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Meng Z, Zhong X, Liang D, Ma X, Chen W, He X. MiR-143-5p regulates the proangiogenic potential of human dental pulp stem cells by targeting HIF-1α/RORA under hypoxia: A laboratory investigation in pulp regeneration. Int Endod J 2024. [PMID: 39126298 DOI: 10.1111/iej.14133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 07/21/2024] [Accepted: 07/22/2024] [Indexed: 08/12/2024]
Abstract
AIM Angiogenesis is a key event in the successful healing of pulp injuries, and hypoxia is the main stimulator of pulpal angiogenesis. In this study, we investigated the effect of hypoxia on the proangiogenic potential of human dental pulp stem cells (hDPSCs) and the role of miR-143-5p in the process. METHODOLOGY Human dental pulp stem cells were isolated, cultured and characterized in vitro. Cobalt chloride (CoCl2) was used to induce hypoxia in hDPSCs. CCK-8 and Transwell assays were used to determine the effect of hypoxia on hDPSCs proliferation and migration. Quantitative real-time polymerase chain reaction (qRT-PCR), Western blotting (WB) and ELISA were performed to assess the mRNA and protein levels of HIF-1α and angiogenic cytokines in hDPSCs. The effect of hypoxia on hDPSCs proangiogenic potential was measured in vitro using Matrigel tube formation and chick chorioallantoic membrane (CAM) assays. Recombinant lentiviral vectors were constructed to stably overexpress or inhibit miR-143-5p in hDPSCs, and the proangiogenic effects were assessed using qRT-PCR, WB, and tube formation assays. miR-143-5p target genes were identified and verified using bioinformatics prediction tools, dual-luciferase reporter assays and RNA pull-down experiments. Finally, a subcutaneous transplantation model in nude mice was used to determine the effects of hypoxia treatment and miR-143-5p overexpression/inhibition in hDPSCs in dental pulp regeneration. RESULTS Hypoxia promotes hDPSCs proliferation, migration and proangiogenic potential. The in vivo experiments showed that hypoxia treatment (50 and 100 μM CoCl2) promoted pulp angiogenesis and dentine formation. In contrast to the levels of proangiogenic factors, miR-143-5p levels decreased with increasing CoCl2 concentration. miR-143-5p inhibition significantly promoted proangiogenic potential of hDPSCs, whereas miR-143-5p overexpression inhibited angiogenesis in vitro. Dual-luciferase reporter assay identified retinoic acid receptor-related orphan receptor alpha (RORA) as an miR-143-5p target gene in hDPSCs. RNA pull-down experiments demonstrated that HIF-1α and RORA were pulled down by biotin-labelled miR-143-5p, and the levels of HIF-1α and RORA bound to miR-143-5p in the hypoxia group were lower than those in the normoxia group. Inhibition of miR-143-5p expression in hDPSCs promoted ectopic dental pulp tissue regeneration. CONCLUSIONS CoCl2-induced hypoxia promotes hDPSCs-driven paracrine angiogenesis and pulp regeneration. The inhibition of miR-143-5p upregulates the proangiogenic potential of hDPSCs under hypoxic conditions by directly targeting HIF-1α and RORA.
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Affiliation(s)
- Zijun Meng
- The Department of Operative Dentistry and Endodontology, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious Diseases, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Xiaoyi Zhong
- Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious Diseases, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- General Dental Clinic I, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Dan Liang
- The Department of Operative Dentistry and Endodontology, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious Diseases, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Xuemeng Ma
- Department of Oral Pathology, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Wenxia Chen
- The Department of Operative Dentistry and Endodontology, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious Diseases, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Xuan He
- The Department of Operative Dentistry and Endodontology, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
- Guangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious Diseases, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
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Nematisouldaragh D, Nguyen H, Rabinovich-Nikitin I. Agonists, inverse agonists, and antagonists as therapeutic approaches to manipulate retinoic acid-related orphan receptors. Can J Physiol Pharmacol 2024. [PMID: 38728749 DOI: 10.1139/cjpp-2024-0099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
Retinoic acid-related orphan receptors (RORs) serve as transcription factors that play a pivotal role in a myriad of physiological processes within the body. Their involvement extends to critical biological processes that confer protective effects in the heart, immune system, and nervous system, as well as contributing to the mitigation of several aggressive cancer types. These protective functions are attributed to ROR's regulation of key proteins and the management of various cellular processes, including autophagy, mitophagy, inflammation, oxidative stress, and glucose metabolism, highlighting the emerging need for pharmacological approaches to modulate ROR expression. Thus, the modulation of RORs is a rapidly growing area of research aimed not only at comprehending these receptors, but also at manipulating them to attain the desired physiological response. Despite the presence of natural ROR ligands, the development of synthetic agonists with high selectivity for these receptors holds substantial therapeutic potential. The exploration and advancement of such compounds can effectively target diseases associated with ROR dysregulation, thereby providing avenues for therapeutic interventions. Herein, we provide a comprehensive examination of the multifaceted role of ROR in diverse physiological and pathophysiological conditions, accompanied by an in-depth exploration of a spectrum of ROR agonists, inverse agonists, and antagonists.
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Affiliation(s)
- Darya Nematisouldaragh
- Department of Physiology and Pathophysiology, Rady College of Medicine, Max Rady Faculty of Health Sciences, The Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
| | - Huong Nguyen
- Department of Physiology and Pathophysiology, Rady College of Medicine, Max Rady Faculty of Health Sciences, The Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
| | - Inna Rabinovich-Nikitin
- Department of Physiology and Pathophysiology, Rady College of Medicine, Max Rady Faculty of Health Sciences, The Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
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Rani A. RAR-related orphan receptor alpha and the staggerer mice: a fine molecular story. Front Endocrinol (Lausanne) 2024; 14:1300729. [PMID: 38766309 PMCID: PMC11099308 DOI: 10.3389/fendo.2023.1300729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 12/15/2023] [Indexed: 05/22/2024] Open
Abstract
The retinoic acid-related orphan receptor alpha (RORα) protein first came into the limelight due to a set of staggerer mice, discovered at the Jackson Laboratories in the United States of America by Sidman, Lane, and Dickie (1962) and genetically deciphered by Hamilton et al. in 1996. These staggerer mice exhibited cerebellar defects, an ataxic gait, a stagger along with several other developmental abnormalities, compensatory mechanisms, and, most importantly, a deletion of 160 kilobases (kb), encompassing the RORα ligand binding domain (LBD). The discovery of the staggerer mice and the subsequent discovery of a loss of the LBD within the RORα gene of these mice at the genetic level clearly indicated that RORα's LBD played a crucial role in patterning during embryogenesis. Moreover, a chance study by Roffler-Tarlov and Sidman (1978) noted reduced concentrations of glutamic acid levels in the staggerer mice, indicating a possible role for the essence of a nutritionally balanced diet. The sequential organisation of the building blocks of intact genes, requires the nucleotide bases of deoxyribonucleic acid (DNA): purines and pyrimidines, both of which are synthesized, upon a constant supply of glutamine, an amino acid fortified in a balanced diet and a byproduct of the carbohydrate and lipid metabolic pathways. A nutritionally balanced diet, along with a metabolic "enzymatic machinery" devoid of mutations/aberrations, was essential in the uninterrupted transcription of RORα during embryogenesis. In addition to the above, following translation, a ligand-responsive RORα acts as a "molecular circadian regulator" during embryogenesis and not only is expressed selectively and differentially, but also promotes differential activity depending on the anatomical and pathological site of its expression. RORα is highly expressed in the central nervous system (CNS) and the endocrine organs. Additionally, RORα and the clock genes are core components of the circadian rhythmicity, with the expression of RORα fluctuating in a night-day-night sigmoidal pattern and undoubtedly serves as an endocrine-like, albeit "molecular-circadian regulator". Melatonin, a circadian hormone, along with tri-iodothyronine and some steroid hormones are known to regulate RORα-mediated molecular activity, with each of these hormones themselves being regulated rhythmically by the hypothalamic-pituitary axis (HPA). The HPA regulates the circadian rhythm and cyclical release of hormones, in a self-regulatory feedback loop. Irregular sleep-wake patterns affect circadian rhythmicity and the ability of the immune system to withstand infections. The staggerer mice with their thinner bones, an altered skeletal musculature, an aberrant metabolic profile, the ataxic gait and an underdeveloped cerebellar cortex; exhibited compensatory mechanisms, that not only allowed the survival of the staggerer mice, but also enhanced protection from microbial invasions and resistance to high-fat-diet induced obesity. This review has been compiled in its present form, more than 14 years later after a chromatin immunoprecipitation (ChIP) cloning and sequencing methodology helped me identify signal transducer and activator of transcription 5 (STAT5) target sequences, one of which was mapped to the first intron of the RORα gene. The 599-base-long sequence containing one consensus TTCNNNGAA (TTCN3GAA) gamma-activated sequence (GAS) and five other non-consensus TTN5AA sequences had been identified from the clones isolated from the STAT5 target sites (fragments) in human phytohemagglutinin-activated CD8+ T lymphocytes, during my doctoral studies between 2006 and 2009. Most importantly, preliminary studies noted a unique RORα expression profile, during a time-course study on the ribonucleic acid (RNA), extracted from human phytohemagglutinin (PHA) activated CD8+ T lymphocytes stimulated with interleukin-2 (IL-2). This review mainly focuses on the "staggerer mice" with one of its first roles materialising during embryogenesis, a molecular-endocrine mediated circadian-like regulatory process.
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Affiliation(s)
- Aradhana Rani
- Medical Biochemistry, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Pondicherry, India
- Human Resource Development and Management, Indian Institute of Technology (IIT) Kharagpur, West Bengal, India
- Immunology, King’s College London, London, United Kingdom
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Wen Y, Su E, Xu L, Menez S, Moledina DG, Obeid W, Palevsky PM, Mansour SG, Devarajan P, Cantley LG, Cahan P, Parikh CR. Analysis of the human kidney transcriptome and plasma proteome identifies markers of proximal tubule maladaptation to injury. Sci Transl Med 2023; 15:eade7287. [PMID: 38091407 DOI: 10.1126/scitranslmed.ade7287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/20/2023] [Indexed: 12/18/2023]
Abstract
Acute kidney injury (AKI) is a major risk factor for long-term adverse outcomes, including chronic kidney disease. In mouse models of AKI, maladaptive repair of the injured proximal tubule (PT) prevents complete tissue recovery. However, evidence for PT maladaptation and its etiological relationship with complications of AKI is lacking in humans. We performed single-nucleus RNA sequencing of 120,985 nuclei in kidneys from 17 participants with AKI and seven healthy controls from the Kidney Precision Medicine Project. Maladaptive PT cells, which exhibited transcriptomic features of dedifferentiation and enrichment in pro-inflammatory and profibrotic pathways, were present in participants with AKI of diverse etiologies. To develop plasma markers of PT maladaptation, we analyzed the plasma proteome in two independent cohorts of patients undergoing cardiac surgery and a cohort of marathon runners, linked it to the transcriptomic signatures associated with maladaptive PT, and identified nine proteins whose genes were specifically up- or down-regulated by maladaptive PT. After cardiac surgery, both cohorts of patients had increased transforming growth factor-β2 (TGFB2), collagen type XXIII-α1 (COL23A1), and X-linked neuroligin 4 (NLGN4X) and had decreased plasminogen (PLG), ectonucleotide pyrophosphatase/phosphodiesterase 6 (ENPP6), and protein C (PROC). Similar changes were observed in marathon runners with exercise-associated kidney injury. Postoperative changes in these markers were associated with AKI progression in adults after cardiac surgery and post-AKI kidney atrophy in mouse models of ischemia-reperfusion injury and toxic injury. Our results demonstrate the feasibility of a multiomics approach to discovering noninvasive markers and associating PT maladaptation with adverse clinical outcomes.
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Affiliation(s)
- Yumeng Wen
- Division of Nephrology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Emily Su
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Leyuan Xu
- Section of Nephrology, Department of Medicine, Yale School of Medicine, New Haven, CT 06504, USA
| | - Steven Menez
- Division of Nephrology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Dennis G Moledina
- Section of Nephrology, Department of Medicine, Yale School of Medicine, New Haven, CT 06504, USA
| | - Wassim Obeid
- Division of Nephrology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Paul M Palevsky
- Renal-Electrolyte Division, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
- Kidney Medicine Section, Medical Service, VA Pittsburgh Healthcare System, Pittsburgh, PA 15240, USA
| | - Sherry G Mansour
- Section of Nephrology, Department of Medicine, Yale School of Medicine, New Haven, CT 06504, USA
| | - Prasad Devarajan
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Lloyd G Cantley
- Section of Nephrology, Department of Medicine, Yale School of Medicine, New Haven, CT 06504, USA
| | - Patrick Cahan
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Chirag R Parikh
- Division of Nephrology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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He T, Pang S, Wang H, Yun H, Hao X, Jia L, Liu H, Wang D, Wang D, Xu H, Jie Q, Yang L, Zheng C. Drugging the circadian clock feedback cycle to ameliorate cartilage degeneration. FEBS J 2022; 289:6643-6658. [DOI: 10.1111/febs.16601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 07/19/2022] [Accepted: 07/27/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Ting He
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research Northwestern Polytechnical University Xi'an China
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Siyi Pang
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research Northwestern Polytechnical University Xi'an China
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Huanbo Wang
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Haitao Yun
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Xue Hao
- Department of Pediatric Orthopedic, Honghui Hospital, Xi'an Jiaotong University College of Medicine Xi'an China
| | - Liyuan Jia
- Laboratory of Tissue Engineering, College of Life Science Northwest University Xi'an China
| | - He Liu
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Di Wang
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Dong Wang
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Huiyun Xu
- School of Life Sciences Northwestern Polytechnical University Xi'an China
| | - Qiang Jie
- Department of Pediatric Orthopedic, Honghui Hospital, Xi'an Jiaotong University College of Medicine Xi'an China
| | - Liu Yang
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research Northwestern Polytechnical University Xi'an China
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
| | - Chao Zheng
- Institute of Orthopedic Surgery, Xijing Hospital Fourth Military Medical University Xi'an China
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Yu Y, Zhu T. RAR-Related Orphan Receptor: An Accelerated Preeclampsia Progression by Activating the JAK/STAT3 Pathway. Yonsei Med J 2022; 63:554-563. [PMID: 35619579 PMCID: PMC9171667 DOI: 10.3349/ymj.2022.63.6.554] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 01/13/2022] [Accepted: 02/09/2022] [Indexed: 11/27/2022] Open
Abstract
PURPOSE To investigate the effect and underlying mechanism of RAR related orphan receptor A (RORA) on preeclampsia (PE). MATERIALS AND METHODS Differentially expressed genes (DEGs) in four datasets were obtained by using the Venn diagram method. RORA mRNA and protein expressions were detected by qRT-PCR, western blot, and immunohistochemistry. HTR-8/SVneo cell viability, proliferation, invasion, migration, and angiogenesis were detected by CCK-8 assay, EdU assay, Transwell, wound healing assay, and tube formation assay, respectively. The concentration of Ang-1 in cells was assessed using available ELISA kit. Epithelial-mesenchymal transition, proliferation, and angiogenesis-related proteins were detected by western blot. GSEA analysis were performed for common DEGs, and the expression of enriched pathway-related proteins was also detected. RESULTS The expression of RORA was increased in PE tissue and HTR-8/SVneo cells. Silencing RORA could promote the migration, invasion, epithelial-mesenchymal transition, proliferation, and angiogenesis of hypoxia-treated HTR-8/SVneo cells. Mechanistically, RORA contributed to the deterioration of PE by activating the JAK2/STAT3 signaling pathway to promote cell proliferation, migration, invasion, and angiogenesis. CONCLUSION RORA was up-regulated in PE and affected HTR-8/SVneo cell proliferation, invasion, migration, apoptosis, and angiogenesis via the JAK2/STAT3 signaling pathway. This provided a novel strategy for the prevention and treatment of PE.
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Affiliation(s)
- Ying Yu
- Department of Obstetrics, Zhangqiu District People's Hospital, Jinan, Shandong, China
| | - Tongyu Zhu
- Department of Obstetrics, 960th Hospital of the Joint Logistics Support Force of the Chinese People's Liberation Army, Jinan, Shandong, China.
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Li D, Liu G, Wu Y. RORA alleviates LPS-induced apoptosis of renal epithelial cells by promoting PGC-1α transcription. Clin Exp Nephrol 2022; 26:512-521. [PMID: 35195816 PMCID: PMC9114077 DOI: 10.1007/s10157-022-02184-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/13/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To explore the effect of RORA on LPS-induced renal epithelial cell apoptosis and the underlying mechanism. METHODS LPS-treated HK-2 cells were established as a cellular model of acute kidney injury. The expression of RORA or/and PGC-1α in LPS-induced HK-2 cells was altered by transfection. qRT-PCR and Western blotting were used to detect the expression changes of RORA and PGC-1α. ELISA was performed to detect the expression of IL-1β and IL-6 and the activity of caspase-3. Western blotting was applied for visualization of cleaved caspase-3. CCK-8 and flow cytometry were used to assess cell proliferation and apoptosis. Dual-luciferase reporter and ChIP-qPCR were utilized to verify the binding of RORA to PGC-1α promoter. RESULTS LPS treatment decreased the expression of RORA and PGC-1α and increased that of cleaved caspase-3 in HK-2 cells. Also, LPS treatment inhibited HK-2 cell proliferation and promoted HK-2 cell apoptosis and secretion of IL-1β and IL-6. Overexpression of RORA or PGC-1α eliminated the adverse effects of LPS treatment in HK-2 cells. RORA drove the transcription of PGC-1α by binding PGC-1α promoter. Knockdown of PGC-1α offset the reduction in HK-2 cell injury caused by overexpression of RORA. CONCLUSION RORA reduces LPS-induced apoptosis of renal epithelial cells by promoting PGC-1α transcription.
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Affiliation(s)
- Dayong Li
- Department of Nephrology, The First Hospital of Changsha, No. 311 Yingpan Road, Changsha, 410005, Hunan, People's Republic of China
| | - Guanlan Liu
- Department of Nephrology, The First Hospital of Changsha, No. 311 Yingpan Road, Changsha, 410005, Hunan, People's Republic of China
| | - Yundou Wu
- Department of Nephrology, The First Hospital of Changsha, No. 311 Yingpan Road, Changsha, 410005, Hunan, People's Republic of China.
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Matsuoka H, Michihara A. Identification of the RORα Transcriptional Network Contributes to the Search for Therapeutic Targets in Atherosclerosis. Biol Pharm Bull 2021; 44:1607-1616. [PMID: 34719639 DOI: 10.1248/bpb.b21-00426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The retinoic acid receptor-related orphan receptor α (RORα) is involved in the regulation of several physiological processes, including development, metabolism, and circadian rhythm. RORα-deficient mice display profound atherosclerosis, in which hypoalphalipoproteinemia is reportedly associated with decreased plasma levels of high-density lipoprotein, increased levels of inflammatory cytokines, and ischemia/reperfusion-induced damage. The recent characterization of endogenous ligands (including cholesterol, oxysterols, provitamin D3, and their derivatives), mediators, and initiation complexes associated with the transcriptional regulation of these orphan nuclear receptors has facilitated the development of synthetic ligands. These findings have also highlighted the potential of application of RORα as a therapeutic target for several diseases, including diabetes, dyslipidemia, and atherosclerosis. In this review, the current literature related to the structure and function of RORα, its genetic inter-individual differences, and its potential as a therapeutic target in atherosclerosis is discussed.
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Affiliation(s)
- Hiroshi Matsuoka
- Laboratory of Genomic Function and Pathophysiology, Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University
| | - Akihiro Michihara
- Laboratory of Genomic Function and Pathophysiology, Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University
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Lee JM, Kim H, Baek SH. Unraveling the physiological roles of retinoic acid receptor-related orphan receptor α. Exp Mol Med 2021; 53:1278-1286. [PMID: 34588606 PMCID: PMC8492739 DOI: 10.1038/s12276-021-00679-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 12/20/2022] Open
Abstract
Retinoic acid receptor-related orphan receptor-α (RORα) is a member of the orphan nuclear receptor family and functions as a transcriptional activator in response to circadian changes. Circadian rhythms are complex cellular mechanisms regulating diverse metabolic, inflammatory, and tumorigenic gene expression pathways that govern cyclic cellular physiology. Disruption of circadian regulators, including RORα, plays a critical role in tumorigenesis and facilitates the development of inflammatory hallmarks. Although RORα contributes to overall fitness among anticancer, anti-inflammatory, lipid homeostasis, and circadian clock mechanisms, the molecular mechanisms underlying the mode of transcriptional regulation by RORα remain unclear. Nonetheless, RORα has important implications for pharmacological prevention of cancer, inflammation, and metabolic diseases, and understanding context-dependent RORα regulation will provide an innovative approach for unraveling the functional link between cancer metabolism and rhythm changes.
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Affiliation(s)
- Ji Min Lee
- Department of Molecular Bioscience, College of Biomedical Sciences, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Hyunkyung Kim
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea. .,BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea.
| | - Sung Hee Baek
- Creative Research Initiatives Center for Epigenetic Code and Diseases, Department of Biological Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
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Day-Time Declamping Is Associated with Better Outcomes in Kidney Transplantation: The Circarein Study. J Clin Med 2021; 10:jcm10112322. [PMID: 34073444 PMCID: PMC8198093 DOI: 10.3390/jcm10112322] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/15/2021] [Accepted: 05/22/2021] [Indexed: 11/17/2022] Open
Abstract
Despite improvements in organ preservation techniques and efforts to minimize the duration of cold ischemia, ischemia–reperfusion (IR) injury remains associated with poor graft function and long-term survival in kidney transplantation. We recently demonstrated a clinically significant day-time variation in myocardial tolerance to IR, transcriptionally orchestrated by the circadian clock. Patient and graft post-transplant survival were studied in a cohort of 10,291 patients first transplanted between 2006 and 2017 to test whether kidney graft tolerance to IR depends on the time-of-the-day of clamping/declamping, and thus impacts graft and patient survival. Post-transplant 1- and 3-year survival decreased with increasing ischemia duration. Time-of-the-day of clamping did not influence outcomes. However, night-time (vs. day-time) declamping was associated with a significantly worse post-transplant survival. After adjustment for other predictors, night-time (vs. day-time) declamping remained associated with a worse 1-year (HR = 1.26 (1.08–1.47), p = 0.0028 by Cox multivariable analysis) and 3-year (HR = 1.14 (1.02–1.27), p = 0.021) outcome. Interestingly, the deleterious impact of prolonged ischemia time (>15 h) was partially compensated by day-time (vs. night-time) declamping. Compared to night-time declamping, day-time declamping was associated with a better prognosis of kidney transplantation despite a longer duration of cold ischemia.
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Ma H, Kang J, Fan W, He H, Huang F. ROR: Nuclear Receptor for Melatonin or Not? Molecules 2021; 26:molecules26092693. [PMID: 34064466 PMCID: PMC8124216 DOI: 10.3390/molecules26092693] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/28/2021] [Accepted: 05/03/2021] [Indexed: 12/14/2022] Open
Abstract
Whether the retinoic acid-related orphan receptor (ROR) is a nuclear receptor of melatonin remains controversial. ROR is inextricably linked to melatonin in terms of its expression, function, and mechanism of action. Additionally, studies have illustrated that melatonin functions analogous to ROR ligands, thereby modulating the transcriptional activity of ROR. However, studies supporting these interactions have since been withdrawn. Furthermore, recent crystallographic evidence does not support the view that ROR is a nuclear receptor of melatonin. Some other studies have proposed that melatonin indirectly regulates ROR activity rather than directly binding to ROR. This review aims to delve into the complex relationship of the ROR receptor with melatonin in terms of its structure, expression, function, and mechanism. Thus, we provide the latest evidence and views on direct binding as well as indirect regulation of ROR by melatonin, dissecting both viewpoints in-depth to provide a more comprehensive perspective on this issue.
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Affiliation(s)
- Haozhen Ma
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China; (H.M.); (J.K.); (W.F.)
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Jun Kang
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China; (H.M.); (J.K.); (W.F.)
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Wenguo Fan
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China; (H.M.); (J.K.); (W.F.)
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Hongwen He
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
- Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510080, China
- Correspondence: (H.H.); (F.H.); Tel.: +86-20-8733-0570 (H.H. & F.H.)
| | - Fang Huang
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China; (H.M.); (J.K.); (W.F.)
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
- Correspondence: (H.H.); (F.H.); Tel.: +86-20-8733-0570 (H.H. & F.H.)
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12
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Wang Z, Sun R, Wang G, Chen Z, Li Y, Zhao Y, Liu D, Zhao H, Zhang F, Yao J, Tian X. SIRT3-mediated deacetylation of PRDX3 alleviates mitochondrial oxidative damage and apoptosis induced by intestinal ischemia/reperfusion injury. Redox Biol 2019; 28:101343. [PMID: 31655428 PMCID: PMC6820261 DOI: 10.1016/j.redox.2019.101343] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 10/06/2019] [Accepted: 10/11/2019] [Indexed: 12/11/2022] Open
Abstract
Background Hydrogen peroxide (H2O2)-induced mitochondrial oxidative damage is critical to intestinal ischemia/reperfusion (I/R) injury, and PRDX3 is an efficient H2O2 scavenger that protects cells from mitochondrial oxidative damage and apoptosis. However, the function of PRDX3 in intestinal I/R injury is unclear. The aim of this study was to investigate the precise mechanism underlying the involvement of PRDX3 in intestinal I/R injury. Methods An intestinal I/R model was established in mice with superior mesenteric artery occlusion, and Caco-2 cells were subjected to hypoxia/reoxygenation (H/R) for the in vivo simulation of I/R. Results PRDX3 expression was decreased during intestinal I/R injury, and PRDX3 overexpression significantly attenuated H/R-induced mitochondrial oxidative damage and apoptosis in Caco-2 cells. The level of acetylated PRDX3 was clearly increased both in vivo and in vitro. The inhibition of SIRTs by nicotinamide (NAM) increased the level of acetylated PRDX3 and impaired the antioxidative activity of PRDX3. Furthermore, NAM did not increase the acetylation of PRDX3 in sirtuin-3 (SIRT3)-knockdown Caco-2 cells. Importantly, PRDX3 acetylation was increased in mice lacking SIRT3, and this effect was accompanied by serious mitochondrial oxidative damage, apoptosis and remote organ damage after intestinal I/R injury. We screened potential sites of PRDX3 acetylation in the previously reported acetylproteome through immunoprecipitation (IP) experiments and found that SIRT3 deacetylates K253 on PRDX3 in Caco-2 cells. Furthermore, PRDX3 with the lysine residue K253 mutated to arginine (K253R) increased its dimerization in Caco-2 cells after subjected to 12 h hypoxia and followed 4 h reoxygenation. Caco-2 cells transfected with the K253R plasmid exhibited notably less mitochondrial damage and apoptosis, and transfection of the K253Q plasmid abolished the protective effect of PRDX3 overexpression. Analysis of ischemic intestines from clinical patients further verified the correlation between SIRT3 and PRDX3. Conclusions PRDX3 is a key protective factor for intestinal I/R injury, and SIRT3-mediated PRDX3 deacetylation can alleviate intestinal I/R-induced mitochondrial oxidative damage and apoptosis.
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Affiliation(s)
- Zhanyu Wang
- Department of Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Ruimin Sun
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Guangzhi Wang
- Department of Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Zhao Chen
- Department of Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Yang Li
- Department of Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Yan Zhao
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Deshun Liu
- Department of Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Huanyu Zhao
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Feng Zhang
- Department of Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Jihong Yao
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China.
| | - Xiaofeng Tian
- Department of Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China.
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13
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Han S, Li Z, Han F, Jia Y, Qi L, Wu G, Cai W, Xu Y, Li C, Zhang W, Hu D. ROR alpha protects against LPS-induced inflammation by down-regulating SIRT1/NF-kappa B pathway. Arch Biochem Biophys 2019; 668:1-8. [PMID: 31071300 DOI: 10.1016/j.abb.2019.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/15/2019] [Accepted: 05/05/2019] [Indexed: 02/07/2023]
Abstract
Systemic inflammatory response syndrome (SIRS) is associated with excessive inflammatory response, however, the pathophysiology of inflammation is poorly understood. The retinoid-related orphan receptor α (RORα) is a key inflammatory regulator, but the mechanisms underlying its role remain unclear. The aim of this study was to investigate how RORα was involved in the regulation of inflammatory response. Here we put forward a hypothesis that RORα might negatively regulate inflammatory response by controlling silent information regulator Sirtuin 1 (SIRT1) expression. Stimulation of macrophages in vitro with LPS and LPS administration in vivo were used to explore the function of RORα and the relationship between RORα and SIRT1. We found that the level of RORα was suppressed in macrophages stimulated with LPS and overexpression or knockdown of RORα by transfection with lentivirus or siRNAs significantly decreased or increased, respectively, the pro-inflammatory cytokines IL-1β, TNF, IL-6 and MCP-1. Importantly, overexpression of RORα suppressed inflammation and alleviated LPS-induced organ injury in vivo. Further study showed that RORα could regulate SIRT1 expression and, consequently, affect deacetyation and nuclear translocation of nuclear factor-kappa B (NF-κB) subunit p65. Moreover, the activation of SIRT1 by its specific agonist, SR1720, could reduce the expression of proinflammatory cytokines in RORα knockdown macrophages stimulated with LPS. In conclusion, we demonstrated that RORα could alleviate LPS-induced inflammation and organ injury both in vivo and in vitro by blocking NF-κB p65 nuclear translocation and restricting acetylation of NF-κB p65 at lysine 310 via the regulation of SIRT1 expression. Targeting RORα might be a promising therapeutic strategy to regulate inflammatory disorders.
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Affiliation(s)
- Shichao Han
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Zhenzhen Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Fu Han
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Yanhui Jia
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Lijun Qi
- Department of Anesthesiology, Heze Municipal Hospital, Heze, 274031, Shandong, China
| | - Gaofeng Wu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Weixia Cai
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Yongqiang Xu
- Department of Radiology, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China
| | - Cong Li
- Department of Anesthesiology, Heze Municipal Hospital, Heze, 274031, Shandong, China
| | - Wanfu Zhang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China.
| | - Dahai Hu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, No.169 Changle West Road, Xi'an, 710032, Shaanxi, China.
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