Prostatic basal cell is thought to play a pivotal role in hyperplastic change or carcinogenesis of prostate by their proliferation and stem cell transformation. We investigated stem cell transformation of basal cell h...Prostatic basal cell is thought to play a pivotal role in hyperplastic change or carcinogenesis of prostate by their proliferation and stem cell transformation. We investigated stem cell transformation of basal cell hyperplasia observed at biopsy specimens after High Intensity Focused Ultrasound (HIFU) therapy for early stage prostate cancer. Patients and Methods: Basal cell hyperplasia was observed at biopsy specimens in two patients after HIFU therapy. Of these patients, one showed cancer recurrence. Specimens were studied with usual HE, and immunohistochemical studies for prostate specific antigen (PSA), stem cell markers such as CD44, CD117 (c-kit), CD133 and Vimentin. Results: Both basal cell hyperplasia cases indicated PSA (-), CD44 (++), CD117 (-), Vimentin (-) and one specimen showed CD133 (++). Basal cell hyperplasia was presumed to appear during the regeneration process of normal prostate tissue after HIFU therapy, when basal cell proliferated and transformed to acinal cells through epithelial to mesenchymal transition.展开更多
The purpose of this study is to characterize the re-epithelialization of wound healing in canine prostatic urethra and to evaluate the effect of this re-epithelialization way after two-micron laser resection of the pr...The purpose of this study is to characterize the re-epithelialization of wound healing in canine prostatic urethra and to evaluate the effect of this re-epithelialization way after two-micron laser resection of the prostate （TmLRP）. TmLRP and partial bladder neck mucosa were performed in 15 healthy adult male crossbred canines. Wound specimens were harvested at 3 days, and 1, 2, 3, and 4 weeks after operation, respectively. The histopathologic characteristics were observed by hematoxylin and eosin staining. The expression of cytokeratin 14 （CK14）, CK5, CK18, synaptophysin （Syn）, chromogranin A （CgA）, uroplakin, transforming growth factor-β1 （TGF-β1）, and TGF-β type Ⅱ receptor in prostatic urethra wound were examined by immunohistochemistry and real-time polymerase chain reaction, respectively. Van Gieson staining was performed to determine the expression of collagen fibers in prostatic urethra and bladder neck would. The results showed that the re-epithelialization of the prostatic urethra resulted from the mobilization of proliferating epithelial cells from residual prostate tissue under the wound. The proliferating cells expressed CK14, CK5, but not CK18, Syn, and CgA and re-epithelialize expressed uroplakin since 3 weeks. There were enhanced TGF-β1 and TGF-β type Ⅱ receptor expression in proliferating cells and regenerated cells, which correlated with specific phases of re-epithelialization. Compared with the re-epithelialization of the bladder neck, re-epithelialization of canine prostatic urethra was faster, and the expression of collagen fibers was relatively low. In conclusion, re-epithelialization in canine prostatic urethra resulted from prostate basal cells after TmLRP and this re-epithelialization way may represent the ideal healing method from anatomic repair to functional recovery after injury.展开更多
文摘Prostatic basal cell is thought to play a pivotal role in hyperplastic change or carcinogenesis of prostate by their proliferation and stem cell transformation. We investigated stem cell transformation of basal cell hyperplasia observed at biopsy specimens after High Intensity Focused Ultrasound (HIFU) therapy for early stage prostate cancer. Patients and Methods: Basal cell hyperplasia was observed at biopsy specimens in two patients after HIFU therapy. Of these patients, one showed cancer recurrence. Specimens were studied with usual HE, and immunohistochemical studies for prostate specific antigen (PSA), stem cell markers such as CD44, CD117 (c-kit), CD133 and Vimentin. Results: Both basal cell hyperplasia cases indicated PSA (-), CD44 (++), CD117 (-), Vimentin (-) and one specimen showed CD133 (++). Basal cell hyperplasia was presumed to appear during the regeneration process of normal prostate tissue after HIFU therapy, when basal cell proliferated and transformed to acinal cells through epithelial to mesenchymal transition.
文摘The purpose of this study is to characterize the re-epithelialization of wound healing in canine prostatic urethra and to evaluate the effect of this re-epithelialization way after two-micron laser resection of the prostate （TmLRP）. TmLRP and partial bladder neck mucosa were performed in 15 healthy adult male crossbred canines. Wound specimens were harvested at 3 days, and 1, 2, 3, and 4 weeks after operation, respectively. The histopathologic characteristics were observed by hematoxylin and eosin staining. The expression of cytokeratin 14 （CK14）, CK5, CK18, synaptophysin （Syn）, chromogranin A （CgA）, uroplakin, transforming growth factor-β1 （TGF-β1）, and TGF-β type Ⅱ receptor in prostatic urethra wound were examined by immunohistochemistry and real-time polymerase chain reaction, respectively. Van Gieson staining was performed to determine the expression of collagen fibers in prostatic urethra and bladder neck would. The results showed that the re-epithelialization of the prostatic urethra resulted from the mobilization of proliferating epithelial cells from residual prostate tissue under the wound. The proliferating cells expressed CK14, CK5, but not CK18, Syn, and CgA and re-epithelialize expressed uroplakin since 3 weeks. There were enhanced TGF-β1 and TGF-β type Ⅱ receptor expression in proliferating cells and regenerated cells, which correlated with specific phases of re-epithelialization. Compared with the re-epithelialization of the bladder neck, re-epithelialization of canine prostatic urethra was faster, and the expression of collagen fibers was relatively low. In conclusion, re-epithelialization in canine prostatic urethra resulted from prostate basal cells after TmLRP and this re-epithelialization way may represent the ideal healing method from anatomic repair to functional recovery after injury.
