Pygeum africanum （Tadenan） is a popular phytotherapeutic agent used in the treatment of symptomatic benign prostatic hyperplasia. The active compounds of the drug have not been identified, and determining the plasma...Pygeum africanum （Tadenan） is a popular phytotherapeutic agent used in the treatment of symptomatic benign prostatic hyperplasia. The active compounds of the drug have not been identified, and determining the plasma concentration of the drug is, therefore, not possible. Because there are conflicting results on the efficacy of this drug, we aimed to investigate its effect on prostate cell growth in vitro using human serum collected before and after Pygeum africanum intake. We used primary and organotypic cultures of human prostatic stromal myofibroblast cell line WPMY and prostatic epithelial cell line PNT2. We also used fresh benign prostatic tissue. The serum of a treated man induced decreases in the proliferation of primary cells, organotypic cells and WPMY cells but not PNT2 cells. We also analysed the effect of treated serum on the gene expression profile of WPMY cells. The transcriptome analysis revealed an upregulation of genes involved in multiple tumour suppression pathways and a downregulation of genes involved in inflammation and oxidative-stress pathways. The oral intake of Pygeum africanum resulted in serum levels of active substances that were sufficient to inhibit the proliferation of cultured myofibroblasts prostatic cells. This inhibition was associated with changes in the transcriptome. Asian Journal of Andrology（2012） 14, 499-504; doi：lO.1038/aja.2011.132; published online 26 December 2011展开更多
Objective： To investigate the molecular mechanisms by which Qianliening Capsule （前列宁胶囊,QC） treats benign prostatic hyperplasia （BPH）. Methods： Human prostate stromal cell line WPMY1 was treated with 0, 1, 3...Objective： To investigate the molecular mechanisms by which Qianliening Capsule （前列宁胶囊,QC） treats benign prostatic hyperplasia （BPH）. Methods： Human prostate stromal cell line WPMY1 was treated with 0, 1, 3 and 5 mg/mL of QC for 24, 48 and 72 h, respectively, in the presence of 10 ng/mL basic fibroblast growth factor （bFGF）. The viability of WPMY1 cells was determined by 3（4,5Dimethylthiazol2yl）2,5diphenyltetrazolium bromide （M＇lr） assay. Cell morphology was observed by phasecontrast microscopy. 4＇,6diamidino2phenylindole （DAPI） staining and fluorescence activated cell sorting （FACS） analysis with AnnexinV/propidium iodide （PI） staining were performed to determine cell apoptosis. The loss of mitochondrial membrane potential was examined by FACS analysis with 5,5＇,6,6＇tetrachloro1 ,l＇,3,3＇tetraethylbenzimidazolylcarbocyadne iodide （JC1） staining. Activation of caspase3 and 9 was evaluated by colorimetric assay. The mRNA and protein expression levels of Bcl2 and Bax were measured by reverse transcription polymerase chain reaction （RTPCR） and Western blotting, respectively. Results： Upon bFGF stimulation, the viability of WPMY1 cells was increased to 122%118% compared with the control cells （P〈0.05）. However, treatment with 15 mg/mL of QC for 24, 48 and 72 h decreased the viability of bFGFsUmulated cells to 80%92%, 59%82%, 36%62% compared with the untreated cells （P〈0.05）. In addition, QC treatment reduced WPMY1 cell density in a dosedependent manner. Moreover, QC treatment dosedependently induced the loss of plasma membrane asymmetry, the nuclear condensation and fragmentation, collapse of mitochondrial membrane potential, activation of caspase9 and caspase3, and increase of proapoptotic Bax/Bcl2 ratio. Conclusion： Promoting mitochondriondependent apoptosis of prostate stromal cells might be one of the mechanisms by which QC treats BPH.展开更多
文摘Pygeum africanum （Tadenan） is a popular phytotherapeutic agent used in the treatment of symptomatic benign prostatic hyperplasia. The active compounds of the drug have not been identified, and determining the plasma concentration of the drug is, therefore, not possible. Because there are conflicting results on the efficacy of this drug, we aimed to investigate its effect on prostate cell growth in vitro using human serum collected before and after Pygeum africanum intake. We used primary and organotypic cultures of human prostatic stromal myofibroblast cell line WPMY and prostatic epithelial cell line PNT2. We also used fresh benign prostatic tissue. The serum of a treated man induced decreases in the proliferation of primary cells, organotypic cells and WPMY cells but not PNT2 cells. We also analysed the effect of treated serum on the gene expression profile of WPMY cells. The transcriptome analysis revealed an upregulation of genes involved in multiple tumour suppression pathways and a downregulation of genes involved in inflammation and oxidative-stress pathways. The oral intake of Pygeum africanum resulted in serum levels of active substances that were sufficient to inhibit the proliferation of cultured myofibroblasts prostatic cells. This inhibition was associated with changes in the transcriptome. Asian Journal of Andrology（2012） 14, 499-504; doi：lO.1038/aja.2011.132; published online 26 December 2011
基金Supported by the National Natural Science Foundation of China(No.81072927 and No.81173433)the Natural Science Foundation of Fujian Province of China(No.2010J01199 and No.2009J01169)
文摘Objective： To investigate the molecular mechanisms by which Qianliening Capsule （前列宁胶囊,QC） treats benign prostatic hyperplasia （BPH）. Methods： Human prostate stromal cell line WPMY1 was treated with 0, 1, 3 and 5 mg/mL of QC for 24, 48 and 72 h, respectively, in the presence of 10 ng/mL basic fibroblast growth factor （bFGF）. The viability of WPMY1 cells was determined by 3（4,5Dimethylthiazol2yl）2,5diphenyltetrazolium bromide （M＇lr） assay. Cell morphology was observed by phasecontrast microscopy. 4＇,6diamidino2phenylindole （DAPI） staining and fluorescence activated cell sorting （FACS） analysis with AnnexinV/propidium iodide （PI） staining were performed to determine cell apoptosis. The loss of mitochondrial membrane potential was examined by FACS analysis with 5,5＇,6,6＇tetrachloro1 ,l＇,3,3＇tetraethylbenzimidazolylcarbocyadne iodide （JC1） staining. Activation of caspase3 and 9 was evaluated by colorimetric assay. The mRNA and protein expression levels of Bcl2 and Bax were measured by reverse transcription polymerase chain reaction （RTPCR） and Western blotting, respectively. Results： Upon bFGF stimulation, the viability of WPMY1 cells was increased to 122%118% compared with the control cells （P〈0.05）. However, treatment with 15 mg/mL of QC for 24, 48 and 72 h decreased the viability of bFGFsUmulated cells to 80%92%, 59%82%, 36%62% compared with the untreated cells （P〈0.05）. In addition, QC treatment reduced WPMY1 cell density in a dosedependent manner. Moreover, QC treatment dosedependently induced the loss of plasma membrane asymmetry, the nuclear condensation and fragmentation, collapse of mitochondrial membrane potential, activation of caspase9 and caspase3, and increase of proapoptotic Bax/Bcl2 ratio. Conclusion： Promoting mitochondriondependent apoptosis of prostate stromal cells might be one of the mechanisms by which QC treats BPH.
