Objective Keshan disease(KD)is a myocardial mitochondrial disease closely related to insufficient selenium(Se)and protein intake.PTEN induced putative kinase 1(PINK1)/Parkin mediated mitochondrial autophagy regulates ...Objective Keshan disease(KD)is a myocardial mitochondrial disease closely related to insufficient selenium(Se)and protein intake.PTEN induced putative kinase 1(PINK1)/Parkin mediated mitochondrial autophagy regulates various physiological and pathological processes in the body.This study aimed to elucidate the relationship between PINK1/Parkin-regulated mitochondrial autophagy and KD-related myocardial injury.Methods A low Se and low protein animal model was established.One hundred Wistar rats were randomly divided into 5 groups(control group,low Se group,low protein group,low Se+low protein group,and corn from KD area group).The JC-1 method was used to detect the mitochondrial membrane potential(MMP).ELISA was used to detect serum creatine kinase MB(CK-MB),cardiac troponin I(cTnI),and mitochondrial-glutamicoxalacetic transaminase(M-GOT)levels.RT-PCR and Western blot analysis were used to detect the expression of PINK1,Parkin,sequestome 1(P62),and microtubule-associated proteins1A/1B light chain 3B(MAP1LC3B).Results The MMP was significantly decreased and the activity of CK-MB,cTnI,and M-GOT significantly increased in each experimental group(low Se group,low protein group,low Se+low protein group and corn from KD area group)compared with the control group(P<0.05 for all).The mRNA and protein expression levels of PINK1,Parkin and MAP1LC3B were profoundly increased,and those of P62 markedly decreased in the experimental groups compared with the control group(P<0.05 for all).Conclusion Low Se and low protein levels exacerbate myocardial damage in KD by affecting the PINK1/Parkin-mediated mitochondrial autophagy pathway.展开更多
目的检测活化的蛋白激酶C受体1(RACK1)、低氧诱导因子1α(HIF-1α)、血管内皮生长因子(VEGF)在宫颈癌组织中的表达并探讨其病理学意义。方法选取2014年6月至2018年6月于本院行手术切除并经病理确诊的85例宫颈癌组织样本及其对应的癌旁组...目的检测活化的蛋白激酶C受体1(RACK1)、低氧诱导因子1α(HIF-1α)、血管内皮生长因子(VEGF)在宫颈癌组织中的表达并探讨其病理学意义。方法选取2014年6月至2018年6月于本院行手术切除并经病理确诊的85例宫颈癌组织样本及其对应的癌旁组织,通过免疫组织化学染色ABC法分别检测RACK1、HIF-1α、VEGF蛋白在宫颈癌组织及其癌旁组织中的表达。结合患者的临床病理资料,分析宫颈癌组织中RACK1、HIF-1α和VEGF蛋白表达与患者年龄及肿瘤直径、浸润深度、病理分级、淋巴结转移之间的关系,并分析三者表达之间的相关性。结果RACK1、HIF-1α、VEGF蛋白在宫颈癌组织中的表达均高于癌旁组织(P均<0.05),阳性表达率分别为81.2%(69/85)、63.5%(54/85)、89.4%(76/85)。RACK1表达与肿瘤浸润深度、病理分级和淋巴结是否转移有关(P均<0.05),HIF-1α和VEGF表达均与肿瘤直径、浸润深度、病理分级及淋巴结是否转移有关(P均<0.05)。RACK1、HIF-1α、VEGF蛋白的表达两两之间呈正相关(RACK1 vs HIF-1α:r=0.523,P=0.0439;RACK1 vs VEGF:r=0.428,P=0.0337;HIF-1αvs VEGF:r=0.689,P=0.0245)。结论RACK1、HIF-1、VEGF蛋白在宫颈癌组织中高表达且三者之间的表达呈正相关,提示其可能在肿瘤的发生、发展过程中起协同作用,可作为判断肿瘤侵袭、转移及预后的重要指标。展开更多
基金supported by the Natural Science Foundation of Heilongjiang Province(No.LH2021H009).
文摘Objective Keshan disease(KD)is a myocardial mitochondrial disease closely related to insufficient selenium(Se)and protein intake.PTEN induced putative kinase 1(PINK1)/Parkin mediated mitochondrial autophagy regulates various physiological and pathological processes in the body.This study aimed to elucidate the relationship between PINK1/Parkin-regulated mitochondrial autophagy and KD-related myocardial injury.Methods A low Se and low protein animal model was established.One hundred Wistar rats were randomly divided into 5 groups(control group,low Se group,low protein group,low Se+low protein group,and corn from KD area group).The JC-1 method was used to detect the mitochondrial membrane potential(MMP).ELISA was used to detect serum creatine kinase MB(CK-MB),cardiac troponin I(cTnI),and mitochondrial-glutamicoxalacetic transaminase(M-GOT)levels.RT-PCR and Western blot analysis were used to detect the expression of PINK1,Parkin,sequestome 1(P62),and microtubule-associated proteins1A/1B light chain 3B(MAP1LC3B).Results The MMP was significantly decreased and the activity of CK-MB,cTnI,and M-GOT significantly increased in each experimental group(low Se group,low protein group,low Se+low protein group and corn from KD area group)compared with the control group(P<0.05 for all).The mRNA and protein expression levels of PINK1,Parkin and MAP1LC3B were profoundly increased,and those of P62 markedly decreased in the experimental groups compared with the control group(P<0.05 for all).Conclusion Low Se and low protein levels exacerbate myocardial damage in KD by affecting the PINK1/Parkin-mediated mitochondrial autophagy pathway.
文摘目的检测活化的蛋白激酶C受体1(RACK1)、低氧诱导因子1α(HIF-1α)、血管内皮生长因子(VEGF)在宫颈癌组织中的表达并探讨其病理学意义。方法选取2014年6月至2018年6月于本院行手术切除并经病理确诊的85例宫颈癌组织样本及其对应的癌旁组织,通过免疫组织化学染色ABC法分别检测RACK1、HIF-1α、VEGF蛋白在宫颈癌组织及其癌旁组织中的表达。结合患者的临床病理资料,分析宫颈癌组织中RACK1、HIF-1α和VEGF蛋白表达与患者年龄及肿瘤直径、浸润深度、病理分级、淋巴结转移之间的关系,并分析三者表达之间的相关性。结果RACK1、HIF-1α、VEGF蛋白在宫颈癌组织中的表达均高于癌旁组织(P均<0.05),阳性表达率分别为81.2%(69/85)、63.5%(54/85)、89.4%(76/85)。RACK1表达与肿瘤浸润深度、病理分级和淋巴结是否转移有关(P均<0.05),HIF-1α和VEGF表达均与肿瘤直径、浸润深度、病理分级及淋巴结是否转移有关(P均<0.05)。RACK1、HIF-1α、VEGF蛋白的表达两两之间呈正相关(RACK1 vs HIF-1α:r=0.523,P=0.0439;RACK1 vs VEGF:r=0.428,P=0.0337;HIF-1αvs VEGF:r=0.689,P=0.0245)。结论RACK1、HIF-1、VEGF蛋白在宫颈癌组织中高表达且三者之间的表达呈正相关,提示其可能在肿瘤的发生、发展过程中起协同作用,可作为判断肿瘤侵袭、转移及预后的重要指标。
