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Yan Y, Lv X, Ma J, Hong G, Li S, Shen J, Chen H, Cao K, Chen S, Cheng T, Dong C, Han J, Ma H, Wu M, Wang X, Xing C, Zhu Y, Shen L, Wang Y, Tong F, Wang Z. Simvastatin Alleviates Intestinal Ischemia/Reperfusion Injury by Modulating Omi/HtrA2 Signaling Pathways. Transplant Proc 2019; 51:2798-2807. [PMID: 31351770 DOI: 10.1016/j.transproceed.2019.04.076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 04/26/2019] [Accepted: 04/26/2019] [Indexed: 12/30/2022]
Abstract
PURPOSE The objective of this research was to survey the therapeutic action of simvastatin (Sim) on intestinal ischemia/reperfusion injury (II/RI) by modulating Omi/HtrA2 signaling pathways. METHODS Sprague Dawley rats were pretreated with 40 mg/kg Sim and then subjected to 1 hour of ischemia and 3 hours of reperfusion. The blood and intestinal tissues were collected, pathologic injury was observed, the contents of serum tumor necrosis factor-α and interleukin-6 (IL-6) were estimated, and superoxide dismutase, methane dicarboxylic aldehyde, and cysteinyl aspartate specific proteinase-3 (caspase-3) levels, as well as the expressions of Omi/HtrA2 and caspase-3, were measured in the intestinal tissues. RESULTS Sim preconditioning mitigated the damnification of intestinal tissues by decreasing oxidative stress, inflammatory damage, and apoptosis and downregulating the expression of Omi/HtrA2 compared to the ischemia/reperfusion group, while Sim+Ucf-101 significantly augmented this effect. CONCLUSION These results suggest that Sim may alleviate intestinal ischemia/reperfusion injury by modulating Omi/HtrA2 signaling pathways.
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Affiliation(s)
- Ying Yan
- Department of Rehabilitation Medicine, Zhejiang Chinese Medical University, The Third Clinical Medicine, Hangzhou, Zhejiang, China
| | - Xiaoni Lv
- Department of Trauma Surgery, Army 952 Hospital of the Chinese People's Liberation Army, Geermu, Qinghai, China
| | - Jun Ma
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Ganji Hong
- Department of Neurology, The First Affiliated Hospital, Xiamen University, Xiamen, China
| | - Shikai Li
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Jiahao Shen
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Haotian Chen
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Kailei Cao
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Senjiang Chen
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Tao Cheng
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Chaojie Dong
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Jiahui Han
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Heng Ma
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Mingkang Wu
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Xin Wang
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Chenkai Xing
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Yutao Zhu
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Lanyu Shen
- Grade 2016, Clinical Medicine, Jiaxing University Medical College, Jiaxing, ZJ, PR China
| | - Yini Wang
- Department of Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China
| | - Fei Tong
- Department of Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, Fujian, China; Department of Pathology and Pathophysiology, Provincial Key Discipline of Pharmacology, Jiaxing University Medical College, Jiaxing, China.
| | - Zhongchao Wang
- Cardiovascular Medicine, Shanxi Cardiovascular Disease Hospital, Taiyuan, Shanxi, China.
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Casadei N, Sood P, Ulrich T, Fallier-Becker P, Kieper N, Helling S, May C, Glaab E, Chen J, Nuber S, Marcus K, Rapaport D, Ott T, Riess O, Krüger R, Fitzgerald JC. Mitochondrial defects and neurodegeneration in mice overexpressing wild-type or G399S mutant HtrA2. Hum Mol Genet 2015; 25:459-71. [DOI: 10.1093/hmg/ddv485] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 11/19/2015] [Indexed: 12/13/2022] Open
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3
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Application of the wheat-germ cell-free translation system to produce high temperature requirement A3 (HtrA3) proteases. Biotechniques 2012; 52:23-8. [PMID: 22229724 DOI: 10.2144/000113798] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Accepted: 11/29/2011] [Indexed: 11/23/2022] Open
Abstract
Mammalian high temperature requirement A3 (HtrA3) is a serine protease of the HtrA family. It is an important factor for placental development and a tumor suppressor. The biochemical properties of HtrA3 are uncharacterized. One critical step in biochemical characterization is overexpressing and purifying the full-length recombinant protein. However, utility of cell-based expression systems is limited for a protease because of autocleavage. The wheat-germ cell-free translation system is highly efficient at producing "difficult" eukaryotic multidomain proteins and is easily modifiable for protein synthesis at different temperatures. In this study, we evaluated the potential of the wheat-germ cell-free translation system for producing human HtrA3. HtrA3 underwent autocleavage when synthesized at 17 °C. When the synthesis temperature was lowered to 4 °C, full-length HtrA3 was successfully produced and proteolytically active. Catalytic site serine substitution with alanine (S305A) stabilized HtrA3 while abolishing its protease activity. This mutant was readily synthesized and stable at 17 °C. When used with glutathione S-transferase (GST) pull-down assay, S305A HtrA3 was a valuable bait in searching for endogenous HtrA3 binding proteins. Thus, we demonstrated the unique utility of the wheat-germ cell-free translation system for producing and characterizing human HtrA3. These strategies will be likely applicable to a wide range of proteases.
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Matrix metalloproteinase-3 is activated by HtrA2/Omi in dopaminergic cells: relevance to Parkinson's disease. Neurochem Int 2012; 60:249-56. [PMID: 22265821 DOI: 10.1016/j.neuint.2012.01.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 12/19/2011] [Accepted: 01/03/2012] [Indexed: 12/21/2022]
Abstract
Dopaminergic neurons in the substantia nigra are particularly vulnerable, and their degeneration leads to Parkinson's disease. We have previously reported that matrix metalloproteinase-3 (MMP-3) activity is involved in dopaminergic neurodegeneration by multiple mechanisms and that this requires activation of MMP-3 from proMMP-3 by an intracellular serine protease. HtrA2/Omi is a mitochondrial serine protease that has been shown in non-dopaminergic cells to translocate into the cytosol where it triggers apoptosis. In the present study we sought to determine whether HtrA2/Omi might cause activation of MMP-3 in dopaminergic neuronal cells using CATH.a cell line. Mitochondrial stress induced by rotenone led to MMP-3 activation and HtrA2/Omi translocation into the cytosol. The MMP-3 activation involved HtrA2/Omi, because both pharmacological inhibition and siRNA-induced knockdown of HtrA2/Omi attenuated the activation induced by rotenone or MPP+. Overexpression of mature HtrA2/Omi, but not mutant HtrA2/Omi, resulted in MMP-3 activity increase and cell death. Addition of recombinant and catalytically active HtrA2/Omi to lysate of untreated cells led to activation of the endogenous MMP-3, and incubation of the HtrA2/Omi with recombinant proMMP-3 caused cleavage of proMMP-3 to a 48kD protein, corresponding to the active form, which was accompanied by an increase in MMP-3 activity. Taken together, the data indicate that HtrA2/Omi, which normally exists in the mitochondria, can cause MMP-3 activation in the cytosol under a cell stress condition, which can ultimately lead to demise of dopaminergic neuronal cells.
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Park DW, Kim SS, Nam MK, Kim GY, Kim J, Rhim H. Improved recovery of active GST-fusion proteins from insoluble aggregates: solubilization and purification conditions using PKM2 and HtrA2 as model proteins. BMB Rep 2011; 44:279-84. [PMID: 21524355 DOI: 10.5483/bmbrep.2011.44.4.279] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The glutathione S-transferase (GST) system is useful for increasing protein solubility and purifying soluble GST fusion proteins. However, purifying half of the GST fusion proteins is still difficult, because they are virtually insoluble under non-denaturing conditions. To optimize a simple and rapid purification condition for GST-pyruvate kinase muscle 2 (GST-PKM2) protein, we used 1% sarkosyl for lysis and a 1:200 ratio of sarkosyl to Triton X-100 (S-T) for purification. We purified the GST-PKM2 protein with a high yield, approximately 5 mg/L culture, which was 33 times higher than that prepared using a conventional method. Notably, the GST-high-temperature requirement A2 (GST-HtrA2) protein, used as a model protein for functional activity, fully maintained its proteolytic activity, even when purified under our S-T condition. This method may be useful to apply to other biologically important proteins that become highly insoluble in the prokaryotic expression system.
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Affiliation(s)
- Dae-Wook Park
- Department of Biomedical Sciences, College of Medicine, The Catholic University of Korea, Seoul 137-701, Korea
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Park HJ, Kim SS, Seong YM, Kim KH, Goo HG, Yoon EJ, Min DS, Kang S, Rhim H. Beta-amyloid precursor protein is a direct cleavage target of HtrA2 serine protease. Implications for the physiological function of HtrA2 in the mitochondria. J Biol Chem 2006; 281:34277-87. [PMID: 16968707 DOI: 10.1074/jbc.m603443200] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The processing and metabolism of amyloid precursor protein (APP) is a major interest in Alzheimer disease (AD) research, because not only amyloid beta (Abeta) peptide, but also cellular or mitochondrial APP are intimately involved in cellular dysfunction and AD pathogenesis. Here we demonstrate that APP is directly and efficiently cleaved by the HtrA2 serine protease in vitro and in vivo. Using several APP mutants and N-terminal amino acid sequencing, we identified that the HtrA2-mediated APP cleavage product is the C161 fragment encompassing amino acids 535-695 of APP695. The immunofluorescence and subcellular fractionation studies indicate that APP is partly colocalized with HtrA2 in the mitochondria where HtrA2 can cleave APP under normal conditions. The HtrA2-cleaved C161 fragment was detected in the cytosolic fraction; therefore, we postulate that the C161 fragment is released into the cytosol after cleavage of APP by HtrA2. Interestingly, the level of C161 was remarkably decreased in motor neuron degeneration (mnd2) mice in which the serine protease activity of HtrA2 was greatly reduced. These results show that the protease activity of HtrA2 is essential for the production of C161 and that processing of APP into C161 is a natural event occurring under normal physiological conditions. Our study suggests that the direct cleavage of mitochondrial APP by HtrA2 may prevent mitochondrial dysfunction caused by accumulation of APP and that the regulation of HtrA2 protease activity may be a therapeutic target in AD.
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Affiliation(s)
- Hyo-Jin Park
- School of Life Sciences and Biotechnology, Korea University, Seoul 136-701, South Korea
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Seong YM, Choi JY, Park HJ, Kim KJ, Ahn SG, Seong GH, Kim IK, Kang S, Rhim H. Autocatalytic Processing of HtrA2/Omi Is Essential for Induction of Caspase-dependent Cell Death through Antagonizing XIAP. J Biol Chem 2004; 279:37588-96. [PMID: 15201285 DOI: 10.1074/jbc.m401408200] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A mature form of nuclear-encoded mitochondrial serine protease HtrA2/Omi is pivotal in regulating apoptotic cell death; however, the underlying mechanism of the processing event of HtrA2/Omi and its relevant biological function remain to be clarified. Here, we describe that HtrA2/Omi is autocatalytically processed to the 36-kDa protein fragment, which is required for the cytochrome c-dependent caspase activation along with neutralizing XIAP-mediated inhibition of caspases through interaction with XIAP, eventually promoting apoptotic cell death. We have shown that the autocatalytic processing of HtrA2/Omi occurs via an intermolecular event, demonstrated by incubating an in vitro translated HtrA2/Omi (S306A) mutant with the enzymatically active glutathione S-transferase-HtrA2/Omi protein. Using N-terminal amino acid sequencing and mutational analysis, we identified that the autocatalytic cleavage site is the carboxyl side of alanine 133 of HtrA2/Omi, resulting in exposure of an inhibitor of apoptosis protein binding motif in its N terminus. Our study provides evidence that the autocatalytic processing of HtrA2/Omi is crucial for regulating HtrA2/Omi-mediated apoptotic cell death.
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Affiliation(s)
- Young-Mo Seong
- Graduate School of Biotechnology, Korea University, Seoul 136-701, Korea
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