目的:利用反向对接技术以大黄酸为研究对象筛选出大黄酸的炎症靶标蛋白。方法:获取Toll样受体/核因子(4TLR4/NF-κB)、p38促分裂原活化蛋白激酶(P38mitogen-activated protein kinases,P38 MAKP)和Janus激酶-信号转导转录激活因子(Janus...目的:利用反向对接技术以大黄酸为研究对象筛选出大黄酸的炎症靶标蛋白。方法:获取Toll样受体/核因子(4TLR4/NF-κB)、p38促分裂原活化蛋白激酶(P38mitogen-activated protein kinases,P38 MAKP)和Janus激酶-信号转导转录激活因子(Janus kinase 2/signal transducer and activator of transcription 3,JAK2/STAT3)3条炎症通路上的30个蛋白的晶体学结构以及大黄酸的化学结构;利用AutoDockTools对所有晶体学结构进行标准化处理;通过AutoGrid对靶标蛋白的活性位点进行计算;利用AutoDock对大黄酸进行反向对接模拟实验;对得到的对接结果进行筛选,根据对接自由能的高低,筛选出亲和力高的靶蛋白;对筛选得到的靶蛋白进行作用力分析并作图。结果:反向筛选得到3个与大黄酸具有高亲和性的靶蛋白,分别为P38、PI3Kγ、JAK2。结论:大黄酸是通过抑制P38、PI3Kγ、JAK2靶蛋白,进而阻碍炎症信号传递,影响下游蛋白的表达,发挥抗炎作用。展开更多
BACKGROUND Atherosclerosis is a major cause of mortality worldwide and is driven by multiple risk factors,including diabetes,which results in an increased atherosclerotic burden,but the precise mechanisms for the occu...BACKGROUND Atherosclerosis is a major cause of mortality worldwide and is driven by multiple risk factors,including diabetes,which results in an increased atherosclerotic burden,but the precise mechanisms for the occurrence and development of diabetic atheroscerosis have not been fully elucidated.AIM To summarize the potential role of retinol binding protein 4(RBP4) in the pathogenesis of diabetic atheroscerosis,particularly in relation to the RBP4-Janus kinase 2/signal transducer and activator of transcription 3(JAK2/STAT3)signaling pathway.METHODS Male Wistar rats were randomly divided into three groups,including a control group(NC group),diabetic rat group(DM group),and diabetic atherosclerotic rat group(DA group).The contents of total cholesterol(TC), high-density lipoprotein cholesterol(HDL-c), triglycerides(TG), low-density lipoprotein cholesterol(LDLc), fasting insulin(FINS),fasting plasma glucose,and hemoglobin A1 c(HbA1 c)were measured.Moreover,the adipose and serum levels of RBP4,along with the expression levels of JAK2, phosphorylated JAK2(p-JAK2), STAT3,phosphorylated STAT3(p-STAT3), B-cell lymphoma-2(Bcl-2), and Cyclin D1 in aortic tissues were also measured.Besides,homeostasis model assessment of insulin resistance(HOMA-IR) and atherogenic indexes(AI) were calculated.RESULTS Compared with the NC and DM groups,the levels LDL-c,TG,TC,FINS,HOMAIR,RBP4,and AI were upregulated,whereas that of HDL-c was downregulated in the DA group(P <0.05);the mRNA levels of JAK2,STAT3,Cyclin D1,and Bcl-2 in the DA group were significantly increased compared with the NC group and the DM group;P-JAK2,p-JAK2/JAK2 ratio,p-STAT3,p-STAT3/STAT3 ratio,Cyclin D1,and Bcl-2 at protein levels were significantly upregulated in the DA group compared with the NC group and DM group.In addition,as shown by Pearson analysis,serum RBP4 had a positive correlation with TG,TC,LDL-c,FINS,HbA1 C,p-JAK2,p-STAT3,Bcl-2,Cyclin D1,AI,and HOMA-IR but a negative correlation with HDL-c.In addition,multivariable logistic regression analysis showed tha展开更多
文摘目的:利用反向对接技术以大黄酸为研究对象筛选出大黄酸的炎症靶标蛋白。方法:获取Toll样受体/核因子(4TLR4/NF-κB)、p38促分裂原活化蛋白激酶(P38mitogen-activated protein kinases,P38 MAKP)和Janus激酶-信号转导转录激活因子(Janus kinase 2/signal transducer and activator of transcription 3,JAK2/STAT3)3条炎症通路上的30个蛋白的晶体学结构以及大黄酸的化学结构;利用AutoDockTools对所有晶体学结构进行标准化处理;通过AutoGrid对靶标蛋白的活性位点进行计算;利用AutoDock对大黄酸进行反向对接模拟实验;对得到的对接结果进行筛选,根据对接自由能的高低,筛选出亲和力高的靶蛋白;对筛选得到的靶蛋白进行作用力分析并作图。结果:反向筛选得到3个与大黄酸具有高亲和性的靶蛋白,分别为P38、PI3Kγ、JAK2。结论:大黄酸是通过抑制P38、PI3Kγ、JAK2靶蛋白,进而阻碍炎症信号传递,影响下游蛋白的表达,发挥抗炎作用。
基金Supported by National Natural Science Foundation of China,No.81800713 and No.81971264The Project of Natural Science Foundation of Anhui Province,No.1808085QH292Fundamental Research Funds for the Central Universities,No.WK9110000041。
文摘BACKGROUND Atherosclerosis is a major cause of mortality worldwide and is driven by multiple risk factors,including diabetes,which results in an increased atherosclerotic burden,but the precise mechanisms for the occurrence and development of diabetic atheroscerosis have not been fully elucidated.AIM To summarize the potential role of retinol binding protein 4(RBP4) in the pathogenesis of diabetic atheroscerosis,particularly in relation to the RBP4-Janus kinase 2/signal transducer and activator of transcription 3(JAK2/STAT3)signaling pathway.METHODS Male Wistar rats were randomly divided into three groups,including a control group(NC group),diabetic rat group(DM group),and diabetic atherosclerotic rat group(DA group).The contents of total cholesterol(TC), high-density lipoprotein cholesterol(HDL-c), triglycerides(TG), low-density lipoprotein cholesterol(LDLc), fasting insulin(FINS),fasting plasma glucose,and hemoglobin A1 c(HbA1 c)were measured.Moreover,the adipose and serum levels of RBP4,along with the expression levels of JAK2, phosphorylated JAK2(p-JAK2), STAT3,phosphorylated STAT3(p-STAT3), B-cell lymphoma-2(Bcl-2), and Cyclin D1 in aortic tissues were also measured.Besides,homeostasis model assessment of insulin resistance(HOMA-IR) and atherogenic indexes(AI) were calculated.RESULTS Compared with the NC and DM groups,the levels LDL-c,TG,TC,FINS,HOMAIR,RBP4,and AI were upregulated,whereas that of HDL-c was downregulated in the DA group(P <0.05);the mRNA levels of JAK2,STAT3,Cyclin D1,and Bcl-2 in the DA group were significantly increased compared with the NC group and the DM group;P-JAK2,p-JAK2/JAK2 ratio,p-STAT3,p-STAT3/STAT3 ratio,Cyclin D1,and Bcl-2 at protein levels were significantly upregulated in the DA group compared with the NC group and DM group.In addition,as shown by Pearson analysis,serum RBP4 had a positive correlation with TG,TC,LDL-c,FINS,HbA1 C,p-JAK2,p-STAT3,Bcl-2,Cyclin D1,AI,and HOMA-IR but a negative correlation with HDL-c.In addition,multivariable logistic regression analysis showed tha
