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Parthasarathy G. Fibroblast growth factor receptor inhibitors mitigate the neuropathogenicity of Borrelia burgdorferi or its remnants ex vivo. Front Immunol 2024; 15:1327416. [PMID: 38638441 PMCID: PMC11024320 DOI: 10.3389/fimmu.2024.1327416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 03/19/2024] [Indexed: 04/20/2024] Open
Abstract
In previous studies, we showed that fibroblast growth factor receptors (FGFRs) contribute to inflammatory mediator output from primary rhesus microglia in response to live Borrelia burgdorferi. We also demonstrated that non-viable B. burgdorferi can be as pathogenic as live bacteria, if not more so, in both CNS and PNS tissues. In this study we assessed the effect of live and non-viable B. burgdorferi in inducing FGFR expression from rhesus frontal cortex (FC) and dorsal root ganglion (DRG) tissue explants as well as their neuronal/astrocyte localization. Specific FGFR inhibitors were also tested for their ability to attenuate inflammatory output and apoptosis in response to either live or non-viable organisms. Results show that in the FC, FGFR2 was the most abundantly expressed receptor followed by FGFR3 and FGFR1. Non-viable B. burgdorferi significantly upregulated FGFR3 more often than live bacteria, while the latter had a similar effect on FGFR1, although both treatments did affect the expressions of both receptors. FGFR2 was the least modulated in the FC tissues by the two treatments. FGFR1 expression was more prevalent in astrocytes while FGFR2 and FGFR3 showed higher expression in neurons. In the DRG, all three receptor expressions were also seen, but could not be distinguished from medium controls by immunofluorescence. Inhibition of FGFR1 by PD166866 downregulated both inflammation and apoptosis in both FC and DRG in response to either treatment in all the tissues tested. Inhibition of FGFR1-3 by AZD4547 similarly downregulated both inflammation and apoptosis in both FC and DRG in response to live bacteria, while with sonicated remnants, this effect was seen in one of the two FC tissues and 2 of 3 DRG tissues tested. CCL2 and IL-6 were the most downregulated mediators in the FC, while in the DRG it was CXCL8 and IL-6 in response to FGFR inhibition. Downregulation of at least two of these three mediators was observed to downregulate apoptosis levels in general. We show here that FGFR inhibition can be an effective anti-inflammatory treatment in antibiotic refractive neurological Lyme. Alternatively, two biologics may be needed to effectively curb neuroinflammation and pathology in the CNS and PNS.
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Affiliation(s)
- Geetha Parthasarathy
- Division of Immunology, Tulane National Primate Research Center, Tulane University, Covington, LA, United States
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2
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Foroni MZ, Cendoroglo MS, Costa AG, Marin-Mio RV, do Prado Moreira PF, Maeda SS, Bilezikian JP, Lazaretti-Castro M. FGF23 levels as a marker of physical performance and falls in community-dwelling very old individuals. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2022; 66:2359-3997000000488. [PMID: 35612845 PMCID: PMC9832858 DOI: 10.20945/2359-3997000000488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 03/07/2022] [Indexed: 11/23/2022]
Abstract
Objective The fibroblast growth factor 23 (FGF23) has been related to biological aging, but data in elderly individuals are scant. We determined the profile of serum FGF23 levels in a population of very-old individuals and studied their correlations with parameters of bone metabolism and health markers, as functional performance. Methods This cross-sectional study was performed on 182 community dwellers aged ≥ 80 years. Serum levels of FGF23, PTH, calcium, albumin, phosphorus, creatinine, bone markers, and bone mineral density data were analyzed. Physical performance was evaluated with the stationary march (Step), Flamingo, and functional reach tests, along with questionnaires to assess falls and fractures in the previous year, energy expenditure (MET), and the Charlson index (CI). Physical activity was evaluated with the International Physical Activity Questionnaire (IPAQ). Results Most participants (75%) had FGF23 levels between 30-120 RU/mL (range: 6.0-3,170.0 RU/mL). FGF23 levels correlated with estimated glomerular filtration rate (eGFR; r = -0.335; p = 0.001) and PTH (r = 0.318; p < 0.0001). Individuals with FGF23 in the highest tertile had more falls in the previous year (p = 0.032), worse performance in the Flamingo (p = 0.009) and Step (p < 0.001) tests, worse CI (p = 0.009) and a trend toward sedentary lifestyle (p = 0.056). On multiple regression, FGF23 tertiles remained significant, independently of eGFR, for falls in the previous year, performance in the Flamingo and stationary march tests, lean mass index, and IPAQ classification. Conclusion In a population of very elderly individuals, FGF23 levels were inversely associated with neuromuscular and functional performances. Higher concentrations were related to more falls, lower muscle strength and aerobic capacity, and poorer balance, regardless of renal function, suggesting a potentially deleterious role of high FGF23 concentrations in musculoskeletal health.
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Affiliation(s)
- Mariana Zuccolotto Foroni
- Divisão de Endocrinologia, Escola Paulista de Medicina - Universidade Federal de São Paulo (Unifesp), São Paulo, SP, Brasil,
| | - Maysa Seabra Cendoroglo
- Divisão de Geriatria, Escola Paulista de Medicina - Universidade Federal de São Paulo (Unifesp), São Paulo, SP, Brasil
| | - Aline Granja Costa
- Divisão de Endocrinologia, Escola Paulista de Medicina - Universidade Federal de São Paulo (Unifesp), São Paulo, SP, Brasil
| | - Rosangela Villa Marin-Mio
- Divisão de Endocrinologia, Escola Paulista de Medicina - Universidade Federal de São Paulo (Unifesp), São Paulo, SP, Brasil
| | | | - Sergio Setsuo Maeda
- Divisão de Endocrinologia, Escola Paulista de Medicina - Universidade Federal de São Paulo (Unifesp), São Paulo, SP, Brasil
| | - John P Bilezikian
- Department of Medicine, Division of Endocrinology, College of Physicians and Surgeons, Columbia University, New York, New York, USA
| | - Marise Lazaretti-Castro
- Divisão de Endocrinologia, Escola Paulista de Medicina - Universidade Federal de São Paulo (Unifesp), São Paulo, SP, Brasil
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Forouzanfar F, Sadeghnia HR. Fibroblast Growth Factors as Tools in the Management of Neuropathic Pain Disorders. Curr Drug Targets 2021; 21:1034-1043. [PMID: 32324511 DOI: 10.2174/1389450121666200423084205] [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] [Received: 09/17/2019] [Revised: 01/22/2020] [Accepted: 01/24/2020] [Indexed: 12/19/2022]
Abstract
Neuropathic pain is caused by a damage to or dysfunction of the somatosensory nervous system. The main mechanisms underlying neuropathic pain include ectopic activity in nociceptive nerves, peripheral and central sensitization, impaired inhibitory modulation, and microglial activation. Fibroblast growth factors (FGFs) make up a large family of growth factors that mediate neural development, metabolism, and function through three main key signaling pathways, including RAS/MAP kinase pathway, PI3 kinase/Akt pathway, and PLCγ. An association between the members of the FGF system and the improvement of neuropathic pain has become evident, recently. These signaling molecules may be expected to provide new drug targets for the treatment of neuropathic pain. To the best of our knowledge, it is the first study that reviews the relationship between some members of the FGF system and neuropathic pain.
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Affiliation(s)
- Fatemeh Forouzanfar
- Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid R Sadeghnia
- Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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Klimaschewski L, Claus P. Fibroblast Growth Factor Signalling in the Diseased Nervous System. Mol Neurobiol 2021; 58:3884-3902. [PMID: 33860438 PMCID: PMC8280051 DOI: 10.1007/s12035-021-02367-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/19/2021] [Indexed: 12/12/2022]
Abstract
Fibroblast growth factors (FGFs) act as key signalling molecules in brain development, maintenance, and repair. They influence the intricate relationship between myelinating cells and axons as well as the association of astrocytic and microglial processes with neuronal perikarya and synapses. Advances in molecular genetics and imaging techniques have allowed novel insights into FGF signalling in recent years. Conditional mouse mutants have revealed the functional significance of neuronal and glial FGF receptors, not only in tissue protection, axon regeneration, and glial proliferation but also in instant behavioural changes. This review provides a summary of recent findings regarding the role of FGFs and their receptors in the nervous system and in the pathogenesis of major neurological and psychiatric disorders.
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Affiliation(s)
- Lars Klimaschewski
- Department of Anatomy, Histology and Embryology, Institute of Neuroanatomy, Medical University of Innsbruck, Innsbruck, Austria.
| | - Peter Claus
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, Hannover, Germany
- Center for Systems Neuroscience, Hannover, Germany
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Wangzhou A, Paige C, Neerukonda SV, Naik DK, Kume M, David ET, Dussor G, Ray PR, Price TJ. A ligand-receptor interactome platform for discovery of pain mechanisms and therapeutic targets. Sci Signal 2021; 14:14/674/eabe1648. [PMID: 33727337 DOI: 10.1126/scisignal.abe1648] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In the peripheral nervous system, ligand-receptor interactions between cells and neurons shape sensory experience, including pain. We set out to identify the potential interactions between sensory neurons and peripheral cell types implicated in disease-associated pain. Using mouse and human RNA sequencing datasets and computational analysis, we created interactome maps between dorsal root ganglion (DRG) sensory neurons and an array of normal cell types, as well as colitis-associated glial cells, rheumatoid arthritis-associated synovial macrophages, and pancreatic tumor tissue. These maps revealed a common correlation between the abundance of heparin-binding EGF-like growth factor (HBEGF) in peripheral cells with that of its receptor EGFR (a member of the ErbB family of receptors) in DRG neurons. Subsequently, we confirmed that increased abundance of HBEGF enhanced nociception in mice, likely acting on DRG neurons through ErbB family receptors. Collectively, these interactomes highlight ligand-receptor interactions that may lead to treatments for disease-associated pain and, furthermore, reflect the complexity of cell-to-neuron signaling in chronic pain states.
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Affiliation(s)
- Andi Wangzhou
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA
| | - Candler Paige
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA
| | - Sanjay V Neerukonda
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA
| | - Dhananjay K Naik
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA
| | - Moeno Kume
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA
| | - Eric T David
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA
| | - Gregory Dussor
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA
| | - Pradipta R Ray
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA.
| | - Theodore J Price
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, 800 W Campbell Rd., Richardson, TX 75080, USA.
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Jovanovich A, Ginsberg C, You Z, Katz R, Ambrosius WT, Berlowitz D, Cheung AK, Cho M, Lee AK, Punzi H, Rehman S, Roumie C, Supiano MA, Wright CB, Shlipak M, Ix JH, Chonchol M. FGF23, Frailty, and Falls in SPRINT. J Am Geriatr Soc 2020; 69:467-473. [PMID: 33289072 DOI: 10.1111/jgs.16895] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 09/29/2020] [Accepted: 09/30/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND/OBJECTIVES Chronic kidney disease (CKD) is associated with frailty. Fibroblast growth factor 23 (FGF23) is elevated in CKD and associated with frailty among non-CKD older adults and individuals with human immunodeficiency virus. Whether FGF23 is associated with frailty and falls in CKD is unknown. DESIGN Cross-sectional and longitudinal observational study. SETTING Systolic Blood Pressure Intervention Trial (SPRINT), a randomized trial evaluating standard (systolic blood pressure [SBP] <140 mm Hg) versus intensive (SBP <120 mm Hg) blood pressure lowering on cardiovascular and cognitive outcomes among older adults without diabetes mellitus. PARTICIPANTS A total of 2,376 participants with CKD (estimated glomerular filtration rate [eGFR] <60 mL/min/1.73 m2 ). MEASUREMENTS The exposure variable was intact FGF23. We used multinomial logistic regression to determine the cross-sectional association of intact FGF23 with frailty and Cox proportional hazards analysis to determine the longitudinal association with incident falls. Models were adjusted for demographics, comorbidities, randomization group, antihypertensives, eGFR, mineral metabolism markers, and frailty. RESULTS After adjustment, the odds ratio for prevalent frailty versus non-frailty per twofold higher FGF23 was 1.34 (95% confidence interval [CI] = 1.01-1.77). FGF23 levels in the highest quartile versus the lowest quartile demonstrated more than a twofold increased fall risk (hazard ratio [HR] = 2.32; 95% CI = 1.26-4.26), and the HR per twofold higher FGF23 was 1.99 (95% CI = 1.48-2.68). CONCLUSION Among SPRINT participants with CKD, FGF23 was associated with prevalent frailty and falls.
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Affiliation(s)
- Anna Jovanovich
- VA Eastern Colorado Healthcare System, Aurora, Colorado.,University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | | | - Zhiying You
- University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Ronit Katz
- University of Washington, Seattle, Washington
| | | | | | - Alfred K Cheung
- University of Utah, Salt Lake City, Utah.,Salt Lake City VA Medical Center, Salt Lake City, Utah
| | - Monique Cho
- Salt Lake City VA Medical Center, Salt Lake City, Utah
| | - Alexandra K Lee
- University of California, San Francisco, San Francisco, California
| | | | - Shakaib Rehman
- Phoenix VA Healthcare System, Phoenix, Arizona.,University of Arizona College of Medicine-Phoenix, Phoenix, Arizona
| | | | - Mark A Supiano
- University of Utah, Salt Lake City, Utah.,Salt Lake City VA Medical Center, Salt Lake City, Utah
| | - Clinton B Wright
- National Institute of Neurological Disorders and Stroke, Bethesda, Maryland
| | - Michael Shlipak
- University of California, San Francisco, San Francisco, California
| | - Joachim H Ix
- University of California San Diego, San Diego, California.,Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Michel Chonchol
- University of Colorado Anschutz Medical Campus, Aurora, Colorado
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7
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Mai L, Zhu X, Huang F, He H, Fan W. p38 mitogen-activated protein kinase and pain. Life Sci 2020; 256:117885. [PMID: 32485175 DOI: 10.1016/j.lfs.2020.117885] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 05/23/2020] [Accepted: 05/28/2020] [Indexed: 12/18/2022]
Abstract
Inflammatory and neuropathic pain is initiated by tissue inflammation and nerve injury, respectively. Both are characterized by increased activity in the peripheral and central nervous system, where multiple inflammatory cytokines and other active molecules activate different signaling pathways that involve in the development and/or maintenance of pain. P38 mitogen-activated protein kinase (MAPK) is one member of the MAPK family, which is activated in neurons and glia and contributes importantly to inflammatory and neuropathic pain. The aim of this review is to summarize the latest advances made about the implication of p38 MAPK signaling cascade in pain. It can deepen our understanding of the molecular mechanisms of pain and may help to offer new targets for pain treatment.
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Affiliation(s)
- Lijia Mai
- Department of Anesthesiology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou 510080, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Xiao Zhu
- The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang 524023, China
| | - Fang Huang
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Hongwen He
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Wenguo Fan
- Department of Anesthesiology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou 510080, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China.
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8
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Zhang M, Jin F, Zhu Y, Qi F. Peripheral FGFR1 Regulates Myofascial Pain in Rats via the PI3K/AKT Pathway. Neuroscience 2020; 436:1-10. [PMID: 32278061 DOI: 10.1016/j.neuroscience.2020.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 12/26/2022]
Abstract
Myofascial pain syndrome (MPS) is a type of skeletal pain identified by myofascial trigger points (MTrPs). The formation of MTrPs is linked to muscle damage. The fibroblast growth factor receptor (FGFR1) has been found to cause pain sensitivity while repairing tissue damage. The aim of the current study was to explore the mechanism of FGFR1 in MTrPs. We used a RayBio human phosphorylation array kit to measure p-FGFR1 levels in human control subjects and patients with MTrPs. P-FGFR1 was upregulated in the patients with MTrPs. Then a rat model of MPS was established by a blunt strike on the left gastrocnemius muscles (GM) and eccentric-exercise for 8 weeks with 4 weeks of recovery. After establishing the MPS model, the morphology of the GM changed, and the differently augmented sizes of round fibers (contracture knots) in the transverse section and fusiform shapes in the longitudinal section were clearly seen in the rats with myofascial pain. The expression of p-FGFR1 was upregulated on the peripheral nerves and dorsal root ganglion neurons in the MTrPs group. The spinal Fos protein expression was increased in the MTrPs group. Additionally, the mechanical pain threshold was reduced, and the expression of FGF2, p-FGFR1, PI3K-p110γ, and p-AKT increased in the MTrPs group. PD173074 increased the mechanical pain threshold of the MTrPs group, and inhibited the expression of p-FGFR1, PI3K-p110γ, and p-AKT. Moreover, LY294002 increased the mechanical pain threshold of the MTrPs group. These findings suggest that FGFR1 may regulate myofascial pain in rats through the PI3K/AKT pathway.
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Affiliation(s)
- Mingyang Zhang
- Department of Anesthesiology and Pain Clinic, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, Ji'nan, Shandong 250012, China; Department of Anesthesiology, Tengzhou Central People's Hospital, 181 Xingtan Road, Tengzhou, Shandong 277500, China
| | - Feihong Jin
- Department of Anesthesiology and Pain Clinic, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, Ji'nan, Shandong 250012, China
| | - Yuchang Zhu
- Department of Anesthesiology, Tai'an City Central Hospital, 29 Longtan Road, Tai'an, Shandong 271000, China
| | - Feng Qi
- Department of Anesthesiology and Pain Clinic, Qilu Hospital of Shandong University, 107 Wenhuaxi Road, Ji'nan, Shandong 250012, China.
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Okubo M, Yamanaka H, Kobayashi K, Noguchi K. Differential expression of mGluRs in rat spinal dorsal horns and their modulatory effects on nocifensive behaviors. Mol Pain 2019; 15:1744806919875026. [PMID: 31432760 PMCID: PMC6751533 DOI: 10.1177/1744806919875026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Glutamate is a neurotransmitter present in most excitatory synapses in the nervous system. It also plays a key role in the spinal cord’s physiological excitatory circuit and is involved in pathological neurotransmissions such as those observed in inflammatory and neuropathic pain conditions. The actions of glutamate are mediated by different types of ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (mGluRs). Although expressions of iGluRs are well studied, those of mGluRs are not fully elucidated in the spinal cord. In this study, we examined the expressions of mGluRs (mGluR1-8) and investigated which mGluR subtypes can modulate pain transmission in the dorsal horn of the spinal cord using an inflammatory pain model. Reverse transcription-polymerase chain reaction revealed that mGluR mRNAs, except for mGluR2 and 6, were detected in the spinal cord. Double labeling analysis, in situ hybridization histochemistry with immunohistochemistry, was used to examine the distribution of each mGluR in neurons or glial cells in the lamina I–II of the spinal dorsal horn. mGluR1, 5, and 7 were generally, and 4 and 8 were frequently, expressed in neurons. mGluR3 was expressed not only in neurons but also in oligodendrocytes. We next examined the distribution of mGluR4 and 8 were expressed in excitatory or inhibitory neurons. Both mGluR4 and 8 were preferentially expressed in inhibitory neurons rather than in excitatory neurons. Furthermore, intrathecal delivery of CPPG((RS)-α-cyclopropyl-4-phosphonophenylglycine), an antagonist for mGluR 4 and 8, attenuated nocifensive behaviors and the increase in fos-positive-excitatory neurons of the dorsal horn induced by intraplantar injection of formalin. These findings suggest that mGluR4 and 8, which are preferentially expressed in inhibitory neurons, may play roles in the modulation of pain transmission in the spinal dorsal horn.
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Affiliation(s)
- Masamichi Okubo
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
| | - Hiroki Yamanaka
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
| | - Kimiko Kobayashi
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
| | - Koichi Noguchi
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Hyogo, Japan
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10
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Si W, Zhang Y, Chen K, Hu D, Qian Z, Gong S, Li H, Hao Y, Tao J. Fibroblast growth factor type 1 receptor stimulation of T-type Ca2+ channels in sensory neurons requires the phosphatidylinositol 3-kinase and protein kinase A pathways, independently of Akt. Cell Signal 2018; 45:93-101. [DOI: 10.1016/j.cellsig.2018.01.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/25/2018] [Accepted: 01/25/2018] [Indexed: 02/08/2023]
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Ruan JP, Mao QH, Lu WG, Cai XT, Chen J, Li Q, Fu Q, Yan HJ, Cao JL, Cao P. Inhibition of spinal MAPKs by scorpion venom peptide BmK AGAP produces a sensory-specific analgesic effect. Mol Pain 2018; 14:1744806918761238. [PMID: 29424271 PMCID: PMC5844526 DOI: 10.1177/1744806918761238] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background Several studies have shown that scorpion venom peptide BmK AGAP has an analgesic activity. Our previous study also demonstrated that intraplantar injection of BmK AGAP ameliorates formalin-induced spontaneous nociceptive behavior. However, the effect of intrathecal injection of BmK AGAP on nociceptive processing is poorly understood. Methods We investigated the effects of intrathecal injection of BmK AGAP on spinal nociceptive processing induced by chronic constrictive injury or formalin. Thermal hyperalgesia and mechanical allodynia were measured using radiant heat and the von Frey filaments test. Formalin-induced spontaneous nociceptive behavior was also investigated. C-Fos expression was assessed by immunohistochemistry. Phosphorylated mitogen-activated protein kinase (p-MAPK) expression was monitored by Western blot assay. Results Intrathecal injection of BmK AGAP reduced chronic constrictive injury-induced neuropathic pain behavior and pain from formalin-induced inflammation, accompanied by decreased expression of spinal p-MAPKs and c-Fos protein. The results of combining low doses of different MAPK inhibitor (U0126, SP600125, or SB203580; 0.1 µg for each inhibitor) with a low dose of BmK AGAP (0.2 µg) suggested that BmK AGAP could potentiate the effects of MAPK inhibitors on inflammation-associated pain. Conclusion Our results demonstrate that intrathecal injection of BmK AGAP produces a sensory-specific analgesic effect via a p-MAPK-dependent mechanism.
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Affiliation(s)
- Jia-Ping Ruan
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Qing-Hong Mao
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Wu-Guang Lu
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Xue-Ting Cai
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Jiao Chen
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Qing- Li
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Qun- Fu
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Huai-Jiang Yan
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
| | - Jun-Li Cao
- 3 Jiangsu Key Laboratory of Anesthesiology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu, China
| | - Peng Cao
- 1 Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, 66478 Nanjing University of Chinese Medicine , Nanjing, Jiangsu, China.,2 375808 Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing, Jiangsu, China
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12
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Liu H, Wu QF, Li JY, Liu XJ, Li KC, Zhong YQ, Wu D, Wang Q, Lu YJ, Bao L, Zhang X. Fibroblast growth factor 7 is a nociceptive modulator secreted via large dense-core vesicles. J Mol Cell Biol 2015; 7:466-75. [PMID: 25782913 DOI: 10.1093/jmcb/mjv019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 02/02/2015] [Indexed: 11/13/2022] Open
Abstract
Fibroblast growth factor (FGF) 7, a member of FGF family, is initially found to be secreted from mesenchymal cells to repair epithelial tissues. However, its functions in the nervous system are largely unknown. The present study showed that FGF7 was a neuromodulator localized in the large dense-core vesicles (LDCVs) in nociceptive neurons. FGF7 was mainly expressed in small-diameter neurons of the dorsal root ganglion and could be transported to the dorsal spinal cord. Interestingly, FGF7 was mostly stored in LDCVs that did not contain neuropeptide substance P. Electrophysiological recordings in the spinal cord slice showed that buffer-applied FGF7 increased the amplitude of excitatory post-synaptic current evoked by stimulating the sensory afferent fibers. Behavior tests showed that intrathecally applied FGF7 potentiated the formalin-induced acute nociceptive response. Moreover, both acute and inflammatory nociceptive responses were significantly reduced in Fgf7-deficient mice. These results suggest that FGF7 exerts an excitatory modulation of nociceptive afferent transmission.
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Affiliation(s)
- Hui Liu
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Qing-Feng Wu
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Jia-Yin Li
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xing-Jun Liu
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Kai-Cheng Li
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yan-Qing Zhong
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Dan Wu
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Qiong Wang
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yin-Jing Lu
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Lan Bao
- State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Xu Zhang
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
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13
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Increased expression of fibroblast growth factor receptor 1 in endometriosis and its correlation with endometriosis-related dysmenorrhea and recurrence. Eur J Obstet Gynecol Reprod Biol 2014; 184:117-24. [PMID: 25500535 DOI: 10.1016/j.ejogrb.2014.11.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 10/23/2014] [Accepted: 11/11/2014] [Indexed: 02/05/2023]
Abstract
OBJECTIVE(S) This study aims to identify a critical molecule that potentially participates in endometriosis pathogenesis and characterize its correlation with dysmenorrhea and recurrence. STUDY DESIGN We utilized a bioinformatics-based strategy to screen for candidate genes and fibroblast growth factor receptor 1(FGFR1) was chosen for further validation. FGFR1 expression was examined in specimens of ectopic and eutopic endometrium obtained from 48 patients with endometriosis and specimens of eutopic endometrium from 26 healthy control subjects using immunohistochemistry and Western blotting. In addition, FGFR shRNA treatment was applied in a nude mice endometriosis model to examine the functional role of FGFR1 in endometriosis formation in vivo. RESULTS FGFR1 was found commonly overexpressed in ectopic endometrium of endometriosis compared with either its eutopic counterpart or endometrium from normal patients (P < 0.05). FGFR shRNA treatment impaired endometriosis formation and alleviated endometriosis-related symptoms in vivo. FGFR1 expression in ectopic endometrium was correlated with dysmenorrhea severity (P < 0.05) and recurrence in endometriosis patients (P < 0.05). CONCLUSION(S) FGFR1 might be involved in endometriosis development, which could possibly serve as a novel therapeutic target and prognostic marker for this disease.
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Yamanaka H, Kobayashi K, Okubo M, Fukuoka T, Noguchi K. Increase of close homolog of cell adhesion molecule L1 in primary afferent by nerve injury and the contribution to neuropathic pain. J Comp Neurol 2011; 519:1597-615. [PMID: 21452236 DOI: 10.1002/cne.22588] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The L1 family of cell adhesion molecules (L1-CAMs) is known to be involved in various neuronal functions such as cell adhesion, axon guidance, and synaptic plasticity. We investigated the detailed expression/changes of a close homolog of the L1 cell adhesion molecule (CHL1) after nerve injury and the possible role on neuropathic pain using the rat spared nerve injury (SNI) model. SNI induced the expression of CHL1 in L4/5 DRG neurons, particularly in small-size injured neurons and in satellite cells. In the spinal cord, CHL1 immunoreactivity increased mainly in laminae I-II of the dorsal horn on the side ipsilateral to the nerve injury. Ultrastructural study clarified the fine localization of CHL1 in axons of primary afferents in the dorsal horn. CHL1 immunoreactivities were localized in the adherence such as axon-axon, axon-dorsal horn neurons (dendrite, soma), and axon-glial cells (astrocyte and microglia). Experimental inhibition of CHL1 adhesion by intrathecal administration of the antibody for CHL1 extracellular domain significantly prevented and reversed SNI-induced mechanical allodynia. Thus, alterations of CHL1 may be involved in the structural plasticity after peripheral nerve injury and have important roles in neuropathic pain.
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Affiliation(s)
- Hiroki Yamanaka
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
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15
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Kaftan H, Reuther L, Miehe B, Hosemann W, Beule A. Inhibition of fibroblast growth factor receptor 1: influence on tympanic membrane wound healing in rats. Eur Arch Otorhinolaryngol 2011; 269:87-92. [DOI: 10.1007/s00405-011-1627-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Accepted: 04/29/2011] [Indexed: 11/29/2022]
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16
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Cui XY, Dai Y, Wang SL, Yamanaka H, Kobayashi K, Obata K, Chen J, Noguchi K. Differential activation of p38 and extracellular signal-regulated kinase in spinal cord in a model of bee venom-induced inflammation and hyperalgesia. Mol Pain 2008; 4:17. [PMID: 18445299 PMCID: PMC2391153 DOI: 10.1186/1744-8069-4-17] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Accepted: 04/30/2008] [Indexed: 12/30/2022] Open
Abstract
Background Honeybee's sting on human skin can induce ongoing pain, hyperalgesia and inflammation. Injection of bee venom (BV) into the intraplantar surface of the rat hindpaw induces an early onset of spontaneous pain followed by a lasting thermal and mechanical hypersensitivity in the affected paw. The underlying mechanisms of BV-induced thermal and mechanical hypersensitivity are, however, poorly understood. In the present study, we investigated the role of mitogen-activated protein kinase (MAPK) in the generation of BV-induced pain hypersensitivity. Results We found that BV injection resulted in a quick activation of p38, predominantly in the L4/L5 spinal dorsal horn ipsilateral to the inflammation from 1 hr to 7 d post-injection. Phosphorylated p38 (p-p38) was expressed in both neurons and microglia, but not in astrocytes. Intrathecal administration of the p38 inhibitor, SB203580, prevented BV-induced thermal hypersensitivity from 1 hr to 3 d, but had no effect on mechanical hypersensitivity. Activated ERK1/2 was observed exclusively in neurons in the L4/L5 dorsal horn from 2 min to 1 d, peaking at 2 min after BV injection. Intrathecal administration of the MEK inhibitor, U0126, prevented both mechanical and thermal hypersensitivity from 1 hr to 2 d. p-ERK1/2 and p-p38 were expressed in neurons in distinct regions of the L4/L5 dorsal horn; p-ERK1/2 was mainly in lamina I, while p-p38 was mainly in lamina II of the dorsal horn. Conclusion The results indicate that differential activation of p38 and ERK1/2 in the dorsal horn may contribute to the generation and development of BV-induced pain hypersensitivity by different mechanisms.
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Affiliation(s)
- Xiu-Yu Cui
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
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Gao YJ, Ji RR. Activation of JNK pathway in persistent pain. Neurosci Lett 2008; 437:180-3. [PMID: 18455869 DOI: 10.1016/j.neulet.2008.03.017] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2007] [Revised: 02/26/2008] [Accepted: 03/08/2008] [Indexed: 12/17/2022]
Abstract
The c-Jun N-terminal kinase (JNK) is a stress-activated member of MAP kinase family. JNK activation has been strongly implicated in inflammatory responses, neurodegeneration, and apoptosis. Recent evidence shows that JNK pathway is also transiently activated in primary sensory neurons after tissue or nerve injury, which is required for the development of hyperalgesia and allodynia. In particular, JNK is persistently activated in astrocytes of the spinal cord after nerve injury, and this activation can maintain central sensitization and mechanical allodynia. In this mini-review, we will provide evidence for the involvement of JNK pathway in regulating persistent pain sensitization. We will also discuss possible upstream signaling mechanisms that cause JNK activation and downstream signaling mechanisms by which JNK modulates pain sensitivity. Thus, targeting JNK pathway might be a useful strategy to treat both neurodegeneration and chronic pain.
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Affiliation(s)
- Yong-Jing Gao
- Pain Research Center, Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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