1
|
Jia H, Zhou LC, Chen YF, Zhang W, Qi W, Wang P, Huang X, Guo JW, Hou WF, Zhang RR, Zhou JJ, Zhang DW. Mitochondria-encoded peptide MOTS-c participates in plasma membrane repair by facilitating the translocation of TRIM72 to membrane. Theranostics 2024; 14:5001-5021. [PMID: 39267782 PMCID: PMC11388074 DOI: 10.7150/thno.100321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2024] [Accepted: 08/06/2024] [Indexed: 09/15/2024] Open
Abstract
Rationale: An impairment of plasma membrane repair has been implicated in various diseases such as muscular dystrophy and ischemia/reperfusion injury. MOTS-c, a short peptide encoded by mitochondria, has been shown to pass through the plasma membrane into the bloodstream. This study determined whether this biological behavior was involved in membrane repair and its underlying mechanism. Methods and Results: In human participants, the level of MOTS-c was positively correlated with the abundance of mitochondria, and the membrane repair molecule TRIM72. In contrast to high-intensity eccentric exercise, moderate-intensity exercise improved sarcolemma integrity and physical performance, accompanied by an increase of mitochondria beneath the damaged sarcolemma and secretion of MOTS-c. Furthermore, moderate-intensity exercise increased the interaction between MOTS-c and TRIM72, and MOTS-c facilitated the trafficking of TRIM72 to the sarcolemma. In vitro studies demonstrated that MOTS-c attenuated membrane damage induced by hypotonic solution, which could be blocked by siRNA-TRIM72, but not AMPK inhibitor. Co-immunoprecipitation study showed that MOTS-c interacted with TRIM72 C-terminus, but not N-terminus. The dynamic membrane repair assay revealed that MOTS-c boosted the trafficking of TRIM72 to the injured membrane. However, MOTS-c itself had negligible effects on membrane repair, which was recapitulated in TRIM72-/- mice. Unexpectedly, MOTS-c still increased the fusion of vesicles with the membrane in TRIM72-/- mice, and dot blot analysis revealed an interaction between MOTS-c and phosphatidylinositol (4,5) bisphosphate [PtdIns (4,5) P2]. Finally, MOTS-c blunted ischemia/reperfusion-induced membrane disruption, and preserved heart function. Conclusions: MOTS-c/TRIM72-mediated membrane integrity improvement participates in mitochondria-triggered membrane repair. An interaction between MOTS-c and plasma lipid contributes to the fusion of vesicles with membrane. Our data provide a novel therapeutic strategy for rescuing organ function by facilitating membrane repair with MOTS-c.
Collapse
Affiliation(s)
- Hong Jia
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
- Western Theater Command Center for Disease Control and Prevention, Lanzhou 730020, China
| | - Lyu-Chen Zhou
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Yong-Feng Chen
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Wei Zhang
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Wei Qi
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Peng Wang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Xiao Huang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Jian-Wei Guo
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Wai-Fang Hou
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Ran-Ran Zhang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Jing-Jun Zhou
- Department of Physiology, Southwest Medical University, Luzhou 646000, China
| | - Da-Wei Zhang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| |
Collapse
|
2
|
Chen Q, Li L, Samidurai A, Thompson J, Hu Y, Willard B, Lesnefsky EJ. Acute endoplasmic reticulum stress-induced mitochondria respiratory chain damage: The role of activated calpains. FASEB J 2024; 38:e23404. [PMID: 38197290 PMCID: PMC11032170 DOI: 10.1096/fj.202301158rr] [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: 06/09/2023] [Revised: 11/19/2023] [Accepted: 12/19/2023] [Indexed: 01/11/2024]
Abstract
The induction of acute endoplasmic reticulum (ER) stress damages the electron transport chain (ETC) in cardiac mitochondria. Activation of mitochondria-localized calpain 1 (CPN1) and calpain 2 (CPN2) impairs the ETC in pathological conditions, including aging and ischemia-reperfusion in settings where ER stress is increased. We asked if the activation of calpains causes the damage to the ETC during ER stress. Control littermate and CPNS1 (calpain small regulatory subunit 1) deletion mice were used in the current study. CPNS1 is an essential subunit required to maintain CPN1 and CPN2 activities, and deletion of CPNS1 prevents their activation. Tunicamycin (TUNI, 0.4 mg/kg) was used to induce ER stress in C57BL/6 mice. Cardiac mitochondria were isolated after 72 h of TUNI treatment. ER stress was increased in both control littermate and CPNS1 deletion mice with TUNI treatment. The TUNI treatment activated both cytosolic and mitochondrial CPN1 and 2 (CPN1/2) in control but not in CPNS1 deletion mice. TUNI treatment led to decreased oxidative phosphorylation and complex I activity in control but not in CPNS1 deletion mice compared to vehicle. The contents of complex I subunits, including NDUFV2 and ND5, were decreased in control but not in CPNS1 deletion mice. TUNI treatment also led to decreased oxidation through cytochrome oxidase (COX) only in control mice. Proteomic study showed that subunit 2 of COX was decreased in control but not in CPNS1 deletion mice. Our results provide a direct link between activation of CPN1/2 and complex I and COX damage during acute ER stress.
Collapse
Affiliation(s)
- Qun Chen
- Department of Internal Medicine, Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Ling Li
- Proteomics Core, Cleveland Clinic, Cleveland, Ohio, USA
| | - Arun Samidurai
- Department of Internal Medicine, Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Jeremy Thompson
- Department of Internal Medicine, Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Ying Hu
- Department of Internal Medicine, Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA
| | | | - Edward J. Lesnefsky
- Department of Internal Medicine, Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, Virginia, USA
- Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia, USA
- Richmond Department of Veterans Affairs Medical Center, Richmond, Virginia, USA
| |
Collapse
|
3
|
Zhang RR, Zhang JL, Li Q, Zhang SM, Gu XM, Niu W, Zhou JJ, Zhou LC. SEVERE BURN-INDUCED MITOCHONDRIAL RECRUITMENT OF CALPAIN CAUSES ABERRANT MITOCHONDRIAL DYNAMICS AND HEART DYSFUNCTION. Shock 2023; 60:255-261. [PMID: 37278996 PMCID: PMC10476594 DOI: 10.1097/shk.0000000000002159] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/12/2023] [Accepted: 05/31/2023] [Indexed: 06/07/2023]
Abstract
ABSTRACT Mitochondrial damage is an important cause of heart dysfunction after severe burn injury. However, the pathophysiological process remains unclear. This study aims to examine the mitochondrial dynamics in the heart and the role of μ-calpain, a cysteine protease, in this scenario. Rats were subjected to severe burn injury treatment, and the calpain inhibitor MDL28170 was administered intravenously 1 h before or after burn injury. Rats in the burn group displayed weakened heart performance and decreased mean arterial pressure, which was accompanied by a diminishment of mitochondrial function. The animals also exhibited higher levels of calpain in mitochondria, as reflected by immunofluorescence staining and activity tests. In contrast, treatment with MDL28170 before any severe burn diminished these responses to a severe burn. Burn injury decreased the abundance of mitochondria and resulted in a lower percentage of small mitochondria and a higher percentage of large mitochondria. Furthermore, burn injury caused an increase in the fission protein DRP1 in the mitochondria and a decrease in the inner membrane fusion protein OPA1. Similarly, these alterations were also blocked by MDL28170. Of note, inhibition of calpain yielded the emergence of more elongated mitochondria along with membrane invagination in the middle of the longitude, which is an indicator of the fission process. Finally, MDL28170, administered 1 h after burn injury, preserved mitochondrial function and heart performance, and increased the survival rate. Overall, these results provided the first evidence that mitochondrial recruitment of calpain confers heart dysfunction after severe burn injury, which involves aberrant mitochondrial dynamics.
Collapse
Affiliation(s)
- Ran-Ran Zhang
- School of Life Science, Northwest University, Xi’an, China
| | - Jing-Long Zhang
- Department of Cardiovascular Surgery, Xijing Hospital, Xi’an, China
| | - Qiao Li
- Department of Respiratory and Critical Care Medicine, Xijing Hospital, Xi’an, China
| | - Shu-Miao Zhang
- Department of Physiology and Pathophysiology, Air Force Medical University, Xi’an, China
| | - Xiao-Ming Gu
- Department of Physiology and Pathophysiology, Air Force Medical University, Xi’an, China
| | - Wen Niu
- Department of Physiology and Pathophysiology, Air Force Medical University, Xi’an, China
| | - Jing-Jun Zhou
- School of Life Science, Northwest University, Xi’an, China
- Department of Physiology and Pathophysiology, Air Force Medical University, Xi’an, China
| | - Lyu-Chen Zhou
- School of Life Science, Northwest University, Xi’an, China
- Department of Physiology and Pathophysiology, Air Force Medical University, Xi’an, China
| |
Collapse
|