1
|
Jiang LP, Yu XH, Chen JZ, Hu M, Zhang YK, Lin HL, Tang WY, He PP, Ouyang XP. Histone Deacetylase 3: A Potential Therapeutic Target for Atherosclerosis. Aging Dis 2022; 13:773-786. [PMID: 35656103 PMCID: PMC9116907 DOI: 10.14336/ad.2021.1116] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/16/2021] [Indexed: 11/17/2022] Open
Abstract
Atherosclerosis, the pathological basis of most cardiovascular disease, is characterized by plaque formation in the intima. Secondary lesions include intraplaque hemorrhage, plaque rupture, and local thrombosis. Vascular endothelial function impairment and smooth muscle cell migration lead to vascular dysfunction, which is conducive to the formation of macrophage-derived foam cells and aggravates inflammatory response and lipid accumulation that cause atherosclerosis. Histone deacetylase (HDAC) is an epigenetic modifying enzyme closely related to chromatin structure and gene transcriptional regulation. Emerging studies have demonstrated that the Class I member HDAC3 of the HDAC super family has cell-specific functions in atherosclerosis, including 1) maintenance of endothelial integrity and functions, 2) regulation of vascular smooth muscle cell proliferation and migration, 3) modulation of macrophage phenotype, and 4) influence on foam cell formation. Although several studies have shown that HDAC3 may be a promising therapeutic target, only a few HDAC3-selective inhibitors have been thoroughly researched and reported. Here, we specifically summarize the impact of HDAC3 and its inhibitors on vascular function, inflammation, lipid accumulation, and plaque stability in the development of atherosclerosis with the hopes of opening up new opportunities for the treatment of cardiovascular diseases.
Collapse
Affiliation(s)
- Li-Ping Jiang
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical School, University of South China, Hunan, China.
| | - Xiao-Hua Yu
- Institute of Clinical Medicine, the Second Affiliated Hospital of Hainan Medical University, Haikou, China.
| | - Jin-Zhi Chen
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical School, University of South China, Hunan, China.
| | - Mi Hu
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical School, University of South China, Hunan, China.
| | - Yang-Kai Zhang
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical School, University of South China, Hunan, China.
| | - Hui-Ling Lin
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical School, University of South China, Hunan, China.
| | - Wan-Ying Tang
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical School, University of South China, Hunan, China.
| | - Ping-Ping He
- School of Nursing, University of South China, Hunan, China
- Correspondence should be addressed to: Dr. Ping-Ping He, School of Nursing, University of South China, Hunan, China. and Dr. Xin-Ping Ouyang, Department of Physiology, University of South China, Hunan, China. .
| | - Xin-Ping Ouyang
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical School, University of South China, Hunan, China.
- Correspondence should be addressed to: Dr. Ping-Ping He, School of Nursing, University of South China, Hunan, China. and Dr. Xin-Ping Ouyang, Department of Physiology, University of South China, Hunan, China. .
| |
Collapse
|
2
|
Liu X, Jiang D, Huang W, Teng P, Zhang H, Wei C, Cai X, Liang Y. Sirtuin 6 attenuates angiotensin II-induced vascular adventitial aging in rat aortae by suppressing the NF-κB pathway. Hypertens Res 2021; 44:770-780. [PMID: 33654247 DOI: 10.1038/s41440-021-00631-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 11/24/2020] [Accepted: 12/30/2020] [Indexed: 01/31/2023]
Abstract
Adventitia-induced vascular remodeling plays an important role in vascular aging. However, the mechanism remains unclear. In this study, we found that sirtuin 6 (SIRT6) expression was downregulated in the aortae of aged rats compared with those of young rats. Adventitial fibroblasts (AFs) were isolated and cultured from rat aortae to clarify the relationship between SIRT6 expression and vascular aging. Lentivirus-mediated SIRT6 knockdown promoted the aging phenotype in AFs, affecting proliferation, collagen secretion, migration, and α-smooth muscle actin expression. Moreover, angiotensin II (Ang II) decreased SIRT6 expression, activated the NF-κB pathway, and led to vascular aging. The NF-κB pathway inhibitor BAY 11-7082 reduced Ang II-induced nuclear translocation of the NF-κB p65 subunit and other effects of Ang II, such as AF proliferation, collagen secretion, and migration. Mechanistically, SIRT6 suppression increased acetyl-NF-κB p65 (Lys310) expression and NF-κB transcriptional activity in SIRT6-knockdown AFs. SIRT6 could directly bind to the p65 subunit and attenuate Ang II-induced NF-κB activation and vascular aging. In summary, this study was the first to correlate SIRT6 expression and adventitia-induced vascular senescence. SIRT6 maybe a biomarker of vascular aging, and activating SIRT6 maybe a therapeutic strategy for delaying vascular aging.
Collapse
Affiliation(s)
- Xiaoqian Liu
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Dongyang Jiang
- Department of Geriatric Cardiology, Weifang Medical University, Weifang, 261053, Shandong, PR China
| | - Wen Huang
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Peixiu Teng
- Department of Cardiology, Jinan Third People's Hospital, Jinan, 250100, Shandong, PR China
| | - Hui Zhang
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Chuanqiao Wei
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China
| | - Xiaowen Cai
- Department of General Practice, Shandong First Medical University, Taian, 271016, Shandong, PR China
| | - Ying Liang
- Department of General Practice, Shandong Provincial Qianfoshan Hospital, the First Affiliated Hospital of Shandong First Medical University, Jinan, 250014, Shandong, PR China.
| |
Collapse
|
3
|
Kiani AA, Elyasi H, Ghoreyshi S, Nouri N, Safarzadeh A, Nafari A. Study on hypoxia-inducible factor and its roles in immune system. Immunol Med 2021; 44:223-236. [PMID: 33896415 DOI: 10.1080/25785826.2021.1910187] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The Hypoxia-Inducible Factor-1 (HIF-1) is a dimeric protein complex that plays a significant role in responding to low oxygen or hypoxia concentrations. Chronic inflammation is one of the immune system responses and can increase HIF expression in involved tissues through lowering the oxygen and hypoxia. The HIF factor has many critical roles in immunity, and thus, we reviewed the crucial roles of this factor in the immune system. The results showed various key roles on the immune system, including physical defenses, innate immune (neutrophils apoptosis, macrophages) and inflammatory responses (pyrexia and local heat, iron access, etc.), upregulation in response to microbial infections, cytokines expression (IL-1, IL-2, IL-6, IL-8, IL-12, IL-18, TNF, etc.), drug targeting, etc. The HIF roles in the acquired immune system include: enhance the adaptation of cells (dendritic cells) to new conditions and triggering the signal pathways. The findings of the present review demonstrated that the HIF has important roles in the immune system, including physical defense, innate immune as well as acquired immunity; therefore, it may be considered as a potent drug targeting several diseases such as cancers, infectious diseases, etc.
Collapse
Affiliation(s)
- Ali Asghar Kiani
- Department of Laboratory Sciences, Lorestan University of Medical Sciences, Khoramabad, Iran
| | - Hossein Elyasi
- Student Research Committee, Lorestan University of Medical Sciences, Khoramabad, Iran
| | - Shadiyeh Ghoreyshi
- Student Research Committee, Lorestan University of Medical Sciences, Khoramabad, Iran
| | - Negar Nouri
- Student Research Committee, Lorestan University of Medical Sciences, Khoramabad, Iran
| | - Ali Safarzadeh
- Student Research Committee, Lorestan University of Medical Sciences, Khoramabad, Iran
| | - Amirhossein Nafari
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| |
Collapse
|
4
|
FOXO3a-dependent up-regulation of Mxi1-0 promotes hypoxia-induced apoptosis in endothelial cells. Cell Signal 2018; 51:233-242. [DOI: 10.1016/j.cellsig.2018.08.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/13/2018] [Accepted: 08/13/2018] [Indexed: 02/07/2023]
|
5
|
Osanai T, Tanaka M, Mikami K, Kitajima M, Magota K, Tomita H, Okumura K. Mitochondrial inhibitory factor protein 1 attenuates coupling factor 6-induced aging signal. J Cell Biochem 2018; 119:6194-6203. [PMID: 29575130 DOI: 10.1002/jcb.26828] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 02/28/2018] [Indexed: 12/16/2022]
Abstract
Coupling factor 6 (CF6) forces a counter-clockwise rotation of plasma membrane F1 Fo complex, resulting in proton import and accelerated aging. Inhibitory factor peptide 1 (IF1) suppresses a unidirectional counter-clockwise rotation of F1 Fo complex without affecting ATP synthesis. We tested the hypothesis that IF1 may attenuate CF6-induced aging signaling in CF6-overexpressing transgenic (TG) cells. In IF1-GFP overexpressing wild type (WT) cells, the diffuse peripheral staining of tubular mitochondria was observed with a dense widely distributed network around the nucleus. In TG cells, however, the only peri-nuclear network of fragmented mitochondria was observed at 24 h, but it was developed to a widely distributed mitochondrial network of tubular mitochondria at 72 h. TG cells displayed aging hallmarks of telomere attrition, epigenetic alterations, defective proteostasis, and genomic instability with a decrease in emerin and lamin and loss of heterochromatin. IF1 induction rescued TG cells from telomere attrition, expression of genomic instability with the increase in emerin and lamin, and that of epigenetic alterations with recovery of heterochromatin. In defective proteostasis, IF1 induction restored a potent peri-nuclear staining of autolysosomes compared with the baseline weak staining. The decrease in Atg7 was restored, whereas the increase in P62 was abolished. We conclude that genetic disruption of proton signals by IF1 induction suppressed CF6-induced expression of aging hallmarks such as telomere attrition, epigenetic alterations, defective proteostasis, and genomic instability. Given the widespread biological actions of CF6, the physiological and pathological actions of IF1 may be complex.
Collapse
Affiliation(s)
- Tomohiro Osanai
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Makoto Tanaka
- Department of Hypertension and Stroke Internal Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Kasumi Mikami
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Maiko Kitajima
- Department of Nursing Science, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Koji Magota
- Daiichi Sankyo Co., Ltd., Biologics Technology Research Laboratories Group1, Pharmaceutical Technology Division, 2716-1, Kurakake, Akaiwa, Chiyoda-machi, Oura-gun, Gunma, Japan
| | - Hirofumi Tomita
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Ken Okumura
- Division of Cardiology, Saiseikai Kumamoto Hospital, Kumamoto, Japan
| |
Collapse
|
6
|
Guan SY, Leng RX, Tao JH, Li XP, Ye DQ, Olsen N, Zheng SG, Pan HF. Hypoxia-inducible factor-1α: a promising therapeutic target for autoimmune diseases. Expert Opin Ther Targets 2017; 21:715-723. [PMID: 28553732 DOI: 10.1080/14728222.2017.1336539] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Hypoxia-inducible factor-1α (HIF-1α) plays a crucial role in both innate and adaptive immunity. Emerging evidence indicates that HIF-1α is associated with the inflammation and pathologic activities of autoimmune diseases. Areas covered: Considering that the types of autoimmune diseases are complicated and various, this review aims to cover the typical kinds of autoimmune diseases, discuss the molecular mechanisms, biological functions and expression of HIF-1α in these diseases, and further explore its therapeutic potential. Expert opinion: Inflammation and hypoxia are interdependent. HIF-1α as a key regulator of hypoxia, exerts a crucial role in the balance between Th17 and Treg, and involves in the inflammation and pathologic activities of autoimmune diseases. Although there are many challenges remaining to be overcome, targeting HIF-1α could be a promising strategy for autoimmune diseases therapies.
Collapse
Affiliation(s)
- Shi-Yang Guan
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Rui-Xue Leng
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Jin-Hui Tao
- c Department of Rheumatology , Anhui Provincial Hospital , Hefei , China
| | - Xiang-Pei Li
- c Department of Rheumatology , Anhui Provincial Hospital , Hefei , China
| | - Dong-Qing Ye
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Nancy Olsen
- d Division of Rheumatology , Penn State University Hershey College of Medicine , Hershey , PA , USA
| | - Song Guo Zheng
- d Division of Rheumatology , Penn State University Hershey College of Medicine , Hershey , PA , USA
| | - Hai-Feng Pan
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| |
Collapse
|
7
|
Chen CC, Hsia CW, Ho CW, Liang CM, Chen CM, Huang KL, Kang BH, Chen YH. Hypoxia and hyperoxia differentially control proliferation of rat neural crest stem cells via distinct regulatory pathways of the HIF1α-CXCR4 and TP53-TPM1 proteins. Dev Dyn 2017; 246:162-185. [PMID: 28002632 DOI: 10.1002/dvdy.24481] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 12/09/2016] [Accepted: 12/13/2016] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Neural crest stem cells (NCSCs) are a population of adult multipotent stem cells. We are interested in studying whether oxygen tensions affect the capability of NCSCs to self-renew and repair damaged tissues. NCSCs extracted from the hair follicle bulge region of the rat whisker pad were cultured in vitro under different oxygen tensions. RESULTS We found significantly increased and decreased rates of cell proliferation in rat NCSCs (rNCSCs) cultured, respectively, at 0.5% and 80% oxygen levels. At 0.5% oxygen, the expression of both hypoxia-inducible factor (HIF) 1α and CXCR4 was greatly enhanced in the rNCSC nuclei and was suppressed by incubation with the CXCR4-specific antagonist AMD3100. In addition, the rate of cell apoptosis in the rNCSCs cultured at 80% oxygen was dramatically increased, associated with increased nuclear expression of TP53, decreased cytoplasmic expression of TPM1 (tropomyosin-1), and increased nuclear-to-cytoplasmic translocation of S100A2. Incubation of rNCSCs with the antioxidant N-acetylcysteine (NAC) overcame the inhibitory effect of 80% oxygen on proliferation and survival of rNCSCs. CONCLUSIONS Our results show for the first time that extreme oxygen tensions directly control NCSC proliferation differentially via distinct regulatory pathways of proteins, with hypoxia via the HIF1α-CXCR4 pathway and hyperoxia via the TP53-TPM1 pathway. Developmental Dynamics 246:162-185, 2017. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Chien-Cheng Chen
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Neihu District, Taipei City, Taiwan
| | - Ching-Wu Hsia
- Department of Finance, School of Management, Shih Hsin University, Wenshan District, Taipei City, Taiwan
| | - Cheng-Wen Ho
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Neihu District, Taipei City, Taiwan
- Division of Rehabilitation Medicine, Taoyuan Armed Forces General Hospital, Longtan District, Taoyuan City, Taiwan
| | - Chang-Min Liang
- Department of Ophthalmology, Tri-Service General Hospital, Neihu District, Taipei City, Taiwan
| | - Chieh-Min Chen
- Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Neihu District, Taipei City, Taiwan
| | - Kun-Lun Huang
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Neihu District, Taipei City, Taiwan
- Department of Undersea and Hyperbaric Medicine, Tri-Service General Hospital, Neihu District, Taipei City, Taiwan
| | - Bor-Hwang Kang
- Division of Diving Medicine, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Zuoying District, Kaohsiung City, Taiwan
- Department of Otorhinolaryngology - Head and Neck Surgery, Tri-Service General Hospital, Taipei City, Taiwan
| | - Yi-Hui Chen
- Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Neihu District, Taipei City, Taiwan
| |
Collapse
|
8
|
Yin J, You S, Li N, Jiao S, Hu H, Xue M, Wang Y, Cheng W, Liu J, Xu M, Yan S, Li X. Lung-specific RNA interference of coupling factor 6, a novel peptide, attenuates pulmonary arterial hypertension in rats. Respir Res 2016; 17:99. [PMID: 27491388 PMCID: PMC4973057 DOI: 10.1186/s12931-016-0409-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 06/08/2016] [Indexed: 02/04/2023] Open
Abstract
Background Pulmonary arterial hypertension (PAH) is a progressive and life-threatening disease associated with high morbidity and mortality rates. However, the exact regulatory mechanism of PAH is unknown. Although coupling factor 6 (CF6) is known to function as a repressor, its role in PAH has not been explored. Here, we investigated the involvement of endogenous CF6 in the development of PAH. Methods PAH was induced with monocrotaline (MCT), as demonstrated by significant increases in pulmonary artery pressure and vessel wall thickness. The adeno-associated virus (AAV) carrying CF6 short hairpin RNA (shRNA) or control vector (2×1010 gp) was intratracheally transfected into the lungs of rats 2 weeks before or after MCT injection. Results A 2-6-fold increase in CF6 was observed in the lungs and circulation of the MCT-injected rats as confirmed by qRT-PCR and ELISA. Immunohistochemistry analysis revealed a small quantity of CF6 localized to endothelial cells (ECs) under physiological conditions spread to surrounding tissues in a paracrine manner in PAH lungs. Notably, CF6 shRNA effectively inhibited CF6 expression, abolished lung macrophage infiltration, reversed endothelial dysfunction and vascular remodeling, and ameliorated the severity of pulmonary hypertension and right ventricular dysfunction at 4 weeks both as a pretreatment and rescue intervention. In addition, the circulating and lung levels of 6-keto-PGF1a, a stable metabolite of prostacyclin, were reversed by CF6 inhibition, suggesting that the effect of CF6 inhibition may partly be mediated through prostacyclin. Conclusions CF6 contributes to the pathogenesis of PAH, probably in association with downregulation of prostacyclin. The blockage of CF6 might be applied as a novel therapeutic approach for PAH and PA remodeling. Electronic supplementary material The online version of this article (doi:10.1186/s12931-016-0409-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Jie Yin
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China
| | - Shuling You
- Department of Pathology, Adicon Company, Wangkai Infectious Diseases Hospital of Zaozhuang City, Zaozhuang, Shandong, China
| | - Nannan Li
- Department of Emergency, Shandong Provincial Qianfoshan Hospital, Shandong University of Traditional Chinese Medicine, Jinan, Shandong Province, China
| | - Shouhai Jiao
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China
| | - Hesheng Hu
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China
| | - Mei Xue
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China
| | - Ye Wang
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China
| | - Wenjuan Cheng
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China
| | - Ju Liu
- Medical Research Center, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, Shandong Province, China
| | - Min Xu
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China
| | - Suhua Yan
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China.
| | - Xiaolu Li
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, No. 16766 Jingshi Road, Lixia District, Jinan, Shandong Province, China. .,Department of Emergency, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, Shandong Province, China.
| |
Collapse
|
9
|
Kawai M, Osanai T, Tanaka M, Magota K, Tomita H, Okumura K. Mitochondrial Inhibitory Factor Protein 1 Functions as an Endogenous Inhibitor for Coupling Factor 6. J Cell Biochem 2016; 117:1680-7. [PMID: 26659871 DOI: 10.1002/jcb.25461] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 12/10/2015] [Indexed: 12/16/2023]
Abstract
Coupling factor 6 (CF6) forces a counter-clockwise rotation of plasma membrane F1 Fo complex unlike a proton-mediated clockwise rotation in the mitochondria, resulting in ATP hydrolysis, proton import, and apoptosis. Inhibitory peptide 1 (IF1) inhibits a unidirectional counter-clockwise rotation of F1 Fo complex without affecting ATP synthesis by a clockwise rotation. We tested the hypothesis that IF1 may antagonize the biological action of CF6 in human embryonic kidney 293 cells. We generated mature and immature IF1 expression vectors and those labeled with GFP at the C-terminus. In the immature IF1-GFP overexpressing cells, the mitochondrial network of IF1-GFP was newly found at the plasma membrane after peripheral translocation, whereas in mature IF1-GFP transfected cells, a less punctuate rather homogenous pattern was found in the cytoplasm. IF1 protein was detected in the exosome fraction of culture media, and it was enhanced by mature or immature IF1 transfection. Extracellular ATP hydrolysis was enhanced by CF6, whereas immature or mature IF1 transfection suppressed ATP hydrolysis in response to CF6. Intracellular pH was decreased by CF6 but was unchanged after immature IF1 transfection. CF6-induced increase in apoptotic cells was blocked by immature or mature IF1, being accompanied by protein kinase B (PKB) phosphorylation. IF1 antagonizes the pro-apoptotic action of CF6 by relief of intracellular acidification and resultant phosphorylation of PKB. Given the widespread biological actions of CF6, the physiological and pathological functions of IF1 may be expected to be complex. J. Cell. Biochem. 117: 1680-1687, 2016. © 2015 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Misato Kawai
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Tomohiro Osanai
- Department of Health Promotion, Hirosaki University Graduate School of Health Science, Hirosaki, Japan
| | - Makoto Tanaka
- Department of Hypertension and Stroke Internal Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Koji Magota
- Faculty of Discovery and Biotechnology II, Asubio Pharma Co., Ltd., 6-4-3 Minatojima-Minamimachi, Chuo-ku, Kobe, 650-0047, Japan
| | - Hirofumi Tomita
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Ken Okumura
- Department of Cardiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| |
Collapse
|
10
|
An exaggerated blood pressure response to exercise is associated with nitric oxide bioavailability and inflammatory markers in normotensive females. Hypertens Res 2016; 39:792-798. [PMID: 27334061 DOI: 10.1038/hr.2016.75] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 04/14/2016] [Accepted: 05/19/2016] [Indexed: 12/17/2022]
Abstract
This study was designed to examine the associations of an exaggerated systolic blood pressure (SBP) response to exercise with the indices of nitric oxide (NO) bioavailability, oxidative stress, inflammation and arterial stiffness in normotensive females. The subjects included 84 normotensive females without a history of cardiovascular disease or stroke who were not taking any medications. Each subject performed a multistage graded submaximal exercise stress test using an electric bicycle ergometer, and their blood pressure was measured at rest and during the last minute of each stage. The brachial-ankle pulse wave velocity, plasma nitrate/nitrite (NOx), plasma thiobarbituric acid-reactive substances, high-sensitivity C-reactive protein (hs-CRP) and fibrinogen levels and the white blood cell count were measured. An exaggerated SBP response to exercise was defined according to the criteria of the Framingham Study (peak SBP: ⩾190 mm Hg). An exaggerated SBP response to exercise was observed in 27 subjects. A multiple logistic regression analysis revealed that the hs-CRP (odds ratio (OR): 1.05, 95% confidence interval (CI): 1.03-1.07, P=0.015) and plasma NOx levels (OR: 0.92, 95% CI: 0.87-0.98, P=0.014) were significantly associated with an exaggerated SBP response to exercise. Furthermore, the percent change in SBP was found to be significantly associated with an increase in the hs-CRP (P for trend=0.006) and a decrease in the plasma NOx levels (P for trend=0.001). These results suggest that an exaggerated SBP response to exercise was associated with the NO bioavailability and inflammatory status in normotensive females.
Collapse
|