To construct the antisense transforming growth factorβ1 (TGFβ1) gene and investigate the effect of TGFβ1 autocrine loop blockage on the proliferation of osteosarcoma cells. TGFβ1 cDNA was cloned by RT-PCR from hum...To construct the antisense transforming growth factorβ1 (TGFβ1) gene and investigate the effect of TGFβ1 autocrine loop blockage on the proliferation of osteosarcoma cells. TGFβ1 cDNA was cloned by RT-PCR from human osteosarcoma cells (MG-63) and inserted into pcDNA3 to construct an antisense expression vector, which was dubbed pcDNA3-TGFβ1(-). MTT was used to detect the proliferation of osteosarcoma cells transfected by antisense TGFβl gene. Our results showed that the proliferation of the transfected osteosarcoma cells was suppressed markedly. It is concluded that TGFβ1 autocrine loop blockage in osteosarcoma cells could inhibit cell proliferation, which might be helpful for gene therapy of osteosarcoma.展开更多
Objective To evaluate the effects of transforming growth factor β1 (TGF β1) autocrine blockage on proliferation activity and drug sensitivity of osteosarcoma. Methods Northern blot, MTT determination, and 3H thymidi...Objective To evaluate the effects of transforming growth factor β1 (TGF β1) autocrine blockage on proliferation activity and drug sensitivity of osteosarcoma. Methods Northern blot, MTT determination, and 3H thymidine incorporation were used to investigate the effects of antisense TGF β1 gene on osteosarcoma. Results The proliferation of osteosarcoma cells transfected by antisense TGF β1 gene was suppressed markedly, and adriamycin sensitivity was significantly increased. Conclusion Blockage of osteosarcoma cells TGF β1 autocrine loop inhibits cell proliferation and enhances chemother-apy sensitivity.展开更多
Bifunctional regulatory effects of TGF-beta for cell proliferation have been focused. TGFbeta becomes a candidate as the autocrine growth inhibitor to some malignant cells. Evidence has been gained in breast cancer ce...Bifunctional regulatory effects of TGF-beta for cell proliferation have been focused. TGFbeta becomes a candidate as the autocrine growth inhibitor to some malignant cells. Evidence has been gained in breast cancer cell. However, it has not been proved in leukemia and other tumors. Recently, regulations of external TGF-beta on normal and展开更多
Autocrine secretion is a concept which emerges in the search for the molecular basis of malignant tumour. Tumour cells can produce endogenous polypeptide growth factors which act on their producer cells via functional...Autocrine secretion is a concept which emerges in the search for the molecular basis of malignant tumour. Tumour cells can produce endogenous polypeptide growth factors which act on their producer cells via functional external receptors. This process has been termed 'autocrine secretion'. Autocrine hypothesis explains the malignant growth of tumour cells satisfactorily. Transforming growth factor-α (TGF-α)is one of the typical autocrine growth factors. TGF-α can induce the reversible phenotypic transformation of normal rat kidney cells in the presence of other growth factors. This suggests that TGF-α may play an im-展开更多
基金This work was supported by a grant from Chenguang Project of Wuhan(Serial No.20025001028).
文摘To construct the antisense transforming growth factorβ1 (TGFβ1) gene and investigate the effect of TGFβ1 autocrine loop blockage on the proliferation of osteosarcoma cells. TGFβ1 cDNA was cloned by RT-PCR from human osteosarcoma cells (MG-63) and inserted into pcDNA3 to construct an antisense expression vector, which was dubbed pcDNA3-TGFβ1(-). MTT was used to detect the proliferation of osteosarcoma cells transfected by antisense TGFβl gene. Our results showed that the proliferation of the transfected osteosarcoma cells was suppressed markedly. It is concluded that TGFβ1 autocrine loop blockage in osteosarcoma cells could inhibit cell proliferation, which might be helpful for gene therapy of osteosarcoma.
基金Supported by Wuhan Chenguang Project (20025001028)
文摘Objective To evaluate the effects of transforming growth factor β1 (TGF β1) autocrine blockage on proliferation activity and drug sensitivity of osteosarcoma. Methods Northern blot, MTT determination, and 3H thymidine incorporation were used to investigate the effects of antisense TGF β1 gene on osteosarcoma. Results The proliferation of osteosarcoma cells transfected by antisense TGF β1 gene was suppressed markedly, and adriamycin sensitivity was significantly increased. Conclusion Blockage of osteosarcoma cells TGF β1 autocrine loop inhibits cell proliferation and enhances chemother-apy sensitivity.
文摘Bifunctional regulatory effects of TGF-beta for cell proliferation have been focused. TGFbeta becomes a candidate as the autocrine growth inhibitor to some malignant cells. Evidence has been gained in breast cancer cell. However, it has not been proved in leukemia and other tumors. Recently, regulations of external TGF-beta on normal and
文摘Autocrine secretion is a concept which emerges in the search for the molecular basis of malignant tumour. Tumour cells can produce endogenous polypeptide growth factors which act on their producer cells via functional external receptors. This process has been termed 'autocrine secretion'. Autocrine hypothesis explains the malignant growth of tumour cells satisfactorily. Transforming growth factor-α (TGF-α)is one of the typical autocrine growth factors. TGF-α can induce the reversible phenotypic transformation of normal rat kidney cells in the presence of other growth factors. This suggests that TGF-α may play an im-
