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Zhou H, Zheng D, Wang H, Wu Y, Peng X, Li Q, Li T, Liu L. The protective effects of pericyte-derived microvesicles on vascular endothelial functions via CTGF delivery in sepsis. Cell Commun Signal 2021; 19:115. [PMID: 34784912 PMCID: PMC8594111 DOI: 10.1186/s12964-021-00795-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/16/2021] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND It is well known that sepsis is a prevalent severe disease caused by infection and the treatment strategies are limited. Recently pericyte-derived microvesicles (PMVs) were confirmed to be therapeutic in many diseases, whether PMVs can protect vascular endothelial cell (VEC) injury is unknown. METHODS Pericytes were extracted from the retina of newly weaned rats, and PMVs were collected after starvation and characterized by flow-cytometry and transmission electron microscopy. First, the effect of PMVs on pulmonary vascular function in septic rats was measured via intravenous administration with HE staining, immunofluorescence, and Elisa analysis. Then, PMVs were co-incubated with VECs in the presence of lipopolysaccharide (LPS), and observed the protective effect of PMVs on VECs. Next, the proteomic analysis and further Gene Ontology (GO) enrichment analysis were performed to analyze the therapeutic mechanism of PMVs, and the angiogenesis-related protein CTGF was highly expressed in PMVs. Finally, by CTGF upregulation and downregulation in PMV, the role of PMV-carried CTGF was investigated. RESULTS PMVs restored the proliferation and angiogenesis ability of pulmonary VECs, and alleviated pulmonary vascular leakage in septic rats and LPS-stimulated VECs. Further study showed that PMVs delivered CTGF to VECs, and subsequently activated ERK1/2, and increased the phosphorylation of STAT3, thereby improving the function of VECs. The further study found CD44 mediated the absorption and internalization of PMVs to VECs, the anti-CD44 antibody inhibited the protective effect of PMVs. CONCLUSIONS PMVs may delivery CTGF to VECs, and promote the proliferation and angiogenesis ability by activating the CTGF-ERK1/2-STAT3 axis, thereby protecting pulmonary vascular function in sepsis. The therapeutic effect of PMVs was highly related to CD44-mediated absorption. Video Abstract.
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Affiliation(s)
- Henan Zhou
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
| | - Danyang Zheng
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
- Intensive Care Unit, General Hospital of Central Theater Command, Wuhan, 430064 China
| | - Hongchen Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
| | - Yue Wu
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
| | - Xiaoyong Peng
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
| | - Qinghui Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
| | - Tao Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
| | - Liangming Liu
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Army Medical Center of PLA, Daping Hospital, Army Medical University, No.10th Daping Changjiang Road, Chongqing, 400038 China
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Zhang Y, Zhang X, Cao Z, Huang Y, Zheng Y, Yang X. Endothelial cell-derived SSAO can increase MLC 20 phosphorylation in VSMCs. Open Life Sci 2021; 16:1141-1150. [PMID: 34722886 PMCID: PMC8542650 DOI: 10.1515/biol-2021-0114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 08/03/2021] [Accepted: 08/10/2021] [Indexed: 12/01/2022] Open
Abstract
Vascular hyporesponsiveness in the shock decompensation period is an important factor leading to death. Myosin light chain 20 (MLC20) is the main effector protein that regulates vascular reactivity. However, whether the change in semicarbazide-sensitive amine oxidase (SSAO) expression during hypoxia can change the MLC20 phosphorylation level, and its underlying mechanism were not clear. The amine oxidase copper containing 3 (AOC3) overexpressing adenovirus vector was constructed and transfected into rat intestinal microvascular endothelial cells (RIMECs) to overexpress SSAO, and the RIMECs were co-cultured with rat intestinal microvascular smooth muscle cells (RIMSCs). The changes in SSAO/inducible nitric oxide synthase (iNOS)/Rho associate coiled-coil containing protein kinase 1 (ROCK1) expression levels and MLC20 phosphorylation level were detected. Here we found that the increased SSAO by AOC3 overexpression can decrease the iNOS expression level and its activity after hypoxia. In addition, RIMSCs co-cultured with RIMECs overexpressed with AOC3 gene had significantly higher ROCK1 protein level and MLC20 phosphorylation level than RIMSCs co-cultured with normal RIMECs. Our study demonstrated that SSAO overexpression can significantly inhibit iNOS activity, promote RhoA/ROCK pathway activation, and increase the phosphorylation level of MLC20, which might be the potential mechanism in relieving the vascular hyporesponsiveness during shock decompensation.
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Affiliation(s)
- Yuxing Zhang
- Department of General Surgery, The Sixth Medical Center of PLA General Hospital, Beijing 100048, People's Republic of China
| | - Xiliang Zhang
- Department of General Surgery, The Sixth Medical Center of PLA General Hospital, Beijing 100048, People's Republic of China
| | - Zhen Cao
- Department of General Surgery, The Sixth Medical Center of PLA General Hospital, Beijing 100048, People's Republic of China
| | - Yun Huang
- Department of General Surgery, The Sixth Medical Center of PLA General Hospital, Beijing 100048, People's Republic of China
| | - Yuexin Zheng
- Department of General Surgery, The Sixth Medical Center of PLA General Hospital, Beijing 100048, People's Republic of China
| | - Xiaodong Yang
- Department of General Surgery, The Sixth Medical Center of PLA General Hospital, Beijing 100048, People's Republic of China
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Rho-Proteins and Downstream Pathways as Potential Targets in Sepsis and Septic Shock: What Have We Learned from Basic Research. Cells 2021; 10:cells10081844. [PMID: 34440613 PMCID: PMC8391638 DOI: 10.3390/cells10081844] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/09/2021] [Accepted: 07/15/2021] [Indexed: 01/19/2023] Open
Abstract
Sepsis and septic shock are associated with acute and sustained impairment in the function of the cardiovascular system, kidneys, lungs, liver, and brain, among others. Despite the significant advances in prevention and treatment, sepsis and septic shock sepsis remain global health problems with elevated mortality rates. Rho proteins can interact with a considerable number of targets, directly affecting cellular contractility, actin filament assembly and growing, cell motility and migration, cytoskeleton rearrangement, and actin polymerization, physiological functions that are intensively impaired during inflammatory conditions, such as the one that occurs in sepsis. In the last few decades, Rho proteins and their downstream pathways have been investigated in sepsis-associated experimental models. The most frequently used experimental design included the exposure to bacterial lipopolysaccharide (LPS), in both in vitro and in vivo approaches, but experiments using the cecal ligation and puncture (CLP) model of sepsis have also been performed. The findings described in this review indicate that Rho proteins, mainly RhoA and Rac1, are associated with the development of crucial sepsis-associated dysfunction in different systems and cells, including the endothelium, vessels, and heart. Notably, the data found in the literature suggest that either the inhibition or activation of Rho proteins and associated pathways might be desirable in sepsis and septic shock, accordingly with the cellular system evaluated. This review included the main findings, relevance, and limitations of the current knowledge connecting Rho proteins and sepsis-associated experimental models.
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Zheng D, Zhou H, Wang H, Zhu Y, Wu Y, Li Q, Li T, Liu L. Mesenchymal stem cell-derived microvesicles improve intestinal barrier function by restoring mitochondrial dynamic balance in sepsis rats. Stem Cell Res Ther 2021; 12:299. [PMID: 34039427 PMCID: PMC8152336 DOI: 10.1186/s13287-021-02363-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 04/29/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Sepsis is a major cause of death in ICU, and intestinal barrier dysfunction is its important complication, while the treatment is limited. Recently, mesenchymal stem cell-derived microvesicles (MMVs) attract much attention as a strategy of cell-free treatment; whether MMVs are therapeutic in sepsis induced-intestinal barrier dysfunction is obscure. METHODS In this study, cecal ligation and puncture-induced sepsis rats and lipopolysaccharide-stimulated intestinal epithelial cells to investigate the effect of MMVs on intestinal barrier dysfunction. MMVs were harvested from mesenchymal stem cells and were injected into sepsis rats, and the intestinal barrier function was measured. Afterward, MMVs were incubated with intestinal epithelial cells, and the effect of MMVs on mitochondrial dynamic balance was measured. Then the expression of mfn1, mfn2, OPA1, and PGC-1α in MMVs were measured by western blot. By upregulation and downregulation of mfn2 and PGC-1α, the role of MMVs in mitochondrial dynamic balance was investigated. Finally, the role of MMV-carried mitochondria in mitochondrial dynamic balance was investigated. RESULTS MMVs restored the intestinal barrier function by improving mitochondrial dynamic balance and metabolism of mitochondria. Further study revealed that MMVs delivered mfn2 and PGC-1α to intestinal epithelial cells, and promoted mitochondrial fusion and biogenesis, thereby improving mitochondrial dynamic balance. Furthermore, MMVs delivered functional mitochondria to intestinal epithelial cells and enhanced energy metabolism directly. CONCLUSION MMVs can deliver mfn2, PGC-1α, and functional mitochondria to intestinal epithelial cells, synergistically improve mitochondrial dynamic balance of target cells after sepsis, and restore the mitochondrial function and intestinal barrier function. The study illustrated that MMVs might be a promising strategy for the treatment of sepsis.
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Affiliation(s)
- Danyang Zheng
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China
| | - Henan Zhou
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China
| | - Hongchen Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China
| | - Yu Zhu
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China
| | - Yue Wu
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China
| | - Qinghui Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China
| | - Tao Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China.
| | - Liangming Liu
- State Key Laboratory of Trauma, Burns and Combined Injury, Shock and Transfusion Department, Research Institute of Surgery, Daping Hospital, Army Medical University, Daping, Chongqing, 400042, People's Republic of China.
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