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Deng X, Zhu M, Liu Y, Zhang N, Zhang P, Zeng W, Ke M. Suppression of CDK1/Drp1-mediated mitochondrial fission attenuates dexamethasone-induced extracellular matrix deposition in the trabecular meshwork. Antioxid Redox Signal 2024. [PMID: 39096204 DOI: 10.1089/ars.2023.0502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/05/2024]
Abstract
AIMS Deposition of extracellular matrix (ECM) in the trabecular meshwork (TM), as induced by dexamethasone (DEX), is believed to play an important role in the onset of glucocorticoid-induced glaucoma (GIG). Abnormal ECM deposition is a consequence of mitochondrial dysfunction. We aimed to clarify how mitochondrial dysfunction leads to ECM deposition within the TM and to support the development of novel therapeutic strategies. RESULTS In primary human TM cells (pHTMCs) and a dexamethasone acetate-induced murine model of GIG, glucocorticoid administration stimulated both mitochondrial fission and ECM deposition. Excessive mitochondrial fission leads to dysfunction and the overexpression of ECM proteins in pHTMCs. Notably, when pHTMCs were treated with the Drp1 inhibitor Mdivi-1 or with Drp1 siRNA, we observed a marked reduction in DEX-induced mitochondrial damage and ECM proteins in vitro. Furthermore, in C57BL/6J mice, treatment with Mdivi-1 mitigated mitochondrial damage and blocked ECM deposition within the TM. We then employed Ro3306 to inhibit the CDK1-mediated phosphorylation of Drp1 at Ser 616, which restored mitochondrial function and diminished DEX-induced ECM protein expression in pHTMCs. INNOVATION This study illuminates the pathogenic mechanism linking mitochondrial dysfunction to ECM deposition in GIG. Our innovative approach revealed that DEX stimulates mitochondrial fission via CDK1-mediated p-Drp1s616 overexpression, which drives ECM accumulation. It offered a novel therapeutic strategy for reducing ECM protein expression by inhibiting excessive mitochondrial fission and restoring mitochondrial function. CONCLUSION By targeting the CDK1/Drp1-driven mitochondrial fission process, we can counteract DEX-induced ECM deposition in the TM both in vivo and in vitro.
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Affiliation(s)
- Xizhi Deng
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China, Wuhan, China, 430071;
| | - Min Zhu
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei , China;
| | - Yang Liu
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei , China;
| | - Nan Zhang
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei , China;
| | - Pengyu Zhang
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei , China;
| | - Wen Zeng
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei , China;
| | - Min Ke
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei , China;
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Li Y, Wang HB, Cao JL, Zhang WJ, Wang HL, Xu CH, Li KP, Liu Y, Wang JR, Ha HL, Fu SJ, Yang L. Proteomic analysis of mitochondria associated membranes in renal ischemic reperfusion injury. J Transl Med 2024; 22:261. [PMID: 38461333 PMCID: PMC10925013 DOI: 10.1186/s12967-024-05021-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 02/23/2024] [Indexed: 03/11/2024] Open
Abstract
BACKGROUND The mitochondria and endoplasmic reticulum (ER) communicate via contact sites known as mitochondria associated membranes (MAMs). Many important cellular functions such as bioenergetics, mitophagy, apoptosis, and calcium signaling are regulated by MAMs, which are thought to be closely related to ischemic reperfusion injury (IRI). However, there exists a gap in systematic proteomic research addressing the relationship between these cellular processes. METHODS A 4D label free mass spectrometry-based proteomic analysis of mitochondria associated membranes (MAMs) from the human renal proximal tubular epithelial cell line (HK-2 cells) was conducted under both normal (N) and hypoxia/reperfusion (HR) conditions. Subsequent differential proteins analysis aimed to characterize disease-relevant signaling molecules. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis was applied to total proteins and differentially expressed proteins, encompassing Biological Process (BP), Cell Component (CC), Molecular Function (MF), and KEGG pathways. Further, Protein-Protein Interaction Network (PPI) exploration was carried out, leading to the identification of hub genes from differentially expressed proteins. Notably, Mitofusion 2 (MFN2) and BCL2/Adenovirus E1B 19-kDa interacting protein 3(BNIP3) were identified and subsequently validated both in vitro and in vivo. Finally, the impact of MFN2 on MAMs during hypoxia/reoxygenation was explored through regulation of gene expression. Subsequently, a comparative proteomics analysis was conducted between OE-MFN2 and normal HK-2 cells, providing further insights into the underlying mechanisms. RESULTS A total of 4489 proteins were identified, with 3531 successfully quantified. GO/KEGG analysis revealed that MAM proteins were primarily associated with mitochondrial function and energy metabolism. Differential analysis between the two groups showed that 688 proteins in HR HK-2 cells exhibited significant changes in expression level with P-value < 0.05 and HR/N > 1.5 or HR/N < 0.66 set as the threshold criteria. Enrichment analysis of differentially expressed proteins unveiled biological processes such as mRNA splicing, apoptosis regulation, and cell division, while molecular functions were predominantly associated with energy metabolic activity. These proteins play key roles in the cellular responses during HR, offering insights into the IRI mechanisms and potential therapeutic targets. The validation of hub genes MFN2 and BNIP3 both in vitro and vivo was consistent with the proteomic findings. MFN2 demonstrated a protective role in maintaining the integrity of mitochondria associated membranes (MAMs) and mitigating mitochondrial damage following hypoxia/reoxygenation injury, this protective effect may be associated with the activation of the PI3K/AKT pathway. CONCLUSIONS The proteins located in mitochondria associated membranes (MAMs) are implicated in crucial roles during renal ischemic reperfusion injury (IRI), with MFN2 playing a pivotal regulatory role in this context.
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Affiliation(s)
- Yi Li
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
- Department of Anesthesiology, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Hua-Bin Wang
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Jin-Long Cao
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Wen-Jun Zhang
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
- Department of Nephrology, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Hai-Long Wang
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Chang-Hong Xu
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Kun-Peng Li
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Yi Liu
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Ji-Rong Wang
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Hua-Lan Ha
- Department of Nephrology, The First People's Hospital of Lanzhou City, Lanzhou, 730030, Gansu, China
| | - Sheng-Jun Fu
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China
| | - Li Yang
- Department of Urology, Institute of Urology, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, China.
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Zhou D, Zhang Y, Zhu M, Zhang X, Zhang X, Lv J, Tang W, Weng Q, Lin Y, Tong L, Zhong Z, Zhang Y, Zhang M, Lai M, Wang D. mROS‑calcium feedback loop promotes lethal ventricular arrhythmias and sudden cardiac death in early myocardial ischemia. Int J Mol Med 2024; 53:5. [PMID: 37997788 PMCID: PMC10712693 DOI: 10.3892/ijmm.2023.5329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/23/2023] [Indexed: 11/25/2023] Open
Abstract
Lethal ventricular arrhythmia‑sudden cardiac death (LVA‑SCD) occurs frequently during the early stage of myocardial ischemia (MI). However, the mechanism underlying higher LVA‑SCD incidence is still poorly understood. The present study aimed to explore the role of mitochondrial reactive oxygen species (mROS) and Ca2+ crosstalk in promoting LVA‑SCD in early MI. RyR2 S2814A mice and their wild‑type littermates were used. MitoTEMPO was applied to scavenge mitochondrial ROS (mROS). Mice were subjected to severe MI and the occurrence of LVA‑SCD was evaluated. Levels of mitochondrial ROS and calcium (mitoCa2+), cytosolic ROS (cytoROS), and calcium (cytoCa2+), RyR2 Ser‑2814 phosphorylation, CaMKII Met‑282 oxidation, mitochondrial membrane potential (MMP), and glutathione/oxidized glutathione (GSH/GSSG) ratio in the myocardia were detected. Dynamic changes in mROS after hypoxia were investigated using H9c2 cells. Moreover, the myocardial phosphoproteome was analyzed to explore the related mechanisms facilitating mROS‑Ca2+ crosstalk and LVA‑SCD. There was a high incidence (~33.9%) of LVA‑SCD in early MI. Mice who underwent SCD displayed notably elevated levels of myocardial ROS and mROS, and the latter was validated in H9c2 cells. These mice also demonstrated overloads of cytoplasmic and mitochondrial Ca2+, decreased MMP and reduced GSH/GSSG ratio, upregulated RyR2‑S2814 phosphorylation and CaMKII‑M282 oxidation and transient hyperphosphorylation of mitochondrial proteomes in the myocardium. mROS‑specific scavenging by a mitochondria‑targeted antioxidant agent (MitoTEMPO) corrected these SCD‑induced alterations. S2814A mice with a genetically inactivated CaMKII phosphorylation site in RyR2 exhibited decreased overloads in cytoplasmic and mitochondrial Ca2+ and demonstrated similar effects as MitoTEMPO to correct SCD‑induced changes and prevent SCD post‑MI. The data confirmed crosstalk between mROS and Ca2+ in promoting LVA‑SCD. Therefore, we provided evidence that there is a higher incidence of LVA‑SCD in early MI, which may be attributed to a positive feedback loop between mROS and Ca2+ imbalance.
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Affiliation(s)
- Danya Zhou
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
- School of Forensic Medicine, Xinxiang Key Laboratory of Forensic Toxicology, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Ye Zhang
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Mengting Zhu
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Xiaojun Zhang
- Institute of Marine Sciences and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, Guangdong 515041, P.R. China
| | - Xiaojuan Zhang
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Junyao Lv
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Wanting Tang
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Qi Weng
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Yang Lin
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Lejun Tong
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Zhiwei Zhong
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Yanmei Zhang
- Department of Pharmacology, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Mengxuan Zhang
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Minchao Lai
- Department of Neurology, First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Dian Wang
- Department of Forensic Medicine, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
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Wang X, Xing C, Li G, Dai X, Gao X, Zhuang Y, Cao H, Hu G, Guo X, Yang F. The key role of proteostasis at mitochondria-associated endoplasmic reticulum membrane in vanadium-induced nephrotoxicity using a proteomic strategy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 869:161741. [PMID: 36693574 DOI: 10.1016/j.scitotenv.2023.161741] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/14/2023] [Accepted: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Excessive vanadium (V) contamination is an attracting growing concern, which can negatively affect the health of human and ecosystems. But how V causes nephrotoxicity and the role of mitochondria-associated endoplasmic reticulum membrane (MAM) in V-induced nephrotoxicity have remained elusive. To explore the detailed mechanism and screen of potential effective drugs for V-evoked nephrotoxicity, a total of 72 ducks were divided into two groups, control group and V group (30 mg/kg V). Results showed that excessive V damaged kidney function of ducks including causing histopathological abnormality, biochemical makers derangement and oxidative stress. Then MAM of duck kidneys was extracted to investigate differentially expressed proteins (DEPs) under V exposure using proteomics analysis. Around 4240 MAM-localized proteins were identified, of which 412 DEPs showed dramatic changes, including 335 upregulated and 77 downregulated DEPs. On the basis of gene ontology (GO), string and KEGG database analysis, excessive V led to nephrotoxicity primarily by affecting MAM-mediated metabolic pathways, especially elevating the endoplasmic Reticulum (ER) proteostasis related pathway. Further validation analysis of the detected genes and proteins of ER proteostasis related pathway under V poisoning revealed a consistent relationship with proteome analysis, indicating that V disrupted MAM-mediated ER proteostasis. Accordingly, our data proved the critical role for MAM in V-evoked nephrotoxicity, particularly with MAM-mediated ER proteostasis, providing promising insights into the toxicological exploration mechanisms of V.
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Affiliation(s)
- Xiaoyu Wang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China; College of Veterinary Medicine, South China Agriculture University, Guangzhou 510642, Guangdong, PR China
| | - Chenghong Xing
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Guyue Li
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Xueyan Dai
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Xiaona Gao
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Yu Zhuang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Huabin Cao
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Guoliang Hu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Xiaoquan Guo
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China
| | - Fan Yang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, PR China.
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Yang Y, Wu J, Lu W, Dai Y, Zhang Y, Sun X. Mitochondria-associated endoplasmic reticulum membranes dysfunction contributes to PARP-1-dependent cell death under oxidative stress in retinal precursor cells. J Biochem Mol Toxicol 2023; 37:e23303. [PMID: 36639873 DOI: 10.1002/jbt.23303] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 10/20/2022] [Accepted: 01/05/2023] [Indexed: 01/15/2023]
Abstract
Persistent poly (ADP-ribose) polymerase 1 (PARP-1) activation has proven detrimental and can lead to PARP-1-dependent cell death. Mitochondria-associated endoplasmic reticulum (ER) membranes (MAMs) serve as essential hubs for many biological pathways, such as autophagy and mitochondria fission and fusion. This study aimed to alleviate the effects of hydrogen peroxide (H2 O2 )-induced persistent PARP-1 activation and MAM dysregulation by the usage of a PARP-1 inhibitor. Results showed that receptor-interacting protein kinase (RIPK) 1 inhibitor (necrostatin-1) and PARP-1 inhibitor (olaparib) protected retinal precursor cells from H2 O2 -induced death, while a pan-caspase inhibitor (Z-VAD-FMK) failed to protect R28 cells. Olaparib also alleviated H2 O2 -induced MAM dysregulation, as evidenced by decreased VDAC1/ITPR3 interactions and reduced mitochondrial membrane potential collapse. Additionally, olaparib also inhibited H2 O2 -induced autophagy. Inhibiting autophagic flux increased MAM signaling under both normal and oxidative conditions. Furthermore, H2 O2 treatment caused a reduction in the protein level of mitofusin-2 (MFN2) in a dose- and time-dependent manner. Mfn2 knockdown was found to further magnify MAM dysregulation and mitochondrial dysfunction under normal and oxidative conditions. Mfn2 overexpression surprisingly enhanced H2 O2 -induced MAM signaling and failed to rescue H2 O2 -induced mitochondrial dysfunction. These results indicate that MAMs probably serve as a membrane source for oxidative stress-associated autophagy. MAM dysregulation also contributed to H2 O2 -induced PARP-1-dependent cell death. However, more studies are required to decipher the link between the modulation of Mfn2 expression, changes in MAM integrity, and alterations in mitochondrial performances.
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Affiliation(s)
- Yuting Yang
- Department of Ophthalmology & Visual Science, Eye & ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jihong Wu
- Department of Ophthalmology & Visual Science, Eye & ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia, Chinese Academy of Medical Sciences, and Shanghai Key Laboratory of Visual Impairment and Restoration (Fudan University), Shanghai, China
| | - Wei Lu
- Department of Ophthalmology & Visual Science, Eye & ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yiqin Dai
- Department of Ophthalmology & Visual Science, Eye & ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Youjia Zhang
- Department of Ophthalmology & Visual Science, Eye & ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xinghuai Sun
- Department of Ophthalmology & Visual Science, Eye & ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia, Chinese Academy of Medical Sciences, and Shanghai Key Laboratory of Visual Impairment and Restoration (Fudan University), Shanghai, China
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China
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