Stroke-induced immunosuppression is a process that leads to peripheral suppression of the immune system after a stroke and belongs to the central nervous system injury-induced immunosuppressive syndrome.Stroke-induced...Stroke-induced immunosuppression is a process that leads to peripheral suppression of the immune system after a stroke and belongs to the central nervous system injury-induced immunosuppressive syndrome.Stroke-induced immunosuppression leads to increased susceptibility to post-stroke infections,such as urinary tract infections and stroke-associated pneumonia,worsening prognosis.Molecular chaperones are a large class of proteins that are able to maintain proteostasis by directing the folding of nascent polypeptide chains,refolding misfolded proteins,and targeting misfolded proteins for degradation.Various molecular chaperones have been shown to play roles in stroke-induced immunosuppression by modulating the activity of other molecular chaperones,cochaperones,and their associated pathways.This review summarizes the role of molecular chaperones in stroke-induced immunosuppression and discusses new approaches to restore host immune defense after stroke.展开更多
INTRODUCTIONFrom the technical aspect of liver surgery ,control of bleeding during hepatic parenchymal resection is one of the most important procedures in hepatectomy .Pringle,s maneuver ,a temporary cross-clamping ...INTRODUCTIONFrom the technical aspect of liver surgery ,control of bleeding during hepatic parenchymal resection is one of the most important procedures in hepatectomy .Pringle,s maneuver ,a temporary cross-clamping of the hepatoduodnal ligament ,has often been used for this purpose[1],This is the simplest and userul technique to reduce intraoperative blood loss .展开更多
Background:Heatwave events occur more frequently,accompanied by a significant increase in the ambient concentration of fine particulate matter(PM 2.5).Epidemiological and experimental studies have suggested that heat ...Background:Heatwave events occur more frequently,accompanied by a significant increase in the ambient concentration of fine particulate matter(PM 2.5).Epidemiological and experimental studies have suggested that heat stress or PM 2.5 exposure would impair glucose homeostasis and insulin sensitivity.Objective:To explore the joint effects of heat stress and PM 2.5 exposure on glucose metabolism and hepatic insulin pathway.Methods:C57BL/6 mice were randomly divided into filtered air(FA)group,fine particulate matter(PM)group,filtered air combined with heat stress(FH)group,and PM combined with heat stress(PH)group.Mice were exposed to PM for a total of 6 weeks,and heat stress combined with PM exposure was applied at the 5th and 6th weeks via a whole-body exposure system.Systemic glucose homeostasis,insulin sensitivity,and circulating inflammatory cytokines were examined.HSP72 expression and insulin signaling in the liver were measured.Results:Glucose tolerance and insulin sensitivity were impaired in response to heat stress,accompanied by less-ened hepatic GLUT2 expression and inhibited insulin signaling pathway.No synergistic effects of heat stress and PM 2.5 exposure on glucose homeostasis were observed,while heat-upregulated HSP72 expression was attenuated with accumulated TNF𝛼induced by further PM 2.5 exposure.Conclusion:Heat stress combined with PM 2.5 exposure induced TNF𝛼,which could inhibit heat-elevated hepatic HSP72 expression.Elevated circulating TNF𝛼impaired hepatic insulin signaling and GLUT2 expression.Then,glucose homeostasis was perturbed,and insulin action was impaired.展开更多
The influence of exercise at high temperature on adult males＇ routine blood indexes and biochemical indexes and the expression of HSP72 in peripheral blood lymphocytes （PBLs） was studied in order to provide theoret...The influence of exercise at high temperature on adult males＇ routine blood indexes and biochemical indexes and the expression of HSP72 in peripheral blood lymphocytes （PBLs） was studied in order to provide theoretical ground for health supervision of adults receiving exercise at high temperature. 180 adult males were selected and divided into exercise group and control group, in which the exercise group was subdivided into subgroup 1 and subgroup 2 receiving exercise at high temperature in the afternoon and in the morning, respectively. Peripheral venous blood was phle- botomized before and after the exercise to examine routine blood indexes and blood biochemical indexes. The expression levels of HSP72 in PBLs were detected by flow cytometry. The results showed that the routine blood indexes and biochemical indexes in each group were within the range of normal values of male adults. There was no significant difference between each exercise group and control group in indexes before exercise. After exercise, the expression levels of HSP72 in PBLs in exercise groups were higher than those before exercise, and HSP72 expression levels in subgroup 1 were obviously higher than those in subgroup 2 and control group. The contents of ALT, urea, Na＋, Cl-, Ca2＋ and K＋ in subgroups 1 and 2 were lower than those in control group, but CK level was higher than in control group （P〈0.05）. The contents of Na＋ and Clin subgroup 1 were relatively lower than those in subgroup 2 （P〈0.05）. It was concluded that while receiving exercise at high temperature, adult males＇ HSP72 levels in PBLs could be increased and the biochemical indexes changed. Attention should be paid to health supervision to avoid obvious body injuries at high temperature.展开更多
基金the National Natural Science Foundation of China,Nos.82172147(to YL),81571880(to YL),81373147(to YL),30901555(to JZ),30972870(to YL)the Natural Science Foundation of Hunan Province,Nos.2021JJ30900,2016JJ2157(both to YL)。
文摘Stroke-induced immunosuppression is a process that leads to peripheral suppression of the immune system after a stroke and belongs to the central nervous system injury-induced immunosuppressive syndrome.Stroke-induced immunosuppression leads to increased susceptibility to post-stroke infections,such as urinary tract infections and stroke-associated pneumonia,worsening prognosis.Molecular chaperones are a large class of proteins that are able to maintain proteostasis by directing the folding of nascent polypeptide chains,refolding misfolded proteins,and targeting misfolded proteins for degradation.Various molecular chaperones have been shown to play roles in stroke-induced immunosuppression by modulating the activity of other molecular chaperones,cochaperones,and their associated pathways.This review summarizes the role of molecular chaperones in stroke-induced immunosuppression and discusses new approaches to restore host immune defense after stroke.
基金This work was supported partly by Grant 90089102 from the Scientific Research Fund of the Ministry of Education,Japan
文摘INTRODUCTIONFrom the technical aspect of liver surgery ,control of bleeding during hepatic parenchymal resection is one of the most important procedures in hepatectomy .Pringle,s maneuver ,a temporary cross-clamping of the hepatoduodnal ligament ,has often been used for this purpose[1],This is the simplest and userul technique to reduce intraoperative blood loss .
基金supported by Key R&D International Cooperation Projects(Grant No:2019YFE0114500)National Natural Science Foun-dation of China(Grant Nos:81904027,81973001)+1 种基金Medical Health Sci-ence and Technology Project of Zhejiang Provincial Health Commis-sion(Grant Nos:2018KY545,2019KY471,2019KY472)Natural Science Foundation of Zhejiang Chinese Medical University(Grant Nos:2014ZR03,KC201901,2019ZR02,2019ZZ04).
文摘Background:Heatwave events occur more frequently,accompanied by a significant increase in the ambient concentration of fine particulate matter(PM 2.5).Epidemiological and experimental studies have suggested that heat stress or PM 2.5 exposure would impair glucose homeostasis and insulin sensitivity.Objective:To explore the joint effects of heat stress and PM 2.5 exposure on glucose metabolism and hepatic insulin pathway.Methods:C57BL/6 mice were randomly divided into filtered air(FA)group,fine particulate matter(PM)group,filtered air combined with heat stress(FH)group,and PM combined with heat stress(PH)group.Mice were exposed to PM for a total of 6 weeks,and heat stress combined with PM exposure was applied at the 5th and 6th weeks via a whole-body exposure system.Systemic glucose homeostasis,insulin sensitivity,and circulating inflammatory cytokines were examined.HSP72 expression and insulin signaling in the liver were measured.Results:Glucose tolerance and insulin sensitivity were impaired in response to heat stress,accompanied by less-ened hepatic GLUT2 expression and inhibited insulin signaling pathway.No synergistic effects of heat stress and PM 2.5 exposure on glucose homeostasis were observed,while heat-upregulated HSP72 expression was attenuated with accumulated TNF𝛼induced by further PM 2.5 exposure.Conclusion:Heat stress combined with PM 2.5 exposure induced TNF𝛼,which could inhibit heat-elevated hepatic HSP72 expression.Elevated circulating TNF𝛼impaired hepatic insulin signaling and GLUT2 expression.Then,glucose homeostasis was perturbed,and insulin action was impaired.
文摘The influence of exercise at high temperature on adult males＇ routine blood indexes and biochemical indexes and the expression of HSP72 in peripheral blood lymphocytes （PBLs） was studied in order to provide theoretical ground for health supervision of adults receiving exercise at high temperature. 180 adult males were selected and divided into exercise group and control group, in which the exercise group was subdivided into subgroup 1 and subgroup 2 receiving exercise at high temperature in the afternoon and in the morning, respectively. Peripheral venous blood was phle- botomized before and after the exercise to examine routine blood indexes and blood biochemical indexes. The expression levels of HSP72 in PBLs were detected by flow cytometry. The results showed that the routine blood indexes and biochemical indexes in each group were within the range of normal values of male adults. There was no significant difference between each exercise group and control group in indexes before exercise. After exercise, the expression levels of HSP72 in PBLs in exercise groups were higher than those before exercise, and HSP72 expression levels in subgroup 1 were obviously higher than those in subgroup 2 and control group. The contents of ALT, urea, Na＋, Cl-, Ca2＋ and K＋ in subgroups 1 and 2 were lower than those in control group, but CK level was higher than in control group （P〈0.05）. The contents of Na＋ and Clin subgroup 1 were relatively lower than those in subgroup 2 （P〈0.05）. It was concluded that while receiving exercise at high temperature, adult males＇ HSP72 levels in PBLs could be increased and the biochemical indexes changed. Attention should be paid to health supervision to avoid obvious body injuries at high temperature.
