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Effects of Low-Level Laser Therapy in Autism Spectrum Disorder. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1116:111-130. [PMID: 29956199 DOI: 10.1007/5584_2018_234] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The study examined the efficacy of low-level laser therapy, a form of photobiomodulation, for the treatment of irritability associated with autistic spectrum disorder in children and adolescents aged 5-17 years. Twenty-one of the 40 participants received eight 5-min procedures administered to the base of the skull and temporal areas across a 4-week period (test, i.e., active treatment participants). All the participants were evaluated with the Aberrant Behavior Checklist (ABC), with the global scale and five subscales (irritability/agitation, lethargy/social withdrawal, stereotypic behavior, hyperactivity/noncompliance, and inappropriate speech), and the Clinical Global Impressions (CGI) Scale including a severity-of-illness scale (CGI-S) and a global improvement/change scale (CGI-C). The evaluation took place at baseline, week 2 (interim), week 4 (endpoint), and week 8 (post-procedure) of the study. The adjusted mean difference in the baseline to study endpoint change in the ABC irritability subscale score between test and placebo participants was -15.17 in favor of the test procedure group. ANCOVA analysis found this difference to be statistically significant (F = 99.34, p < 0.0001) compared to the baseline ABC irritability subscale score. The study found that low-level laser therapy could be an effective tool for reducing irritability and other symptoms and behaviors associated with the autistic spectrum disorder in children and adolescents, with positive changes maintained and augmented over time.
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152
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Praveen R, Thakur S, Kirthiga M, Narmatha M. Comparative evaluation of a low-level laser and topical desensitizing agent for treating dentinal hypersensitivity: A randomized controlled trial. J Conserv Dent 2018; 21:495-499. [PMID: 30294109 PMCID: PMC6161530 DOI: 10.4103/jcd.jcd_197_18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Aim The aim of this randomized, controlled, double-blinded, clinical study is to evaluate and compare the clinical effectiveness of low-level diode GaAlAs laser and glutaraldehyde-based topical desensitizing agent on cervical dentin hypersensitivity with the help of visual analog scale (VAS). Materials and Methods Fifty teeth of patients aged between 20 and 50 years were included, and VAS was used to assess the dentin hypersensitivity. The teeth were randomly allocated to either Group 1 or 2 using flip coin technique. Group 1 received glutaraldehyde desensitizer and Group 2 received 905 nm low-level laser. The sensitivity scores were recorded, immediately, after1 week and 3 months after therapy. Data was analyzed using Mann-Whitney U test for intergroup comparison and Friedman's test for intragroup comparison. Results There was a significant reduction in pain in both the groups at 3 months evaluation (P = 0.001).However, Group 2 showed a significant decrease in mean VAS scores when compared with Group 1 at both the one week and three month follow ups (P = 0.04, P = 0.03, respectively). Conclusion Although topical desensitizer and Low Level Laser are both effective in reducing dentinal hypersensitivity, Low Level Lasers are comparatively more effective at the studied time intervals.
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Affiliation(s)
- R Praveen
- Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Sciences and Hospital, Puducherry, India
| | - Sophia Thakur
- Department of Conservative Dentistry and Endodontics, Bapuji Dental College and Hospital, Davangere, Karnataka, India
| | - M Kirthiga
- Department of Pedodontic and Preventive Dentistry, Indira Gandhi Institute of Dental Sciences and Hospital, Puducherry, India
| | - M Narmatha
- Department of Pedodontic and Preventive Dentistry, Indira Gandhi Institute of Dental Sciences and Hospital, Puducherry, India
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153
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Shanks S, Leisman G. Perspective on Broad-Acting Clinical Physiological Effects of Photobiomodulation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1096:41-52. [PMID: 29572678 DOI: 10.1007/5584_2018_188] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Research into photobiomodulation reveals beneficial effects of light therapy for a rapidly expanding list of medical conditions and illnesses. Although it has become more widely accepted by the mainstream medicine, the effects and mechanisms of action appear to be poorly understood. The therapeutic benefits of photobiomodulation using low-energy red lasers extend far beyond superficial applications, with a well-described physics allowing an understanding of how red lasers of certain optimum intensities may cross the cranium. We now have a model for explaining potential therapeusis for applications in functional neurology that include stroke, traumatic brain injury, and neurodegenerative conditions in addition to the currently approved functions in lipolysis, in onychomycosis treatment, and in pain management.
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Affiliation(s)
| | - Gerry Leisman
- Faculty of Health Sciences, University of Haifa, Haifa, Israel. .,National Institute for Brain & Rehabilitation Sciences, Nazareth, Israel.
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154
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Pereira FC, Parisi JR, Maglioni CB, Machado GB, Barragán-Iglesias P, Silva JRT, Silva ML. Antinociceptive effects of low-level laser therapy at 3 and 8 j/cm2in a rat model of postoperative pain: possible role of endogenous Opioids. Lasers Surg Med 2017; 49:844-851. [DOI: 10.1002/lsm.22696] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/02/2017] [Indexed: 01/19/2023]
Affiliation(s)
- Fabio C. Pereira
- Department of Physiotherapy; College of Nursing of the Federal University of Alfenas-UNIFAL; Alfenas Brazil
| | - Julia R. Parisi
- Department of Physical Therapy; Federal University of São Carlos-UFSCar; São Carlos Brazil
| | - Caio B. Maglioni
- Department of Physiotherapy; College of Nursing of the Federal University of Alfenas-UNIFAL; Alfenas Brazil
| | - Gabriel B. Machado
- Department of Physiotherapy; College of Nursing of the Federal University of Alfenas-UNIFAL; Alfenas Brazil
| | | | - Josie R. T. Silva
- Department of Physiotherapy; College of Nursing of the Federal University of Alfenas-UNIFAL; Alfenas Brazil
| | - Marcelo L. Silva
- Department of Physiotherapy; College of Nursing of the Federal University of Alfenas-UNIFAL; Alfenas Brazil
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155
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Petrini M, Ferrante M, Trentini P, Perfetti G, Spoto G. Effect of pre-operatory low-level laser therapy on pain, swelling, and trismus associated with third-molar surgery. Med Oral Patol Oral Cir Bucal 2017; 22:e467-e472. [PMID: 28578368 PMCID: PMC5549519 DOI: 10.4317/medoral.21398] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 04/26/2017] [Indexed: 01/29/2023] Open
Abstract
Background The extraction of impacted third molars is commonly associated to pain, edema, trismus, limited jaw opening and movements. The aim of this retrospective study is to verify if pre-surgical low-level laser therapy (LLLT) associated with the extraction of impacted lower third molars could add benefits to the postoperative symptoms respect LLLT performed only after surgery. Material and Methods Data from 45 patients subjected to a surgical extraction of lower third molars were pooled and divided into three groups. Patients that received only routine management were inserted in the control group. Group 1, were patients that received LLLT immediately after surgery and at 24 hours. In group 2 were included patients treated with LLLT immediately before the extraction and immediately after the end of the procedure. Data were analyzed using linear regression and descriptive statistics. Results Both laser-treated groups were characterized by minor events of post-surgery complications of pain, edema, trismus. The use of NSAIDs in the first 24 hours was significantly inferior in Group 2. Conclusions Pre-surgical LLLT treatment seems to increase the analgesic effect of LLLT. However, trismus and edema were reduced in both laser treated groups, independently from the period of irradiation. Key words:Laser, LLLT, pain, surgery, extraction, third molars, wisdom teeth.
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Affiliation(s)
- M Petrini
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti - Italy, Via Vestini 31, 66013 Chieti, Italy
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156
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Franke TP, Koes BW, Geelen SJ, Huisstede BM. Do Patients With Carpal Tunnel Syndrome Benefit From Low-Level Laser Therapy? A Systematic Review of Randomized Controlled Trials. Arch Phys Med Rehabil 2017. [PMID: 28629992 DOI: 10.1016/j.apmr.2017.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To systematically review the literature on the effectiveness of low-level laser therapy for patients with carpal tunnel syndrome. DATA SOURCES The Cochrane Library, PubMed, Embase, CINAHL, and Physiotherapy Evidence Database were searched for relevant systematic reviews and randomized controlled trials (RCTs) up to April 8, 2016. STUDY SELECTION Two reviewers independently applied the inclusion criteria to select potential studies. DATA EXTRACTION Two reviewers independently extracted the data and assessed the methodologic quality. DATA SYNTHESIS A best-evidence synthesis was performed to summarize the results of the 2 systematic reviews and 17 RCTs that were included. Strong evidence was found for the effectiveness of low-level laser therapy compared with placebo treatment in the very short term (0 to ≤5wk). After 5 weeks, the positive effects of low-level laser therapy on pain, function, or recovery diminished over time (moderate and conflicting evidence were found at 7- and 12-wk follow-up, respectively). CONCLUSIONS In the very short term, low-level laser therapy is more effective as a single intervention than placebo low-level laser therapy in patients with carpal tunnel syndrome, after which the positive effects of low-level laser therapy tend to subside. Evidence in the midterm and long term is sparse.
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Affiliation(s)
- Thierry P Franke
- Department of Rehabilitation, Physical Therapy Science & Sports, Rudolf Magnus Institute of Neurosciences, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Bart W Koes
- Department of General Practice, Erasmus University Medical Center, Rotterdam, The Netherlands; Department of Rehabilitation Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Sven J Geelen
- Department of Rehabilitation, Physical Therapy Science & Sports, Rudolf Magnus Institute of Neurosciences, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Bionka M Huisstede
- Department of Rehabilitation, Physical Therapy Science & Sports, Rudolf Magnus Institute of Neurosciences, University Medical Center Utrecht, Utrecht, The Netherlands.
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157
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Honarmand M, Farhadmollashahi L, Vosoughirahbar E. Comparing the effect of diode laser against acyclovir cream for the treatment of herpes labialis. J Clin Exp Dent 2017. [PMID: 28638546 PMCID: PMC5474325 DOI: 10.4317/jced.53679] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Background Recently alternative therapies such as the use of diode laser therapy have been introduced for recurrent herpes labial infection. The aim of this study was to evaluate the effectiveness of diode laser for treatment of recurrent herpes labialis. Material and Methods This was single-blind randomized clinical trial to evaluate the efficacy of diode laser for the treatment of recurrent herpes labial. In total, 60 patients whit recurrent herpes simplex labialis were selected and randomly divided in to three groups. 20 patients received treatment whit diode laser (at a wavelength of 870 nm, energy density 4.5 j/cm2), 20 patients were treated with acyclovir cream 5%, 20 patients received treatment with laser-off (placebo). The end point was lesions crusting. Data analyzed by Tukey HSD Test and One-way ANOVA (at a significance level of 0.05) in SPSS-20 software. Results The mean length of recovery time (day) in the laser, off laser, and acyclovir groups was 2.20±0.41, 4.30±1.03, and 3.4±1.142, respectively. There is a significant difference between three groups in this regard (P<0.0001). The mean duration of pain (day) was 1.35±0.74, 2.65±1.27, and 2.30±0.92 for laser, off laser, and acyclovir groups, respectively (P<0.0001). Conclusions Treatment with diode laser reduced the length of recovery time and pain severity faster than treatment with acyclovir cream. Key words:Recurrent herpes labial, Acyclovir, Low level laser therapy.
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Affiliation(s)
- Marieh Honarmand
- Associated Professor, Oral and Dental Disease Research Center, Department of Oral Medicine, School of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Leila Farhadmollashahi
- Associated professor, Oral and Dental Disease Research Center, Department of Oral Medicine, School of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Ehsan Vosoughirahbar
- Postgraduate Student, Dep of Oral Medicine, School of Dentistry, Zahedan University of Medical Science, Zahedan, Iran
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158
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Nestor M, Andriessen A, Berman B, Katz BE, Gilbert D, Goldberg DJ, Gold MH, Kirsner RS, Lorenc PZ. Photobiomodulation with non-thermal lasers: Mechanisms of action and therapeutic uses in dermatology and aesthetic medicine. J COSMET LASER THER 2017; 19:190-198. [PMID: 28328287 DOI: 10.1080/14764172.2017.1293828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Non-thermal laser therapy in dermatology, is a growing field in medical technology by which therapeutic effects are achieved by exposing tissues to specific wavelengths of light. OBJECTIVES The purpose of this review was to gain a better understanding of the science behind non-thermal laser and the evidence supporting its use in dermatology. METHODS A group of dermatologists and surgeons recently convened to review the evidence supporting the use of non-thermal laser for body sculpting, improving the appearance of cellulite, and treating onychomycosis. RESULTS The use of non-thermal laser for body sculpting is supported by three randomized, double-blind, sham-controlled studies (N = 161), one prospective open-label study (N = 54), and two retrospective studies (N = 775). Non-thermal laser application for improving the appearance of cellulite is supported by one randomized, double-blind, sham-controlled study (N = 38). The use of non-thermal laser for the treatment of onychomycosis is supported by an analysis of three non-randomized, open-label studies demonstrating clinical improvement of nails (N = 292). CONCLUSIONS Non-thermal laser is steadily moving into mainstream medical practice, such as dermatology. Although present studies have demonstrated the safety and efficacy of non-thermal laser for body sculpting, cellulite reduction and onychomycosis treatment, studies demonstrating the efficacy of non-thermal laser as a stand-alone procedure are still inadequate.
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Affiliation(s)
- Mark Nestor
- a Center for Clinical and Cosmetic Research, Center for Clinical Enhancement , Aventura, Miami , Florida , USA.,b University of Miami Miller School of Medicine , Miami , Florida , USA
| | - Anneke Andriessen
- c Andriessen Consultants, Medical Director , Malden , Netherlands.,d Radboudumc, Radboud Academie , Nijmegen , Netherlands
| | - Brian Berman
- a Center for Clinical and Cosmetic Research, Center for Clinical Enhancement , Aventura, Miami , Florida , USA.,e Department of Dermatology and Cutaneous Surgery , University of Miami Miller School of Medicine , Miami , Florida , USA
| | - Bruce E Katz
- f Department of Dermatology , Icahn School of Medicine at Mt Sinai , New York , New York , USA
| | - Dore Gilbert
- g Newport Dermatology and Laser Associates , Newport Beach, Newport Beach, USA.,h Department of Dermatology , University of California , Irvine , USA
| | - David J Goldberg
- i Skin Laser & Surgery Specialists, Director , Westwood , Massachusetts , USA
| | | | - Robert S Kirsner
- b University of Miami Miller School of Medicine , Miami , Florida , USA
| | - Paul Z Lorenc
- k Lorenc Aesthetic Plastic Surgery Center , New York , New York , USA.,l Lenox Hill Hospital, New York , New York , USA
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159
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de Andrade ALM, Bossini PS, do Canto De Souza ALM, Sanchez AD, Parizotto NA. Effect of photobiomodulation therapy (808 nm) in the control of neuropathic pain in mice. Lasers Med Sci 2017; 32:865-872. [PMID: 28283814 DOI: 10.1007/s10103-017-2186-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 03/02/2017] [Indexed: 12/22/2022]
Abstract
Neuropathic pain can be defined as the pain initiated or caused by a primary lesion or dysfunction of the central or peripheral nervous system. Photobiomodulation therapy (PBM) stands out among the physical therapy resources used for analgesia. However, application parameters, especially the energy density, remain controversial in the literature. Therefore, this study aimed to investigate the PBM effect, in different energy densities to control neuropathic pain in mice. Fifty (50) mice were induced to neuropathy by chronic constriction surgery of the sciatic nerve (CCI), treated with PBM (808 nm), and divided into five groups: GP (PBM simulation), GS (sham), GL10, GL20, GL40 (energy density of 10, 20, and 40 J/cm2, respectively). The evaluations were carried out using the hot plate test and Randall and Selitto test, before and after the CCI surgery, every 15 days during the 90 days experiment. β-Endorphin blood dosage was also tested. For both the hot plate and Randall and Selitto tests, the GL20 and GL40 groups presented reduction of the nociceptive threshold from the 30th day of treatment, the GL10 group only after day 75, and the GP group did not show any improvement throughout the experiment. The β-endorphin dosage was higher for all groups when compared to the GP group. However, only the GL20 group and GL40 presented a significant increase. This study demonstrates that PBM in higher energy density (20, 40 J/cm2) is more effective in the control of neuropathic pain.
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Affiliation(s)
- Ana Laura Martins de Andrade
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, zip code: 13565-905, São Paulo, Brazil.
| | | | | | - Ariane Dutra Sanchez
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, zip code: 13565-905, São Paulo, Brazil
| | - Nivaldo Antonio Parizotto
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, zip code: 13565-905, São Paulo, Brazil
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160
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Guedes de Almeida L, Sergio LPDS, de Paoli F, Mencalha AL, da Fonseca ADS. TP53 and ATM mRNA expression in skin and skeletal muscle after low-level laser exposure. J COSMET LASER THER 2017; 19:227-231. [DOI: 10.1080/14764172.2017.1293829] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Luciana Guedes de Almeida
- Departamento de Ciências Fisiológicas, Instituto Biomédico, Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luiz Philippe da Silva Sergio
- Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Flavia de Paoli
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
| | - Andre Luiz Mencalha
- Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adenilson de Souza da Fonseca
- Departamento de Ciências Fisiológicas, Instituto Biomédico, Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
- Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
- Centro de Ciências da Saúde, Centro Universitário Serra dos Órgãos, Rio de Janeiro, Brazil
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161
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Nadur-Andrade N, Dale CS, Oliveira VRDS, Toniolo EF, Feliciano RDS, da Silva Jr. JA, Zamuner SR. Analgesic Effect of Photobiomodulation on Bothrops Moojeni Venom-Induced Hyperalgesia: A Mechanism Dependent on Neuronal Inhibition, Cytokines and Kinin Receptors Modulation. PLoS Negl Trop Dis 2016; 10:e0004998. [PMID: 27749899 PMCID: PMC5066973 DOI: 10.1371/journal.pntd.0004998] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 08/22/2016] [Indexed: 01/02/2023] Open
Abstract
Background Envenoming induced by Bothrops snakebites is characterized by drastic local tissue damage that involves an intense inflammatory reaction and local hyperalgesia which are not neutralized by conventional antivenom treatment. Herein, the effectiveness of photobiomodulation to reduce inflammatory hyperalgesia induced by Bothrops moojeni venom (Bmv), as well as the mechanisms involved was investigated. Methodology/Principal Findings Bmv (1 μg) was injected through the intraplantar route in the right hind paw of mice. Mechanical hyperalgesia and allodynia were evaluated by von Frey filaments at different time points after venom injection. Low level laser therapy (LLLT) was applied at the site of Bmv injection at wavelength of red 685 nm with energy density of 2.2 J/cm2 at 30 min and 3 h after venom inoculation. Neuronal activation in the dorsal horn spinal cord was determined by immunohistochemistry of Fos protein and the mRNA expression of IL-6, TNF-α, IL-10, B1 and B2 kinin receptors were evaluated by Real time-PCR 6 h after venom injection. Photobiomodulation reversed Bmv-induced mechanical hyperalgesia and allodynia and decreased Fos expression, induced by Bmv as well as the mRNA levels of IL-6, TNF-α and B1 and B2 kinin receptors. Finally, an increase on IL-10, was observed following LLLT. Conclusion/Significance These data demonstrate that LLLT interferes with mechanisms involved in nociception and hyperalgesia and modulates Bmv-induced nociceptive signal. The use of photobiomodulation in reducing local pain induced by Bothropic venoms should be considered as a novel therapeutic tool for the treatment of local symptoms induced after bothropic snakebites. Envenoming caused by Bothrops snakes is characterized by drastic local tissue damage involving hemorrhage, blistering, myonecrosis, prominent inflammatory response and intense pain. The most effective treatment for Bothrops snakebites is antivenom therapy, which is very efficient in reversing systemic effects of envenomation but not the severe local effects. Thus, there exists a need to find novel complementary therapies that may further assist in the prevention or even counteract the severe local effects of bothrops snakebite. Several studies have shown the effectiveness of photobiomodulation in reducing local effects induced by Bothropic venoms, however its mechanisms still remain unknown. In this study, we analyzed the effectiveness of photobiomodulation in reducing BmV-induced mechanical allodynia and hyperalgesia as well as part of the mechanisms involved in such effect. Results demonstrate that photobiomodulation reduces venom-induced mechanical allodynia and hyperalgesia and this effect depends on a decrease of nociceptor activation at the spinal cord level and by a modulation of pro- and anti- inflammatory cytokines as well as kinin receptors at mRNA transcriptional levels. These findings make phtobiomodulation a promising candidate to be associated to antivenom therapy for the treatment of the local response induced by Bothrops venoms.
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Affiliation(s)
| | - Camila Squarzoni Dale
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | | | - Elaine Flamia Toniolo
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
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162
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Low-level laser therapy in 3D cell culture model using gingival fibroblasts. Lasers Med Sci 2016; 31:973-8. [DOI: 10.1007/s10103-016-1945-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/20/2016] [Indexed: 12/16/2022]
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163
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Light-Emitting Diode Phototherapy Reduces Nocifensive Behavior Induced by Thermal and Chemical Noxious Stimuli in Mice: Evidence for the Involvement of Capsaicin-Sensitive Central Afferent Fibers. Mol Neurobiol 2016; 54:3205-3218. [PMID: 27056078 DOI: 10.1007/s12035-016-9887-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 03/28/2016] [Indexed: 12/11/2022]
Abstract
Low-intensity phototherapy using light fonts, like light-emitting diode (LED), in the red to infrared spectrum is a promising alternative for the treatment of pain. However, the underlying mechanisms by which LED phototherapy reduces acute pain are not yet well understood. This study investigated the analgesic effect of multisource LED phototherapy on the acute nocifensive behavior of mice induced by thermal and chemical noxious stimuli. The involvement of central afferent C fibers sensitive to capsaicin in this effect was also investigated. Mice exposed to multisource LED (output power 234, 390, or 780 mW and power density 10.4, 17.3, and 34.6 mW/cm2, respectively, from 10 to 30 min of stimulation with a wavelength of 890 nm) showed rapid and significant reductions in formalin- and acetic acid-induced nocifensive behavior. This effect gradually reduced but remained significant for up to 7 h after LED treatment in the last model used. Moreover, LED (390 mW, 17.3 mW/cm2/20 min) irradiation also reduced nocifensive behavior in mice due to chemical [endogenous (i.e., glutamate, prostaglandins, and bradykinin) or exogenous (i.e., formalin, acetic acid, TRPs and ASIC agonist, and protein kinase A and C activators)] and thermal (hot plate test) stimuli. Finally, ablating central afferent C fibers abolished LED analgesia. These experimental results indicate that LED phototherapy reduces the acute painful behavior of animals caused by chemical and thermal stimuli and that LED analgesia depends on the integrity of central afferent C fibers sensitive to capsaicin. These findings provide new information regarding the underlying mechanism by which LED phototherapy reduces acute pain. Thus, LED phototherapy may be an important tool for the management of acute pain.
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164
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Liebert AD, Chow RT, Bicknell BT, Varigos E. Neuroprotective Effects Against POCD by Photobiomodulation: Evidence from Assembly/Disassembly of the Cytoskeleton. J Exp Neurosci 2016; 10:1-19. [PMID: 26848276 PMCID: PMC4737522 DOI: 10.4137/jen.s33444] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 12/09/2015] [Accepted: 12/15/2015] [Indexed: 02/07/2023] Open
Abstract
Postoperative cognitive dysfunction (POCD) is a decline in memory following anaesthesia and surgery in elderly patients. While often reversible, it consumes medical resources, compromises patient well-being, and possibly accelerates progression into Alzheimer's disease. Anesthetics have been implicated in POCD, as has neuroinflammation, as indicated by cytokine inflammatory markers. Photobiomodulation (PBM) is an effective treatment for a number of conditions, including inflammation. PBM also has a direct effect on microtubule disassembly in neurons with the formation of small, reversible varicosities, which cause neural blockade and alleviation of pain symptoms. This mimics endogenously formed varicosities that are neuroprotective against damage, toxins, and the formation of larger, destructive varicosities and focal swellings. It is proposed that PBM may be effective as a preconditioning treatment against POCD; similar to the PBM treatment, protective and abscopal effects that have been demonstrated in experimental models of macular degeneration, neurological, and cardiac conditions.
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Affiliation(s)
| | - Roberta T. Chow
- Brain and Mind Institute, University of Sydney, Sydney, NSW, Australia
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