解聚蛋白样金属基质蛋白酶(a disintegrin-like and metalloprotease,ADAMTS)是含有I型血小板结合蛋白基序的多结构域分泌型蛋白。含有Ⅰ型血小板结合蛋白基序的ADAMTS-7为ADAMTS家族重要一员,在心血管疾病中扮演着重要的角色。ADAMTS-...解聚蛋白样金属基质蛋白酶(a disintegrin-like and metalloprotease,ADAMTS)是含有I型血小板结合蛋白基序的多结构域分泌型蛋白。含有Ⅰ型血小板结合蛋白基序的ADAMTS-7为ADAMTS家族重要一员,在心血管疾病中扮演着重要的角色。ADAMTS-7在生理状态下参与机体的生长发育,病理状态ADAMTS-7过表达,通过降解软骨寡聚基质蛋白(COMP)等细胞外基质从而参与多种心血管疾病的发生发展。同时转化生长因子(TGF)-β、miRNA29a/b可以有效的抑制ADAMTS-7的过表达,进而有效抑制心血管疾病的发展。笔者主要对ADAMTS-7的基因结构、蛋白功能及其在心血管涉及的作用机制进行回顾阐述,并展望ADAMTS-7作为治疗心血管疾病新靶点的可能性。展开更多
Objective： To study the effect of dendritic cells loaded with whole tumor antigen on hematogenous micrometastasis of bladder cancer model in hu-PBL-SCID mice. Methods： T24-3 ceil subset was selected from human bladd...Objective： To study the effect of dendritic cells loaded with whole tumor antigen on hematogenous micrometastasis of bladder cancer model in hu-PBL-SCID mice. Methods： T24-3 ceil subset was selected from human bladder transitional cell carcinoma T24 cell line by Boyden chamber system. The SCID mice intraperitoneally injected with 4 × 10^7 hu-PBL and subcutaneously injected with 3 × 10^6 T24-3 cells were named hu-PBL-T24-3-SCID model. Human IgG level in the blood plasma of mice was detected by ELISA, and human CD3^＋, CD4^＋, CD8^＋ T cells in blood and spleen cells of mice were detected by FCM analysis for human immune reconstruction study. Human CK20 mRNA expression in mice peripheral blood was detected by RT-PCR to investigate metastasis of tumor cells. The PBMCs were isolated from human peripheral blood, and were induced into DCs by co-culture with rhGM-CSF and rhlL-4 in vitro. The DC vaccines were produced by co-culturing with whole tumor antigen which was purified through freezing and melting T24-3 cell subset. After T24-3 cells injected into SCID mice for 5 weeks, the mice were treated with DC vaccines. Results： All mice were initially treated at 5th week. The expression of CK20 mRNA in peripheral blood of DC vaccines treated mice was the lowest. There was 2 mice showing CK20 mRNA expression and 3 mice with metastasis tumor in PBS group. MMP-7 mRNA expression in tumor tissues of DC vaccines treated mice was statistically lower than that of PBS group （P 〈 0.01）. Conclusion： DC vaccines have a good effect on hu-PBL-SCID mice bladder cancer model by reducing hematogenous micrometastasis.展开更多
文摘解聚蛋白样金属基质蛋白酶(a disintegrin-like and metalloprotease,ADAMTS)是含有I型血小板结合蛋白基序的多结构域分泌型蛋白。含有Ⅰ型血小板结合蛋白基序的ADAMTS-7为ADAMTS家族重要一员,在心血管疾病中扮演着重要的角色。ADAMTS-7在生理状态下参与机体的生长发育,病理状态ADAMTS-7过表达,通过降解软骨寡聚基质蛋白(COMP)等细胞外基质从而参与多种心血管疾病的发生发展。同时转化生长因子(TGF)-β、miRNA29a/b可以有效的抑制ADAMTS-7的过表达,进而有效抑制心血管疾病的发展。笔者主要对ADAMTS-7的基因结构、蛋白功能及其在心血管涉及的作用机制进行回顾阐述,并展望ADAMTS-7作为治疗心血管疾病新靶点的可能性。
文摘Objective： To study the effect of dendritic cells loaded with whole tumor antigen on hematogenous micrometastasis of bladder cancer model in hu-PBL-SCID mice. Methods： T24-3 ceil subset was selected from human bladder transitional cell carcinoma T24 cell line by Boyden chamber system. The SCID mice intraperitoneally injected with 4 × 10^7 hu-PBL and subcutaneously injected with 3 × 10^6 T24-3 cells were named hu-PBL-T24-3-SCID model. Human IgG level in the blood plasma of mice was detected by ELISA, and human CD3^＋, CD4^＋, CD8^＋ T cells in blood and spleen cells of mice were detected by FCM analysis for human immune reconstruction study. Human CK20 mRNA expression in mice peripheral blood was detected by RT-PCR to investigate metastasis of tumor cells. The PBMCs were isolated from human peripheral blood, and were induced into DCs by co-culture with rhGM-CSF and rhlL-4 in vitro. The DC vaccines were produced by co-culturing with whole tumor antigen which was purified through freezing and melting T24-3 cell subset. After T24-3 cells injected into SCID mice for 5 weeks, the mice were treated with DC vaccines. Results： All mice were initially treated at 5th week. The expression of CK20 mRNA in peripheral blood of DC vaccines treated mice was the lowest. There was 2 mice showing CK20 mRNA expression and 3 mice with metastasis tumor in PBS group. MMP-7 mRNA expression in tumor tissues of DC vaccines treated mice was statistically lower than that of PBS group （P 〈 0.01）. Conclusion： DC vaccines have a good effect on hu-PBL-SCID mice bladder cancer model by reducing hematogenous micrometastasis.
