Mitochondrial DNA (mtDNA) acts as a bridge between tissue damage and immune activation, triggering innate and adaptive immune responses through multiple signaling pathways. This review introduces the biological characteristics of mtDNA and its release mechanism in solid organ transplantation-related injuries, discusses the immune responses it mediates, and further explores its relationship with graft damage and rejection in different types of solid organ transplantation. By deeply understanding the biological functions of mtDNA, new ideas are expected to be provided for promoting marginal organ repair, optimizing graft monitoring methods, and developing targeted intervention strategies for transplant-related immune responses.

ObjectiveTo study effects of treating acute progressive cerebral infarction by the brain-located mild hypothermia therapy.Methods60 patients were randomly divided into the treatment group (30 cases) and the control group (30 cases). Drugs were used in both groups, and the located mild hypothermia therapy was only applied in the treatment group. After 72 hours and 7 days, the volume of cerebral infarction and the nerve function deficiency (NFD) scores of hemiplegic limbs were compared.ResultsThe volume of cerebral infarction of the treatment group was significantly smaller than that of the control group (P<0.01).There were significant differences on the neurological impairment scores between two groups (P<0.01).Conclusions The brain-located mild hypothermia therapy can reduce hydrocephalus of patients with acute progressive cerebral infarction, and have brain protection. These results provide an important theoretical foundation for the treatment of cerebral infraction with low-temperature therapy.

Objective To investigate the expression of heat shock protein 70(HSP70) and c-fos,the presence of apoptosis and the neuroprotective effects of Cudrania tricuspidata root extrate(Ecr) after focal cerebral ischemic reperfusion in rats.Methods Models of middle cerebral artery occlusion(MCAO) were used in this study.The rats in Ecr pretreated ischemia reperfusion(IR) group were fed with Ecr(2 ml tid) for 5 days before MCAO.The brain specimen were took at different reperfusion times: 1 h,6 h,12 h,24 h,3 d and 7 d after recirculation.Then immunohistochemistry,insitu hybridization,terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling(TUNEL) were used to detect the expression of HSP70,c-fos gene and cell apoptosis in the brains.Positive results were semiquantitatively analyzed.Results IR could induce the expression of HSP70 and c-fos.HSP70 was detected at 6 h following reperfusion and peaked at 24 h both in cortical and basal ganglia regions.c-fos was markedly expressed at 1 h and the level peaked at 6 h in the ischemic hemispheres,and then reduced gradually.The TUNEL positive cells were markedly observed at 6 h.After treatment with Ecr,the positive reaction cells both of HSP70 and c-fos were significantly increased(all(P