocytes in vitro, implying a potential role in rheumatoid arthritis （RA） pathogenesis. This study examined the expression of PDCD5 in serum and synovial fluid of RA patients, its effect on the expression of inflammatory cytokine, interleukin-17 （IL-17）, and the assessment of disease activity in RA. Methods PDCD5 and IL-17 levels in serum and synovial fluid from 18 patients with RA and 22 patients with osteoarthritis （OA） were detected using enzyme-linked immunosorbent assay （ELISA）. Concentrations of serum PDCD5 in 40 healthy people were also detected as controls. As disease activity indices, C-reactive protein （CRP）, erythrocyte sedimentation rate （ESR）, rheumatoid factor （RF）, and X-ray grading scale were also evaluated. Results Serum and synovial fluid PDCD5 levels in RA patients were significantly higher than those in OA and healthy controls. Serum PDCD5 level was inversely correlated to CRP and ESR, and was significantly higher in the RF negative group than in the positive group. PDCD5 level was also negatively correlated with IL-17 levels both in serum and synovial fluid of RA patients. However, differences in synovial fluid PDCD5 level from RA patients at different Larsen stages were not detectable. Conclusions PDCD5 affects RA pathogenesis. Insufficient apoptosis of fibroblast-like synoviocytes and inflammatory cells in RA could increase the expression of PDCD5 protein. As PDCD5 levels correlated negatively with disease activity indices and IL-17 level, PDCD5 could become a target in the diagnosis and treatment of RA.
文摘Background： Ovarian cancer is a leading gynecological malignancy. We investigated the prognostic value of programmed cell death 5 （PDCD5） in patients with ovarian cancer. Methods： Expression levels of PDCD5 mRNA and protein were examined in six ovarian cancer cell lines （SKOV3, CAOV3, ES2, OV1, 3AO, and HOC 1 A） and one normal ovarian epithelial cell line （T29） using reverse transcription polymerase chain reaction, Western blotting, and flow cytolnetry. Alter inducing PDCD5 induction in SKOV3 cells or treating this cell line with taxol or doxorubicin （either alone or combined）, apoptosis was measured by Annexin V-FITC/propidium iodide staining. Correlations between PDCD5 protein expression and pathological features, histological grade, FIGO stage, effective cytoreductive surgery, and serum cancer antigen-125 values were evaluated in patients with ovarian cancer. Results： PDCD5 mRNA and protein expression were downregulated in ovarian cancer cells. Recombinant human PDCD5 increased doxorubicin-induced apoptosis in SKOV3 cells （15.96 ± 2.07%, vs. 3.17 ± 1.45% in controls）. In patients with ovarian cancer, PDCD5 expression was inversely correlated with FIGO stage, pathological grade, and patient survival （P 〈 0.05, R = 0.7139 for survival）. Conclusions： PDCD5 expression is negatively correlated with disease progression and stage in ovarian cancer. Therefore, measuring PDCD5 expression may be a good method of determining the prognosis of ovarian cancer patients.
文摘The primary aim of the present study was to investigate the overexpression of the rice （Oryza sativa L.） programmed cell death 5 （OsPDCD5） gene in rice plant. Constitutive expression of OsPDCD5 from the cauliflower mosaic virus （CaMV） 35S promoter induced programmed cell death （PCD） in transgenic rice. Programmed cell death was accompanied by typical features, including inhibition of developmental growth, a reduction of fresh weight, degradation of total protein content, and fragmentation of genomic DNA. These results suggest that OsPDCD5 plays an essential role in the regulation of PCD in rice plants.
文摘目的:分析新凋亡促进因子-程序化细胞死亡分子5(programmed cell death 5,PDCD5)在肝细胞癌(hepatocellular carcinoma,HCC)发生发展中的作用.方法:用免疫组织化学法(immunohisto-chemistry,IHC)检测40例HCC及其癌旁组织(包括24例肝硬化和16例慢性肝炎)中的PDCD5和Fas蛋白表达.用等级资料Kruskal-WallisH检验方法进行统计学分析,并用Spearman's等级资料的相关分析比较PDCD5和Fas的表达差异.结果:PDCD5在肝癌组织中多呈阴性表达,在癌旁肝组织中表达增加.肝癌及其癌旁肝硬化肝炎各组间PDCD5表达具有显著性差异(χ2=46.03,P=0.000).Fas在肝癌组织及其癌旁肝硬化或慢性肝炎组织中的表达分布与PDCD5相似,各组间Fas表达有显著性差异(χ2=24.45P=0.000).PDCD5与Fas的相关性分析结果显示,两者呈正相关(r=0.839,P=0.001).结论:PDCD5是HCC发生、发展过程中的一个重要凋亡调控因子.
