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Wuerfel T, Schmitz C, Jokinen LLJ. The Effects of the Exposure of Musculoskeletal Tissue to Extracorporeal Shock Waves. Biomedicines 2022; 10:biomedicines10051084. [PMID: 35625821 PMCID: PMC9138291 DOI: 10.3390/biomedicines10051084] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/01/2022] [Accepted: 05/04/2022] [Indexed: 12/14/2022] Open
Abstract
Extracorporeal shock wave therapy (ESWT) is a safe and effective treatment option for various pathologies of the musculoskeletal system. Many studies address the molecular and cellular mechanisms of action of ESWT. However, to date, no uniform concept could be established on this matter. In the present study, we perform a systematic review of the effects of exposure of musculoskeletal tissue to extracorporeal shock waves (ESWs) reported in the literature. The key results are as follows: (i) compared to the effects of many other forms of therapy, the clinical benefit of ESWT does not appear to be based on a single mechanism; (ii) different tissues respond to the same mechanical stimulus in different ways; (iii) just because a mechanism of action of ESWT is described in a study does not automatically mean that this mechanism is relevant to the observed clinical effect; (iv) focused ESWs and radial ESWs seem to act in a similar way; and (v) even the most sophisticated research into the effects of exposure of musculoskeletal tissue to ESWs cannot substitute clinical research in order to determine the optimum intensity, treatment frequency and localization of ESWT.
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Argueta DA, Aich A, Lei J, Kiven S, Nguyen A, Wang Y, Gu J, Zhao W, Gupta K. β-endorphin at the intersection of pain and cancer progression: Preclinical evidence. Neurosci Lett 2020; 744:135601. [PMID: 33387660 DOI: 10.1016/j.neulet.2020.135601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/20/2022]
Abstract
We examined the association between endogenous opioid β-endorphin, cancer progression and pain in a transgenic mouse model of breast cancer, with a rat C3(1) simian virus 40 large tumor antigen fusion gene (C3TAg). C3TAg mice develop ductal epithelial atypia at 8 weeks, progression to intra-epithelial neoplasia at 12 weeks, and invasive carcinoma with palpable tumors at 16 weeks. Consistent with invasive carcinoma at 4 months of age, C3TAg mice demonstrate a significant increase in hyperalgesia compared to younger C3TAg or control FVBN mice without tumors. Our data show that the growing tumor contributes to circulating β-endorphin. As an endogenous ligand of mu opioid receptor, β-endorphin has analgesic activity. Paradoxically, we observed an increase in pain in transgenic breast cancer mice with significantly high circulating and tumor-associated β-endorphin. Increased circulating β-endorphin correlates with increasing tumor burden. β-endorphin induced the activation of mitogenic and survival-promoting signaling pathways, MAPK/ERK 1/2, STAT3 and Akt, observed by us in human MDA-MB-231 cells suggesting a role for β-endorphin in breast cancer progression and associated pain.
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Affiliation(s)
- Donovan A Argueta
- Hematology/Oncology, Department of Medicine, University of California, Irvine, CA, USA
| | - Anupam Aich
- Hematology/Oncology, Department of Medicine, University of California, Irvine, CA, USA
| | - Jianxun Lei
- Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Stacy Kiven
- Hematology/Oncology, Department of Medicine, University of California, Irvine, CA, USA
| | - Aithanh Nguyen
- Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Ying Wang
- Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN, USA; Department of Anesthesia, Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Joshua Gu
- Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, CA, USA; Chao Family Comprehensive Cancer Center, University of California, Irvine, CA, USA; Department of Biological Chemistry, University of California, Irvine, CA, USA
| | - Weian Zhao
- Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, CA, USA; Chao Family Comprehensive Cancer Center, University of California, Irvine, CA, USA; Department of Biological Chemistry, University of California, Irvine, CA, USA; Department of Pharmaceutical Sciences, University of California, Irvine, CA, USA; Edwards Life Sciences Center for Advanced Cardiovascular Technology, University of California, Irvine, CA, USA; Department of Biomedical Engineering, University of California, Irvine, CA, USA
| | - Kalpna Gupta
- Hematology/Oncology, Department of Medicine, University of California, Irvine, CA, USA; Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN, USA; Southern California Institute for Research and Education, VA Medical Center, Long Beach, CA, USA.
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Ren H, Jin H, Jia Z, Ji N, Luo F. Pulsed Radiofrequency Applied to the Sciatic Nerve Improves Neuropathic Pain by Down-regulating The Expression of Calcitonin Gene-related Peptide in the Dorsal Root Ganglion. Int J Med Sci 2018; 15:153-160. [PMID: 29333099 PMCID: PMC5765728 DOI: 10.7150/ijms.20501] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 07/06/2017] [Indexed: 01/12/2023] Open
Abstract
Background: Clinical studies have shown that applying pulsed radiofrequency (PRF) to the neural stem could relieve neuropathic pain (NP), albeit through an unclear analgesic mechanism. And animal experiments have indicated that calcitonin gene-related peptide (CGRP) expressed in the dorsal root ganglion (DRG) is involved in generating and maintaining NP. In this case, it is uncertain whether PRF plays an analgesic role by affecting CGRP expression in DRG. Methods: Rats were randomly divided into four groups: Groups A, B, C, and D. In Groups C and D, the right sciatic nerve was ligated to establish the CCI model, while in Groups A and B, the sciatic nerve was isolated without ligation. After 14 days, the right sciatic nerve in Groups B and D re-exposed and was treated with PRF on the ligation site. Thermal withdrawal latency (TWL) and hindpaw withdrawal threshold (HWT) were measured before PRF treatment (Day 0) as well as after 2, 4, 8, and 14 days of treatment. At the same time points of the behavioral tests, the right L4-L6 DRG was sampled and analyzed for CGRP expression using RT-qPCR and an enzyme-linked immunosorbent assay (ELISA). Results: Fourteen days after sciatic nerve ligation, rats in Groups C and D had a shortened TWL (P<0.001) and a reduced HWT (P<0.001) compared to those in Groups A and B. After PRF treatment, the TWL of the rats in Group D gradually extended with HWT increasing progressively. Prior to PRF treatment (Day 0), CGRP mRNA expressions in the L4-L6 DRG of Groups C and D increased significantly (P<0.001) and were 2.7 and 2.6 times that of Group A respectively. ELISA results showed that the CGRP content of Groups C and D significantly increased in comparison with that of Groups A and B (P<0.01). After PRF treatment, the mRNA expression in the DRG of Group D gradually decreased and the mRNA expression was 1.7 times that of Group A on the 4th day(P> 0.05). On the 8th and 14th days, the mRNA levels in Group D were restored to those of Groups A and B. Meanwhile, the CGRP content of Group D gradually dropped over time, from 76.4 pg/mg (Day 0) to 57.5 pg/mg (Day 14). Conclusions: In this study, we found that, after sciatic nerve ligation, rats exhibited apparent hyperalgesia and allodynia, and CGRP mRNA and CGRP contents in the L4-L6 DRG increased significantly. Through lowering CGRP expression in the DRG, PRF treatment might relieve the pain behaviors of NP.
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Affiliation(s)
- Hao Ren
- Department of Anesthesiology and Pain Management, Beijing Tiantan Hospital, Capital Medical University
| | - Hailong Jin
- Department of Anesthesiology and Pain Management, Beijing Tiantan Hospital, Capital Medical University
| | - Zipu Jia
- Department of Anesthesiology and Pain Management, Beijing Tiantan Hospital, Capital Medical University
| | - Nan Ji
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University
| | - Fang Luo
- Department of Anesthesiology and Pain Management, Beijing Tiantan Hospital, Capital Medical University
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Abstract
This paper is the thirty-sixth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2013 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia; stress and social status; tolerance and dependence; learning and memory; eating and drinking; alcohol and drugs of abuse; sexual activity and hormones, pregnancy, development and endocrinology; mental illness and mood; seizures and neurologic disorders; electrical-related activity and neurophysiology; general activity and locomotion; gastrointestinal, renal and hepatic functions; cardiovascular responses; respiration and thermoregulation; and immunological responses.
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY 11367, United States.
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Shibayama M, Kuniyoshi K, Suzuki T, Yamauchi K, Ohtori S, Takahashi K. The effects of locally injected triamcinolone on entrapment neuropathy in a rat chronic constriction injury model. J Hand Surg Am 2014; 39:1714-21. [PMID: 25017582 DOI: 10.1016/j.jhsa.2014.05.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 05/09/2014] [Accepted: 05/09/2014] [Indexed: 02/02/2023]
Abstract
PURPOSE Patients with idiopathic carpal tunnel syndrome are commonly treated by steroid injections into the carpal tunnel. We administered triamcinolone (Tr) to chronic constriction injury model rats. We hypothesized that Tr administration would have both favorable behavioral effects and quantifiable immunohistological effects on compressed nerves. METHODS Thirty-six male Wister rats were used. For rats to be treated with Tr, we loosely ligated their right sciatic nerves at 4 sites. Sham rats had their nerves exposed without ligation. On postoperative day 7, we reexposed their ligated nerves, after which we delivered either 0.1 mg of Tr (0.1-mg group), 0.5 mg of Tr (0.5-mg group), or normal saline (saline group) around the nerve fibers at the injured sites. Gait was analyzed, and allodynia was assessed with von Frey hairs, before surgery and on postoperative days 3, 7, 10, 14, and 21. The right sciatic nerve was resected and stained using hematoxylin-eosin, and the fourth and fifth lumbar dorsal root ganglia (DRG) were removed and assessed by immunohistochemistry for calcitonin gene-related peptide (CGRP) and activating transcription factor 3 (ATF3) on postoperative day 21. In addition, interleukin-1β (IL-1β) in sciatic nerve was quantified using enzyme-linked immunosorbent assays. RESULTS Mechanical allodynia was significantly decreased in the 0.5-mg group compared with the saline group. In hematoxylin-eosin sections, the extent of inflammation-induced edema between the nerve fibers and infiltration of inflammatory cells was significantly reduced in the 0.5-mg group compared with the saline group. IL-1β levels at the sciatic nerve in the 0.5-mg group were significantly lower than those in the saline group. CONCLUSIONS Tr-treated chronic constriction injury rats exhibited significant alleviation of sensory disturbance, edema, inflammation, and pain-related peptide upregulation. These phenomena suggest the validity of Tr administration as a treatment affecting the nerve itself. TYPE OF STUDY/LEVEL OF EVIDENCE Therapeutic I.
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Affiliation(s)
- Masataka Shibayama
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan.
| | - Kazuki Kuniyoshi
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takane Suzuki
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Kazuyo Yamauchi
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Seiji Ohtori
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Kazuhisa Takahashi
- Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
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