AIM: To investigate the cytoprotective effects in hepatic ischemia-reperfusion injury, we developed a new formulation of hyaluronic acid(HA) and sphingosine 1-phophate.METHODS: We divided Sprague-Dawley rats into 4 gr...AIM: To investigate the cytoprotective effects in hepatic ischemia-reperfusion injury, we developed a new formulation of hyaluronic acid(HA) and sphingosine 1-phophate.METHODS: We divided Sprague-Dawley rats into 4 groups: control, HA, sphingosine 1-phosphate(S1P), and HA-S1 P. After the administration of each agent, we subjected the rat livers to total ischemia followed by reperfusion. After reperfusion, we performed the following investigations: alanine aminotransferase(ALT), histological findings, Td T-mediated d UTP-biotin nick end labeling(TUNEL) staining, and transmission electron microscopy(TEM). We also investigated the expressionof proteins associated with apoptosis, hepatoprotection, and S1 P accumulation. RESULTS: S1 P accumulated in the HA-S1 P group livers more than S1 P group livers. Serum ALT levels, TUNEL-positive hepatocytes, and expression of cleaved caspase-3 expression, were significantly decreased in the HA-S1 P group. TEM revealed that the liver sinusoidal endothelial cell(LSEC) lining was preserved in the HA-S1 P group. Moreover, the HA-S1 P group showed a greater increase in the HO-1 protein levels compared to the S1 P group.CONCLUSION: Our results suggest that HA-S1 P exhibits cytoprotective effects in the liver through the inhibition of LSEC apoptosis. HA-S1 P is an effective agent for hepatic ischemia/reperfusion injury.展开更多
The aging of society has arrived,and is accompanied by an increase in the absolute numbers of patients with neurological disorders,such as Alzheimer's and Parkinson's diseases(Feigin et al.,2020).Such diseases...The aging of society has arrived,and is accompanied by an increase in the absolute numbers of patients with neurological disorders,such as Alzheimer's and Parkinson's diseases(Feigin et al.,2020).Such diseases,particularly Alzheimer's disease and other forms of dementia,affect not only the patients themselves,but also the people around them,including family members and care givers.As a result,such neurological disorders are thought to carry a larger social burden compared to other diseases.The most critical point in the current situation is that there is no effective treatment despite the fact that the number of patients increase with the aging of the population.展开更多
基金Supported by Ministry of EducationCulture+4 种基金SportsScienceand Technology of JapanKAKENHINo.23390319
文摘AIM: To investigate the cytoprotective effects in hepatic ischemia-reperfusion injury, we developed a new formulation of hyaluronic acid(HA) and sphingosine 1-phophate.METHODS: We divided Sprague-Dawley rats into 4 groups: control, HA, sphingosine 1-phosphate(S1P), and HA-S1 P. After the administration of each agent, we subjected the rat livers to total ischemia followed by reperfusion. After reperfusion, we performed the following investigations: alanine aminotransferase(ALT), histological findings, Td T-mediated d UTP-biotin nick end labeling(TUNEL) staining, and transmission electron microscopy(TEM). We also investigated the expressionof proteins associated with apoptosis, hepatoprotection, and S1 P accumulation. RESULTS: S1 P accumulated in the HA-S1 P group livers more than S1 P group livers. Serum ALT levels, TUNEL-positive hepatocytes, and expression of cleaved caspase-3 expression, were significantly decreased in the HA-S1 P group. TEM revealed that the liver sinusoidal endothelial cell(LSEC) lining was preserved in the HA-S1 P group. Moreover, the HA-S1 P group showed a greater increase in the HO-1 protein levels compared to the S1 P group.CONCLUSION: Our results suggest that HA-S1 P exhibits cytoprotective effects in the liver through the inhibition of LSEC apoptosis. HA-S1 P is an effective agent for hepatic ischemia/reperfusion injury.
文摘The aging of society has arrived,and is accompanied by an increase in the absolute numbers of patients with neurological disorders,such as Alzheimer's and Parkinson's diseases(Feigin et al.,2020).Such diseases,particularly Alzheimer's disease and other forms of dementia,affect not only the patients themselves,but also the people around them,including family members and care givers.As a result,such neurological disorders are thought to carry a larger social burden compared to other diseases.The most critical point in the current situation is that there is no effective treatment despite the fact that the number of patients increase with the aging of the population.
