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Wang H, Zhang F, Xu TW, Xu Y, Tian Y, Wu Y, Xu J, Hu S, Xu G. DNMT1 involved in the analgesic effect of folic acid on gastric hypersensitivity through downregulating ASIC1 in adult offspring rats with prenatal maternal stress. CNS Neurosci Ther 2023; 29:1678-1689. [PMID: 36852448 PMCID: PMC10173708 DOI: 10.1111/cns.14131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 11/30/2022] [Accepted: 12/10/2022] [Indexed: 03/01/2023] Open
Abstract
AIMS Gastric hypersensitivity (GHS) is a characteristic pathogenesis of functional dyspepsia (FD). DNA methyltransferase 1 (DNMT1) and acid-sensing ion channel 1 (ASIC1) are associated with GHS induced by prenatal maternal stress (PMS). The aim of this study was to investigate the mechanism of DNMT1 mediating the analgesic effect of folic acid (FA) on PMS-induced GHS. METHODS GHS was quantified by electromyogram recordings. The expression of DNMT1, DNMT3a, DNMT3b, and ASIC1 were detected by western blot, RT-PCR, and double-immunofluorescence. Neuronal excitability and proton-elicited currents of dorsal root ganglion (DRG) neurons were determined by whole-cell patch clamp recordings. RESULTS The expression of DNMT1, but not DNMT3a or DNMT3b, was decreased in DRGs of PMS rats. FA alleviated PMS-induced GHS and hyperexcitability of DRG neurons. FA also increased DNMT1 and decreased ASIC1 expression and sensitivity. Intrathecal injection of DNMT1 inhibitor DC-517 attenuated the effect of FA on GHS alleviation and ASIC1 downregulation. Overexpression of DNMT1 with lentivirus not only rescued ASIC1 upregulation and hypersensitivity, but also alleviated GHS and hyperexcitability of DRG neurons induced by PMS. CONCLUSIONS These results indicate that increased DNMT1 contributes to the analgesic effect of FA on PMS-induced GHS by reducing ASIC1 expression and sensitivity.
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Affiliation(s)
- Hong‐Jun Wang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
- Jiangsu Key Laboratory of Anesthesiology & Jiangsu Key Laboratory of Anesthesia and Analgesia Application TechnologyXuzhou Medical UniversityXuzhouChina
| | - Fu‐Chao Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Timothy W. Xu
- Suzhou Academy of Xi'an Jiaotong UniversitySuzhouChina
| | - Yu‐Cheng Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Yuan‐Qing Tian
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Yan‐Yan Wu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Ji‐Tian Xu
- Department of Physiology and NeurobiologyCollege of Basic Medical Sciences, Zhengzhou UniversityZhengzhouChina
| | - Shufen Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Guang‐Yin Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
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Zhang H, Mu J, Du J, Feng Y, Xu W, Bai M, Zhang H. Alpha-lipoic acid could attenuate the effect of chemerin-induced diabetic nephropathy progression. Iran J Basic Med Sci 2021; 24:1107-1116. [PMID: 34804428 PMCID: PMC8591765 DOI: 10.22038/ijbms.2021.50792.11570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 07/05/2021] [Indexed: 12/21/2022]
Abstract
Objective(s): Chemerin is associated with insulin resistance, obesity, and metabolic syndrome. α-lipoic acid (α-LA) is a potent antioxidant involved in the reduction of diabetic symptoms. This study aimed to investigate the relationship between chemerin and P38 MAPK in the progression of diabetic nephropathy (DN) and examine the effects of α-LA on chemerin-treated human mesangial cells (HMCs). Materials and Methods: HMCs were transfected with a chemerin-overexpressing plasmid. HMCs were also treated with high-glucose, chemerin, α-LA, PDTC (pyrrolidine dithiocarbamate ammonium, NF-κB p65 inhibitor), and/or SB203580 (P38 MAPK inhibitor). Cell proliferation was tested using the Cell Counting Kit-8 assay. Collagen type IV and laminin were tested by ELISA. Chemerin expression was detected by qRT-PCR. The chemerin receptor was detected by immunohistochemistry. Interleukin-6 (IL-6), tumor necrosis factor-a (TNF-α), nuclear factor-κBp-p65 (NF-κB p-p65), transforming growth factor-β (TGF-β), and p-P38 mitogen-activated protein kinase (p-P38 MAPK) were evaluated by western blot. Results: High-glucose culture increased the expression of the chemerin receptor. α-LA inhibited HMC proliferation. Chemerin overexpression increased collagen type IV and laminin expression. P38 MAPK signaling was activated by chemerin, resulting in up-regulation of IL-6, TNF-α, NF-κB p-p65, and TGF-β. SB203580, PDTC, and α-LA reversed the effects of chemerin, reducing IL-6, TNF-α, NF-κB p-p65, and TGF-β expression. Conclusion: Chemerin might be involved in the occurrence and development of DN. α-LA might prevent the effects of chemerin on the progression of DN, possibly via the P38 MAPK pathway.
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Affiliation(s)
- Hong Zhang
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jiawei Mu
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jinqiu Du
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Ying Feng
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wenhui Xu
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Mengmeng Bai
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Huijuan Zhang
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
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Joksimovic SL, Lamborn N, Jevtovic-Todorovic V, Todorovic SM. Alpha lipoic acid attenuates evoked and spontaneous pain following surgical skin incision in rats. Channels (Austin) 2021; 15:398-407. [PMID: 33843451 PMCID: PMC8043189 DOI: 10.1080/19336950.2021.1907058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Our previous studies have implicated CaV3.2 isoform of T-type Ca2+ channels (T-channels) in the development of postsurgical pain. We have also previously established that different T-channel antagonists can alleviate in vivo postsurgical pain. Here we investigated the analgesic potential of another T-channel blocker and endogenous antioxidant molecule, α-lipoic acid (ALA), in a postsurgical pain model in rats. Our in vivo results suggest that single and repetitive intraperitoneal injections of ALA after surgery or preemptively, significantly reduced evoked mechanical hyperalgesia following surgical paw incision. Furthermore, repeated preemptive systemic injections of ALA effectively alleviated spontaneous postsurgical pain as determined by dynamic weight-bearing testing. We expect that our preclinical study may lead to further investigation of analgesic properties and mechanisms of analgesic action of ALA in patients undergoing surgery.
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Affiliation(s)
- Sonja Lj Joksimovic
- Department of Anesthesiology, University of Colorado Denver Anschutz Medical Campus, Aurora, CO, USA
| | - Nathan Lamborn
- Department of Anesthesiology, University of Colorado Denver Anschutz Medical Campus, Aurora, CO, USA
| | - Vesna Jevtovic-Todorovic
- Department of Anesthesiology, University of Colorado Denver Anschutz Medical Campus, Aurora, CO, USA
| | - Slobodan M Todorovic
- Department of Anesthesiology, University of Colorado Denver Anschutz Medical Campus, Aurora, CO, USA.,Neuroscience Graduate Program, Graduate Program in Pharmacology, and Graduate Program in Biomedical Sciences, University of Colorado Denver, Anschutz Medical Campus and Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
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Zhang BY, Zhang YL, Sun Q, Zhang PA, Wang XX, Xu GY, Hu J, Zhang HH. Alpha-lipoic acid downregulates TRPV1 receptor via NF-κB and attenuates neuropathic pain in rats with diabetes. CNS Neurosci Ther 2020; 26:762-772. [PMID: 32175676 PMCID: PMC7298987 DOI: 10.1111/cns.13303] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 02/17/2020] [Accepted: 03/01/2020] [Indexed: 12/14/2022] Open
Abstract
Aims Painful diabetic neuropathy (PDN) is a refractory complication of diabetes. The study aimed to investigate the role of α‐lipoic acid (ALA) on the regulation of transient receptor potential vanilloid‐1 (TRPV1) in dorsal root ganglion (DRG) neurons of rats with diabetes. Methods Whole‐cell patch‐clamp recordings were employed to measure neuronal excitability in DiI‐labeled DRG neurons of control and streptozotocin (STZ)‐induced diabetic rats. Western blotting and immunofluorescence assays were used to determine the expression and location of NF‐κBp65 and TRPV1. Results STZ‐induced hindpaw pain hypersensitivity and neuronal excitability in L4‐6 DRG neurons were attenuated by intraperitoneal injection with ALA once a day lasted for one week. TRPV1 expression was enhanced in L4‐6 DRGs of diabetic rats compared with age‐matched control rats, which was also suppressed by ALA treatment. In addition, TRPV1 and p65 colocated in the same DRG neurons. The expression of p65 was upregulated in L4‐6 DRGs of diabetic rats. Inhibition of p65 signaling using recombinant lentiviral vectors designated as LV‐NF‐κBp65 siRNA remarkably suppressed TRPV1 expression. Finally, p65 expression was downregulated by ALA treatment. Conclusion Our findings demonstrated that ALA may alleviate neuropathic pain in diabetes by regulating TRPV1 expression via affecting NF‐κB.
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Affiliation(s)
- Bing-Yu Zhang
- Department of Endocrinology, The Second Affiliated Hospital, Soochow University, Suzhou, China
| | - Yi-Lian Zhang
- Department of Endocrinology, The Second Affiliated Hospital, Soochow University, Suzhou, China
| | - Qian Sun
- Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Ping-An Zhang
- Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Xi-Xi Wang
- Department of Endocrinology, The Second Affiliated Hospital, Soochow University, Suzhou, China
| | - Guang-Yin Xu
- Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Ji Hu
- Department of Endocrinology, The Second Affiliated Hospital, Soochow University, Suzhou, China
| | - Hong-Hong Zhang
- Department of Endocrinology, The Second Affiliated Hospital, Soochow University, Suzhou, China
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Sun Q, Zhang BY, Zhang PA, Hu J, Zhang HH, Xu GY. Downregulation of glucose-6-phosphate dehydrogenase contributes to diabetic neuropathic pain through upregulation of toll-like receptor 4 in rats. Mol Pain 2019; 15:1744806919838659. [PMID: 30838902 PMCID: PMC6487759 DOI: 10.1177/1744806919838659] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Background and aim Diabetic neuropathic pain is a refractory and disabling complication of diabetes mellitus. The pathogenesis of the diabetic neuropathic pain is still unclear, and treatment is insufficient. The aim of this study is to investigate the roles of glucose-6-phosphate dehydrogenase (G6PD) and toll-like receptor 4 (TLR4) in neuropathic pain in rats with diabetes. Methods Type 1 diabetes model was induced by intraperitoneal injection of streptozotocin (STZ, 75 mg/kg) in adult female Sprague-Dawley rats. Paw withdrawal threshold and paw withdrawal latency of rats were measured by von Frey filaments and thermal radiation, respectively. The expressions of G6PD and TLR4 in L4-L6 dorsal root ganglions (DRGs) were measured by western blotting and quantitative real-time polymerase chain reaction analysis. Fluorescent immunohistochemistry was employed to detect expressions of G6PD and TLR4 and co-location of G6PD with TLR4. Results The mRNA and protein expression levels of G6PD in DRGs were significantly decreased in diabetic rats when compared with age-matched control rats. Upregulation of G6PD by intrathecal injection of G6PD overexpression adenovirus markedly attenuated hindpaw pain hypersensitivity of diabetic rats. The mRNA and protein expression levels of TLR4 in DRGs of diabetic rats were significantly increased when compared with control rats. Intrathecal injection of TLR4-selective inhibitor CLI-095 attenuated diabetic pain in dose- and time-dependent manners. Furthermore, G6PD and TLR4 were co-localized in DRG neurons. Intrathecal injection of G6PD overexpression adenovirus greatly reduced TLR4 expression, while intrathecal injection of CLI-095 had no significant effect on G6PD expression in diabetic rats. Conclusions Our results suggest that decrease in G6PD expression was involved in diabetic peripheral neuropathic pain, which was most likely through upregulation of TLR4 expression in the DRGs of rats.
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Affiliation(s)
- Qian Sun
- 1 Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, P. R. China.,2 Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
| | - Bing-Yu Zhang
- 1 Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, P. R. China
| | - Ping-An Zhang
- 2 Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
| | - Ji Hu
- 1 Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, P. R. China
| | - Hong-Hong Zhang
- 1 Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, P. R. China
| | - Guang-Yin Xu
- 2 Center for Translational Pain Medicine, Institute of Neuroscience, Soochow University, Suzhou, P. R. China
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Coates MD, Vrana KE, Ruiz-Velasco V. The influence of voltage-gated sodium channels on human gastrointestinal nociception. Neurogastroenterol Motil 2019; 31:e13460. [PMID: 30216585 DOI: 10.1111/nmo.13460] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 08/01/2018] [Accepted: 08/07/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND Abdominal pain is a frequent and persistent problem in the most common gastrointestinal disorders, including irritable bowel syndrome and inflammatory bowel disease. Pain adversely impacts quality of life, incurs significant healthcare expenditures, and remains a challenging issue to manage with few safe therapeutic options currently available. It is imperative that new methods are developed for identifying and treating this symptom. A variety of peripherally active neuroendocrine signaling elements have the capability to influence gastrointestinal pain perception. A large and growing body of evidence suggests that voltage-gated sodium channels (VGSCs) play a critical role in the development and modulation of nociceptive signaling associated with the gut. Several VGSC isoforms demonstrate significant promise as potential targets for improved diagnosis and treatment of gut-based disorders associated with hyper- and hyposensitivity to abdominal pain. PURPOSE In this article, we critically review key investigations that have evaluated the potential role that VGSCs play in visceral nociception and discuss recent advances related to this topic. Specifically, we discuss the following: (a) what is known about the structure and basic function of VGSCs, (b) the role that each VGSC plays in gut nociception, particularly as it relates to human physiology, and (c) potential diagnostic and therapeutic uses of VGSCs to manage disorders associated with chronic abdominal pain.
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Affiliation(s)
- Matthew D Coates
- Division of Gastroenterology & Hepatology, Department of Medicine, Penn State University College of Medicine, Hershey, Pennsylvania
| | - Kent E Vrana
- Department of Pharmacology, Penn State University College of Medicine, Hershey, Pennsylvania
| | - Victor Ruiz-Velasco
- Department of Anesthesiology and Perioperative Medicine, Penn State University College of Medicine, Hershey, Pennsylvania
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Cruz-Álvarez LEDL, Zúñiga-Romero Á, Huerta-Cruz JC, Flores-Murrieta FJ, Reyes-García JG, Araiza-Saldaña CI, Rocha-González HI. Antiallodynic interaction and motor performance of the pregabalin/thioctic acid and pregabalin/α-tocopherol combinations in neonatal streptozotocin-induced diabetic rats. Drug Dev Res 2018; 79:362-369. [DOI: 10.1002/ddr.21473] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/19/2018] [Accepted: 08/25/2018] [Indexed: 12/12/2022]
Affiliation(s)
| | - Ángel Zúñiga-Romero
- Sección de Estudios de Posgrado e Investigación; Escuela Superior de Medicina, Instituto Politécnico Nacional; Ciudad de México Mexico
| | - Juan Carlos Huerta-Cruz
- Sección de Estudios de Posgrado e Investigación; Escuela Superior de Medicina, Instituto Politécnico Nacional; Ciudad de México Mexico
| | - Francisco Javier Flores-Murrieta
- Sección de Estudios de Posgrado e Investigación; Escuela Superior de Medicina, Instituto Politécnico Nacional; Ciudad de México Mexico
- Unidad de Investigación en Farmacología; Instituto Nacional de Enfermedades Respiratorias, Ismael Cosio Villegas, Secretaría de Salud; Ciudad de México Mexico
| | - Juan Gerardo Reyes-García
- Sección de Estudios de Posgrado e Investigación; Escuela Superior de Medicina, Instituto Politécnico Nacional; Ciudad de México Mexico
| | | | - Héctor Isaac Rocha-González
- Sección de Estudios de Posgrado e Investigación; Escuela Superior de Medicina, Instituto Politécnico Nacional; Ciudad de México Mexico
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