tailieunhanh - báo cáo hóa học:" Prostate transglutaminase (TGase-4) antagonizes the anti-tumour action of MDA-7/IL-24 in prostate cancer"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Prostate transglutaminase (TGase-4) antagonizes the anti-tumour action of MDA-7/IL-24 in prostate cancer | Ablin et al. Journal of Translational Medicine 2011 9 49 http content 9 1 49 JOURNAL OF TRANSLATIONAL MEDICINE RESEARCH Open Access Prostate transglutaminase TGase-4 antagonizes the anti-tumour action of MDA-7 IL-24 in prostate cancer Richard J Ablin1 Howard G Kynaston2 Malcolm D Mason2 and Wen G Jiang2 Abstract Background Transglutamiase-4 TGase-4 also known as prostate transglutaminase belongs to the TGase family and is uniquely expressed in the prostate gland. The functions of this interesting protein are not clearly defined. In the present study we have investigated an unexpected link between TGase-4 and the melanoma differentiation-associated gene-7 interleukin-24 MDA-7 IL-24 a cytokine known to regulate the growth and apoptosis of certain cancer and immune cells. Methods Frozen sections of normal and malignant human prostate tissues and human prostate cancer PCa cell lines PC-3 and CA-HPV-10 cell lines expressing low and high levels of TGase-4 and recombinant MDA-7 IL-24 rhMDA-7 IL-24 were used. Expression construct for human TGase-4 was generated using a mammalian expression vector with full length human TGase-4 isolated from normal human prostate tissues. PC-3 cells were transfected with expression construct or control plasmid. Stably transfected cells for control transfection and TGase-4 over expression were created. Similarly expression of TGase-4 in CA-HPV-10 cells were knocked down by way of ribozyme transgenes. Single and double immunofluorescence microscopy was used for localization and colocalization of TGase-4 and MDA-7 IL-24 in PCa tissues and cells with antibodies to TGase-4 MDA-7 IL-24 IL-20alpha IL-20beta and IL-22R. Cell-matrix adhesion attachment and migration were by electric cell substrate impedance sensing and growth by in vitro cell growth assay. A panel of small molecule inhibitors including Akt was used to determine signal pathways involving TGase-4 and MDA-7 IL-24. Results We initially noted that MDA-7 .

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