BACKGROUND Metabolic reprogramming has been identified as a core hallmark of cancer.Solute carrier family 2 is a major glucose carrier family.It consists of 14 members,and we mainly study solute carrier family 2 membe...BACKGROUND Metabolic reprogramming has been identified as a core hallmark of cancer.Solute carrier family 2 is a major glucose carrier family.It consists of 14 members,and we mainly study solute carrier family 2 member 1(SLC2A1)and solute carrier family 2 member 2(SLC2A2)here.SLC2A1,mainly existing in human erythrocytes,brain endothelial cells,and normal placenta,was found to be increased in hepatocellular carcinoma(HCC),while SLC2A2,the major transporter of the normal liver,was decreased in HCC.AIM To identify if SLC2A1 and SLC2A2 were associated with immune infiltration in addition to participating in the metabolic reprogramming in HCC.METHODS The expression levels of SLC2A1 and SLC2A2 were tested in HepG2 cells,HepG215 cells,and multiple databases.The clinical characteristics and survival data of SLC2A1 and SLC2A2 were examined by multiple databases.The correlation between SLC2A1 and SLC2A2 was analyzed by multiple databases.The functions and pathways in which SLC2A1,SLC2A2,and frequently altered neighbor genes were involved were discussed in String.Immune infiltration levels and immune marker genes associated with SLC2A1 and SLC2A2 were discussed from multiple databases.RESULTS The expression level of SLC2A1 was up-regulated,but the expression level of SLC2A2 was down-regulated in HepG2 cells,HepG215 cells,and liver cancer patients.The expression levels of SLC2A1 and SLC2A2 were related to tumor volume,grade,and stage in HCC.Interestingly,the expression levels of SLC2A1 and SLC2A2 were negatively correlated.Further,high SLC2A1 expression and low SLC2A2 expression were linked to poor overall survival and relapse-free survival.SLC2A1,SLC2A2,and frequently altered neighbor genes played a major role in the occurrence and development of tumors.Notably,SLC2A1 was positively correlated with tumor immune infiltration,while SLC2A2 was negatively correlated with tumor immune infiltration.Particularly,SLC2A2 methylation was positively correlated with lymphocytes.CONCLUSION SLC2A1 and SLC2A2 are independent therapeutic targets for HCC,and they are quintessential marker molecules for predicting and regulating the number and status of immune cells in HCC.展开更多
目的:探讨微小RNA-144-3p(microRNA-144-3p,miR-144-3p)在卵巢癌细胞对顺铂耐药中的作用并分析其作用机制与溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11)和铁死亡是否有关。方法:将miR-144-3p mimic转染入耐顺铂人...目的:探讨微小RNA-144-3p(microRNA-144-3p,miR-144-3p)在卵巢癌细胞对顺铂耐药中的作用并分析其作用机制与溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11)和铁死亡是否有关。方法:将miR-144-3p mimic转染入耐顺铂人卵巢癌细胞株A2780/DDP和SKOV3/DDP后,RT-qPCR法检测miR-144-3p的表达丰度;CCK-8法检测细胞对顺铂的敏感性;集落形成实验测定细胞增殖情况;试剂盒法评估细胞内丙二醛(malondialdehyde,MDA)和谷胱甘肽(glutathione,GSH)的水平;Fe^(2+)探针及活性氧簇(reactive oxygen species,ROS)荧光探针检测细胞内Fe^(2+)含量及ROS水平;透射电子显微镜观察线粒体形态;双萤光素酶报告基因实验验证miR-144-3p与SLC7A11之间的靶向结合。建立耐药细胞株A2780/DDP异种移植瘤模型,体内评估miR-144-3p对肿瘤生长的影响。结果:耐药细胞株A2780/DDP和SKOV3/DDP中的miR-144-3p表达显著低于亲本细胞株A2780和SKOV3(P<0.05)。转染miR-144-3p mimic可抑制细胞增殖,增强耐药细胞株对顺铂的敏感性(P<0.01)。双萤光素酶报告基因实验结果显示SLC7A11是miR-144-3p的作用靶点。过表达SLC7A11可通过铁死亡途径逆转miR-144-3p对细胞增殖及化疗敏感性的作用(P<0.05)。异种移植瘤实验结果表明miR-144-3p可显著抑制瘤体生长,抑制SLC7A11及谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)蛋白表达(P<0.01),提高4-羟基壬烯醛(4-hy-droxynonenal,4-HNE)水平(P<0.01)。结论:miR-144-3p通过靶向SLC7A11而增强耐药卵巢癌细胞对顺铂的敏感性,其作用机制可能涉及铁死亡过程。展开更多
基金Supported by National Natural Science Foundation of China,No.81873112Natural Science Foundation of Hebei Province,No.H2020423009+2 种基金Hundred Outstanding Innovative Talents Support Program of Universities in Hebei Province,No.SLRC2019043Basic Scientific Research Project of Hebei Provincial Colleges and Universities,No.JTZ2020005Scientific and Technological Capability Improvement Project of the Hebei University of Chinese Medicine,No.KTZ2019002.
文摘BACKGROUND Metabolic reprogramming has been identified as a core hallmark of cancer.Solute carrier family 2 is a major glucose carrier family.It consists of 14 members,and we mainly study solute carrier family 2 member 1(SLC2A1)and solute carrier family 2 member 2(SLC2A2)here.SLC2A1,mainly existing in human erythrocytes,brain endothelial cells,and normal placenta,was found to be increased in hepatocellular carcinoma(HCC),while SLC2A2,the major transporter of the normal liver,was decreased in HCC.AIM To identify if SLC2A1 and SLC2A2 were associated with immune infiltration in addition to participating in the metabolic reprogramming in HCC.METHODS The expression levels of SLC2A1 and SLC2A2 were tested in HepG2 cells,HepG215 cells,and multiple databases.The clinical characteristics and survival data of SLC2A1 and SLC2A2 were examined by multiple databases.The correlation between SLC2A1 and SLC2A2 was analyzed by multiple databases.The functions and pathways in which SLC2A1,SLC2A2,and frequently altered neighbor genes were involved were discussed in String.Immune infiltration levels and immune marker genes associated with SLC2A1 and SLC2A2 were discussed from multiple databases.RESULTS The expression level of SLC2A1 was up-regulated,but the expression level of SLC2A2 was down-regulated in HepG2 cells,HepG215 cells,and liver cancer patients.The expression levels of SLC2A1 and SLC2A2 were related to tumor volume,grade,and stage in HCC.Interestingly,the expression levels of SLC2A1 and SLC2A2 were negatively correlated.Further,high SLC2A1 expression and low SLC2A2 expression were linked to poor overall survival and relapse-free survival.SLC2A1,SLC2A2,and frequently altered neighbor genes played a major role in the occurrence and development of tumors.Notably,SLC2A1 was positively correlated with tumor immune infiltration,while SLC2A2 was negatively correlated with tumor immune infiltration.Particularly,SLC2A2 methylation was positively correlated with lymphocytes.CONCLUSION SLC2A1 and SLC2A2 are independent therapeutic targets for HCC,and they are quintessential marker molecules for predicting and regulating the number and status of immune cells in HCC.
文摘目的 利用生物信息学方法预测分析铁死亡相关蛋白SLC7A11的理化、结构及抗原表位等性质并检测SLC7A11与GPX4在热射病(heat stroke,HS)大鼠心肌组织及H9C2心肌细胞中的表达水平,为临床中热射病的治疗提供新的潜在靶点。方法 利用多种工具预测分析SLC7A11蛋白的基本理化性质、信号肽跨膜区和跨膜结构域、蛋白质翻译后的磷酸化位点和N-糖基化位点、二级结构和三级结构、SLC7A11的抗原决定簇及与其相互作用的蛋白。体内实验分为对照组(n=6)、HS组(n=6),体外实验分为对照组、铁死亡抑制剂(Liproxstatin-1)组、HS组和HS+Liproxstatin-1组。利用Western blot和RT-qPCR检测大鼠心肌组织与H9C2心肌细胞中SLC7A11、GPX4 m RNA和蛋白水平。结果 SLC7A11为稳定疏水性蛋白,预测在第29~30位氨基酸存在信号肽,并含12个跨膜螺旋结构;SLC7A11存在40个磷酸化位点、12个N-糖基化位点;SLC7A11蛋白的二、三级结构主要由α螺旋、β-折叠及无规卷曲构成;SLC7A11含有15个抗原决定簇区域;SLC7A11可与GPX4等蛋白相互作用;与对照组比较,HS组大鼠心肌组织中SLC7A11(P<0.05)和GPX4(P<0.01)mRNA和蛋白质表达均降低;Liproxstatin-1组与对照组H9C2心肌细胞中SLC7A11和GPX4 m RNA和蛋白水平比较差异无统计学意义(P均>0.05),HS组SLC7A11与GPX4 m RNA和蛋白水平降低(P均<0.01);与HS组相比,HS+Liproxstatin-1组SLC7A11(P<0.05)和GPX4(P<0.01)m RNA和蛋白水平均有所改善。结论 SLC7A11为疏水性跨膜蛋白,存在大量磷酸化和N-糖基化位点,并含有15个抗原决定簇。HS大鼠心肌组织与高温干预的H9C2心肌细胞中铁死亡相关蛋白SLC7A11与GPX4表达减少,在细胞水平加入铁死亡抑制剂Liproxstatin-1后,SLC7A11与GPX4表达得到改善。
