Venom and ovarian proteins in braconid and ichneumonid wasps play an important role in the successful parasitism of their host, especially for immune suppression immediately after oviposition. In this study, we compar...Venom and ovarian proteins in braconid and ichneumonid wasps play an important role in the successful parasitism of their host, especially for immune suppression immediately after oviposition. In this study, we compared the effect of venom and ovarian proteins collected from the female wasps of Macrocentrus cingulum, a polyembryonic parasitoid of the larvae of Ostriniafunacalis, on the encapsulation capacity of Sephadex A- 25 beads at 4 h and 24 h post-injection both in vivo and in vitro. The results showed that the ovarian proteins significantly interfered with the encapsulation capacity of hemocytes in a dose-dependent manner. Spreading and viability of hemocytes in O. furnacalis was not disrupted by venom and ovarian proteins at various concentrations injected. It seems likely that the ovarian proteins from M. cingulum play a role in suppressing the encapsulation capacity of host hemocytes.展开更多
Background OGR1 was found as a G-protein coupled receptor （GPCR） and proton sensor. Our previous studies have found that OGR1 has inhibitory effect on the metastasis of prostate cancer. In order to investigate the r...Background OGR1 was found as a G-protein coupled receptor （GPCR） and proton sensor. Our previous studies have found that OGR1 has inhibitory effect on the metastasis of prostate cancer. In order to investigate the roles of OGR1 gene in the biological activities of ovarian cancer, we studied the OGR1 effects on ovarian cancer cells, HEY cells.Methods OGR1 gene was transfected into HEY cell, in which endogenous expression is low. OGR1-overxepressed cells and vector-transfected cells were compared in different assays. Western blotting was employed to confirm the high expression level of OGR1. Cell proliferation was determined by MTT assay and cell doubling time assay. Cell migration assay （transwell assay） and cell adhesion assay were performed to determine the migration and adhesion potential of cells. Student＇s t test was employed for statistical analysis.Results Proliferation of OGR1-overexpressed cells was significantly reduced （P ＜0.01）; cell migration was significantly inhibited in the OGR1-transfected cells （P ＜0.01）; cell adhesion to extracellular matrix including fibronectin, vitronectin,collagen Ⅰ/Ⅳ was significantly increased （P ＜0.01）.Conclusions OGR1 expression in human ovarian cancer cells significantly inhibited the cell proliferation and migration,but significantly enhanced cell adhesion to the extracellular matrix. It indicated that OGR1 may be a tumor suppressor gene for ovarian cancer.展开更多
卵巢癌G蛋白偶联受体1 (ovarian cancer G protein-coupled receptor 1, OGR1)亚家族广泛分布于人体组织中,该受体具有质子敏感特性,可以通过受体组氨酸残基感知细胞外pH值变化,对人体细胞功能进行调节。质子感知受体不仅与肿瘤的发生...卵巢癌G蛋白偶联受体1 (ovarian cancer G protein-coupled receptor 1, OGR1)亚家族广泛分布于人体组织中,该受体具有质子敏感特性,可以通过受体组氨酸残基感知细胞外pH值变化,对人体细胞功能进行调节。质子感知受体不仅与肿瘤的发生、免疫系统、神经系统及血管系统等密切相关,还能调节成骨细胞骨形成和破骨细胞骨吸收来影响骨代谢。当骨形成和骨吸收动态平衡被打破以后,会导致骨量异常以及相关骨病的发生。本文就质子感知受体在骨代谢中的作用进行综述。展开更多
基金Acknowledgments We thank X.G. Qiu, and Z.L. Qiu, for culturing insects. This study was supported by the National Natural Science Foundation of China （30370195 30571248）.
文摘Venom and ovarian proteins in braconid and ichneumonid wasps play an important role in the successful parasitism of their host, especially for immune suppression immediately after oviposition. In this study, we compared the effect of venom and ovarian proteins collected from the female wasps of Macrocentrus cingulum, a polyembryonic parasitoid of the larvae of Ostriniafunacalis, on the encapsulation capacity of Sephadex A- 25 beads at 4 h and 24 h post-injection both in vivo and in vitro. The results showed that the ovarian proteins significantly interfered with the encapsulation capacity of hemocytes in a dose-dependent manner. Spreading and viability of hemocytes in O. furnacalis was not disrupted by venom and ovarian proteins at various concentrations injected. It seems likely that the ovarian proteins from M. cingulum play a role in suppressing the encapsulation capacity of host hemocytes.
基金This research was supported by the grants from the National Natural Science Foundation of China （No. 30973175）, Scientific Research Foundation for Returning Scholars of Education Ministry of China （No. 0601-18920006）, Scientific and Technological Research Foundation of Shaanxi Province （No. 2007K09-09）, and the Clinical Research Fundation of First Hospital of Xi＇an Jiaotong University of China.
文摘Background OGR1 was found as a G-protein coupled receptor （GPCR） and proton sensor. Our previous studies have found that OGR1 has inhibitory effect on the metastasis of prostate cancer. In order to investigate the roles of OGR1 gene in the biological activities of ovarian cancer, we studied the OGR1 effects on ovarian cancer cells, HEY cells.Methods OGR1 gene was transfected into HEY cell, in which endogenous expression is low. OGR1-overxepressed cells and vector-transfected cells were compared in different assays. Western blotting was employed to confirm the high expression level of OGR1. Cell proliferation was determined by MTT assay and cell doubling time assay. Cell migration assay （transwell assay） and cell adhesion assay were performed to determine the migration and adhesion potential of cells. Student＇s t test was employed for statistical analysis.Results Proliferation of OGR1-overexpressed cells was significantly reduced （P ＜0.01）; cell migration was significantly inhibited in the OGR1-transfected cells （P ＜0.01）; cell adhesion to extracellular matrix including fibronectin, vitronectin,collagen Ⅰ/Ⅳ was significantly increased （P ＜0.01）.Conclusions OGR1 expression in human ovarian cancer cells significantly inhibited the cell proliferation and migration,but significantly enhanced cell adhesion to the extracellular matrix. It indicated that OGR1 may be a tumor suppressor gene for ovarian cancer.
文摘卵巢癌G蛋白偶联受体1 (ovarian cancer G protein-coupled receptor 1, OGR1)亚家族广泛分布于人体组织中,该受体具有质子敏感特性,可以通过受体组氨酸残基感知细胞外pH值变化,对人体细胞功能进行调节。质子感知受体不仅与肿瘤的发生、免疫系统、神经系统及血管系统等密切相关,还能调节成骨细胞骨形成和破骨细胞骨吸收来影响骨代谢。当骨形成和骨吸收动态平衡被打破以后,会导致骨量异常以及相关骨病的发生。本文就质子感知受体在骨代谢中的作用进行综述。
