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Bryson M, Kloefkorn H, Idlett-Ali S, Carrasco DI, Noble DJ, Martin K, Sawchuk MA, Au Yong N, Garraway SM, Hochman S. Emergent epileptiform activity in spinal sensory circuits drives ectopic bursting in afferent axons and sensory dysfunction after cord injury. Pain 2024:00006396-990000000-00676. [PMID: 39106457 DOI: 10.1097/j.pain.0000000000003364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 06/25/2024] [Indexed: 08/09/2024]
Abstract
ABSTRACT Spinal cord injury leads to hyperexcitability and dysfunction in spinal sensory processing. As hyperexcitable circuits can become epileptiform, we explored whether such activity emerges in a thoracic spinal cord injury (SCI) contusion model of neuropathic pain. Recordings from spinal sensory axons in multiple below-lesion segmental dorsal roots demonstrated that SCI facilitated the emergence of spontaneous ectopic burst spiking in afferent axons, which were correlated across multiple adjacent dorsal roots. Burst frequency correlated with behavioral mechanosensitivity. The same bursting events were recruited by afferent stimulation, and timing interactions with ongoing spontaneous bursts revealed that recruitment was limited by a prolonged post-burst refractory period. Ectopic bursting in afferent axons was driven by GABAA receptor activation, presumably by conversion of subthreshold GABAergic interneuronal presynaptic axoaxonic inhibitory actions to suprathreshold spiking. Collectively, the emergence of stereotyped bursting circuitry with hypersynchrony, sensory input activation, post-burst refractory period, and reorganization of connectivity represent defining features of an epileptiform network. Indeed, these same features were reproduced in naive animals with the convulsant 4-aminopyridine (fampridine). We conclude that spinal cord injury promotes the emergence of epileptiform activity in spinal sensory networks that promote profound corruption of sensory signaling. This includes hyperexcitability and bursting by ectopic spiking in afferent axons that propagate bidirectionally by reentrant central and peripheral projections as well as sensory circuit hypoexcitability during the burst refractory period. More broadly, the work links circuit hyperexcitability to epileptiform circuit emergence, further strengthening it as a conceptual basis to understand features of sensory dysfunction and neuropathic pain.
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Affiliation(s)
- Matthew Bryson
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
| | - Heidi Kloefkorn
- Department of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR, United States
| | | | - Dario I Carrasco
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Donald James Noble
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
| | - Karmarcha Martin
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
| | - Michael A Sawchuk
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
| | - Nicholas Au Yong
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, United States
| | - Sandra M Garraway
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
| | - Shawn Hochman
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
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Liu S, Li Q, Wang H, Zhang H, Zhao Q, Su J, Zou J, Feng P, Zhang A. Exercise as a promising alternative for sciatic nerve injury pain relief: a meta-analysis. Front Neurol 2024; 15:1424050. [PMID: 39144705 PMCID: PMC11323690 DOI: 10.3389/fneur.2024.1424050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Accepted: 07/23/2024] [Indexed: 08/16/2024] Open
Abstract
Objective The efficacy of drug therapies in managing neuropathic pain is constrained by their limited effectiveness and potential for adverse effects. In contrast, exercise has emerged as a promising alternative for pain relief. In this study, we conducted a systematic evaluation of the therapeutic impact of exercise on neuropathic pain resulting from sciatic nerve injury in rodent models. Methods The PubMed, Embase, and Web of Science databases were retrieved before April 2024. A series of studies regarding the effect of treadmill, swimming, wheel and other exercises on neuropathic pain induced by sciatic nerve injury in rats and mice were collected. Using predefined inclusion criteria, two researchers independently performed literature screening, data extraction, and methodological quality assessment utilizing SYRCLE's risk of bias tool for animal studies. Statistical analysis was conducted using RevMan 5.3 and STATA 12.0 analysis software. Results A total of 12 relevant academic sources were included in the analysis of controlled animal studies, with 133 rodents in the exercise group and 135 rodents in the sedentary group. The meta-analysis revealed that exercise was associated with a significant increase in paw withdrawal mechanical threshold [Standard Mean Difference (SMD) = 0.84, 95% confidence interval (CI): 0.28-1.40, p = 0.003] and paw withdrawal thermal latency (SMD = 1.54, 95%CI: 0.93-2.15, p < 0.0001) in rats and mice with sciatic nerve injury. Subgroup analyses were conducted to evaluate the impact of exercise duration on heterogeneity. The results showed that postoperative exercise duration ≤3 weeks could significantly elevate paw withdrawal mechanical threshold (SMD = 1.04, 95% CI: 0.62-1.46, p < 0.00001). Postoperative exercise duration ≤4 weeks could significantly improve paw withdrawal thermal latency (SMD = 1.93, 95% CI:1.19-2.67, p < 0.00001). Conclusion Exercise represents an effective method for improving mechanical and thermal hypersensitivity resulting from sciatic nerve injury in rodents. Factors such as pain models, the initiation of exercise, the type of exercise, and the species of rodent do not significantly impact the development of exercise-induced hypoalgesia. However, the duration of postoperative exercise plays a crucial role in the onset of exercise-induced hypoalgesia.
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Affiliation(s)
- Shunxin Liu
- Guangxi University of Chinese Medicine, Nanning, China
| | - Qin Li
- Department of Anesthesiology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Huaiming Wang
- Department of Anesthesiology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Hongwei Zhang
- Department of Anesthesiology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Qi Zhao
- Department of Anesthesiology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Jinjun Su
- Department of Anesthesiology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Jiang Zou
- Department of Anesthesiology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
| | - Pengjiu Feng
- Guangxi University of Chinese Medicine, Nanning, China
- Department of Anesthesiology, Liuzhou Traditional Chinese Medicine Hospital, The Third Affiliated Hospital of Guangxi University of Chinese Medicine, Liuzhou, China
| | - Aimin Zhang
- Department of Anesthesiology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China
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Gandara CK, Palacios JL, Luis Quintanar J, Zhang Y, Li X, Munoz A. Improvement of neurogenic urinary dysfunctions in female rats treated with an injection of botulinum toxin A at the epicenter of the spinal cord injured site. Neurourol Urodyn 2024; 43:246-257. [PMID: 37901953 DOI: 10.1002/nau.25311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/25/2023] [Accepted: 10/11/2023] [Indexed: 10/31/2023]
Abstract
OBJECTIVE To assess the effect of an injection of botulinum toxin A (BoNT/A) at the epicenter of the spinal cord injury (SCI) site on the recovery of lower urinary tract function in female rats with thoracic SCI. MATERIALS AND METHODS Twenty-four female Wistar rats with Sham (laminectomy at T8/T9 level) or SCI (at T8/T9; 30 g compression for 5 s) were assigned into Sham-SS (injected with 5 µL of saline solution), Sham-BoNT/A (injected with 15 pg/rat, equivalent to 7.5 Units/kg of BoNT/A in 5 µL volume), SCI-SS (injured and injected with saline), SCI-BoNT/A (injured and injected with BoNT/A), N = 6 per group. Weekly evaluation of stereotyped micturition behavior, hind-limb nociception, and locomotor activity was performed 1 week before and during 6 weeks after surgery. Subsequently, all groups underwent simultaneous electromyography of the external urethral sphincter (EUS-EMG) and cystometric (CMG) studies. RESULTS A compression SCI at the T8/T9 thoracic level significantly impairs sensory and locomotive functions, as well as stereotyped micturition behavior. However, these impairments were improved by BoNT/A injection after SCI. Neither injections of saline solution nor BoNT/A had an appreciable effect on the same parameters evaluated in the Sham groups. The combined EUS-EMG and CMG evaluations revealed important improvements of lower urinary tract physiology, particularly a reduction in the frequency of non-voiding contractions and the properties of EUS bursting activity indicated as the amplitude of the EUS-EMG signal and duration of burst electrical activity during effective voiding. CONCLUSION The severe impairments on sensory and locomotive functions as well stereotyped micturition caused by an SCI could be potentially attenuated by an injection of a small amount of BoNT/A directly into the epicenter of the SCI region. A reduction in the release of neurotoxic neurotransmitters requiring the SNARE complex may be the mechanism triggered by BoNT/A to reduce neurotoxicity and hyperexcitability created in the SCI area to improve the survival of spinal cord cells involved in micturition.
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Affiliation(s)
- Cynthia K Gandara
- Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, Jalisco, México
| | - Jose L Palacios
- Facultad de Ciencias para el Desarrollo Humano, Universidad Autónoma de Tlaxcala, Tlaxcala, Tlaxcala, Mexico
| | - J Luis Quintanar
- Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Aguascalientes, México
| | - Yingchun Zhang
- Department of Biomedical Engineering, University of Houston, Houston, Texas, USA
| | - Xuhong Li
- Department of Rehabilitation Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Alvaro Munoz
- Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, Jalisco, México
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Bryson M, Kloefkorn H, Idlett-Ali S, Martin K, Garraway SM, Hochman S. Emergent epileptiform activity drives spinal sensory circuits to generate ectopic bursting in intraspinal afferent axons after cord injury. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.03.547522. [PMID: 37461440 PMCID: PMC10349934 DOI: 10.1101/2023.07.03.547522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/14/2024]
Abstract
Spinal cord injury ( SCI ) leads to hyperexcitability and dysfunction in spinal sensory processing. As hyperexcitable circuits can become epileptiform elsewhere, we explored whether such activity emerges in spinal sensory circuits in a thoracic SCI contusion model of neuropathic pain. Recordings from spinal sensory axons in multiple below-lesion segmental dorsal roots ( DRs ) demonstrated that SCI facilitated the emergence of spontaneous ectopic burst spiking in afferent axons, which synchronized across multiple adjacent DRs. Burst frequency correlated with behavioral mechanosensitivity. The same bursting events were recruited by afferent stimulation, and timing interactions with ongoing spontaneous bursts revealed that recruitment was limited by a prolonged post-burst refractory period. Ectopic bursting in afferent axons was driven by GABA A receptor activation, presumably via shifting subthreshold GABAergic interneuronal presynaptic axoaxonic inhibitory actions to suprathreshold spiking. Collectively, the emergence of stereotyped bursting circuitry with hypersynchrony, sensory input activation, post-burst refractory period, and reorganization of connectivity represent defining features of epileptiform networks. Indeed, these same features were reproduced in naïve animals with the convulsant 4-aminopyridine ( 4-AP ). We conclude that SCI promotes the emergence of epileptiform activity in spinal sensory networks that promotes profound corruption of sensory signaling. This corruption includes downstream actions driven by ectopic afferent bursts that propagate via reentrant central and peripheral projections and GABAergic presynaptic circuit hypoexcitability during the refractory period.
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Zhang P, Sun H, Ji Z. Downregulating lncRNA PVT1 Relieves Astrocyte Overactivation Induced Neuropathic Pain Through Targeting miR-186-5p/CXCL13/CXCR5 Axis. Neurochem Res 2021; 46:1457-1469. [PMID: 33742328 DOI: 10.1007/s11064-021-03287-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/26/2021] [Accepted: 02/23/2021] [Indexed: 12/13/2022]
Abstract
Spinal cord injury (SCI) is one of the main causes leading to neuropathic pain. Here, we aim to explore the molecular mechanism and function of lncRNA PVT1 in neuropathic pain induced by SCI. The expression of lncRNA PVT1, microRNA (miR) - 186-5p was measured via quantitative reverse transcription PCR (qRT-PCR), and the activation of astrocytes (labeled by GFAP) was detected by immunohistochemistry. Western blot was conducted to detect the expression of chemokine ligand 13 (CXCL13), chemokine receptor 5 (CXCR5), cyclooxygenase-2 (COX2), inducible nitric oxide synthase (iNOS) and glial fibrillary acidic protein (GFAP) in spinal cord injury lesions. The levels of inflammatory cytokines (including IL-1β and IL-6) and MDA in tissues were examined via Enzyme-linked immunosorbent assay (ELISA). In vitro experiments were also conducted in primary cultured astrocyte to explore the response of astrocyte to lipopolysaccharide (LPS). What's more, the PVT1-miR-186-5p interaction was verified via the dual luciferase activity assay and RNA immunoprecipitation (RIP) assay. The results demonstrated that the levels of PVT1, CXCL13 and CXCR5 were upregulated, while miR-186-5p were decreased in SCI rats' spinal cord and LPS-mediated astrocytes. In the SCI model, PVT1 depletion significantly alleviated neuropathic pain, astrocytic activation and reduced the expression of neuroinflammatory factors and proteins. The relevant mechanism studies confirmed that PVT1 is a competitive endogenous RNA (ceRNA) of miR-186-5p, targets and inhibits its expression and promotes the expression of CXCL13/CXCR5, while miR-186-5p targets CXCL13. In conclusion, inhibition of lncRNA PVT1 alleviates neuropathic pain in SCI rats by upregulating miR-186-5p and down-regulating CXCL13/CXCR5. The PVT1/miR-186-5p/CXCL13/CXCR5 axis can be used as a new therapeutic target for neuropathic pain.
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Affiliation(s)
- Peisong Zhang
- Department of Neurosurgery, Liaocheng People's Hospital, No. 67 Dongchang Road, Liaocheng, 252000, Shandong, China
| | - Hanyu Sun
- Department of Neurosurgery, Liaocheng People's Hospital, No. 67 Dongchang Road, Liaocheng, 252000, Shandong, China
| | - Zhengang Ji
- Department of Neurosurgery, Liaocheng People's Hospital, No. 67 Dongchang Road, Liaocheng, 252000, Shandong, China.
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Spinal caspase-6 regulates AMPA receptor trafficking and dendritic spine plasticity through netrin-1 in postoperative pain after orthopedic surgery for tibial fracture in mice. Pain 2021; 162:124-134. [PMID: 32701657 DOI: 10.1097/j.pain.0000000000002021] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Chronic postoperative pain hinders functional recovery after bone fracture and orthopedic surgery. Recently reported evidence indicates that caspase-6 is important in excitatory synaptic plasticity and pathological pain. Meanwhile, netrin-1 controls postsynaptic recruitment of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) and synaptogenesis. The present work aimed to examine whether caspase-6 and netrin-1 contribute to fracture-induced postoperative allodynia. A mouse model of tibial fracture by intramedullary pinning was generated for inducing postoperative pain. Then, paw withdrawal threshold, spinal caspase-6 activity, netrin-1 secretion, AMPAR trafficking, and spine morphology were examined. Caspase-6 inhibition and netrin-1 knockdown by shRNA were performed to elucidate the pathogenetic mechanism of allodynia and its prevention. Whole-cell patch-clamp recording was performed to assess caspase-6's function in spinal AMPAR-induced current. Tibial fractures after orthopedic operation initiated persistent postsurgical mechanical and cold allodynia, accompanied by increased spinal active caspase-6, netrin-1 release, GluA1-containing AMPAR trafficking, spine density, and AMPAR-induced current in dorsal horn neurons. Caspase-6 inhibition reduced fracture-associated allodynia, netrin-1 secretion, and GluA1 trafficking. Netrin-1 deficiency impaired fracture-caused allodynia, postsynaptic GluA1 recruitment, and spine plasticity. The specific GluA2-lacking AMPAR antagonist NASPM also dose dependently prevented postoperative pain. The reduction of fracture-mediated postoperative excitatory synaptic AMPAR current in the dorsal horn by caspase-6 inhibition was compromised by recombinant netrin-1. Exogenous caspase-6 induced pain hypersensitivity, reversing by netrin-1 knockdown or coapplication of NASPM. Thus, spinal caspase-6 modulation of GluA1-containing AMPAR activation and spine morphology through netrin-1 secretion is important in the development of fracture-related postsurgical pain in the mouse.
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Conesa-Buendía FM, Mediero A, Fujikawa R, Esbrit P, Mulero F, Mahillo-Fernández I, Mues AOD. Beneficial effects of manually assisted chiropractic adjusting instrument in a rabbit model of osteoarthritis. Sci Rep 2020; 10:13237. [PMID: 32764579 PMCID: PMC7413258 DOI: 10.1038/s41598-020-70219-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 07/20/2020] [Indexed: 12/12/2022] Open
Abstract
Osteoarthritis (OA) is a degenerative disease characterized by injury of all joint tissues. Our previous study showed that in experimental osteoporosis, chiropractic manipulation (CM) exerts protective effects on bone. We here assessed whether CM might ameliorate OA by improving subchondral bone sclerosis, cartilage integrity and synovitis. Male New-Zealand rabbits underwent knee surgery to induce OA by anterior cruciate ligament injury. CM was performed using the chiropractic instrument ActivatorV 3 times/week for 8 weeks as follows: force 2 setting was applied to the tibial tubercle of the rabbit right hind limb (TM-OA), whereas the corresponding left hind limb received a false manipulation (FM-OA) consisting of ActivatorV firing in the air and slightly touching the tibial tubercle. After sacrifice, subchondral bone integrity was assessed in the tibiae by microCT and histology. Cartilage damage and synovitis were estimated by Mankin's and Krenn's scores, respectively, and histological techniques. Bone mineral density and content in both cortical and trabecular compartments of subchondral bone decreased in OA rabbits compared to controls, but partially reversed in the TM-OA group. Trabecular bone parameters in the latter group also showed a significant improvement compared to FM-OA group. Moreover RANKL, OPG, ALP and TRAP protein expression in subchondral bone significantly decreased in TM-OA rabbits with respect to FM-OA group. CM was associated with lower Mankin's and Krenn's scores and macrophage infiltrate together with a decreased protein expression of pro-inflammatory, fibrotic and angiogenic factors, in TM-OA rabbits with respect to FM-OA. Our results suggest that CM may mitigate OA progression by improving subchondral bone as well as cartilage and synovial membrane status.
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Affiliation(s)
- F M Conesa-Buendía
- Bone and Joint Research Unit, Institute of Health Research (IIS-Fundación Jiménez Díaz), Madrid, Spain
| | - A Mediero
- Bone and Joint Research Unit, Institute of Health Research (IIS-Fundación Jiménez Díaz), Madrid, Spain
| | - R Fujikawa
- Madrid College of Chiropractic-Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, 28200, San Lorenzo de El Escorial, Madrid, Spain
| | - P Esbrit
- Bone and Joint Research Unit, Institute of Health Research (IIS-Fundación Jiménez Díaz), Madrid, Spain
| | - F Mulero
- Molecular Imaging Unit, Spanish National Cancer Research Center (CNIO), Madrid, Spain
| | - I Mahillo-Fernández
- Epidemiology and Biostatistics Unit (IIS-Fundación Jiménez Díaz), Madrid, Spain
| | - Arantxa Ortega-De Mues
- Madrid College of Chiropractic-Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, 28200, San Lorenzo de El Escorial, Madrid, Spain.
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Ghnenis AB, Burns DT, Osimanjiang W, He G, Bushman JS. A Long-Term Pilot Study on Sex and Spinal Cord Injury Shows Sexual Dimorphism in Functional Recovery and Cardio-Metabolic Responses. Sci Rep 2020; 10:2762. [PMID: 32066802 PMCID: PMC7026076 DOI: 10.1038/s41598-020-59628-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/28/2020] [Indexed: 12/25/2022] Open
Abstract
More than a quarter of a million individuals in the US live with spinal cord injury (SCI). SCI disrupts neural circuitry to vital organs in the body. Despite severe incidences of long-term peripheral complications from SCI, the cardio-metabolic consequences and divergences in sex-related responses are not well described. We examined the effects of SCI on functional recovery, cardiac structure and function, body composition, and glucose metabolism on adult female and male Sprague Dawley (SD) rats. SCI was induced at T10 via contusion. Measured outcomes include behavioral assessment, body weight, dual-energy X-ray absorptiometry (DEXA) for body composition, echocardiography for cardiac structure and function, intraperitoneal glucose tolerance test (IPGTT) for glucose metabolism, insulin tolerance test (ITT), and histology of cardiac structure at the endpoint. There was a decrease in body fat percentage in both sexes, with SCI females disproportionately affected in percent body fat change. Left ventricular internal diameter during systole (LVIDs) was decreased in SCI females more than in SCI males. No significant differences in glucose metabolism were observed up to 20 weeks post-injury (PI). These data show significant cardio-metabolic differences as a consequence of SCI and, furthermore, that sex is an underlying factor in these differences.
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Affiliation(s)
- Adel B Ghnenis
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Daniel T Burns
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Wupu Osimanjiang
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Guanglong He
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA
| | - Jared S Bushman
- University of Wyoming School of Pharmacy, 1000 East University Avenue, Department 3375, Laramie, WY, 82071, USA.
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Duarte FCK, Kolberg C, Riffel APK, Souza JA, Belló-Klein A, Partata WA. Spinal Manipulation Therapy Improves Tactile Allodynia and Peripheral Nerve Functionality and Modulates Blood Oxidative Stress Markers in Rats Exposed to Knee-Joint Immobilization. J Manipulative Physiol Ther 2019; 42:385-398. [PMID: 31371096 DOI: 10.1016/j.jmpt.2018.11.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 06/13/2018] [Accepted: 11/28/2018] [Indexed: 12/16/2022]
Abstract
OBJECTIVE The purpose of our study was to evaluate the effect of manually assisted lumbar spinal manipulation therapy on tactile allodynia, peripheral nerve functional recovery, and oxidative markers in rats exposed to knee immobilization-inducing hypersensitivity. METHODS Tactile allodynia and sciatic, tibial, and peroneal functional indices were assessed before the knee joint immobilization, 24 hours after the knee cast removal, and 24 hours after 3 weeks of lumbar therapy with the Activator Adjusting Instrument, model 4 (AAI 4). Subsequently, the blood was collected from each rat, and oxidative markers such as lipid hydroperoxide levels; nitric oxide metabolites; and superoxide dismutase, catalase, and glutathione peroxidase activities were assessed. RESULTS The AAI 4 improved the immobilization-induced allodynia and recovered the peripheral nerve functional indices impaired after knee immobilization. Immobilized rats treated with AAI 4 therapy presented a lack of significant changes in lipid hydroperoxides and nitric oxide metabolites in the plasma contrasting with rats that were kept freely in their cages, with no therapy applied, which presented elevated lipid hydroperoxides levels. Also, the antioxidant catalase enzymatic activity decreased in the blood of rats immobilized and treated with AAI 4. CONCLUSION These results suggest that manually assisted lumbar spinal manipulation therapy modulates systemic oxidative stress, which possibly contributes to the analgesia and recovery of peripheral nerve functionality.
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Affiliation(s)
- Felipe C K Duarte
- Department of Life Sciences, Canadian Memorial Chiropractic College, Toronto, Ontario, Canada; Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, RS, Brazil.
| | - Carolina Kolberg
- Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, RS, Brazil; America Latina College, Caxias do Sul, RS, Brazil
| | - Ana Paula K Riffel
- Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, RS, Brazil
| | - Jessica A Souza
- Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, RS, Brazil
| | - Adriane Belló-Klein
- Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, RS, Brazil
| | - Wania A Partata
- Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, RS, Brazil
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López-Herradón A, Fujikawa R, Gómez-Marín M, Stedile-Lovatel JP, Mulero F, Ardura JA, Ruiz P, Muñoz I, Esbrit P, Mahíllo-Fernández I, Ortega-de Mues A. Impact of Chiropractic Manipulation on Bone and Skeletal Muscle of Ovariectomized Rats. Calcif Tissue Int 2017; 101:519-529. [PMID: 28755011 DOI: 10.1007/s00223-017-0304-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 07/12/2017] [Indexed: 01/01/2023]
Abstract
Evidence suggests that chiropractic manipulation might exert positive effects in osteoporotic patients. The aim of this study was to evaluate the effects of chiropractic manipulation on bone structure and skeletal muscle in rats with bone loss caused by ovariectomy (OVX). The 6-month old Sprague-Dawley rats at 10 weeks following OVX or sham operation (Sh) did not suffer chiropractic manipulation (NM group) or were submitted to true chiropractic manipulation using the chiropractic adjusting instrument Activator V® three times/week for 6 weeks as follows: Force 1 setting was applied onto the tibial tubercle of the rat right hind limb (TM group), whereas the corresponding left hind limb received a false manipulation (FM group) consisting of ActivatorV® firing in the air and slightly touching the tibial tubercle. Bone mineral density (BMD) and bone mineral content (BMC) were determined in long bones and L3-L4 vertebrae in all rats. Femora and tibia were analyzed by μCT. Mechano growth factor (MGF) was detected in long bones and soleus, quadriceps and tibial muscles by immunohistochemistry and Western blot. The decrease of BMD and BMC as well as trabecular bone impairment in the long bones of OVX rats vs Sh controls was partially reversed in the TM group versus FM or NM rats. This bone improvement by chiropractic manipulation was associated with an increased MGF expression in the quadriceps and the anterior tibial muscle in OVX rats. These findings support the notion that chiropractic manipulation can ameliorate osteoporotic bone at least partly by targeting skeletal muscle.
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Affiliation(s)
- A López-Herradón
- Madrid College of Chiropractic, Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, San Lorenzo de El Escorial, 28200, Madrid, Spain
- Laboratorio de Metabolismo Mineral y Óseo, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz-UAM, Madrid, Spain
| | - R Fujikawa
- Madrid College of Chiropractic, Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, San Lorenzo de El Escorial, 28200, Madrid, Spain
| | - M Gómez-Marín
- Madrid College of Chiropractic, Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, San Lorenzo de El Escorial, 28200, Madrid, Spain
| | - J P Stedile-Lovatel
- Madrid College of Chiropractic, Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, San Lorenzo de El Escorial, 28200, Madrid, Spain
| | - F Mulero
- Unidad de Imagen Molecular, Centro Nacional de Investigaciones Oncológicas (CNIO), Madrid, Spain
| | - J A Ardura
- Laboratorio de Metabolismo Mineral y Óseo, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz-UAM, Madrid, Spain
| | - P Ruiz
- Madrid College of Chiropractic, Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, San Lorenzo de El Escorial, 28200, Madrid, Spain
| | - I Muñoz
- Madrid College of Chiropractic, Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, San Lorenzo de El Escorial, 28200, Madrid, Spain
| | - P Esbrit
- Laboratorio de Metabolismo Mineral y Óseo, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz-UAM, Madrid, Spain
| | - I Mahíllo-Fernández
- Unidad de Epidemiología y Bioestadística, IIS-Fundación Jiménez Díaz-UAM, Madrid, Spain
| | - A Ortega-de Mues
- Madrid College of Chiropractic, Real Centro Universitario Escorial-María Cristina, Paseo de los Alamillos, 2, San Lorenzo de El Escorial, 28200, Madrid, Spain.
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Botelho MB, Alvarenga BAP, Molina N, Ribas M, Baptista AF. Spinal Manipulative Therapy and Sports Performance Enhancement: A Systematic Review. J Manipulative Physiol Ther 2017; 40:535-543. [PMID: 29191288 DOI: 10.1016/j.jmpt.2017.03.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 03/04/2017] [Accepted: 03/14/2017] [Indexed: 12/16/2022]
Abstract
OBJECTIVE The purpose of this study was to review the literature regarding the relationship between spinal manipulative therapy (SMT) and sports performance. METHODS PubMed and Embase databases were searched for original studies published up to July 2016. Inclusion criteria were if SMT has been applied to athletes and if any sports performance-related outcome was measured. RESULTS Of the 581 potential studies, 7 clinical trials were selected. Most studies had adequate quality (≥6/11) when assessed by the PEDro scale. None of those studies assessed performance at an event or competition. Four studies revealed improvement in a sports performance test after SMT. Meta-analysis could not be performed because of the wide differences in methodologies, design, and outcomes measured. Spinal manipulative therapy influences a wide range of neurophysiological parameters that could be associated with sports performance. Of the 3 studies where SMT did not improve test performance, 2 used SMT not for therapeutic correction of a dysfunctional vertebral joint but to an arbitrary previously set joint. CONCLUSIONS Although 4 of 7 studies showed that SMT improved sports performance tests, the evidence is still weak to support its use. Spinal manipulative therapy may be a promising approach for performance enhancement that should be investigated with more consistent methodologic designs.
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Affiliation(s)
- Marcelo B Botelho
- Graduate Program in Medicine and Health, Faculty of Medicine, Federal University of Bahia, Salvador, Bahia, Brazil.
| | | | - Nícolly Molina
- Graduate Program in Medicine and Health, Faculty of Medicine, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Marcos Ribas
- Graduate Program in Medicine and Health, Faculty of Medicine, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Abrahão F Baptista
- Center for Mathematics, Computation and Cognition, Federal University of ABC, São Bernardo do Campo, São Paulo, Brazil
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Early-onset treadmill training reduces mechanical allodynia and modulates calcitonin gene-related peptide fiber density in lamina III/IV in a mouse model of spinal cord contusion injury. Pain 2016; 157:687-697. [PMID: 26588690 DOI: 10.1097/j.pain.0000000000000422] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Below-level central neuropathic pain (CNP) affects a large proportion of spinal cord injured individuals. To better define the dynamic changes of the spinal cord neural network contributing to the development of CNP after spinal cord injury (SCI), we characterized the morphological and behavioral correlates of CNP in female C57BL/6 mice after a moderate T11 contusion SCI (50 kdyn) and the influence of moderate physical activity. Compared with sham-operated animals, injured mice developed mechanical allodynia 2 weeks post injury when tested with small-diameter von Frey hair filaments (0.16 g and 0.4 g filament), but presented hyporesponsiveness to noxious mechanical stimuli (1.4 g filament). The mechano-sensory alterations lasted up to 35 days post injury, the longest time point examined. The response latency to heat stimuli already decreased significantly 10 days post injury reaching a plateau 2 weeks later. In contrast, injured mice developed remarkable hyposensitivity to cold stimuli. Animals that underwent moderate treadmill training (2 × 15 minutes; 5 d/wk) showed a significant reduction in the response rate to light mechanical stimuli as early as 6 days after training. Calcitonin gene-related peptide (CGRP) labeling in lamina III-IV of the dorsal horn revealed significant increases in CGRP-labeling density in injured animals compared with sham control animals. Importantly, treadmill training reduced CGRP-labeling density by about 50% (P < 0.01), partially reducing the injury-induced increases. Analysis of IB4-labeled nonpeptidergic sensory fibers revealed no differences between experimental groups. Abnormalities in temperature sensation were not influenced by physical activity. Thus, treadmill training partially resolves signs of below-level CNP after SCI and modulates the density of CGRP-labeled fibers.
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Santos-Júnior FFU, Pires ADF, Ribeiro NM, Mendonça VA, Alves JO, Soares PM, Ceccatto VM, Assreuy AMS. Sensorial, structural and functional response of rats subjected to hind limb immobilization. Life Sci 2015; 137:158-63. [PMID: 26231696 DOI: 10.1016/j.lfs.2015.07.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 06/16/2015] [Accepted: 07/21/2015] [Indexed: 10/23/2022]
Abstract
AIMS This study analyzed the sensorial, structural and functional response of rats subjected to paw immobilization. MAIN METHODS Animal pelvis, hip, knee and ankle were immobilized using waterproof tape during two weeks for assessment of sensorial response to thermal (hot plate test) and mechanical stimuli (Von Frey test), motor system structure (histology and radiography) and muscle function (soleus contractility). KEY FINDINGS Disuse animals became more responsive to thermal stimuli (49%), although less responsive to mechanical challenge (58%). Disuse animals showed local injuries such as reduction in muscle fiber diameter (16.7% in gastrocnemius, 5.7% in soleus), contractile activity (55% of the control maximal tonic contraction) and tibia cortical thickness (9.3%), besides increased nitrite:protein ratio, suggestive of protein degradation. Disuse also evoked systemic adaptations that include increase in serum lactate dehydrogenase (36.1%) and alkaline phosphatase (400%), but reduction in calcium (8.4%) and total serum protein (5.5%), especially albumin (34.2%). SIGNIFICANCE Two weeks of functional paw disuse leads to local and systemic harmful adaptive changes in sensorial and structural systems. This study brings new insights into nervous and motor system mechanism associated with therapeutic limb immobilization in muscle and skeletal pathological conditions.
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Affiliation(s)
| | - Alana de Freitas Pires
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará (UECE), Fortaleza, CE, Brazil
| | - Natália Matos Ribeiro
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará (UECE), Fortaleza, CE, Brazil
| | - Vanessa Azevedo Mendonça
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará (UECE), Fortaleza, CE, Brazil
| | - Juliana Osório Alves
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará (UECE), Fortaleza, CE, Brazil
| | - Paula Matias Soares
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará (UECE), Fortaleza, CE, Brazil
| | - Vânia Marilande Ceccatto
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará (UECE), Fortaleza, CE, Brazil.
| | - Ana Maria Sampaio Assreuy
- Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará (UECE), Fortaleza, CE, Brazil
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Haldeman S, Chapman-Smith D. Award-winning articles and posters from the World Federation of Chiropractic's 12th Biennial Congress 2013. J Manipulative Physiol Ther 2014; 37:1-6. [PMID: 24373381 DOI: 10.1016/j.jmpt.2013.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
This editorial reviews the original research submissions to the World Federation of Chiropractic's 12th Biennial Congress held in Durban, South Africa from April 10 - 13, 2013, and the four award-winning scientific articles in the NCMIC Louis Sportelli Research Awards competition at the Congress which are published in this issue of the Journal of Manipulative and Physiological Therapeutics.
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Affiliation(s)
- Scott Haldeman
- Chairman, Research Council, World Federation of Chiropractic, Department of Neurology, University of California, Irvine, Calif.
| | - David Chapman-Smith
- Secretary General, World Federation of Chiropractic, Toronto, Ontario, Canada
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Duarte FCK, Kolberg C, Barros RR, Silva VGA, Gehlen G, Vassoler JM, Partata WA. Evaluation of peak force of a manually operated chiropractic adjusting instrument with an adapter for use in animals. J Manipulative Physiol Ther 2014; 37:236-41. [PMID: 24793371 DOI: 10.1016/j.jmpt.2014.02.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 01/20/2014] [Accepted: 02/25/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE This study was designed to assess the peak force of a manually operated chiropractic adjusting instrument, the Activator Adjusting Instrument 4 (AAI 4), with an adapter for use in animals, which has a 3- to 4-fold smaller contact surface area than the original rubber tip. METHODS Peak force was determined by thrusting the AAI 4 with the adapter or the original rubber tip onto a load cell. First, the AAI 4 was applied perpendicularly by a doctor of chiropractic onto the load cell. Then, the AAI 4 was fixed in a rigid framework and applied to the load cell. This procedure was done to prevent any load on the load cell before the thrust impulse. In 2 situations, trials were performed with the AAI 4 at all force settings (settings I, II, III, and IV, minimum to maximum, respectively). A total of 50000 samples per second over a period of 3 seconds were collected. RESULTS In 2 experimental protocols, the use of the adapter in the AAI 4 increased the peak force only with setting I. The new value was around 80% of the maximum value found for the AAI 4. Nevertheless, the peak force values of the AAI 4 with the adapter and with the original rubber tip in setting IV were similar. CONCLUSION The adapter effectively determines the maximum peak force value at force setting I of AAI 4.
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Affiliation(s)
- Felipe Coutinho Kullmann Duarte
- Academic Researcher, Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, Brazil.
| | - Carolina Kolberg
- Academic Researcher, Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, Brazil
| | - Rodrigo R Barros
- Technician, Department of Mechanical Engineering, School of Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Günter Gehlen
- Professor, Chiropractic Graduation Program from Feevale University, Novo Hamburgo, Brazil
| | - Jakson M Vassoler
- Professor and Academic Researcher, Department of Mechanical Engineering, School of Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Wania A Partata
- Professor and Academic Researcher, Department of Physiology, Institute of Basic Health Science, Federal University of Rio Grande do Sul/UFRGS, Porto Alegre, Brazil
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Chowdhury P, Long A, Harris G, Soulsby ME, Dobretsov M. Animal model of simulated microgravity: a comparative study of hindlimb unloading via tail versus pelvic suspension. Physiol Rep 2013; 1:e00012. [PMID: 24303103 PMCID: PMC3831940 DOI: 10.1002/phy2.12] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 05/04/2013] [Accepted: 05/20/2013] [Indexed: 12/21/2022] Open
Abstract
The aim of this study was to compare physiological effects of hindlimb suspension (HLS) in tail- and pelvic-HLS rat models to determine if severe stretch in the tail-HLS rats lumbosacral skeleton may contribute to the changes traditionally attributed to simulated microgravity and musculoskeletal disuse in the tail-HLS model. Adult male Sprague-Dawley rats divided into suspended and control-nonsuspended groups were subjected to two separate methods of suspension and maintained with regular food and water for 2 weeks. Body weights, food and water consumption, soleus muscle weight, tibial bone mineral density, random plasma insulin, and hindlimb pain on pressure threshold (PPT) were measured. X-ray analysis demonstrated severe lordosis in tail- but not pelvic-HLS animals. However, growth retardation, food consumption, and soleus muscle weight and tibial bone density (decreased relative to control) did not differ between two HLS models. Furthermore, HLS rats developed similar levels of insulinopenia and mechanical hyperalgesia (decreased PPT) in both tail- and pelvic-HLS groups. In the rat-to-rat comparisons, the growth retardation and the decreased PPT observed in HLS-rats was most associated with insulinopenia. In conclusion, these data suggest that HLS results in mild prediabetic state with some signs of pressure hyperalgesia, but lumbosacral skeleton stretch plays little role, if any, in these pathological changes.
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Affiliation(s)
- Parimal Chowdhury
- Department of Physiology and Biophysics, University of Arkansas for Medical SciencesLittle Rock, Arkansas, 72205
| | - Ashley Long
- Department of Physiology and Biophysics, University of Arkansas for Medical SciencesLittle Rock, Arkansas, 72205
| | - Gabrielle Harris
- Department of Physiology and Biophysics, University of Arkansas for Medical SciencesLittle Rock, Arkansas, 72205
| | - Michael E Soulsby
- Department of Physiology and Biophysics, University of Arkansas for Medical SciencesLittle Rock, Arkansas, 72205
| | - Maxim Dobretsov
- Department of Anesthesiology, University of Arkansas for Medical SciencesLittle Rock, Arkansas, 72205
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical SciencesLittle Rock, Arkansas, 72205
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Evaluation of Mechanical Allodynia in an Animal Immobilization Model Using the Von Frey Method. J Manipulative Physiol Ther 2012; 35:657; author reply 657-8. [DOI: 10.1016/j.jmpt.2012.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Indexed: 11/22/2022]
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Gehlen G. In Reply. J Manipulative Physiol Ther 2012. [DOI: 10.1016/j.jmpt.2012.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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