Chemokine receptors CXCR4 and CCR5 are indispensable co-receptors for HIV-1 entry into host cells. In our previous study, we identified that dopamine receptor-interacting protein 78（DRi P78） and Na＋-H＋ exchanger r...Chemokine receptors CXCR4 and CCR5 are indispensable co-receptors for HIV-1 entry into host cells. In our previous study, we identified that dopamine receptor-interacting protein 78（DRi P78） and Na＋-H＋ exchanger regulatory factor 1（NHERF1） are the CXCR4 and CCR5 homo- or hetero-dimerinteracting proteins. DRi P78 and NHERF1 are able to influence the co-receptor internalization and intracellular trafficking. Over-expression of NHERF1 affects the ligands or HIV-1 gp120-induced CCR5 internalization and HIV-1 production. It is reasonable to speculate that DRi P78 and NHERF1, as well as the signaling pathways involved in viral replication, would probably affect HIV-1 replication through regulating the co-receptors. In this present study, we designed two short hairpin RNAs（sh RNAs） targeting the DRi P78 and NHERF1, respectively, and constructed the p Lenti6/BLOCK-i T-DEST lentiviral plasmids expressing DRi P78 or NHERF1 sh RNA. The packaged lentiviruses were used to transduce the widely-applied HIV-1 model cell line GHOST（3）. Then, cells with stable knockdown were established through selecting transduced cells with Blasticidin. This study, for the first time, reported the establishment of the GHOST（3） with DRi P78 and NHERF1 knockdown, which is the first stable cell line with HIV-1 co-receptor-interacting molecular defects.展开更多
目的:观察Survivin sh RNA、结肠腺瘤息肉易感基因(adenomatous polyposis coli,APC)片段联合对HT-29细胞Survivin表达及细胞增殖的影响.方法:构建Survivin sh RNA慢病毒载体、A P C有效片段慢病毒载体,对H T-29细胞分别采用单慢病毒载...目的:观察Survivin sh RNA、结肠腺瘤息肉易感基因(adenomatous polyposis coli,APC)片段联合对HT-29细胞Survivin表达及细胞增殖的影响.方法:构建Survivin sh RNA慢病毒载体、A P C有效片段慢病毒载体,对H T-29细胞分别采用单慢病毒载体侵染及联合侵染.实验分阴性对照组、空载组、sh RNA组、APC组、sh RNA+APC联合组,对侵染48 h后的HT-29细胞进行real-time PCR、Western blot及CCK8细胞增殖检测,检测Survivin m RNA、蛋白表达水平及对细胞增殖的影响.结果:(1)sh RNA+APC联合组与其余各组相比,Survivin m RNA表达量显著下降(P<0.05);(2)s h R N A+A P C联合组与其余各组相比,其Survivin蛋白抑制率明显高于其余各组(P<0.05);(3)sh RNA+APC联合组与其余各组相比,细胞增殖速度低于其余各组(P<0.05).结论:Survivin sh RNA与APC片段联合能抑制HT-29细胞内Survivin m RNA及蛋白的表达,同时能够抑制细胞增殖能力,并且优于单个基因侵染.展开更多
Current studies have demonstrated that SLC38A1 proteins play a causal role in neoplastic cell transformation. The twofold aim of this study was to provide insight into whether a variance in the expression of SLC38A1 e...Current studies have demonstrated that SLC38A1 proteins play a causal role in neoplastic cell transformation. The twofold aim of this study was to provide insight into whether a variance in the expression of SLC38A1 exists between human colorectal cancer and healthy human tissues and to determine how silencing or overexpressing the SLC38A1 gene could affect the proliferation, viability and migration of colorectal cancer cells. Immunohistochemical staining was used to analyze the expression of SLC38A1 in colorectal cancer tissues and adjacent normal mucosa in 77 patients who underwent surgical resection. The expression of SLC38A1 in colorectal cancer tissues and cell lines was detected using RT-PCR and Western blotting. Two colorectal cancer cell lines SW480 and HCT116 were used to examine whether silencing SLC38A1 with si RNA and overexpressing SLC38A1 with sh RNA could affect cell viability and migration. As a result, the SLC38A1 protein was very low or undetectable in the normal colon mucosa. In contrast, strong staining of SLC38A1 protein was found in the cytoplasm in 79.2% colorectal cancer samples. More pronounced SLC38A1 expression in colorectal cancer tissues was significantly associated with tumor node metastasis（TNM） stage. Inhibition of SLC38A1 reduced tumour growth and suppressed proliferation and migration of SW480 cells. In contrast, overexpression of SLC38A1 had the opposite effects on HCT116 cells. SLC38A1 is overexpressed in colorectal cancer, which suggests that it is associated with tumour progression. These results encourage the exploration of SLC38A1 as a target for intervention in colorectal cancer.展开更多
目的研究RACK1基因沉默对A549细胞生物学行为的影响,探究其对VEGF、Bcl-2表达的影响。方法转染RACK1 sh RNA至A549细胞,分别设稳定转染的实验组、阴性对照组和空白对照组。Western blot检测各组细胞RACK1、VEGF、Bcl-2的表达,平板克隆...目的研究RACK1基因沉默对A549细胞生物学行为的影响,探究其对VEGF、Bcl-2表达的影响。方法转染RACK1 sh RNA至A549细胞,分别设稳定转染的实验组、阴性对照组和空白对照组。Western blot检测各组细胞RACK1、VEGF、Bcl-2的表达,平板克隆实验检测各组细胞的增殖情况,划痕愈合实验观察细胞运动迁移的改变,流式细胞术分析细胞凋亡率的变化。结果实验组细胞增殖能力下降,迁移能力减弱,凋亡率增高,VEGF、Bcl-2表达下调(P<0.05)。结论 RACK1基因沉默能抑制A549细胞的增殖和迁移,诱导其凋亡,下调VEGF、Bcl-2的表达。展开更多
基金supported by the Science and Technology Planning Project of Guangdong Province of China（2012B031800267）the Natural Science Foundation of Guangdong Province of China（S2013010011860）the National Natural Science Foundation of China（31200130 and 81371812）
文摘Chemokine receptors CXCR4 and CCR5 are indispensable co-receptors for HIV-1 entry into host cells. In our previous study, we identified that dopamine receptor-interacting protein 78（DRi P78） and Na＋-H＋ exchanger regulatory factor 1（NHERF1） are the CXCR4 and CCR5 homo- or hetero-dimerinteracting proteins. DRi P78 and NHERF1 are able to influence the co-receptor internalization and intracellular trafficking. Over-expression of NHERF1 affects the ligands or HIV-1 gp120-induced CCR5 internalization and HIV-1 production. It is reasonable to speculate that DRi P78 and NHERF1, as well as the signaling pathways involved in viral replication, would probably affect HIV-1 replication through regulating the co-receptors. In this present study, we designed two short hairpin RNAs（sh RNAs） targeting the DRi P78 and NHERF1, respectively, and constructed the p Lenti6/BLOCK-i T-DEST lentiviral plasmids expressing DRi P78 or NHERF1 sh RNA. The packaged lentiviruses were used to transduce the widely-applied HIV-1 model cell line GHOST（3）. Then, cells with stable knockdown were established through selecting transduced cells with Blasticidin. This study, for the first time, reported the establishment of the GHOST（3） with DRi P78 and NHERF1 knockdown, which is the first stable cell line with HIV-1 co-receptor-interacting molecular defects.
文摘目的:观察Survivin sh RNA、结肠腺瘤息肉易感基因(adenomatous polyposis coli,APC)片段联合对HT-29细胞Survivin表达及细胞增殖的影响.方法:构建Survivin sh RNA慢病毒载体、A P C有效片段慢病毒载体,对H T-29细胞分别采用单慢病毒载体侵染及联合侵染.实验分阴性对照组、空载组、sh RNA组、APC组、sh RNA+APC联合组,对侵染48 h后的HT-29细胞进行real-time PCR、Western blot及CCK8细胞增殖检测,检测Survivin m RNA、蛋白表达水平及对细胞增殖的影响.结果:(1)sh RNA+APC联合组与其余各组相比,Survivin m RNA表达量显著下降(P<0.05);(2)s h R N A+A P C联合组与其余各组相比,其Survivin蛋白抑制率明显高于其余各组(P<0.05);(3)sh RNA+APC联合组与其余各组相比,细胞增殖速度低于其余各组(P<0.05).结论:Survivin sh RNA与APC片段联合能抑制HT-29细胞内Survivin m RNA及蛋白的表达,同时能够抑制细胞增殖能力,并且优于单个基因侵染.
基金supported in part by grants from National Natural Science Foundation of China(No.81072152)Research Foundation of Health and Family Planning Commission of Hubei Province(No.WJ2015MA010)+1 种基金Natural Science Foundation of Hubei Province(No.2015CFA027)Clinical Medical Research Center of Peritoneal Cancer of Wuhan(No.2015060911020462)
文摘Current studies have demonstrated that SLC38A1 proteins play a causal role in neoplastic cell transformation. The twofold aim of this study was to provide insight into whether a variance in the expression of SLC38A1 exists between human colorectal cancer and healthy human tissues and to determine how silencing or overexpressing the SLC38A1 gene could affect the proliferation, viability and migration of colorectal cancer cells. Immunohistochemical staining was used to analyze the expression of SLC38A1 in colorectal cancer tissues and adjacent normal mucosa in 77 patients who underwent surgical resection. The expression of SLC38A1 in colorectal cancer tissues and cell lines was detected using RT-PCR and Western blotting. Two colorectal cancer cell lines SW480 and HCT116 were used to examine whether silencing SLC38A1 with si RNA and overexpressing SLC38A1 with sh RNA could affect cell viability and migration. As a result, the SLC38A1 protein was very low or undetectable in the normal colon mucosa. In contrast, strong staining of SLC38A1 protein was found in the cytoplasm in 79.2% colorectal cancer samples. More pronounced SLC38A1 expression in colorectal cancer tissues was significantly associated with tumor node metastasis（TNM） stage. Inhibition of SLC38A1 reduced tumour growth and suppressed proliferation and migration of SW480 cells. In contrast, overexpression of SLC38A1 had the opposite effects on HCT116 cells. SLC38A1 is overexpressed in colorectal cancer, which suggests that it is associated with tumour progression. These results encourage the exploration of SLC38A1 as a target for intervention in colorectal cancer.
文摘目的研究RACK1基因沉默对A549细胞生物学行为的影响,探究其对VEGF、Bcl-2表达的影响。方法转染RACK1 sh RNA至A549细胞,分别设稳定转染的实验组、阴性对照组和空白对照组。Western blot检测各组细胞RACK1、VEGF、Bcl-2的表达,平板克隆实验检测各组细胞的增殖情况,划痕愈合实验观察细胞运动迁移的改变,流式细胞术分析细胞凋亡率的变化。结果实验组细胞增殖能力下降,迁移能力减弱,凋亡率增高,VEGF、Bcl-2表达下调(P<0.05)。结论 RACK1基因沉默能抑制A549细胞的增殖和迁移,诱导其凋亡,下调VEGF、Bcl-2的表达。
