Objective:Buyinqianzheng Formula(BYQZF)is clinically employed in traditional Chinese medicine to treat Parkinson's disease(PD)by improving mitochondrial dysfunction.However,the underlying mechanisms by which BYQZF...Objective:Buyinqianzheng Formula(BYQZF)is clinically employed in traditional Chinese medicine to treat Parkinson's disease(PD)by improving mitochondrial dysfunction.However,the underlying mechanisms by which BYQZF affects mitochondrial morphology remain unknown.Therefore,we observed the effects of BYQZF on mitochondria from the perspective of the PINK1/Parkin pathway.Methods:Cell survival rates were assessed by Cell Counting Kit-8 assay.Expression levels of PINK1 and Parkin mRNA were examined by qRT-PCR.Protein expression levels of PINK1,PINK1-Ser228,Parkin,Parkin-Ser65,Drp1,and Drp1-Ser637 were examined by western blotting.PINK1,Parkin,and MitoTracker?Red CMXRos(MTR)were stained by triple-labeled immunofluorescence,and observed under laser confocal microscopy.Results:Cell survival rate,mitochondrial form factor,mean length and number of mitochondrial network branches,mitochondrial activity,m RNA expression levels of PINK1 and Parkin,and protein expression levels of PINK1,Parkin,and Drp1-Ser637 were reduced after 1-methyl-4-phenylpyridinium(MPP^(+))intervention.In contrast,Pearson's correlation coefficients between PINK1 and Parkin,and between Parkin and MTR,as well as protein expression levels of PINK1-Ser228,Parkin-Ser65,and Drp1 increased significantly after MPP^(+) intervention.Treatment with BYQZF increased cell survival rate,mitochondrial form factor,mean length and number of mitochondrial network branches,mitochondrial activity,m RNA expression levels of PINK1 and Parkin,and expression of PINK1,Parkin,and Drp1-Ser637 proteins.Pearson's correlation coefficients between PINK1 and Parkin,and between Parkin and MTR,as well as protein expression levels of PINK1-Ser228,Parkin-Ser65,and Drp1 decreased after BYQZF treatment.Conclusion:These results demonstrate that BYQZF has a protective effect on mitochondrial molecular mechanisms in the PD cell model,and the mechanism is related to the PINK1/Parkin pathway.展开更多
Background:This study will be aimed at investigating the effects of Baihu Renshen decoction(BHRS)on type 2 diabetes rats and on macromolecular enzyme 1(PINK1)/E3 ubiquitin protein ligase(Parkin)pathway.Methods:The exp...Background:This study will be aimed at investigating the effects of Baihu Renshen decoction(BHRS)on type 2 diabetes rats and on macromolecular enzyme 1(PINK1)/E3 ubiquitin protein ligase(Parkin)pathway.Methods:The experiment was divided into four groups:control group,model group,metformin group and BHRS low-dose group and high-dose group.Forty male rats were selected as samples and randomly assigned to at least one test group.Finally,there are 18 rats in each group.Except for the control group,the rats within the different teams got a high-fat diet associate in nursing an intraperitoneal injection of streptozotocin to make a type 2 diabetes mellitus(T2DM)rat model.The organic chemistry and inflammatory indexes of rats in every cluster were analyzed and compared once four weeks of intragastric administration of comparable reagents to review the therapeutic impact of BHRS on T2DM.In addition,we determined the pathological changes of ductal gland tissue of T2DM rats after treatment,and compared the expression of mitochondrial phagocytosis related proteins in ductal gland tissue of rats in each group.Results:FBG,LDL-C,TC,TG,MDA,IL-1,IL-6,TNF-,and mitophagy-related proteins COXIV,P62,VDAC1,and TOM20 were elevated in the model group compared to the control group,while HDL-C,SOD,GSH-Px,and mitophagy-related proteins PINK1,Parkin,and LC3II/I were decreased(P<0.05 or P<0.01).The expressions of FBG,TC,TG,LDL-C,MDA,IL-1,IL-6,TNF-,and mitophagy-related proteins COXIV,P62,VDAC1,and TOM20 were lowered in the BHRS group,while the expressions of HOMA-,HDL-C,SOD,GSH-Px,and mitophagy-related proteins PINK1,Parkin,and LC3II/I were(P<0.05 or P<0.01).After therapy with BHRS,hematoxylin-eosin staining showed that the intensity of pancreatic acinar staining increased,and islet cells became clear boundaries that were,regularly arranged,and with reduced vacuoles reduced.Conclusion:BHRS has a clear therapeutic effect on T2DM,which may be achieved by regulating mitochondrial autophagy through the PINK1/Parkin pathway.展开更多
Objective To investigate the effect and underlying mechanism of Qingguang’an Granules(青光安颗粒剂,QGAG)on mitochondrial autophagy(mitophagy)of retinal ganglion cells(RGCs)in rats with chronic ocular hypertension(COH...Objective To investigate the effect and underlying mechanism of Qingguang’an Granules(青光安颗粒剂,QGAG)on mitochondrial autophagy(mitophagy)of retinal ganglion cells(RGCs)in rats with chronic ocular hypertension(COH).Methods Sixty Sprague Dawley(SD)rats,half males and half females,were randomly assigned to three groups:the control,model,and QGAG(2.5 g/kg)groups,with 20 rats in each group.Rats’model of COH was established by cauterizing episcleral veins in the model group and QGAG group.Three weeks after successful modeling,rats in the QGAG group were intra-gastrically administered with QGAG,while rats in the control group and the model group received an equal dose of normal saline.After three months of intragastric administration,intraocular pressure(IOP)of all rats was measured.The mitophagy was monitored by the immunofluorescence method,the mitochondrial membrane potential was measured using the JC-1 method,and the morphological changes of mitophagy in RGCs were observed by transmission electron microscopy.Meanwhile,rat RGCs were labeled using the fluorescent gold method,and RGCs density in each group was calculated.Moreover,RGCs apoptosis was observed by TdT-mediated dUTP Nick-End Labeling(TUNEL)assay.Finally,the expression levels of Parkin,optineurin,microtubule-associated protein 1 light chain 3-Ⅱ/microtubule-associated protein 1 light chain 3-Ⅰ(LC3-Ⅱ/LC3-Ⅰ),recombinant lysosomal associated membrane protein 1(LAMP1),and B-cell lymphoma-2(Bcl-2)in RGCs were determined by Western blot assay.The corresponding mRNAs were detected through quantitative real-time polymerase chain reaction(qRT-PCR).Results The QGAG reduced IOP in COH rats,and inhibited mitophagy and apoptosis of RGCs(P<0.05).Besides,the QGAG significantly increased the expression levels of Parkin and Bcl-2(P<0.05),and inhibited the expression levels of optineurin,LAMP1,and LC3-Ⅱ/LC3-Ⅰ(P<0.05)in RGCs of COH rats.Conclusion The QGAG can inhibit mitophagy in RGCs of COH rats and show a protective effect against optic nerve damage caused by glaucoma,which may be mediated through the mitophagy ubiquitination via the Parkin/PINK1-related pathway.展开更多
基金the National Natural Science Foundation of China(Grant Nos.81573773 and 81774110)。
文摘Objective:Buyinqianzheng Formula(BYQZF)is clinically employed in traditional Chinese medicine to treat Parkinson's disease(PD)by improving mitochondrial dysfunction.However,the underlying mechanisms by which BYQZF affects mitochondrial morphology remain unknown.Therefore,we observed the effects of BYQZF on mitochondria from the perspective of the PINK1/Parkin pathway.Methods:Cell survival rates were assessed by Cell Counting Kit-8 assay.Expression levels of PINK1 and Parkin mRNA were examined by qRT-PCR.Protein expression levels of PINK1,PINK1-Ser228,Parkin,Parkin-Ser65,Drp1,and Drp1-Ser637 were examined by western blotting.PINK1,Parkin,and MitoTracker?Red CMXRos(MTR)were stained by triple-labeled immunofluorescence,and observed under laser confocal microscopy.Results:Cell survival rate,mitochondrial form factor,mean length and number of mitochondrial network branches,mitochondrial activity,m RNA expression levels of PINK1 and Parkin,and protein expression levels of PINK1,Parkin,and Drp1-Ser637 were reduced after 1-methyl-4-phenylpyridinium(MPP^(+))intervention.In contrast,Pearson's correlation coefficients between PINK1 and Parkin,and between Parkin and MTR,as well as protein expression levels of PINK1-Ser228,Parkin-Ser65,and Drp1 increased significantly after MPP^(+) intervention.Treatment with BYQZF increased cell survival rate,mitochondrial form factor,mean length and number of mitochondrial network branches,mitochondrial activity,m RNA expression levels of PINK1 and Parkin,and expression of PINK1,Parkin,and Drp1-Ser637 proteins.Pearson's correlation coefficients between PINK1 and Parkin,and between Parkin and MTR,as well as protein expression levels of PINK1-Ser228,Parkin-Ser65,and Drp1 decreased after BYQZF treatment.Conclusion:These results demonstrate that BYQZF has a protective effect on mitochondrial molecular mechanisms in the PD cell model,and the mechanism is related to the PINK1/Parkin pathway.
基金the Construction Project of Workshop of Prestigious Chinese Physician Xiu-Hai Su(2022-75).
文摘Background:This study will be aimed at investigating the effects of Baihu Renshen decoction(BHRS)on type 2 diabetes rats and on macromolecular enzyme 1(PINK1)/E3 ubiquitin protein ligase(Parkin)pathway.Methods:The experiment was divided into four groups:control group,model group,metformin group and BHRS low-dose group and high-dose group.Forty male rats were selected as samples and randomly assigned to at least one test group.Finally,there are 18 rats in each group.Except for the control group,the rats within the different teams got a high-fat diet associate in nursing an intraperitoneal injection of streptozotocin to make a type 2 diabetes mellitus(T2DM)rat model.The organic chemistry and inflammatory indexes of rats in every cluster were analyzed and compared once four weeks of intragastric administration of comparable reagents to review the therapeutic impact of BHRS on T2DM.In addition,we determined the pathological changes of ductal gland tissue of T2DM rats after treatment,and compared the expression of mitochondrial phagocytosis related proteins in ductal gland tissue of rats in each group.Results:FBG,LDL-C,TC,TG,MDA,IL-1,IL-6,TNF-,and mitophagy-related proteins COXIV,P62,VDAC1,and TOM20 were elevated in the model group compared to the control group,while HDL-C,SOD,GSH-Px,and mitophagy-related proteins PINK1,Parkin,and LC3II/I were decreased(P<0.05 or P<0.01).The expressions of FBG,TC,TG,LDL-C,MDA,IL-1,IL-6,TNF-,and mitophagy-related proteins COXIV,P62,VDAC1,and TOM20 were lowered in the BHRS group,while the expressions of HOMA-,HDL-C,SOD,GSH-Px,and mitophagy-related proteins PINK1,Parkin,and LC3II/I were(P<0.05 or P<0.01).After therapy with BHRS,hematoxylin-eosin staining showed that the intensity of pancreatic acinar staining increased,and islet cells became clear boundaries that were,regularly arranged,and with reduced vacuoles reduced.Conclusion:BHRS has a clear therapeutic effect on T2DM,which may be achieved by regulating mitochondrial autophagy through the PINK1/Parkin pathway.
基金Regional Fund Project of National Natural Science Foundation of China(81860870)China Postdoctoral Science Foundation(2018M640754)+3 种基金Hunan Natural Science Foundation Project(2020JJ5436)Program of Chinese Medicine Innovative-Backbone Talents of China(Xiang CM[2019]67)Hunan Province“225”Program for Cultivation of High-level Health Talents(Xiang CM[2019]196)Open Fund Project of Hunan Provincial Engineering Technology Research Center for the Prevention and Treatment of Ophthalmology and Otolaryngology Diseases and Visual Function Protection with Chinese Medicine(2018YZD02).
文摘Objective To investigate the effect and underlying mechanism of Qingguang’an Granules(青光安颗粒剂,QGAG)on mitochondrial autophagy(mitophagy)of retinal ganglion cells(RGCs)in rats with chronic ocular hypertension(COH).Methods Sixty Sprague Dawley(SD)rats,half males and half females,were randomly assigned to three groups:the control,model,and QGAG(2.5 g/kg)groups,with 20 rats in each group.Rats’model of COH was established by cauterizing episcleral veins in the model group and QGAG group.Three weeks after successful modeling,rats in the QGAG group were intra-gastrically administered with QGAG,while rats in the control group and the model group received an equal dose of normal saline.After three months of intragastric administration,intraocular pressure(IOP)of all rats was measured.The mitophagy was monitored by the immunofluorescence method,the mitochondrial membrane potential was measured using the JC-1 method,and the morphological changes of mitophagy in RGCs were observed by transmission electron microscopy.Meanwhile,rat RGCs were labeled using the fluorescent gold method,and RGCs density in each group was calculated.Moreover,RGCs apoptosis was observed by TdT-mediated dUTP Nick-End Labeling(TUNEL)assay.Finally,the expression levels of Parkin,optineurin,microtubule-associated protein 1 light chain 3-Ⅱ/microtubule-associated protein 1 light chain 3-Ⅰ(LC3-Ⅱ/LC3-Ⅰ),recombinant lysosomal associated membrane protein 1(LAMP1),and B-cell lymphoma-2(Bcl-2)in RGCs were determined by Western blot assay.The corresponding mRNAs were detected through quantitative real-time polymerase chain reaction(qRT-PCR).Results The QGAG reduced IOP in COH rats,and inhibited mitophagy and apoptosis of RGCs(P<0.05).Besides,the QGAG significantly increased the expression levels of Parkin and Bcl-2(P<0.05),and inhibited the expression levels of optineurin,LAMP1,and LC3-Ⅱ/LC3-Ⅰ(P<0.05)in RGCs of COH rats.Conclusion The QGAG can inhibit mitophagy in RGCs of COH rats and show a protective effect against optic nerve damage caused by glaucoma,which may be mediated through the mitophagy ubiquitination via the Parkin/PINK1-related pathway.
