BACKGROUND Previous cellular studies have demonstrated that elevated expression of Cx43 promotes the degradation of cyclin E1 and inhibits cell proliferation through ubiquitination.Conversely,reduced expression result...BACKGROUND Previous cellular studies have demonstrated that elevated expression of Cx43 promotes the degradation of cyclin E1 and inhibits cell proliferation through ubiquitination.Conversely,reduced expression results in a loss of this capacity to facilitate cyclin E degradation.The ubiquitination and degradation of cyclin E1 may be associated with phosphorylation at specific sites on the protein,with Cx43 potentially enhancing this process by facilitating the phosphorylation of these critical residues.AIM To investigate the correlation between expression of Cx43,SKP1/Cullin1/F-box(SCF)FBXW7,p-cyclin E1(ser73,thr77,thr395)and clinicopathological indexes in colon cancer.METHODS Expression levels of Cx43,SCFFBXW7,p-cyclin E1(ser73,thr77,thr395)in 38 clinical colon cancer samples were detected by immunohistochemistry and were analyzed by statistical methods to discuss their correlations.RESULTS Positive rate of Cx43,SCFFBXW7,p-cyclin E1(Ser73),p-cyclin E1(Thr77)and p-cyclin E1(Thr395)in detected samples were 76.32%,76.32%,65.79%,5.26%and 55.26%respectively.Positive expressions of these proteins were not related to the tissue type,degree of tissue differentiation or lymph node metastasis.Cx43 and SCFFBXW7(r=0.749),p-cyclin E1(Ser73)(r=0.667)and p-cyclin E1(Thr395)(r=0.457),SCFFBXW7 and p-cyclin E1(Ser73)(r=0.703)and p-cyclin E1(Thr395)(0.415)were correlated in colon cancer(P<0.05),and expressions of the above proteins were positively correlated in colon cancer.CONCLUSION Cx43 may facilitate the phosphorylation of cyclin E1 at the Ser73 and Thr195 sites through its interaction with SCFFBXW7,thereby influencing the ubiquitination and degradation of cyclin E1.展开更多
目的:分析人乳头瘤病毒16型E6蛋白(Human papillomavirus type 16 E6 protein,HPV16-E6)、细胞分化抑制因子-1(Inhibitor of intracellular differentiation-1,ID-1)及脯氨酰顺反异构酶1(Prolylcis-trans isomerase1,Pin1)在宫颈癌组织...目的:分析人乳头瘤病毒16型E6蛋白(Human papillomavirus type 16 E6 protein,HPV16-E6)、细胞分化抑制因子-1(Inhibitor of intracellular differentiation-1,ID-1)及脯氨酰顺反异构酶1(Prolylcis-trans isomerase1,Pin1)在宫颈癌组织中的表达及相关性。方法:选择2017年3月至2022年3月莆田学院附属医院收治的宫颈癌65例,所有患者均在我院进行手术切除癌组织,并留取宫颈癌组织和距离癌组织边缘2 cm以上癌旁组织。通过免疫组化法对癌组织、癌旁组织标本HPV16-E6、ID-1、Pin1阳性表达率进行检测。分析HPV16-E6、ID-1、Pin1与临床特征的关系。结果:与癌旁组织相比,癌组织中HPV16-E6、ID-1、Pin1阳性率较高(P<0.05)。HPV16-E6、ID-1、Pin1与肌层浸润深度、组织学分级、临床分期、淋巴结转移、肿瘤直径呈正相关(P<0.05)。将年龄、病理类型等因素控制后,HPV16-E6、ID-1、Pin1与肌层浸润深度、组织学分级、临床分期、淋巴结转移、肿瘤直径相关(P<0.05)。结论:HPV16-E6、ID-1、Pin1在宫颈癌患者中均呈高表达,且HPV16-E6、ID-1、Pin1与宫颈癌患者肌层浸润深度、组织学分级、临床分期、淋巴结转移、肿瘤直径相关。展开更多
基金Supported by Innovative Practice Platform for Undergraduate Students,School of Public Health Xiamen University,No.2021001.
文摘BACKGROUND Previous cellular studies have demonstrated that elevated expression of Cx43 promotes the degradation of cyclin E1 and inhibits cell proliferation through ubiquitination.Conversely,reduced expression results in a loss of this capacity to facilitate cyclin E degradation.The ubiquitination and degradation of cyclin E1 may be associated with phosphorylation at specific sites on the protein,with Cx43 potentially enhancing this process by facilitating the phosphorylation of these critical residues.AIM To investigate the correlation between expression of Cx43,SKP1/Cullin1/F-box(SCF)FBXW7,p-cyclin E1(ser73,thr77,thr395)and clinicopathological indexes in colon cancer.METHODS Expression levels of Cx43,SCFFBXW7,p-cyclin E1(ser73,thr77,thr395)in 38 clinical colon cancer samples were detected by immunohistochemistry and were analyzed by statistical methods to discuss their correlations.RESULTS Positive rate of Cx43,SCFFBXW7,p-cyclin E1(Ser73),p-cyclin E1(Thr77)and p-cyclin E1(Thr395)in detected samples were 76.32%,76.32%,65.79%,5.26%and 55.26%respectively.Positive expressions of these proteins were not related to the tissue type,degree of tissue differentiation or lymph node metastasis.Cx43 and SCFFBXW7(r=0.749),p-cyclin E1(Ser73)(r=0.667)and p-cyclin E1(Thr395)(r=0.457),SCFFBXW7 and p-cyclin E1(Ser73)(r=0.703)and p-cyclin E1(Thr395)(0.415)were correlated in colon cancer(P<0.05),and expressions of the above proteins were positively correlated in colon cancer.CONCLUSION Cx43 may facilitate the phosphorylation of cyclin E1 at the Ser73 and Thr195 sites through its interaction with SCFFBXW7,thereby influencing the ubiquitination and degradation of cyclin E1.
