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Ko PY, Hsu CC, Chen SY, Li CL, Jou IM, Wu PT. The Pulsed Nd:YAG Laser Therapy Enhanced Nerve Regeneration via Apoptosis Inhibition in a Rat Crushed Sciatic Nerve Model. Neurochem Res 2024; 49:949-958. [PMID: 38157112 DOI: 10.1007/s11064-023-04068-7] [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: 07/01/2023] [Revised: 08/28/2023] [Accepted: 11/14/2023] [Indexed: 01/03/2024]
Abstract
The study was aimed to validate the efficacy of the pulsed Nd:YAG laser on nerve regeneration in a rat sciatic nerve crushed model. 54 Wistar rats were randomly assigned into three groups: shame control, crush control, and laser treated group. For the laser treated group, the pulsed Nd:YAG laser (10 Hz) with 350 mJ per pulse in energy density and 50 J/cm2 in fluence was applied extracorporeally at the lesion site for 12 min to daily deliver 500 J immediately and consecutive 9 days following the crush injury. At week 1, the apoptosis-related activities in the injured nerve were examined (n = 8/each group). The sciatic functional index (SFI) was measured preoperatively and weekly until 4 weeks after the index procedure. The injured nerve and the innervated gastrocnemius muscle histology were assessed at week 4 (n = 10/each group). At week 1, the laser group showed the significant less TUNEL-positive ratio (P < 0.05), and the lower expression of cleaved caspase3/procaspase-3 and beclin-2/beclin-2-associated protein X ratios compared with the crush control. Furthermore, the laser group revealed significantly better SFI since week 1 and throughout the study (P < 0.05, all) compared with the crush control. At week 4, the laser group showed significantly higher axon density, lower myelin g-ratio, and the corresponding higher glycogen expression (P < 0.05, all) in the gastrocnemius muscle compared with those in the crush control. The pulsed Nd:YAG might enhance the injured nerve regeneration via apoptosis inhibition.
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Affiliation(s)
- Po-Yen Ko
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 1 University Road, East District, Tainan, 701, Taiwan
| | - Che-Chia Hsu
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 1 University Road, East District, Tainan, 701, Taiwan
| | - Shih-Yao Chen
- Department of Nursing, College of Nursing, Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - Chia-Lung Li
- Department of Orthopedics, Tainan Hospital, Ministry of Health and Welfare, Tainan, Taiwan
| | - I-Ming Jou
- Department of Orthopedics, E-Da Hospital, Kaohsiung, Taiwan
- School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
- GEG Orthopedic Clinic, Tainan, Taiwan
| | - Po-Ting Wu
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 1 University Road, East District, Tainan, 701, Taiwan.
- Department of Orthopedics, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
- Medical Device Innovation Center, National Cheng Kung University, Tainan, 70101, Taiwan.
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Fellin CR, Steiner RC, Buchen JT, Anders JJ, Jariwala SH. Photobiomodulation and Vascularization in Conduit-Based Peripheral Nerve Repair: A Narrative Review. Photobiomodul Photomed Laser Surg 2024; 42:1-10. [PMID: 38109199 DOI: 10.1089/photob.2023.0103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023] Open
Abstract
Background: Peripheral nerve injuries pose a significant clinical issue for patients, especially in the most severe cases wherein complete transection (neurotmesis) results in total loss of sensory/motor function. Nerve guidance conduits (NGCs) are a common treatment option that protects and guides regenerating axons during recovery. However, treatment outcomes remain limited and often fail to achieve full reinnervation, especially in critically sized defects (>3 cm) where a lack of vascularization leads to neural necrosis. Conclusions: A multitreatment approach is, therefore, necessary to improve the efficacy of NGCs. Stimulating angiogenesis within NGCs can help alleviate oxygen deficiency through rapid inosculation with the host vasculature, whereas photobiomodulation therapy (PBMT) has demonstrated beneficial therapeutic effects on regenerating nerve cells and neovascularization. In this review, we discuss the current trends of NGCs, vascularization, and PBMT as treatments for peripheral nerve neurotmesis and highlight the need for a combinatorial approach to improve functional and clinical outcomes.
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Affiliation(s)
- Christopher R Fellin
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, USA
- The Center for Rehabilitation Sciences Research, Department of Physical Medicine and Rehabilitation, Uniformed Services University of Health Sciences, Bethesda, Maryland, USA
| | - Richard C Steiner
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, USA
- The Center for Rehabilitation Sciences Research, Department of Physical Medicine and Rehabilitation, Uniformed Services University of Health Sciences, Bethesda, Maryland, USA
| | - Jack T Buchen
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, USA
- The Center for Rehabilitation Sciences Research, Department of Physical Medicine and Rehabilitation, Uniformed Services University of Health Sciences, Bethesda, Maryland, USA
| | - Juanita J Anders
- Department of Anatomy, Physiology and Genetics, Uniformed Services University of Health Sciences, Bethesda, Maryland, USA
| | - Shailly H Jariwala
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, USA
- The Center for Rehabilitation Sciences Research, Department of Physical Medicine and Rehabilitation, Uniformed Services University of Health Sciences, Bethesda, Maryland, USA
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Lee JH, Carpena NT, Kim S, Lee MY, Jung JY, Choi JE. Photobiomodulation at a wavelength of 633 nm leads to faster functional recovery than 804 nm after facial nerve injury. JOURNAL OF BIOPHOTONICS 2021; 14:e202100159. [PMID: 34251083 DOI: 10.1002/jbio.202100159] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/04/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
We analyzed the effects of photobiomodulation (PBM) of various wavelengths on regeneration of the facial nerve using in vitro and in vivo experimental models. We assessed the antioxidative effect of PBM in geniculate ganglion neurons irradiated with a diode laser at 633 nm, 780 nm and 804 nm. Wavelengths of 633 and 780 nm but not 804 nm inhibited cell death by oxidative stress. We assessed the effects of PBM on functional and morphologic recovery in rats divided into control, facial nerve damage (FND) and FND irradiated with a 633 nm or 804 nm lasers. Injured rats treated with 633-nm light had better facial palsy scores, larger axon diameter and higher expression of Schwann cells compared with the FND group. No positive results were observed in rats irradiated at 804-nm light. These findings indicate that 633-nm PBM promotes accelerated nerve regeneration and improved functional recovery in an injured facial nerve.
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Affiliation(s)
- Jae-Hun Lee
- Medical Laser Research Center, College of Medicine, Dankook University, Cheonan, South Korea
| | - Nathaniel T Carpena
- Medical Laser Research Center, College of Medicine, Dankook University, Cheonan, South Korea
| | - Sehwan Kim
- Medical Laser Research Center, College of Medicine, Dankook University, Cheonan, South Korea
| | - Min Young Lee
- Medical Laser Research Center, College of Medicine, Dankook University, Cheonan, South Korea
- Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, College of Medicine, Dankook University, Cheonan, South Korea
| | - Jae Yun Jung
- Medical Laser Research Center, College of Medicine, Dankook University, Cheonan, South Korea
- Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, College of Medicine, Dankook University, Cheonan, South Korea
| | - Ji Eun Choi
- Medical Laser Research Center, College of Medicine, Dankook University, Cheonan, South Korea
- Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, College of Medicine, Dankook University, Cheonan, South Korea
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Della Santa GML, Ferreira MC, Machado TPG, Oliveira MX, Santos AP. Effects of Photobiomodulation Therapy (LED 630 nm) on Muscle and Nerve Histomorphometry after Axonotmesis. Photochem Photobiol 2021; 97:1116-1122. [PMID: 33714216 DOI: 10.1111/php.13415] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/10/2021] [Indexed: 12/12/2022]
Abstract
Peripheral injuries constitute a substantial clinical problem with unsatisfactory treatment. The study's objective was to analyze the effects of photobiomodulation therapy (PBMT) on median nerve regeneration and muscle recovery after axonotmesis. Twenty-four rats were randomized into three groups: control (CG), injury (IG), and LED therapy (LEDG). A 630 ± 20 nm (300-mW) LED was placed in contact with the skin. One point over the injury site was irradiated for 30 s, delivering 9 J (9 J cm-2 ). PBMT irradiation was performed once daily for 5 days followed by two-day interval and then more five consecutive days of treatment. Proximal and distal segments of the nerve and flexors muscles were removed for histomorphometric analysis using H&E staining for muscles and osmium tetroxide for nerves. The myelinated fiber and axon diameter and the myelin sheath thickness were greater in the proximal and distal nerve segments in the LEDG compared to the IG (P ≤ 0.05). The number of myelinated fibers was greater in the distal segment of the LEDG (P ≤ 0.05). The area, circumference, and diameter of the muscle fibers were larger in the LEDG than in the IG (P ≤ 0.05). The PBMT protocol used favored axonal regeneration and muscle recovery.
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Affiliation(s)
- Giovanna Moura Lamas Della Santa
- Programa de Pós-Graduação em Reabilitação e Desempenho Funcional, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
| | - Marcílio Coelho Ferreira
- Programa de Pós-Graduação em Reabilitação e Desempenho Funcional, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
- Departamento de Fisioterapia, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
| | - Thaís Peixoto Gaiad Machado
- Programa de Pós-Graduação em Reabilitação e Desempenho Funcional, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
- Departamento de Fisioterapia, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
| | - Murilo Xavier Oliveira
- Programa de Pós-Graduação em Reabilitação e Desempenho Funcional, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
- Departamento de Fisioterapia, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
| | - Ana Paula Santos
- Programa de Pós-Graduação em Reabilitação e Desempenho Funcional, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
- Departamento de Fisioterapia, Universidade Federal dos Vales do Jequitinhonha e Mucuri/UFVJM, Diamantina, MG, Brasil
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Foo YH, Tunku Ahmad Yahaya TS, Chung TY, Silvanathan JP. Photobiomodulation After Neurotization (Oberlin Procedure) in Brachial Plexus Injury: A Randomized Control Trial. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2020; 38:215-221. [PMID: 32301668 DOI: 10.1089/photob.2019.4757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Objective: To investigate effect of photobiomodulation (PBM) on nerve regeneration after neurotization with the Oberlin Procedure (ulnar fascicle to motor branch to biceps) to restore elbow flexion in patients with brachial plexus injury. Materials and methods: This prospective randomized controlled trial was conducted with 14 patients with high brachial plexus injury who underwent neurotization with the Oberlin Procedure to restore elbow flexion. The patients were randomly allocated to two groups of equal numbers: control group and PBM group. In this study, the PBM used has a wavelength of 808 nm, 50 mW power, continuous mode emission, 4 J/cm2 dosimetry, administered daily for 10 consecutive days, with an interval of 2 days (weekends). The outcome of surgery was assessed after 1, 2, 3, and 6 months. The nonparametric Mann-Whitney U-test and chi-square test were utilized to compare the results between both groups. Results: After 3 months postoperatively, more patients in the PBM group had demonstrated signs of reinnervation and the mean muscle power was significantly higher in the PBM group. No adverse effects resulted from the administration of PBM. Conclusions: PBM is a treatment modality that can improve nerve regeneration after neurotization with the Oberlin Procedure.
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Affiliation(s)
- Yi Hui Foo
- Department of Orthopaedics and University of Malaya, Medical Centre, Kuala Lumpur, Malaysia
| | | | - Tze Yang Chung
- Department of Rehabilitation Medicine, University of Malaya, Medical Centre, Kuala Lumpur, Malaysia
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Alayat MSM, Basalamah MA, Elbarrany WGEAE, El-Sawy NAM, Abdel-Kafy EM, El-Fiky AAR. Dose-dependent effect of the pulsed Nd:YAG laser in the treatment of crushed sciatic nerve in Wister rats: an experimental model. Lasers Med Sci 2020; 35:1989-1998. [PMID: 32193821 DOI: 10.1007/s10103-020-02999-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/09/2020] [Indexed: 12/21/2022]
Abstract
The objective of the study was to investigate the efficacy of three energy densities 4, 10, and 50 J/cm2 of pulsed Nd:YAG laser for the treatment of crushed sciatic nerve in Wister rats by evaluating changes in the sciatic functional index and the electrophysiology.A total of 180 Wistar rats were involved in the study. Rats were randomly assigned to five groups. Rats were subjected to the sciatic nerve crushing. Control negative (CONT-ve), which received no crushing; control positive (CONT+ve), which received crushing with no laser; and HILT-4, HILT-10, and HILT-50 groups, which received pulsed Nd:YAG laser (10 Hz, 360 mJ/cm2) with energy densities 4, 10, and 50 J/cm2, respectively. The SFI, the amilitude of compound motor action potential (CMAP) and sciatic motor nerve conduction velocity (MNCV) were measured before and after seven, 14, and 21 days after crushing. For the SFI and electrophysiological analysis, repeated measures ANOVA is used, followed by Bonferroni's repeated-measures test. Statistical significance was set at p < 0.05. After one week, there was no significant difference in SFI, CMAP, and MNCV among the three laser groups with significant changes between them and CONT-ve and CONT+ve groups. There was a significant increase in either CMAP amplitude or MNCV after 14 days with significant decrease in the SFI after 21 days among all treatment groups. The pulsed Nd:YAG laser applied with energy densities 4, 10, and 50 J/cm2 significantly decreased the SFI and increased the CMAP and MNCV of the crushed sciatic nerve in Wister rats. Among laser doses, the difference in the rate of recovery in the electrophysiology was found after two weeks while in the SFI after three weeks. The improvement after the nerve injury was time and dose dependent.
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Affiliation(s)
| | | | | | | | - Ehab Mohamed Abdel-Kafy
- Physical Therapy Department, Faculty of Applied Medical Science, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Amir Abdel-Raouf El-Fiky
- Physical Therapy Department, Faculty of Applied Medical Science, Umm Al-Qura University, Mecca, Saudi Arabia
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Svobodova B, Kloudova A, Ruzicka J, Kajtmanova L, Navratil L, Sedlacek R, Suchy T, Jhanwar-Uniyal M, Jendelova P, Machova Urdzikova L. The effect of 808 nm and 905 nm wavelength light on recovery after spinal cord injury. Sci Rep 2019; 9:7660. [PMID: 31113985 PMCID: PMC6529518 DOI: 10.1038/s41598-019-44141-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 05/08/2019] [Indexed: 01/01/2023] Open
Abstract
We investigated the effect of a Multiwave Locked System laser (with a simultaneous 808 nm continuous emission and 905 nm pulse emission) on the spinal cord after spinal cord injury (SCI) in rats. The functional recovery was measured by locomotor tests (BBB, Beam walking, MotoRater) and a sensitivity test (Plantar test). The locomotor tests showed a significant improvement of the locomotor functions of the rats after laser treatment from the first week following lesioning, compared to the controls. The laser treatment significantly diminished thermal hyperalgesia after SCI as measured by the Plantar test. The atrophy of the soleus muscle was reduced in the laser treated rats. The histopathological investigation showed a positive effect of the laser therapy on white and gray matter sparing. Our data suggests an upregulation of M2 macrophages in laser treated animals by the increasing number of double labeled CD68+/CD206+ cells in the cranial and central parts of the lesion, compared to the control animals. A shift in microglial/macrophage polarization was confirmed by gene expression analysis by significant mRNA downregulation of Cd86 (marker of inflammatory M1), and non-significant upregulation of Arg1 (marker of M2). These results demonstrated that the combination of 808 nm and 905 nm wavelength light is a promising non-invasive therapy for improving functional recovery and tissue sparing after SCI.
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Affiliation(s)
- Barbora Svobodova
- Institute of Experimental Medicine, Academy of Sciences, Prague, Czech Republic.,2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Anna Kloudova
- Institute of Experimental Medicine, Academy of Sciences, Prague, Czech Republic
| | - Jiri Ruzicka
- Institute of Experimental Medicine, Academy of Sciences, Prague, Czech Republic
| | | | - Leos Navratil
- Department of Health Care Disciplines and Population Protection, Faculty of Biomedical Engineering, Czech Technical University, Kladno, Czech Republic
| | - Radek Sedlacek
- Laboratory of Biomechanics, Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Tomas Suchy
- Laboratory of Biomechanics, Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | | | - Pavla Jendelova
- Institute of Experimental Medicine, Academy of Sciences, Prague, Czech Republic. .,2nd Faculty of Medicine, Charles University, Prague, Czech Republic.
| | - Lucia Machova Urdzikova
- Institute of Experimental Medicine, Academy of Sciences, Prague, Czech Republic. .,2nd Faculty of Medicine, Charles University, Prague, Czech Republic.
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Sahar MSU, Barton M, Tansley GD. Bridging larger gaps in peripheral nerves using neural prosthetics and physical therapeutic agents. Neural Regen Res 2019; 14:1109-1115. [PMID: 30804232 PMCID: PMC6425823 DOI: 10.4103/1673-5374.251186] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Peripheral nerve injuries are relatively common and can be caused by a variety of traumatic events such as motor vehicle accidents. They can lead to long-term disability, pain, and financial burden, and contribute to poor quality of life. In this review, we systematically analyze the contemporary literature on peripheral nerve gap management using nerve prostheses in conjunction with physical therapeutic agents. The use of nerve prostheses to assist nerve regeneration across large gaps (> 30 mm) has revolutionized neural surgery. The materials used for nerve prostheses have been greatly refined, making them suitable for repairing large nerve gaps. However, research on peripheral nerve gap management using nerve prostheses reports inconsistent functional outcomes, especially when prostheses are integrated with physical therapeutic agents, and thus warrants careful investigation. This review explores the effectiveness of nerve prostheses for bridging large nerve gaps and then addresses their use in combination with physical therapeutic agents.
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Affiliation(s)
| | - Matthew Barton
- Clem Jones Centre for Neurobiology and Stem Cell Therapies, Griffith University, Gold Coast, Queensland, Australia
| | - Geoffrey Douglas Tansley
- School of Engineering and Built Environment, Griffith University, Gold Coast, Queensland, Australia
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Rosso MPDO, Buchaim DV, Kawano N, Furlanette G, Pomini KT, Buchaim RL. Photobiomodulation Therapy (PBMT) in Peripheral Nerve Regeneration: A Systematic Review. Bioengineering (Basel) 2018; 5:bioengineering5020044. [PMID: 29890728 PMCID: PMC6027218 DOI: 10.3390/bioengineering5020044] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 06/01/2018] [Accepted: 06/07/2018] [Indexed: 12/18/2022] Open
Abstract
Photobiomodulation therapy (PBMT) has been investigated because of its intimate relationship with tissue recovery processes, such as on peripheral nerve damage. Based on the wide range of benefits that the PBMT has shown and its clinical relevance, the aim of this research was to carry out a systematic review of the last 10 years, ascertaining the influence of the PBMT in the regeneration of injured peripheral nerves. The search was performed in the PubMed/MEDLINE database with the combination of the keywords: low-level laser therapy AND nerve regeneration. Initially, 54 articles were obtained, 26 articles of which were chosen for the study according to the inclusion criteria. In the qualitative aspect, it was observed that PBMT was able to accelerate the process of nerve regeneration, presenting an increase in the number of myelinated fibers and a better lamellar organization of myelin sheath, besides improvement of electrophysiological function, immunoreactivity, high functionality rate, decrease of inflammation, pain, and the facilitation of neural regeneration, release of growth factors, increase of vascular network and collagen. It was concluded that PBMT has beneficial effects on the recovery of nerve lesions, especially when related to a faster regeneration and functional improvement, despite the variety of parameters.
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Affiliation(s)
- Marcelie Priscila de Oliveira Rosso
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Alameda Dr. Octávio Pinheiro Brisola 9-75, Vila Nova Cidade Universitária, Bauru, São Paulo CEP 17012-901, Brazil.
| | - Daniela Vieira Buchaim
- Medical School, Discipline of Human Morphophysiology, University of Marilia (UNIMAR), Av. Higino Muzi Filho, 1001 Campus Universitário, Jardim Araxa, Marília, São Paulo CEP 17525-902, Brazil.
- Medical School, Discipline of Neuroanatomy, University Center of Adamantina (UNIFAI), Rua Nove de Julho, 730, Centro, Adamantina, São Paulo CEP 17800-000, Brazil.
| | - Natália Kawano
- Medical School, Discipline of Human Morphophysiology, University of Marilia (UNIMAR), Av. Higino Muzi Filho, 1001 Campus Universitário, Jardim Araxa, Marília, São Paulo CEP 17525-902, Brazil.
| | - Gabriela Furlanette
- Medical School, Discipline of Human Morphophysiology, University of Marilia (UNIMAR), Av. Higino Muzi Filho, 1001 Campus Universitário, Jardim Araxa, Marília, São Paulo CEP 17525-902, Brazil.
| | - Karina Torres Pomini
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Alameda Dr. Octávio Pinheiro Brisola 9-75, Vila Nova Cidade Universitária, Bauru, São Paulo CEP 17012-901, Brazil.
| | - Rogério Leone Buchaim
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Alameda Dr. Octávio Pinheiro Brisola 9-75, Vila Nova Cidade Universitária, Bauru, São Paulo CEP 17012-901, Brazil.
- Medical School, Discipline of Human Morphophysiology, University of Marilia (UNIMAR), Av. Higino Muzi Filho, 1001 Campus Universitário, Jardim Araxa, Marília, São Paulo CEP 17525-902, Brazil.
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Effects of photobiomodulation on experimental models of peripheral nerve injury. Lasers Med Sci 2017; 32:2155-2165. [DOI: 10.1007/s10103-017-2359-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 10/10/2017] [Indexed: 10/18/2022]
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11
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Clinical effectiveness of low-level laser treatment on peripheral somatosensory neuropathy. Lasers Med Sci 2017; 32:721-728. [DOI: 10.1007/s10103-016-2137-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 12/26/2016] [Indexed: 12/12/2022]
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Ziago EKM, Fazan VPS, Iyomasa MM, Sousa LG, Yamauchi PY, da Silva EA, Borie E, Fuentes R, Dias FJ. Analysis of the variation in low-level laser energy density on the crushed sciatic nerves of rats: a morphological, quantitative, and morphometric study. Lasers Med Sci 2017; 32:369-378. [PMID: 28063018 DOI: 10.1007/s10103-016-2126-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 12/06/2016] [Indexed: 01/17/2023]
Abstract
The objective of this study was to evaluate three energy densities of low-level laser therapy (LLLT, GaAlAs, 780 nm, 40 mW, 0.04 cm2) for the treatment of lesions to peripheral nerves using the sciatic nerve of rats injured via crushing model (15 kgf, 5.2 MPa). Thirty Wistar rats (♂, 200-250 g) were divided into five groups (n = 6): C-control, not injured, and irradiated; L0-injured nerve without irradiation; L4-injured nerve irradiated with LLLT 4 J/cm2 (0.16 J); L10-injured nerve irradiated with LLLT 10 J/cm2 (0.4 J); and L50-injured nerve irradiated with LLLT 50 J/cm2 (2 J). The animals were sacrificed 2 weeks after the injury via perfusion with glutaraldehyde (2.5%, 0.1 M sodium cacodylate buffer). The nerve tissue was embedded in historesin, cut (3 μm), mounted on slides, and stained (Sudan black and neutral red). The morphological and quantitative analysis (myelin and blood capillary densities) and morphometric parameters (maximum and minimum diameters of nerve fibers, axon diameter, G-ratio, myelin sheath thickness) were assessed using the ImageJ software. ANOVA (parametric) or Kruskal-Wallis (nonparametric) tests were used for the statistical analysis. Groups L0, L4, L10, and L50 exhibited diminished values of all the quantitative and morphometric parameters in comparison to the control group. The morphological, quantitative, and morphometric data revealed improvement after injury in groups L4, L10, and L50 (irradiated groups) compared to the injured-only group (L0); the best results, in general, were observed for the L10 group after 15 days of nerve injury.
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Affiliation(s)
| | | | | | - Luiz Gustavo Sousa
- School of Dentistry, University of São Paulo, USP, Ribeirão Preto, Brazil
| | | | | | - Eduardo Borie
- Department of Integral Dentistry, CICO - Research Centre in Dental Sciences, Dental School, Universidad de La Frontera, Temuco, Chile
| | - Ramón Fuentes
- Department of Integral Dentistry, CICO - Research Centre in Dental Sciences, Dental School, Universidad de La Frontera, Temuco, Chile
| | - Fernando José Dias
- School of Medicine, University of São Paulo, USP, Ribeirão Preto, Brazil. .,Department of Integral Dentistry, CICO - Research Centre in Dental Sciences, Dental School, Universidad de La Frontera, Temuco, Chile.
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de Oliveira RF, da Silva AC, Simões A, Youssef MN, de Freitas PM. Laser Therapy in the Treatment of Paresthesia: A Retrospective Study of 125 Clinical Cases. Photomed Laser Surg 2016. [PMID: 26226172 DOI: 10.1089/pho.2015.3888] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE The aim of this retrospective study was to evaluate the effectiveness of laser therapy for acceleration and recovery of nerve sensitivity after orthognathic or minor oral surgeries, by analysis of clinical records of patients treated at the Special Laboratory of Lasers in Dentistry (LELO, School of Dentistry, University of São Paulo), throughout the period 2007-2013. BACKGROUND DATA Nerve tissue lesions may occur during various dental and routine surgical procedures, resulting in paresthesia. Laser therapy has been shown to be able to accelerate and enhance the regeneration of the affected nerve tissue; however, there are few studies in the literature that evaluate the effects of treatment with low-power laser on neural changes after orthognathic or minor oral surgeries. METHODS A total of 125 clinical records were included, and the data on gender, age, origin of the lesion, nerve, interval between surgery and onset of laser therapy, frequency of laser irradiation (one or two times per week), final evolution, and if there was a need to change the irradiation protocol, were all recorded. These data were related to the recovery of sensitivity in the affected nerve area. Descriptive analyses and modeling for analysis of categorical data (α=5%) were performed. RESULTS The results from both analyses showed that the recovery of sensitivity was correlated with patient age (p=0.015) and interval between surgery and onset of laser therapy (p=0.002). CONCLUSIONS Within the limits of this retrospective study, it was found that low- power laser therapy with beam emission band in the infrared spectrum (808 nm) can positively affect the recovery of sensitivity after orthognathic or minor oral surgeries.
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Affiliation(s)
- Renata Ferreira de Oliveira
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Alessandro Costa da Silva
- 2 Private Practice, Interclin Clínica de Cirurgia e Traumatologia Buco-Maxilo-Faciais , São Paulo, SP, Brazil
| | - Alyne Simões
- 3 Oral Biology Research Center, Biomaterials and Oral Biochemistry Department, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Michel Nicolau Youssef
- 4 Universidade Cruzeiro do Sul, São Paulo, SP, Brazil/ Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Patrícia Moreira de Freitas
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
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Barbosa RI, Fonseca MDCR, Rodrigues EKDS, Tamanini G, Marcolino AM, Mazzer N, Guirro RRDJ, MacDermid J. Efficacy of low-level laser therapy associated to orthoses for patients with carpal tunnel syndrome: A randomized single-blinded controlled trial. J Back Musculoskelet Rehabil 2016; 29:459-66. [PMID: 26444330 DOI: 10.3233/bmr-150640] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Compare the efficacy of orthoses and patient education with and without the addition to Low-Level Laser Therapy (LLLT - 660 nm, 30 mW, a continuous regime and bean area of 0.06 cm2). The laser irradiation was delivered with the fluency of 10J/cm2 in patients with mild and moderate Carpal Tunnel Syndrome (CTS). METHODS 48 patients were randomized and 30 finished the protocol (a sample loss of 37.5%), 90% female and 10% males. Randomization was applied to allocate the patients in each one of the groups, with association or not to LLLT (group orthoses or LLLT and orthoses). All of them were submitted to ergonomic home orientations. The short-term symptoms and function outcome were assessed through: Boston Carpal Tunnel Questionnaire (BCTQ) - Severity of Symptoms (SS) Functional Score (FS). Pain (VAS), Semmes-Weinstein monofilaments, 2PD and pinch strength was used for characterization of the sample. Most of the participants were women, over 4th decade enrolled on heavy hand duties occupations, right-handed, 66.7% affected on dominant hand, without alterations in sensory median nerve thresholds or pinch strength. RESULTS Both groups showed a reduction of total BCTQ score and its subdomains after six weeks, with significant difference (p< 0.05), comparing to baseline. No significant difference was found between groups. A Minimal clinical change was observed after the intervention in 92.3% of participants for BCTQ subdomain severity of symptoms at individual comparison for LLLT and orthoses group and 76.5% for the orthoses group, demonstrating clinical relevance. Effect size Cohen's index was moderate for the severity of symptoms. CONCLUSION LLLT in association to orthoses and ergonomic orientation seems to be effective in short-term symptoms relieve for patients with mild and moderate CTS.
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Affiliation(s)
- Rafael Inácio Barbosa
- Rehabilitation and Performance Program, University of São Paulo, Ribeirão Preto, Brazil.,Federal University of Santa Catarina, Araranguá, Brazil
| | - Marisa de Cássia Registro Fonseca
- Rehabilitation and Performance Program, University of São Paulo, Ribeirão Preto, Brazil.,Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Guilherme Tamanini
- Rehabilitation and Performance Program, University of São Paulo, Ribeirão Preto, Brazil
| | - Alexandre Marcio Marcolino
- Rehabilitation and Performance Program, University of São Paulo, Ribeirão Preto, Brazil.,Federal University of Santa Catarina, Araranguá, Brazil
| | - Nilton Mazzer
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, University of São Paulo, Ribeirão Preto, Brazil
| | - Rinaldo Roberto de Jesus Guirro
- Rehabilitation and Performance Program, University of São Paulo, Ribeirão Preto, Brazil.,Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, University of São Paulo, Ribeirão Preto, Brazil
| | - Joy MacDermid
- School of Rehabilitation Science, McMaster University, Hamilton, ON, Canada
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de Oliveira RF, de Freitas PM. Laser therapy on points of acupuncture on nerve repair. Neural Regen Res 2016; 11:557-8. [PMID: 27212909 PMCID: PMC4870905 DOI: 10.4103/1673-5374.180734] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Renata F de Oliveira
- Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP), São Paulo, SP, Brazil
| | - Patrícia M de Freitas
- Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP), São Paulo, SP, Brazil
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Takhtfooladi MA, Sharifi D. A comparative study of red and blue light-emitting diodes and low-level laser in regeneration of the transected sciatic nerve after an end to end neurorrhaphy in rabbits. Lasers Med Sci 2015; 30:2319-24. [PMID: 26415928 DOI: 10.1007/s10103-015-1813-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 09/21/2015] [Indexed: 01/22/2023]
Abstract
This study aimed at evaluating the effects of red and blue light-emitting diodes (LED) and low-level laser (LLL) on the regeneration of the transected sciatic nerve after an end-to-end neurorrhaphy in rabbits. Forty healthy mature male New Zealand rabbits were randomly assigned into four experimental groups: control, LLL (680 nm), red LED (650 nm), and blue LED (450 nm). All animals underwent the right sciatic nerve neurotmesis injury under general anesthesia and end-to-end anastomosis. The phototherapy was initiated on the first postoperative day and lasted for 14 consecutive days at the same time of the day. On the 30th day post-surgery, the animals whose sciatic nerves were harvested for histopathological analysis were euthanized. The nerves were analyzed and quantified the following findings: Schwann cells, large myelinic axons, and neurons. In the LLL group, as compared to other groups, an increase in the number of all analyzed aspects was observed with significance level (P < 0.05). This finding suggests that postoperative LLL irradiation was able to accelerate and potentialize the peripheral nerve regeneration process in rabbits within 14 days of irradiation.
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Affiliation(s)
| | - Davood Sharifi
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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Takhtfooladi MA, Jahanbakhsh F, Takhtfooladi HA, Yousefi K, Allahverdi A. Effect of low-level laser therapy (685 nm, 3 J/cm(2)) on functional recovery of the sciatic nerve in rats following crushing lesion. Lasers Med Sci 2015; 30:1047-52. [PMID: 25595127 DOI: 10.1007/s10103-015-1709-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 01/05/2015] [Indexed: 11/30/2022]
Abstract
Previous studies have shown that low-level laser therapy (LLLT) promotes posttraumatic nerve regeneration. The objective of the present study was to assess the efficacy of 685-nm LLLT at the dosage of 3 J/cm(2) in the functional recovery of the sciatic nerve in rats following crushing injury. The left sciatic nerves of 20 male Wistar rats were subjected to controlled crush injury by a hemostatic tweezers, and the rats were randomly allocated into two experimental groups as follows: control group and laser group. Laser irradiation (685 nm wavelength; 15 mW, CW, 3 J/cm(2), spot of 0.028 cm(2)) was started on the postsurgical first day, above the site of injury, and was continued for 21 consecutive days. Functional recovery was evaluated at 3 weeks postoperatively by measuring the sciatic functional index (SFI) and sciatic static index (SSI) at weekly intervals. The treated rats showed improvement in motion pattern. The SFI and SSI results were significant when comparing two groups on the 14th and 21st postoperative days (p < 0.05). There were intra-group differences detected in laser group in different periods (p < 0.05). Low-level laser irradiation, with the parameters used in the present study, accelerated and improved sciatic nerve function in rats after crushing injury.
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18
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“Low-intensity laser therapy effect on the recovery of traumatic spinal cord injury”. Lasers Med Sci 2014; 29:1849-59. [DOI: 10.1007/s10103-014-1586-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 04/17/2014] [Indexed: 01/17/2023]
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19
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Masoumipoor M, Jameie SB, Janzadeh A, Nasirinezhad F, Soleimani M, Kerdary M. Effects of 660- and 980-nm low-level laser therapy on neuropathic pain relief following chronic constriction injury in rat sciatic nerve. Lasers Med Sci 2014; 29:1593-8. [DOI: 10.1007/s10103-014-1552-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Accepted: 02/18/2014] [Indexed: 01/05/2023]
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20
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Benefits of laser phototherapy on nerve repair. Lasers Med Sci 2014; 30:1395-406. [DOI: 10.1007/s10103-014-1531-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 01/20/2014] [Indexed: 10/25/2022]
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21
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Sene GAL, Sousa FFDA, Fazan VS, Barbieri CH. Effects of laser therapy in peripheral nerve regeneration. ACTA ORTOPEDICA BRASILEIRA 2014; 21:266-70. [PMID: 24453680 PMCID: PMC3874995 DOI: 10.1590/s1413-78522013000500005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 02/05/2013] [Indexed: 11/22/2022]
Abstract
OBJECTIVE: The influence of dose of low power lasertherapy (AsGaAl, 830 nm) on the regeneration of the fibular nerve of rats after a crush injury was evaluated by means of the functional gait analysis and histomorphometric parameters. METHODS: Controlled crush injury of the right common fibular nerve, immediately followed by increasing doses (G1: no irradiation; G2: simulated; G3: 5 J/cm2; G4: 10 J/cm2; G5: 20 J/cm2) laser irradiation directly on the lesion site for 21 consecutive days. Functional gait analysis was carried out at weekly intervals by measuring the peroneal/fibular functional index (PFI). The animals were killed on the 21st postoperative day for removal of the fibular nerve, which was prepared for the histomorphometric analysis. RESULTS: The PFI progressively increased during the observation period in all groups, without significant differences between them (p>0.05). The transverse nerve area was significantly wider in group 2 than in groups 3 and 4, while fiber density was significantly greater in group 4 than in all remaining groups. CONCLUSION: The low power AsGaAl laser irradiation did not accelerate nerve recovery with any of the doses used. Level of Evidence I, Therapeutic Studies Investigating the Results of Treatment.
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Low-level laser stimulation on adipose-tissue-derived stem cell treatments for focal cerebral ischemia in rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:594906. [PMID: 24363769 PMCID: PMC3865741 DOI: 10.1155/2013/594906] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 11/09/2013] [Accepted: 11/10/2013] [Indexed: 11/24/2022]
Abstract
This study investigated the effects of large-area irradiation from a low-level laser on the proliferation and differentiation of i-ADSCs in neuronal cells. MTT assays indicated no significant difference between the amount of cells with (LS+) and without (LS−) laser treatment (P > 0.05). However, immunofluorescent staining and western blot analysis results indicated a significant increase in the neural stem-cell marker, nestin, following exposure to low-level laser irradiation (P < 0.05). Furthermore, stem cell implantation was applied to treat rats suffering from stroke. At 28 days posttreatment, the motor functions of the rats treated using i-ADSCs (LS+) did not differ greatly from those in the sham group and HE-stained brain tissue samples exhibited near-complete recovery with nearly no brain tissue damage. However, the motor functions of the rats treated using i-ADSCs (LS−) remained somewhat dysfunctional and tissue displayed necrotic scarring and voids. The western blot analysis also revealed significant expression of oligo-2 in the rats treated using i-ADSCs (LS+) as well as in the sham group (P < 0.05). The results demonstrated that low-level laser irradiation exerts a positive effect on the differentiation of i-ADSCs and can be employed to treat rats suffering from ischemic stroke to regain motor functions.
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Casalechi HL, de Farias Marques AC, da Silva EAP, Aimbire F, Marcos RL, Lopes-Martins RAB, de Carvalho PDTC, Albertini R. Analysis of the effect of phototherapy in model with traumatic Achilles tendon injury in rats. Lasers Med Sci 2013; 29:1075-81. [DOI: 10.1007/s10103-013-1468-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 10/13/2013] [Indexed: 01/17/2023]
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Effects of 660 nm Low Level Laser Therapy on Neuropathic Pain Relief Following Chronic Constriction Injury in Rat Sciatic Nerve. ARCHIVES OF NEUROSCIENCE 2013. [DOI: 10.5812/archneurosci.13740] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Akgul T, Gulsoy M, Gulcur HO. Effects of early and delayed laser application on nerve regeneration. Lasers Med Sci 2013; 29:351-7. [PMID: 23715785 DOI: 10.1007/s10103-013-1355-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 05/17/2013] [Indexed: 10/26/2022]
Abstract
The aim of this study is to analyze the differences between early and delayed use of low-level laser therapy (LLLT) in functional and morphological recovery of the peripheral nerve. Thirty male Wistar rats were divided into three groups after the sciatic nerve was crushed: (1) control group without laser treatment, (2) early group with laser treatment started immediately after surgery and lasted 14 days, and (3) delayed group with laser treatment starting on the postoperative day 7 and lasted until day 21. A 650-nm diode laser (model: DH650-24-3(5), Huanic, China) with an output power of 25 mW exposed transcutaneously at three equidistant points on the surgical mark corresponding to the crushed nerve. The length of the laser application was calculated as 57 s to satisfy approximately 10 J/cm(2). A Sciatic Functional Index (SFI) was used to evaluate functional improvement in groups at pre- and post-surgery (on days 7, 14, and 21). Compound action potential (CAP) was measured after the sacrifice and histological examination was performed for all groups. SFI results showed that there was no significant difference between groups at different days (p > 0.05). On the other hand, the latency of CAP decreased significantly (p < 0.05) in the delayed group. Histological examination confirmed that the number of mononuclear cells was lower (p < 0.05) in both early and delayed groups. In conclusion, results supported the hypothesis that LLLT could accelerate the rate of recovery of injured peripheral nerves in this animal model. Though both laser groups had positive outcomes, delayed group showed better recovery.
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Affiliation(s)
- Tuba Akgul
- Institute of Biomedical Engineering, Bogazici University, Kandilli Kampus, Cengelkoy, 34684, Istanbul, Turkey
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de Vasconcellos LMR, Barbara MAM, Deco CP, Junqueira JC, do Prado RF, Anbinder AL, de Vasconcellos LGO, Cairo CAA, Carvalho YR. Healing of normal and osteopenic bone with titanium implant and low-level laser therapy (GaAlAs): a histomorphometric study in rats. Lasers Med Sci 2013; 29:575-80. [DOI: 10.1007/s10103-013-1326-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 04/15/2013] [Indexed: 12/13/2022]
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Marcolino AM, Barbosa RI, das Neves LMS, Mazzer N, de Jesus Guirro RR, de Cássia Registro Fonseca M. Assessment of functional recovery of sciatic nerve in rats submitted to low-level laser therapy with different fluences. An experimental study: laser in functional recovery in rats. J Hand Microsurg 2013; 5:49-53. [PMID: 24426674 DOI: 10.1007/s12593-013-0096-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 04/01/2013] [Indexed: 10/26/2022] Open
Abstract
Peripheral nerve lesions caused sensory and motor deficits along the distribution of the injured nerve. Numerous researches have been carried out to enhance and/or accelerate the recovery of such lesions. The objective of this study was to assess the functional recovery of sciatic nerve in rats subjected to different fluences of low-level laser therapy (LLLT). Thirty-six animals were randomly divided into four groups: one consisting of sham rats and three others irradiated with progressive fluencies of 10 J/cm(2), 40 J/cm(2) and 80 J/cm(2) of laser AsGaAl (830 nm) for 21 consecutive days. They were evaluated by the Sciatic Functional Index (SFI) method. The crush injury was performed by using a portable device with dead weight of 5,000 g whose load was applied for 10 min. A digital camera was used to record the footprints left on the acrylic track, before surgery and after, on the 7th, 14th, and 21st days. The results also showed that on the 7th day, there was a difference between the groups irradiated with 40 J/cm(2), when compared with the sham group (p < 0.05). On the 14th day the groups irradiated with 40 J/cm(2) and 80 J/cm(2) also presented better results when compared with sham, however, on the 21st day, no inter-group difference was found (p > 0.05). It was possible to observe that the LLLT at fluency of 40 J/cm(2) and 80 J/cm(2) had a positive influence on the acceleration of the functional nerve recovery.
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Affiliation(s)
- Alexandre Marcio Marcolino
- Post-Graduation Progamme Rehabilitation and Functional Performance, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil ; Departamento de Biomecânica, Medicina e Reabilitação do Aparelho Locomotor, FMRP-USP, Av; Bandeirantes, 3900, CEP 14049-900 Ribeirão Preto, SP Brazil
| | - Rafael Inácio Barbosa
- Post-Graduation Progamme Rehabilitation and Functional Performance, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Lais Mara Siqueira das Neves
- Post-Graduation Progamme Rehabilitation and Functional Performance, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Nilton Mazzer
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Rinaldo Roberto de Jesus Guirro
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Marisa de Cássia Registro Fonseca
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
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Barbosa RI, da Silva Rodrigues EK, Tamanini G, Marcolino AM, Elui VMC, de Jesus Guirro RR, Mazzer N, de Cássia Registro Fonseca M. Effectiveness of low-level laser therapy for patients with carpal tunnel syndrome: design of a randomized single-blinded controlled trial. BMC Musculoskelet Disord 2012; 13:248. [PMID: 23237204 PMCID: PMC3552983 DOI: 10.1186/1471-2474-13-248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 12/06/2012] [Indexed: 11/16/2022] Open
Abstract
Background Carpal tunnel syndrome is the most common neuropathy in the upper extremity, resulting from the compression of the median nerve at wrist level. Clinical studies are essentials to present evidence on therapeutic resources use at early restoration on peripheral nerve functionality. Low-level laser therapy has been widely investigated in researches related to nerve regeneration. Therefore, it is suggested that the effect of low-level laser therapy associated with other conservative rehabilitation techniques may positively affect symptoms and overall hand function in compressive neuropathies such as carpal tunnel syndrome. The aim of this study is to evaluate the effectiveness of low-level laser therapy in addition to orthoses therapy and home orientations in patients with carpal tunnel syndrome. Methods/Design Patients older than 18 years old will be included, with clinical diagnosis of carpal tunnel syndrome, excluding comorbidies. A physiotherapist will conduct intervention, with a blinding evaluator. Randomization will be applied to allocate the patients in each group: with association or not to low-level laser therapy. All of them will be submitted to orthoses therapy and home orientations. Outcome will be assessed through: pain visual analogic scale, Semmes Weinstein monofilaments™ threshold sensibility test, Pinch Gauge™, Boston Carpal Tunnel Questionnaire and two point discrimination test. Discussion This paper describes the design of a randomized controlled trial, which aim to assess the effectiveness of conservative treatment added to low-level laser therapy for patients with carpal tunnel syndrome. Trial registration Brazilian Clinical Trials Registry (ReBec) - 75ddtf / Universal Trial Number: U1111-1121-5184
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Affiliation(s)
- Rafael Inácio Barbosa
- Rehabilitation and Functional Performance Program, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes, 3900 Ribeirão Preto, SP CEP 14049-900, Brasil.
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Moges H, Wu X, McCoy J, Vasconcelos OM, Bryant H, Grunberg NE, Anders JJ. Effect of 810 nm light on nerve regeneration after autograft repair of severely injured rat median nerve. Lasers Surg Med 2011; 43:901-6. [DOI: 10.1002/lsm.21117] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Functional and morphometric differences between the early and delayed use of phototherapy in crushed median nerves of rats. Lasers Med Sci 2011; 27:479-86. [DOI: 10.1007/s10103-011-0972-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2011] [Accepted: 07/14/2011] [Indexed: 10/17/2022]
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Noorafshan A, Omidi A, Karbalay-Doust S, Aliabadi E, Dehghani F. Effects of curcumin on the dorsal root ganglion structure and functional recovery after sciatic nerve crush in rat. Micron 2011; 42:449-55. [DOI: 10.1016/j.micron.2011.01.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2010] [Revised: 01/10/2011] [Accepted: 01/11/2011] [Indexed: 10/18/2022]
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Câmara CNDS, Brito MVH, Silveira EL, Silva DSGD, Simões VRF, Pontes RWF. Histological analysis of low-intensity laser therapy effects in peripheral nerve regeneration in Wistar rats. Acta Cir Bras 2011; 26:12-8. [DOI: 10.1590/s0102-86502011000100004] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Accepted: 10/19/2010] [Indexed: 11/21/2022] Open
Abstract
Purpose: Analyze the influence of low-intensity laser therapy in the sciatic nerve regeneration of rats submitted to controlled crush through histological analysis. Methods: Were used 20 Wistar rats, to analyze the influence of low-intensity laser therapy in the sciatic nerve regeneration, where the injury of the type axonotmesis was induced by a haemostatic clamp Crile (2nd level of the rack). The animals were randomly distributed in 2 groups. Control group (CG n = 10) and Laser group (LG n = 10). These were subdivided in 2 subgroups each, according to the euthanasia period: (CG14 _ n = 5 and CG21 _ n = 5) and (LG14 _ n = 5 and LG21 _ n = 5). At the end of treatment, the samples were removed and prepared for histological analysis, where were analyzed and quantified the following findings: Schwann cells, myelinic axons with large diameter and neurons. Results: In the groups submitted to low-intensity laser therapy, were observed an increase in the number of all analyzed aspects with significance level. Conclusion: The irradiation with low intensity laser (904nm) influenced positively the regeneration of the sciatic nerve in Wistar rats after being injured by crush (axonotmesis), becoming the nerve recovery more rapid and efficient.
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Comparative effects of wavelengths of low-power laser in regeneration of sciatic nerve in rats following crushing lesion. Lasers Med Sci 2010; 25:423-30. [PMID: 20135336 DOI: 10.1007/s10103-009-0750-8] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Accepted: 11/30/2009] [Indexed: 10/19/2022]
Abstract
Peripheral nerves are structures that, when damaged, can result in significant motor and sensory disabilities. Several studies have used therapeutic resources with the aim of promoting early nerve regeneration, such as the use of low-power laser. However, this laser therapy does not represent a consensus regarding the methodology, thus yielding controversial conclusions. The objective of our study was to investigate, by functional evaluation, the comparative effects of low-power laser (660 nm and 830 nm) on sciatic nerve regeneration following crushing injuries. Twenty-seven Wistar rats subjected to sciatic nerve injury were divided into three groups: group sham, consisting of rats undergoing simulated irradiation; a group consisting of rats subjected to gallium-aluminum-arsenide (GaAlAs) laser at 660 nm (10 J/cm(2), 30 mW and 0.06 cm(2) beam), and another one consisting of rats subjected to GaAlAs laser at 830 nm (10 J/cm(2), 30 mW and 0.116 cm(2)). Laser was applied to the lesion for 21 days. A sciatic functional index (SFI) was used for functional evaluation prior to surgery and on days 7, 14, and 21 after surgery. Differences in SFI were found between group 660 nm and the other ones at the 14th day. One can observe that laser application at 660 nm with the parameters and methods utilised was effective in promoting early functional recovery, as indicated by the SFI, over the period evaluated.
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Marcolino AM, Barbosa RI, Neves LMSD, Vinas TS, Duarte DTDB, Mazzer N, Fonseca MDCR. Laser de baixa intensidade (830 nm) na recuperação funcional do nervo isquiático de ratos. ACTA ORTOPEDICA BRASILEIRA 2010. [DOI: 10.1590/s1413-78522010000400007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJETIVO: Avaliar o efeito do laser de baixa intensidade na melhora funcional da marcha de ratos após esmagamento do nervo ciático. MÉTODOS: Foram utilizados 18 ratos divididos alea-to-riamente em dois grupos: controle (sham) e irradiado com densidade de energia de 40J/cm², em 21 dias consecutivos, utilizando o laser 830nm (AsGaAl). Os animais foram submetidos ao esmagamento do nervo ciático direito com o dispositivo portátil de peso morto e avaliados pelo "Índice Funcional do Ciático" (IFC). As pegadas foram coletadas no pré-operatório, 7º, 14º e 21º dias pós-operatório. RESULTADOS: Os resultados do IFC foram significantes quando comparados os grupos no 7º e 14º dia pós-operatório (p<0,05). No 21º dia pós-operatório não houve diferença entre os grupos. Na avaliação intra-grupos houve diferença entre todas as semanas avaliadas (p<0,01). Os animais irradiados apresentaram melhora no padrão da marcha, demonstrada pelos valores do IFC nos períodos iniciais, mas ao final das 3 semanas, houve uma recuperação similar. CONCLUSÃO: A laserterapia de baixa intensidade mostrou ser eficaz no estímulo da aceleração da regeneração nervosa do ciático de ratos após esmagamento.
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