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Coverdell TC, Abbott SBG, Campbell JN. Molecular cell types as functional units of the efferent vagus nerve. Semin Cell Dev Biol 2024; 156:210-218. [PMID: 37507330 PMCID: PMC10811285 DOI: 10.1016/j.semcdb.2023.07.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 07/20/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023]
Abstract
The vagus nerve vitally connects the brain and body to coordinate digestive, cardiorespiratory, and immune functions. Its efferent neurons, which project their axons from the brainstem to the viscera, are thought to comprise "functional units" - neuron populations dedicated to the control of specific vagal reflexes or organ functions. Previous research indicates that these functional units differ from one another anatomically, neurochemically, and physiologically but have yet to define their identity in an experimentally tractable way. However, recent work with genetic technology and single-cell genomics suggests that genetically distinct subtypes of neurons may be the functional units of the efferent vagus. Here we review how these approaches are revealing the organizational principles of the efferent vagus in unprecedented detail.
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Affiliation(s)
- Tatiana C Coverdell
- Biomedical Sciences Graduate Program, University of Virginia, Charlottesville, VA 22903, USA
| | - Stephen B G Abbott
- Department of Pharmacology, University of Virginia, Charlottesville, VA 22903, USA
| | - John N Campbell
- Department of Biology, University of Virginia, Charlottesville, VA 22903, USA.
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2
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Trifluoro-icaritin ameliorates spared nerve injury-induced neuropathic pain by inhibiting microglial activation through α7nAChR-mediated blockade of BDNF/TrkB/KCC2 signaling in the spinal cord of rats. Biomed Pharmacother 2023; 157:114001. [PMID: 36375307 DOI: 10.1016/j.biopha.2022.114001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/05/2022] [Accepted: 11/09/2022] [Indexed: 11/13/2022] Open
Abstract
Neuropathic pain is still a serious and unsolved health problem. Activation of α7 nicotinic acetylcholine receptor (α7nAChR) is known to modulate neuropathic pain by inhibiting microglial activation and BDNF/TrkB/KCC2 signaling. We previously identified that trifluoro-icaritin (ICTF) has an attenuated effect on spared nerve injury (SNI)-induced neuropathic pain, but its potential mechanisms remain unknown. Here, the pain-related behaviors were determined by paw withdrawal threshold (PWT), CatWalk gait analysis, rotarod test, open field test and elevated plus maze test. The expression of pain-related signal molecules was evaluated by Western blot and immunofluorescence staining. The results showed that ICTF (5.0 mg/kg, i.p.) successfully relieved SNI-induced mechanical allodynia and anxiety-like behavior, we subsequently found there existed either positive or negative correlation between mechanical allodynia and gait parameters or rotating speed following ICTF treatment. Moreover, ICTF not only enhanced the expression of spinal α7nAChR, KCC2, CD206 and IL-10, but also decreased the levels of spinal BDNF, TrkB, CD11b, Iba-1, CD40 and IL-1β in SNI rats. Conversely, α7nAChR antagonist α-Bgtx (I.T.) effectively reversed the inhibitory effects of ICTF on SNI rats, resulting in a remarkable improvement of mechanical allodynia, activation of microglia. and suppression of α7nAChR-mediated BDNF/TrkB/KCC2 signaling. Additionally, exogenous BDNF (I.T.) dramatically abrogated both blockade of BDNF/TrkB/KCC2 cascade and alleviation of mechanical allodynia by ICTF treatment. Altogether, the study highlighted that ICTF could relieve SNI-induced neuropathic pain by suppressing microglial activation via α7nAChR-mediated inhibition of BDNF/TrkB/KCC2 signaling in the spinal cord, suggesting that ICTF may be served as a possible painkiller against neuropathic pain.
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3
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Liu H, Hu L, Zuo L, Ning G, Shi L, Xu Z, Ren W. Short-term exposure of HFD depresses intestinal cholinergic anti-inflammatory activity through hypothalamic inflammation in mice. J Nutr Biochem 2023; 111:109151. [PMID: 36064087 DOI: 10.1016/j.jnutbio.2022.109151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 05/16/2022] [Accepted: 08/19/2022] [Indexed: 11/24/2022]
Abstract
High-fat diet (HFD) exposure has been proven to impair vagus nerve function. However, it is not yet known whether the HFD challenge impacts vagal efferent-based intestinal cholinergic anti-inflammation activity. This investigation aims to evaluate the effect of HFD on intestinal cholinergic anti-inflammatory activity in mice. Mice with or without intracerebroventricular treatment with an antibody against toll-like receptor 4 (TLR4) were fed with HFD or standard chow for 2 weeks. Vagus nerve-based anti-inflammatory activity was analyzed by heart rate variability. Acetylcholine (ACh) content, nicotinic acetylcholine receptor α7 subtype (α7nAChR), and pro-inflammatory cytokines were analyzed by biochemical kits or qRT-PCR. HFD feeding mice exhibit a significant increase in high frequency (HF) and a decrease in the ratio of low frequency/HF, which were accompanied by lower ACh levels and α7nAChR mRNA expression in the intestinal segments. However, anti-TLR4 antibody-treated HFD mice showed normal ACh levels and α7nAChR mRNA expression in the intestinal segments. Moreover, TNF-α production in small intestine was significantly reduced in HFD + antibody group compared with HFD + vehicle group. Collectively, our present results reveal that HFD challenge depresses intestinal cholinergic anti-inflammatory activity, which is mediated by hypothalamic inflammation. Impairment of intestinal cholinergic anti-inflammatory pathway is the cause of intestinal low-grade inflammation by HFD consumption.
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Affiliation(s)
- Huiying Liu
- Department of Endocrinology, The First Affiliated Hospital of North University of Hebei, Zhangjiakou, Hebei, China.
| | - Limei Hu
- Department of Endocrinology, The First Affiliated Hospital of North University of Hebei, Zhangjiakou, Hebei, China
| | - Lijuan Zuo
- Department of Endocrinology, The First Affiliated Hospital of North University of Hebei, Zhangjiakou, Hebei, China
| | - Gaijun Ning
- Department of Endocrinology, The First Affiliated Hospital of North University of Hebei, Zhangjiakou, Hebei, China
| | - Li Shi
- Department of Endocrinology, The First Affiliated Hospital of North University of Hebei, Zhangjiakou, Hebei, China
| | - Zhengrong Xu
- Department of Endocrinology, The First Affiliated Hospital of North University of Hebei, Zhangjiakou, Hebei, China
| | - Weidong Ren
- Department of Endocrinology, The First Affiliated Hospital of North University of Hebei, Zhangjiakou, Hebei, China
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Li M, Zhao Y, Zhang B, Wang X, Zhao T, Zhao T, Ren W. Hyperglycemia remission after Roux-en-Y gastric bypass: Implicated to altered monocyte inflammatory response in type 2 diabetes rats. Peptides 2022; 158:170895. [PMID: 36240981 DOI: 10.1016/j.peptides.2022.170895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/20/2022] [Accepted: 10/08/2022] [Indexed: 11/07/2022]
Abstract
Hyperglycemia remission by metabolic surgery is implicated in the resolution of low-grade inflammation in type 2 diabetes mellitus (T2DM). However, whether this beneficial effect of metabolic surgery is related to improving monocyte inflammatory response remains undefined. This investigation is addressed to evaluate this relationship. For this purpose, T2DM rats were subjected to Roux-en-Y gastric bypass (RYGB) and/or monocyte depletion or splenic sympathetic denervation. Fasting blood glucose (FBG), plasma tumor necrosis factor-alpha (TNF-α) and interleukin-1 beta (IL-1β) were measured, and monocyte inflammatory response was assessed in vitro. The data showed that RYGB significantly reduced lipopolysaccharide (LPS)-induced release of TNF-α and IL-1β from peripheral monocytes while alleviating hyperglycemia and reducing plasma TNF-α and IL-1β levels. Hyperglycemia resulting from monocyte depletion by injection of clodronate liposomes resolved one week earlier than vehicle control after RYGB. Splenic denervation abrogated the glucose-lowering effect and decreased LPS-stimulated TNF-α and IL-1β release from monocytes following RYGB. Overall, our results reveal that a marked reduction of monocyte inflammatory response after RYGB contributes to hyperglycemia remission in T2DM rats. The beneficial effect of RYGB is mediated through vagal-spleen axis anti-inflammatory activity.
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Affiliation(s)
- Mingxia Li
- Department of Endocrinology, The First Hospital of Hebei North University, Zhangjiakou 075000, China
| | - Yifeng Zhao
- Department of Gastrointestinal Tumor Surgery, The First Hospital of Hebei North University, Zhangjiakou 075000, China
| | - Bingjie Zhang
- Internal Medicine of Traditional Chinese Medicine, The First Hospital of Zhangjiakou, Zhangjiakou 075000, China
| | - Xiaofang Wang
- Department of Endocrinology, The First Hospital of Hebei North University, Zhangjiakou 075000, China
| | - Ting Zhao
- Department of Endocrinology, The First Hospital of Hebei North University, Zhangjiakou 075000, China
| | - Tiejun Zhao
- College of Medical Biochemistry, Hebei North University, Zhangjiakou 075000, China
| | - Weidong Ren
- Department of Endocrinology, The First Hospital of Hebei North University, Zhangjiakou 075000, China.
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5
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Meade E, Garvey M. The Role of Neuro-Immune Interaction in Chronic Pain Conditions; Functional Somatic Syndrome, Neurogenic Inflammation, and Peripheral Neuropathy. Int J Mol Sci 2022; 23:ijms23158574. [PMID: 35955708 PMCID: PMC9369187 DOI: 10.3390/ijms23158574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/30/2022] [Accepted: 07/31/2022] [Indexed: 02/01/2023] Open
Abstract
Functional somatic syndromes are increasingly diagnosed in chronically ill patients presenting with an array of symptoms not attributed to physical ailments. Conditions such as chronic fatigue syndrome, fibromyalgia syndrome, or irritable bowel syndrome are common disorders that belong in this broad category. Such syndromes are characterised by the presence of one or multiple chronic symptoms including widespread musculoskeletal pain, fatigue, sleep disorders, and abdominal pain, amongst other issues. Symptoms are believed to relate to a complex interaction of biological and psychosocial factors, where a definite aetiology has not been established. Theories suggest causative pathways between the immune and nervous systems of affected individuals with several risk factors identified in patients presenting with one or more functional syndromes. Risk factors including stress and childhood trauma are now recognised as important contributors to chronic pain conditions. Emotional, physical, and sexual abuse during childhood is considered a severe stressor having a high prevalence in functional somatic syndrome suffers. Such trauma permanently alters the biological stress response of the suffers leading to neuroexcitatory and other nerve issues associated with chronic pain in adults. Traumatic and chronic stress results in epigenetic changes in stress response genes, which ultimately leads to dysregulation of the hypothalamic-pituitary axis, the autonomic nervous system, and the immune system manifesting in a broad array of symptoms. Importantly, these systems are known to be dysregulated in patients suffering from functional somatic syndrome. Functional somatic syndromes are also highly prevalent co-morbidities of psychiatric conditions, mood disorders, and anxiety. Consequently, this review aims to provide insight into the role of the nervous system and immune system in chronic pain disorders associated with the musculoskeletal system, and central and peripheral nervous systems.
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Affiliation(s)
- Elaine Meade
- Department of Life Science, Atlantic Technological University, F91 YW50 Sligo, Ireland;
| | - Mary Garvey
- Department of Life Science, Atlantic Technological University, F91 YW50 Sligo, Ireland;
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Atlantic Technological University, F91 YW50 Sligo, Ireland
- Correspondence:
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6
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Zhou M, Wang L, Wang Z, Chang X, Zhu X. Celiac vagus nerve mediates expression of the acetylcholine receptor α7nAChR on monocytes in the spleen. Biochem Biophys Res Commun 2022; 613:174-179. [PMID: 35597124 DOI: 10.1016/j.bbrc.2022.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 05/02/2022] [Indexed: 12/16/2022]
Abstract
The spleen is required for the vagal cholinergic anti-inflammatory activity to maintain systemic immune homeostasis, but the underlying mechanism of this function is not fully understood yet. We hypothesized that vagus nerve mediates alpha 7 nicotinic acetylcholine receptor (α7nAChR) expression in monocytes, an essential regulator of cholinergic anti-inflammatory activity, and the spleen is essential site for this process. To verify this hypothesis, mice were subjected to splenectomy or celiac vagotomy. The level of α7nAChR expression in circulating monocytes was analyzed by real-time PCR. Impact of α7nAChR agonist PNU282987 on LPS-evoked release of TNF-α and IL-1β from circulating monocytes was assessed by ELISA. The effect of norepinephrine (NE), acetylcholine (ACh) and neuregulin-1 (NRG-1) on α7nAChR expression was detected by real-time PCR. We found that splenectomy or celiac vagotomy abrogated α7nAChR expression in circulating monocytes. LPS-induced release of TNF-α and IL-1β from these monocytes was not alleviated significantly by PNU282987 as compared with that of sham mice. NE and ACh addition fails to stimulate α7nAChR expression, but, NRG-1 treatment can significantly induce α7nAChR expression in these monocytes compared with untreated cells in vitro. Overall, our results reveal that celiac vagus nerve mediates α7nAChR expression in monocytes, and the spleen is indispensable site for this process.
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Affiliation(s)
- Mengxiao Zhou
- Key Laboratory of Clinical Diagnostics, North University of Hebei, Zhangjiakou, 075000, China; Department of Blood Transfusion, The Forth Hospital of Shijiazhuang, Shijiazhuang, 050000, China
| | - Lijuan Wang
- Department of Day Care Unit, Gansu Hospital of Traditional Chinese Medicine, Lanzhou, 730030, China
| | - Zihan Wang
- Department of Basic Medicine, Medical University of Zunyi, Zunyi, 563000, China
| | - Xiaotong Chang
- Key Laboratory of Clinical Diagnostics, North University of Hebei, Zhangjiakou, 075000, China.
| | - Xiaobo Zhu
- Key Laboratory of Clinical Diagnostics, North University of Hebei, Zhangjiakou, 075000, China.
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Kuwabara S, Goggins E, Tanaka S. Neuroimmune Circuits Activated by Vagus Nerve Stimulation. Nephron Clin Pract 2021; 146:286-290. [PMID: 34515167 DOI: 10.1159/000518176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 06/15/2021] [Indexed: 11/19/2022] Open
Abstract
The interaction between the nervous system and the immune system has recently been well-recognized. Vagus nerve stimulation (VNS) presents potential as an anti-inflammatory therapy through activation of neuroimmune pathways. Detailed understanding of the neuroimmune pathways VNS evokes is critical in order to successfully use it in the clinic for the treatment of acute kidney injury, in which inflammation plays an important role. In this review, we describe recent findings regarding VNS-induced neuroimmune pathways responsible for anti-inflammation and tissue protection.
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Affiliation(s)
- Shuhei Kuwabara
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Eibhlin Goggins
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Shinji Tanaka
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, Virginia, USA
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8
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Wedn AM, El-Bassossy HM, Eid AH, El-Mas MM. Modulation of preeclampsia by the cholinergic anti-inflammatory pathway: Therapeutic perspectives. Biochem Pharmacol 2021; 192:114703. [PMID: 34324867 DOI: 10.1016/j.bcp.2021.114703] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 12/12/2022]
Abstract
The cholinergic anti-inflammatory pathway (CAP) is vital for the orchestration of the immune and inflammatory responses under normal and challenged conditions. Over the past two decades, peripheral and central circuits of CAP have been shown to be critically involved in dampening the inflammatory reaction in a wide array of inflammatory disorders. Additionally, emerging evidence supports a key role for CAP in the regulation of the female reproductive system during gestation as well as in the advent of serious pregnancy-related inflammatory insults such as preeclampsia (PE). Within this framework, the modulatory action of CAP encompasses the perinatal maternal and fetal adverse consequences that surface due to antenatal PE programming. Albeit, a considerable gap still exists in our knowledge of the precise cellular and molecular underpinnings of PE/CAP interaction, which hampered global efforts in safeguarding effective preventive or therapeutic measures against PE complications. Here, we summarize reports in the literature regarding the roles of peripheral and reflex cholinergic neuroinflammatory pathways of nicotinic acetylcholine receptors (nAChRs) in reprogramming PE complications in mothers and their progenies. The possible contributions of α7-nAChRs, cholinesterases, immune cells, adhesion molecules, angiogenesis, and endothelial dysfunction to the interaction have also been reviewed.
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Affiliation(s)
- Abdalla M Wedn
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Hany M El-Bassossy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Ali H Eid
- Department of Basic Medical Sciences, College of Medicine, QU Health, Qatar University, Doha, Qatar; Biomedical and Pharmaceutical Research Unit, QU Health, Qatar University, Doha, Qatar
| | - Mahmoud M El-Mas
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt; Department of Pharmacology and Toxicology, Faculty of Medicine, Kuwait University, Kuwait.
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Langreck C, Wauson E, Nerland D, Lamb B, Folkerts T, Winter L, Lu E, Tague S, McCarson KE, Ploski JE, Banasr M, Duman RS, Roland MM, Babich V, Di Sole F, Duric V. Hippocampal mitogen-activated protein kinase phosphatase-1 regulates behavioral and systemic effects of chronic corticosterone administration. Biochem Pharmacol 2021; 190:114617. [PMID: 34023293 DOI: 10.1016/j.bcp.2021.114617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 11/13/2022]
Abstract
Clinical reports indicate a bidirectional relationship between mental illness and chronic systemic diseases. However, brain mechanisms linking chronic stress and development of mood disorders to accompanying peripheral organ dysfunction are still not well characterized in animal models. In the current study, we investigated whether activation of hippocampal mitogen-activated protein kinase phosphatase-1 (MKP-1), a key factor in depression pathophysiology, also acts as a mediator of systemic effects of stress. First, we demonstrated that treatment with the glucocorticoid receptor (GR) agonist dexamethasone or acute restraint stress (ARS) significantly increased Mkp-1 mRNA levels within the rat hippocampus. Conversely, administration of the GR antagonist mifepristone 30 min before ARS produced a partial blockade of Mkp-1 upregulation, suggesting that stress activates MKP-1, at least in part, through upstream GR signaling. Chronic corticosterone (CORT) administration evoked comparable increases in hippocampal MKP-1 protein levels and produced a robust increase in behavioral emotionality. In addition to behavioral deficits, chronic CORT treatment also produced systemic pathophysiological effects. Elevated levels of renal inflammation protein markers (NGAL and IL18) were observed suggesting tissue damage and early kidney impairment. In a rescue experiment, the effects of CORT on development of depressive-like behaviors and increased NGAL and IL18 protein levels in the kidney were blocked by CRISPR-mediated knockdown of hippocampal Mkp-1 prior to CORT exposure. In sum, these findings further demonstrate that MKP-1 is necessary for development of enhanced behavioral emotionality, while also suggesting a role in stress mechanisms linking brain dysfunction and systemic illness such as kidney disease.
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Affiliation(s)
- Cory Langreck
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States; Department of Pharmacology, Columbia University, New York, NY 10032, United States
| | - Eric Wauson
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Dakota Nerland
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Brad Lamb
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Tyler Folkerts
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Lori Winter
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Eileen Lu
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Sarah Tague
- Smith Intellectual & Developmental Disabilities Research Center, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Kenneth E McCarson
- Smith Intellectual & Developmental Disabilities Research Center, University of Kansas Medical Center, Kansas City, KS 66160, United States; Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Jonathan E Ploski
- School of Behavioral and Brain Sciences and Department of Molecular and Cell Biology, The University of Texas at Dallas, Dallas, TX 75080, United States
| | - Mounira Banasr
- Campbell Family Mental Health Research Institute of CAMH, Toronto, Canada; Department of Psychiatry, Pharmacology and Toxicology, University of Toronto, Toronto, Canada
| | - Ronald S Duman
- Department of Psychiatry, Yale School of Medicine, New Haven, CT 06508, United States
| | - Miranda M Roland
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Victor Babich
- School of Liberal Arts and Sciences, Mercy College of Health Sciences, Des Moines, IA 50312, United States
| | - Francesca Di Sole
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States
| | - Vanja Duric
- Department of Physiology and Pharmacology, Des Moines University, Des Moines, IA 50312, United States.
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Wang Y, Yang Q, Shen S, Zhang L, Xiang Y, Weng X. Mst1 promotes mitochondrial dysfunction and apoptosis in oxidative stress-induced rheumatoid arthritis synoviocytes. Aging (Albany NY) 2020; 12:16211-16223. [PMID: 32692720 PMCID: PMC7485731 DOI: 10.18632/aging.103643] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/19/2020] [Indexed: 01/09/2023]
Abstract
In this study, we investigated the role of macrophage stimulating 1 (Mst1) and the AMPK-Sirt1 signaling pathway in the oxidative stress-induced mitochondrial dysfunction and apoptosis seen in rheumatoid arthritis-related fibroblast-like synoviocytes (RA-FLSs). Mst1 mRNA and protein expression was significantly higher in hydrogen peroxide (H2O2)-treated RA-FLSs than untreated controls. H2O2 treatment induced the mitochondrial apoptotic pathway by activating caspase3/9 and Bax in the RA-FLSs. Moreover, H2O2 treatment significantly reduced mitochondrial membrane potential and mitochondrial state-3 and state-4 respiration, but increased reactive oxygen species (ROS). Mst1 silencing significantly reduced oxidative stress-induced mitochondrial dysfunction and apoptosis in RA-FLSs. Sirt1 expression was significantly reduced in the H2O2-treated RA-FLSs, but was higher in the H2O2-treated Mst1-silenced RA-FLSs. Pretreatment with selisistat (Sirt1-specific inhibitor) or compound C (AMPK antagonist) significantly reduced the viability and mitochondrial function in H2O2-treated Mst1-silenced RA-FLSs by inhibiting Sirt1 function or Sirt1 expression, respectively. These findings demonstrate that oxidative stress-related upregulation and activation of Mst1 promotes mitochondrial dysfunction and apoptosis in RA-FLSs by inhibiting the AMPK-Sirt1 signaling pathway. This suggests the Mst1-AMPK-Sirt1 axis is a potential target for RA therapy.
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Affiliation(s)
- Yingjie Wang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, China
| | - Qi Yang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, China.,Department of Orthopedic Surgery, First Hospital of Harbin, Harbin 150010, China
| | - Songpo Shen
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, China.,Department of Orthopedic Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Linjie Zhang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, China
| | - Yongbo Xiang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, China
| | - Xisheng Weng
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, China
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