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Ferroptosis is a form of programmed cell death driven by iron-dependent lipid peroxidation and is closely associated with a wide range of biological processes, such as aging, immunity, and cancer. Tumor multidrug resistance, especially resistance to apoptosis, has prompted the urgent search for a new antitumor treatment option. Remarkable progress has been made in the study of the role of ferroptosis in antitumor, especially the interaction with immune cells. Studying immunotherapy based on ferroptosis pathways has become a new direction in antitumor research. In this work, we review the role of ferroptosis in immune cells and antitumor immunotherapy to provide new ideas for ferroptosis-mediated antitumor immunotherapy.
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The chemical constituents of Rosa chinensis Jacq were diverse ,mainly including flavonoids ,flavonoid glyco-sides ,phenolic acids ,aromatic oils ,tannins and pigments .Its extract and some chemical constituents had shown multiple phar-macological activities ,such as antitumor ,antifungal ,anti-viral ,anti-oxidation etc ..The advances in the study on chemical com-ponents and pharmacological actions of Rosa chinensis Jacq were reviewed and its application prospect was prospected .
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Endoplasmic reticulum plays a key role in both basic structure formation and function performance of microenviron-ment. Endoplasmic reticulum homeostasis unbalance caused by endoplasmic reticulum stress has become a hot research topic in recent years. This paper focuses on the role of endoplasmic retic-ulum stress in ischemic stroke. Research progress of related sig-naling pathways were reviewed, especially mechanisms through which endoplasmic reticulum stress trigger the inflammatory reac-tion, so as to provide a new research method for prevention of is-chemic stroke.
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Objective To investigate the protective effects and mechanism of TG 6 on myocardial ischemia/reperfusion injury . Methods the protective effects of TG 6 on myocardial ischemia/reperfusion was investigated by setting up models of ischemia and reperfusion of rats induced by ligating the left coronary anterior descending artery in vivo,isolated rat hearts through an improved Lange-ndorff device, and hypoxia /reoxygenation injury of neonatal rat cardiomyocytes , and the serum CK,LDH,T-SOD, MDA were taken as research markers .Results TG6 significantly reduced the myocardial infarct size , decreased the activity of CK and the content of MDA in serum, reduced the activity of LDH, and increased the activity of T-SOD in vivo;TG6 obviously increased the coronary blood flow after low rate perfusion and reperfusion , decreased the content of MDA and the leakage of CK , LDH in myocardial tissue , elevated the activity of T-SOD in vitro of isolated rat hearts;TG6 had no effects on cells in normal growth condition , raised the viability of cardio-myocytes significantly, and reduced the rate of CK leakage and the content of [Ca2+]i obviously in Na2S2O4 treated cells in vitro of neonatal rat cardiomyocytes .Conclusion TG6 could effectively protect myocardial ischemia/reperfusion injury .
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The target of rapamycin ( TOR) , a Ser/Thr protein kinase of PIKKs ( phosphatidylinositol kinase-related kinases ) , is the central factor of a highly conserved signaling pathway in eukaryotes , and regulates cell growth in response to nutrients , hor-mones, and stresses.It controls temporal growth by activating anabolic processes such as translation , ribosome biogenesis , protein syn-thesis, transportation of amino acid and metabolic enzymes .The advances in TOR pathway in the most pervasive human fungal patho-gen Candida albicans.
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Objective To investigate the effect of salidroside on brain edema and neurological function in global cerebral ischemia-reperfusion injury in rats.Methods A total of 100 Sprague Dawley rats were randomly divided into sham operation,ischemia-reperfusion and salidroside 12,24 and 48 mg/kg groups (n =20 in each group),and than redivided into 6 h,24 h,72 h and 7 dsubgroups (n =5 in each subgroup).A rat model of global cerebral ischemia was established using the four-vessel occlusion method.Immediately after modeling,all groups were administered intragastrically for 7 days.The brain water content was quantitated by the wet-dry weight method.The neurological evaluation was performed using a neurological deficit score (NDS).Results After modeling both the ischemia-reperfusion group and all the salidroside groups had significant neurological deficit,and as time went by,it was improved gradually.Compared to the ischemia-reperfusion group at the corresponding time points,neurological deficit in all the salidroside groups was improved significantly (all P ＜ 0.05),and showing a dose-dependent trend.Compared to the salidroside 12 mg/kg and 24 mg/kg groups,neurological deficit in the salidroside 48 mg/kg group was improved significantly at 72 hours and 7 days (all P ＜ 0.05).The brain water contents began to increase at 6 hours after modeling in the the ischemia-reperfusion group and all the salidroside group.They reached the peak at 72 hours,and significantly higher than that in the sham operation group (all P ＜ 0.05).The brain water contents in all the salidroside group were significantly lower than those in the ischemiareperfusion group at 24 and 72 hours after modeling (all P ＜ 0.05) and showing a dosedependent trend.The brain water content in the salidroside 48 mg/kg group was close to that in the sham operation group at 7 days after modeling.Conclusions Salidroside may significantlydecrease brain edema and improve neurological function in global cerebral ischemia-reperfusion injury in rats,and it has a neuroprotective effect.
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Aim: To investigate the analgesic effect of the new triazole compounds Ⅱ_3 and effects on cycloxygen-ase-1(COX-1) as well as cycloxygenase-2( COX-2). Methods: The hot plate and the stretching settings in mice were utilized to study the effects of compounds Ⅱ_3 on acute pain. Radioimmunologic kits were used to assay the contents of PGE_2 in macrophage and 6-keto-PGF_(1α) in endodermis, which represents the activities of COX-2 and COX-1, respectively. Results: CompoundsⅡ_3( 15,30,60 mg/kg) prolonged the pain liminal value and the writ-hing response time in the initial appearance, and reduced the frequency of the writhing response in 15 min after exposure of the mice to glacial acetic acid( P < 0. 05, P < 0. 01). CompoundsⅡ_3, at the concentrations of 1×10 ~(-5),1×10 ~(-6), and 1×10 ~(-7) mol/L, markedly inhibited the production of PGE_2 in macrophage, and also impeded the activity of COX-2 at 1×10 ~(-6) mol/L But the inhibition of 6-keto-PGFla in endodermis using the same settings of compounds Ⅱ_3 was found to be limited. Conclusion: CompoundsⅡ_3 has analgesic effects on the acute pain and selective inhibition on COX-2.
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Objective:To investigate the effect of nimodipine liposomes for injection(NOLI)on focal cerebral ischemia/reperfusion(I/R)injury in rats.Methods:Seventy SD rats were divided into NDLI 1.00 mg/kg,NDLI 0.50 mg/kg,NDLI 0.25 mg/kg,nimodipine 1.00mg/kg,solvent 10 mL/kg,sham-operation and ischemic model groups.The model of middle cerelral artery occlusion in rat was replicated.The behavioral scores in rats were assessed in all groups.The infarct volume,brain water content,biochemical indices of brain homogenate and histology were detected.Results:1he NDLI 1.00mg/kg,0.50 mg/kg and 0.25 mg/kg groups could significantly improve the behavior scores in focal cerebral ischemic rats,reduce the volume of cerebral infarction,decrease the brain water content,improve the activities of Na+,K+-ATPase,Ca2+-ATPase,glutathione(GSH)and superoxide dismutazse(SOD)in brain tissues,reduce conteras of malondialdehyde(MDA),lactic acid(LA)and nitric oxide(NO),and improve histo logical injury.Conclusions:NDLI has the protective effect on focal cerebral ischemia/reperfusion injury in rats.
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Aim To investigate the protective effects of on focal cerebral ischemic-reperfusion(I/R)injury in rats.Methods The model of rat middle cerebral artery occlusion(MCAO)was induced to observe the change of praxiology of rats,infarction percentage,water content,histology of the rat brains.The levels of superoxide dismutase(SOD),malondialdehyde(MDA),reduced glutathione hormone(GSH),Na+,K+-ATPase,Ca2+-ATPase,nitric oxide(NO)were also measured.Results Salidroside at different dosages(24,12,6 mg?kg-1)could obviously decrease cerebral function score,cerebral infarct size and water content,and repair pathological injury of focal cerebral I/R in rats.MDA,LD,NO contents in brain tissue were significantly decreased and activities of GSH,SOD were significantly improved.Na+,K+-ATPase,Ca2+-ATPase at dosages of 24,12 mg?kg-1 were also significantly improved.Conclusion Salidroside had protective effects on injuries of cerebral I/R.
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AIM:To study the effect of Exendin-4 on the glucose tolerance and serum glucose level in normal animals. METHODS: The fasting blood glucose concentration was tested at 0,1,2,3,4 h and 2,4 week after the first administration of Exendin-4 (0.1, 0.3, 0.9 g/kg, 4 weeks, qd) in Wistar rats ,taking insulin as positive control. Before intragastric administration 2.5 g/kg glucose, Exendin-4 (0.2, 0.6, 1.8 g/kg) were subcutaneously injected, then the fasting blood glucose concentration was tested at 0.5, 1, 2 h after the glucose loading. After hypodermic administration of Exendin-4 (0.2, 0.6, 1.8 g/kg), half of the mice were subcutaneously administrated 2.5 g/kg glucose 15 min later, and the insulin was tested at the end of the experiment. RESULTS:Exendin-4 could not significantly change the fasting blood glucose concentration at different times. The fasting blood glucose concentration was significantly decreased after glucose loading by administration Exendin-4. Exendin-4 could increase the serum insulin concentration remarkably after glucose loading and could not change much without glucose loading. CONCLUSION: The results suggest that the blood glucose regulation of Exendin-4 was related to the concentration of glucose.