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Selestin Raja I, Kim C, Oh N, Park JH, Hong SW, Kang MS, Mao C, Han DW. Tailoring photobiomodulation to enhance tissue regeneration. Biomaterials 2024; 309:122623. [PMID: 38797121 DOI: 10.1016/j.biomaterials.2024.122623] [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] [Received: 02/07/2024] [Revised: 04/25/2024] [Accepted: 05/19/2024] [Indexed: 05/29/2024]
Abstract
Photobiomodulation (PBM), the use of biocompatible tissue-penetrating light to interact with intracellular chromophores to modulate the fates of cells and tissues, has emerged as a promising non-invasive approach to enhancing tissue regeneration. Unlike photodynamic or photothermal therapies that require the use of photothermal agents or photosensitizers, PBM treatment does not need external agents. With its non-harmful nature, PBM has demonstrated efficacy in enhancing molecular secretions and cellular functions relevant to tissue regeneration. The utilization of low-level light from various sources in PBM targets cytochrome c oxidase, leading to increased synthesis of adenosine triphosphate, induction of growth factor secretion, activation of signaling pathways, and promotion of direct or indirect gene expression. When integrated with stem cell populations, bioactive molecules or nanoparticles, or biomaterial scaffolds, PBM proves effective in significantly improving tissue regeneration. This review consolidates findings from in vitro, in vivo, and human clinical outcomes of both PBM alone and PBM-combined therapies in tissue regeneration applications. It encompasses the background of PBM invention, optimization of PBM parameters (such as wavelength, irradiation, and exposure time), and understanding of the mechanisms for PBM to enhance tissue regeneration. The comprehensive exploration concludes with insights into future directions and perspectives for the tissue regeneration applications of PBM.
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Affiliation(s)
| | - Chuntae Kim
- Institute of Nano-Bio Convergence, Pusan National University, Busan, 46241, Republic of Korea; Center for Biomaterials Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Nuri Oh
- Department of Chemistry and Biology, Korea Science Academy of KAIST, Busan, 47162, Republic of Korea
| | - Ji-Ho Park
- Department of Bio and Brain Engineering and KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, 46241, Republic of Korea
| | - Moon Sung Kang
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, 46241, Republic of Korea
| | - Chuanbin Mao
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Sha Tin, Hong Kong SAR, China.
| | - Dong-Wook Han
- Institute of Nano-Bio Convergence, Pusan National University, Busan, 46241, Republic of Korea; Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, 46241, Republic of Korea.
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Fantaguzzi F, Tombolini B, Servillo A, Zucchiatti I, Sacconi R, Bandello F, Querques G. Shedding Light on Photobiomodulation Therapy for Age-Related Macular Degeneration: A Narrative Review. Ophthalmol Ther 2023; 12:2903-2915. [PMID: 37768527 PMCID: PMC10640464 DOI: 10.1007/s40123-023-00812-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 08/31/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND Photobiomodulation (PBM) relies on the pathophysiological mechanism whereby red to near-infrared light can target mitochondrial activity and promote ATP synthesis. Preclinical and clinical studies have shown promising results in treating intermediate age-related macular degeneration (AMD), since PBM can produce photochemical reactions in endogenous retinal chromophores. Currently, PBM is approved by the Food and Drug Administration and by the European Medicines Agency for the treatment of intermediate AMD. This narrative review aimed to evaluate the available evidence on the effectiveness and safety of PBM in treating intermediate AMD. METHODS A comprehensive search was conducted using the PubMed database, employing the keywords "photobiomodulation" and "age-related macular degeneration." All English-language studies published up to June 2023 were reviewed, and the search was expanded to include relevant references from selected articles. The included publications were analyzed for this review. RESULTS The available studies on PBM in AMD demonstrated promising but inconsistent results. PBM showed potential in improving best-corrected visual acuity (BCVA) and contrast sensitivity (CS) in patients with AMD. Some studies also suggested a reduction in AMD lesions, such as drusen volume. However, the long-term efficacy and optimal treatment parameters of PBM in AMD remained to be fully determined due to the limitations of the available studies. These included variations in irradiation techniques, wavelengths, exposure times, and treatment sessions, making it challenging to generalize the effectiveness of PBM. Furthermore, the lack of accurate classification of AMD phenotypes in the available studies hindered the understanding of which phenotypes could truly benefit from this treatment. Finally, the strength of evidence varied among studies, with limited sample sizes, unpublished results, and only three randomized sham-controlled trials. CONCLUSIONS Currently, the effectiveness of PBM in promoting drusen resorption or preventing progression to advanced forms of AMD, as observed in the cited studies, remains uncertain.
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Affiliation(s)
- Federico Fantaguzzi
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Beatrice Tombolini
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Andrea Servillo
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Ilaria Zucchiatti
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Riccardo Sacconi
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Francesco Bandello
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Giuseppe Querques
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy.
- Division of Head and Neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy.
- Department of Ophthalmology, Vita-Salute San Raffaele University, Via Olgettina 60, 20132, Milan, Italy.
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Coelho IA, Cerutti ML, Arruda G, Kraus SI, Lorbiéski JK, Souza RCDE, Pansini M, Valente C. Acupuncture and laserpuncture as a therapeutic approach for nociception and inflammation: An experimental study in mice. AN ACAD BRAS CIENC 2023; 95:e20230104. [PMID: 37466544 DOI: 10.1590/0001-3765202320230104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/23/2023] [Indexed: 07/20/2023] Open
Abstract
Inflammation and pain are consequences of injuries or diseases that affect a large number of people. This study aims to evaluate the effect of acupuncture and laserpuncture on nociception and inflammation in mice compared to the effects of morphine and dexamethasone. 140 male Swiss mice were used. Treatment with acupuncture and laserpuncture were performed at the acupoints LI11, ST36, GB34, and BL60 in mice. To evaluate the effect of acupuncture and laserpuncture on nociception, the hot plate test and intraplantar formalin injection were used. The effect of acupuncture and laserpuncture on the inflammation was evaluated through carrageenan-induced paw edema. Thermographic analysis was also applied to evaluate the anti-inflammatory effects. An antinociceptive effect (≈57%) was observed in treatments with acupuncture and laserpuncture, equivalent to the effect of morphine. Laserpuncture and acupuncture decreased paw edema by ≈25%. Acupuncture had an effect equivalent to dexamethason, basides reducing the neurogenic phase by 35% and the inflammatory phase in formalin-induced nociception by 40%, equivalent to the effects of morphine. In thermographic analysis, acupuncture, laserpuncture, morphine, and negative control had paw temperature of ≈27 °C, while formalin treatment was 31°C. Acupuncture and laserpuncture proved to be effective therapies for the treatment of inflammatory and painful processes.
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Affiliation(s)
- Iara A Coelho
- Universidade Regional de Blumenau, Departamento de Medicina, Rua Antônio da Veiga 140, 89030-903 Blumenau, SC, Brazil
| | - Murilo Luiz Cerutti
- Universidade Regional de Blumenau, Departamento de Medicina, Rua Antônio da Veiga 140, 89030-903 Blumenau, SC, Brazil
| | - Gisele Arruda
- Programa de Pós-Graduação em Ciências Aplicadas à Saúde, Universidade Estadual do Oeste do Paraná, Centro de Ciências da Saúde, Rodovia Vitório Traiano Km 2, 85601-970 Francisco Beltrão, PR, Brazil
| | - Scheila I Kraus
- Programa de Pós-Graduação em Neurociência, Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Rua Engenheiro Agronômico Andrei Cristian Ferreira, s/n, 88040-900 Florianópolis, SC, Brazil
| | - Jhenifer K Lorbiéski
- Universidade Regional de Blumenau, Departamento de Medicina, Rua Antônio da Veiga 140, 89030-903 Blumenau, SC, Brazil
| | - Regina Célia DE Souza
- RCSouza Terapias Orientais, Clínica privada, Rua Dr. Osvaldo Nunes Ribeiro, 80, 82630-147 Curitiba, PR, Brazil
| | - Mário Pansini
- Universidade Regional de Blumenau, Departamento de Medicina, Rua Antônio da Veiga 140, 89030-903 Blumenau, SC, Brazil
| | - Caroline Valente
- Universidade Regional de Blumenau, Departamento de Medicina, Rua Antônio da Veiga 140, 89030-903 Blumenau, SC, Brazil
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Yoshizawa Y. Improvements in lupus miliaris disseminatus faciei after three-color (blue, red, and infrared) light-emitting diode monotherapy. JAAD Case Rep 2023; 36:28-31. [PMID: 37361405 PMCID: PMC10285120 DOI: 10.1016/j.jdcr.2023.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023] Open
Affiliation(s)
- Yusuke Yoshizawa
- Correspondence to: Yusuke Yoshizawa, MD, PhD, Yoshizawa Dermatology Research Clinic, KS Bill 2F 342-3 Katakura-Cho, Hachioji, Tokyo 192-0914, Japan.
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Okur S, Okumuş Z. Effects of low-level laser therapy and therapeutic ultrasound on Freund's complete adjuvant-induced knee arthritis model in rats. Arch Rheumatol 2023; 38:32-43. [PMID: 37235114 PMCID: PMC10208612 DOI: 10.46497/archrheumatol.2022.9409] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 02/05/2022] [Indexed: 08/08/2023] Open
Abstract
OBJECTIVES The aim of this study was to evaluate and monitor the effect of low-level laser therapy (LLLT) and therapeutic ultrasound (TU) alone, or combined with intra-articular prednisolone (P) in Freund's complete adjuvant (FCA)-induced knee arthritis model in rats. MATERIALS AND METHODS A total of 56 adult male Wistar rats were divided into seven groups: control (C), disease control (RA), P, TU, LLLT (L), P + TU (P+TU), P + LLLT (P+L) groups. The skin temperature, radiography, joint volume, serum rheumatoid factor (RF), interleukin (IL)-1β, serum tumor necrosis factor-alpha (TNF-α), and histopathological evaluation of joint were performed. RESULTS Thermal imaging and radiographic examination provided results consistent with the severity of the disease. The mean joint temperature (°C) was the highest in the RA (36.2±1.6) group on Day 28. The P+TU and P+L groups significantly decreased radiological scores at the end of the study. The rat serum TNF-α, IL-1β, and RF levels in all groups were significantly higher compared to the C group (p<0.05). Compared to the RA group, serum TNF-α, IL-1β, and RF levels were significantly lower in the treatment groups (p<0.05). The P+TU and P+L group was showed minimal chondrocyte degeneration and cartilage erosion and mild cartilage fibrillation and mononuclear cell infiltration of synovial membrane compared to the P, TU, and L group. CONCLUSION The LLLT and TU effectively reduced inflammation. In addition, a more effective result was obtained from the use of LLLT and TU combined with intra-articular P. This result may be due to insufficient dose of LLLT and TU, thus further studies should be focus on at higher dose ranges on FCA arthritis model in rats.
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Affiliation(s)
- Sıtkıcan Okur
- Department of Veterinary Surgery, Atatürk University Faculty of Veterinary Medicine, Erzurum, Türkiye
| | - Zafer Okumuş
- Department of Veterinary Surgery, Atatürk University Faculty of Veterinary Medicine, Erzurum, Türkiye
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Ko YS, Gi EJ, Lee S, Cho HH. Dual red and near-infrared light-emitting diode irradiation ameliorates LPS-induced otitis media in a rat model. Front Bioeng Biotechnol 2023; 11:1099574. [PMID: 36911197 PMCID: PMC9992796 DOI: 10.3389/fbioe.2023.1099574] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 01/30/2023] [Indexed: 02/25/2023] Open
Abstract
Objective: Otitis media (OM) is an infectious and inflammatory disease of the middle ear (ME) that often recurs and requires long-term antibiotic treatment. Light emitting diode (LED)-based devices have shown therapeutic efficacy in reducing inflammation. This study aimed to investigate the anti-inflammatory effects of red and near-infrared (NIR) LED irradiation on lipopolysaccharide (LPS)-induced OM in rats, human middle ear epithelial cells (HMEECs), and murine macrophage cells (RAW 264.7). Methods: An animal model was established by LPS injection (2.0 mg/mL) into the ME of rats via the tympanic membrane. A red/NIR LED system was used to irradiate the rats (655/842 nm, intensity: 102 mW/m2, time: 30 min/day for 3 days and cells (653/842 nm, intensity: 49.4 mW/m2, time: 3 h) after LPS exposure. Hematoxylin and eosin staining was performed to examine pathomorphological changes in the tympanic cavity of the ME of the rats. Enzyme-linked immunosorbent assay, immunoblotting, and RT-qPCR analyses were used to determine the mRNA and protein expression levels of interleukin-1β (IL-1β), IL-6, and tumor necrosis factor-α (TNF-α). Mitogen-activated protein kinases (MAPKs) signaling was examined to elucidate the molecular mechanism underlying the reduction of LPS-induced pro-inflammatory cytokines following LED irradiation. Results: The ME mucosal thickness and inflammatory cell deposits were increased by LPS injection, which were reduced by LED irradiation. The protein expression levels of IL-1β, IL-6, and TNF-α were significantly reduced in the LED-irradiated OM group. LED irradiation strongly inhibited the production of LPS-stimulated IL-1β, IL-6, and TNF-α in HMEECs and RAW 264.7 cells without cytotoxicity in vitro. Furthermore, the phosphorylation of ERK, p38, and JNK was inhibited by LED irradiation. Conclusion: This study demonstrated that red/NIR LED irradiation effectively suppressed inflammation caused by OM. Moreover, red/NIR LED irradiation reduced pro-inflammatory cytokine production in HMEECs and RAW 264.7 cells through the blockade of MAPK signaling.
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Affiliation(s)
- Yoo-Seung Ko
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Eun-Ji Gi
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, Republic of Korea.,Department of Biomedical Science, College of Medicine, Chonnam National University Graduate School, BK21 PLUS Center for Creative Biomedical Scientists at Chonnam National University, Gwangju, Republic of Korea
| | - Sungsu Lee
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Hyong-Ho Cho
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, Republic of Korea
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Petrowski K, Schmalbach B, Linhardt M, Mekschrat L, Rohleder N. The inflammatory immune system after wake up in healthy male individuals: A highly standardized and controlled study. Brain Behav Immun Health 2022; 25:100504. [PMID: 36093437 PMCID: PMC9450065 DOI: 10.1016/j.bbih.2022.100504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 08/01/2022] [Accepted: 08/23/2022] [Indexed: 11/22/2022] Open
Abstract
This study investigates the effects of two light conditions on innate proinflammatory IL-6 cytokines and the cortisol awakening response. The between-subject experiment was conducted with 55 healthy adult-males (aged Mbright = 24.40, SD = 4.58; Mdim = 25.47, SD = 4.96) in a standardized sleep laboratory setting with 60-min light exposure post-awakening. Cortisol significantly increased with bright light exposure as compared to dim light (significant interaction effect). As for IL-6, the main effects of time and light condition were significant, however, the interaction effect between light and time was insignificant. Results replicate stimulatory effects of bright light on cortisol. In general, IL-6 concentrations decreased in both light conditions; however, bright light graphically showed higher concentrations 45–90 min after exposure in comparison to dim light, thus bright light has a potential stimulatory effect on IL-6 production.
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Wang F, Shan H, Song G, Chen S, Zhang C, Liu Y, Wu T. 17β-Estradiol attenuates inflammation and tendon degeneration in a rat model of Achilles tendinitis. Immunopharmacol Immunotoxicol 2022; 44:556-564. [PMID: 35404181 DOI: 10.1080/08923973.2022.2065639] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION 17β-Estradiol (E2) is an immune-regulatory agent with anti-inflammatory effects. However, it is still unknown whether E2 exerts pharmacological properties against Achilles tendinitis (AT). This study aims to investigate the effects of E2 on AT and its underlying mechanisms. MATERIALS AND METHODS The established model of Achilles tendinitis was intraperitoneally injected with E2 (10, 20, or 30 μg/kg/d). After 8 weeks, biomechanical properties of the Achilles tendon were determined. Hydroxyproline content and tendon degeneration-related biomarkers were determined. The levels of inflammatory cytokines and apoptotic-related biomarkers in tendon tissues were determined. Furthermore, western blotting was determined to detect the expressions of ER-α and the PI3K/Akt pathway in tendon tissues. RESULTS E2 relieved AT-related symptoms in a dose-dependent manner. E2 ameliorated tendon degeneration by regulating tendon degeneration-related biomarkers (e.g., collagen type I and III, Decorin (DCN), and tenascin-C). Besides, treatment with E2 suppressed inflammatory cytokines and increased anti-inflammatory cytokines. Treatment with E2 also regulated cell apoptosis in tendon tissues. The underlying mechanism study revealed that treatment with E2 activated ER-α and upregulated the PI3K/Akt pathway. CONCLUSION The regulatory effects of E2 on inflammation and tendon degeneration in a rat model of AT were associated with the ER-α and the PI3K/Akt signaling pathways.
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Affiliation(s)
- Feng Wang
- Department of Orthopaedical Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200000, China
| | - Haojie Shan
- Department of Orthopaedical Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200000, China
| | - Guoxun Song
- Department of Orthopaedical Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200000, China
| | - Song Chen
- Department of Orthopaedical Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200000, China
| | - Chengyuan Zhang
- Department of Orthopaedical Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200000, China
| | - Yingjie Liu
- Department of Orthopaedical Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200000, China
| | - Tianyi Wu
- Department of Orthopaedical Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200000, China
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The use of LED therapy to treat synovial joints disorders: scoping review. Lasers Med Sci 2021; 37:701-721. [PMID: 34258669 DOI: 10.1007/s10103-021-03372-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 07/05/2021] [Indexed: 10/20/2022]
Abstract
The aim of this scoping review was to assess the extent of the literature on the use of LED therapy to treat synovial joint disorders. The JBI methodology for scoping reviews was followed. The databases used were PUBMED, EMBASE, Scopus, Web of Science, LILACS, PEDro, Cochrane Database, Google Scholar and ProQuest. To be included, studies should have used LED as therapy, and include at least one measure related to the structures of any synovial joint. The search strategy included all keywords and indexed terms identified in the articles. Studies in any language and in any year, whether published or not, were included. The analysis of the studies was carried out by two independent reviewers. Data were extracted from articles using a data extraction tool developed by the reviewers. After carrying out the definitive search and selection, 47 publications were included: 15 clinical trials, 8 clinical protocols, 12 animal studies, 4 in vitro studies and 8 reviews on the topic. Studies have shown great variability from the device and number of diodes used, to the parameters and dosimetry chosen. Some positive effects were observed: on cell proliferation (in vitro); on anti-inflammatory biomarkers (murine models) and on pain scale (clinical trials - TMD). Although, the cause of non-significant results in clinical trials was rarely discussed: depth of penetration, dosimetry, follow-up time? Thus, future studies should focus on answering more elementary aspects about the LED effect when used alone in different synovial joints.
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Abstract
This review attempts to unveil the possible mechanisms underlying how gut lymph affects lung and further gives rise to acute respiratory distress syndrome, as well as potential interventional targets under the condition of ischemia-reperfusion injury. We searched electronic databases including PubMed, MEDLINE, Cochrane Central Register of Controlled Trials, Google Scholar, Web of Science, and Embase to identify relevant literatures published up to December 2019. We enrolled the literatures including the Mesh Terms of “gut lymph or intestinal lymph and acute lung injury or acute respiratory distress syndrome.” Gut is considered to be the origin of systemic inflammation and the engine of multiple organ distress syndrome in the field of critical care medicine, whereas gut lymph plays a pivotal role in initiation of ischemia-reperfusion injury-induced acute respiratory distress syndrome. In fact, in the having been established pathologic model of sepsis leading to multiple organ dysfunction named by Gut Lymph theory, a variety of literatures showed the position and role of changes in gut lymph components in the initiation of systemic inflammatory response, which allows us to screen out potential intervention targets to pave the way for future clinic and basic research.
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Feliciano RDS, Atum ALB, Ruiz ÉGDS, Serra AJ, Antônio EL, Manchini MT, Silva JMA, Tucci PJF, Nathanson L, Morris M, Chavantes MC, Silva Júnior JA. Photobiomodulation Therapy on Myocardial Infarction in Rats: Transcriptional and Posttranscriptional Implications to Cardiac Remodeling. Lasers Surg Med 2021; 53:1247-1257. [PMID: 33846991 DOI: 10.1002/lsm.23407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 03/15/2021] [Accepted: 03/22/2021] [Indexed: 01/29/2023]
Abstract
BACKGROUND AND OBJECTIVES Induction of myocardial infarction (MI) in rats by occlusion of the left anterior descending coronary artery is an experimental model used in research to elucidate functional, structural, and molecular modifications associated with ischemic heart disease. Photobiomodulation therapy (PBMT) has become a therapeutic alternative by modulating various biological processes eliciting several effects, including anti-inflammatory and pro-proliferative actions. The main objective of this work was to evaluate the effect of PBMT in the modulation of transcriptional and post-transcriptional changes that occurred in myocardium signal transduction pathways after MI. STUDY DESIGN/MATERIALS AND METHODS Continuous wave (CW) non-thermal laser parameters were: 660 nm wavelength, power 15 mW, with a total energy of 0.9 J, fluence of 1.15 J/cm2 , spot size of 0.785 cm2 , and time of 60 seconds. Using in silico analysis, we selected and then, quantified the expression of messenger RNA (mRNA) of 47 genes of 9 signaling pathways associated with MI (angiogenesis, cell survival, hypertrophy, oxidative stress, apoptosis, extracellular matrix, calcium kinetics, cell metabolism, and inflammation). Messenger RNA expression quantification was performed in myocardial samples by polymerase chain reaction real-time array using TaqMan customized plates. RESULTS Our results evidenced that MI modified mRNA expression of several well-known biomarkers related to detrimental cardiac activity in almost all signaling pathways analyzed. However, PBMT reverted most of these transcriptional changes. More expressively, PBMT provoked a robust decrease in mRNA expression of molecules that participate in post-MI inflammation and ECM composition, such as IL-6, TNF receptor, TGFb1, and collagen I and III. Global microRNA (miRNA) expression analysis revealed that PBMT decreased miR-221, miR-34c, and miR-93 expressions post-MI, which are related to deleterious effects in cardiac remodeling. CONCLUSION Thus, the identification of transcriptional and post-transcriptional changes induced by PBMT may be used to interfere in the molecular dynamics of cardiac remodeling post-MI.
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Affiliation(s)
| | | | | | - Andrey Jorge Serra
- Universidade Federal de São Paulo, Rua Pedro de Toledo 709, Vila Clementino, São Paulo, SP, 04039-001, Brazil
| | - Ednei Luiz Antônio
- Universidade Federal de São Paulo, Rua Pedro de Toledo 709, Vila Clementino, São Paulo, SP, 04039-001, Brazil
| | | | | | - Paulo José Ferreira Tucci
- Universidade Federal de São Paulo, Rua Pedro de Toledo 709, Vila Clementino, São Paulo, SP, 04039-001, Brazil
| | - Lubov Nathanson
- Nova Southeastern University, 3301 College Avenue, Fort Lauderdale, Florida, 33314
| | - Mariana Morris
- Nova Southeastern University, 3301 College Avenue, Fort Lauderdale, Florida, 33314
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Campos L, Cotomacio CC, Arana-Chavez VE, Simões A. Phototherapy With LED as an Effective Treatment for Chemotherapy-Induced Oral Mucositis in Hamsters. J Lasers Med Sci 2021; 11:475-480. [PMID: 33425300 DOI: 10.34172/jlms.2020.74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction: Oral mucositis (OM) has been considered one of the most feared collateral effects of oncological treatments. Some therapies have been used, such as light-emitting diode (LED), with promising results, but with no sufficient evidence in the literature. Objective: Our study aimed to evaluate, by clinical and histological analysis, the effect of LED on the treatment of chemotherapy-induced OM (CIOM) in an animal model. Methods: Twenty male hamsters were equally distributed to two groups: control (C), which received anesthesia and CIOM induction; and LED (L), which received anesthesia, CIOM induction, and LED treatment (635 nm, 120 mW, 0.48 J). The clinical analysis was performed through two specific scales for OM analysis on days 5, 7 and 10 of the experiment. In addition, the injured area of all hamsters check pouch mucosa was removed and processed for histological analysis on the last experimental day. Results: After statistical analysis, group L showed less severity of OM when compared with the C group (P <0.05); beyond that, both healed completely on day 10. Conclusion: Our results suggested that the phototherapy with LED had a positive effect on accelerating repair, reducing the severity of CIOM.
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Affiliation(s)
- Luana Campos
- Department of post-graduation, School of Dentistry, University of Santo Amaro, São Paulo 04829-300, Brazil.,Department of Oral Medicine, Brazilian Institute of Cancer Control, São Paulo 03102-002, Brazil
| | - Claudia Carrara Cotomacio
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo 05508-000, Brazil
| | - Victor Elias Arana-Chavez
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo 05508-000, Brazil
| | - Alyne Simões
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo 05508-000, Brazil
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Glass GE. Photobiomodulation: A review of the molecular evidence for low level light therapy. J Plast Reconstr Aesthet Surg 2020; 74:1050-1060. [PMID: 33436333 DOI: 10.1016/j.bjps.2020.12.059] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 11/18/2020] [Accepted: 12/19/2020] [Indexed: 12/22/2022]
Abstract
Light energy is harnessed for therapeutic use in a number of ways, most recently by way of photobiomodulation (PBM). This phenomenon is a cascade of physiological events induced by the nonthermal exposure of tissue to light at the near infrared end of the visible spectrum. Therapeutic PBM has become a highly commercialized interest, marketed for everything from facial rejuvenation to fat loss, and diode-based devices are popular in both the clinic setting and for use at home. The lack of regulatory standards makes it difficult to draw clear conclusions about efficacy and safety but it is crucial that we understand the theoretical basis for PBM, so that we can engage in an honest dialogue with our patients and design better clinical studies to put claims of efficacy to the test. This article presents a summary of the science of PBM and examines the differences between laser light, on which much of the preclinical evidence is based and light from diodes, which are typically used in a clinical setting.
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Affiliation(s)
- Graeme E Glass
- Department of Surgery, Sidra Medicine, Doha, Qatar; Chair, laser safety committee, Sidra Medicine, Doha, Qatar; Weill Cornell Medical College, New York and Qatar.
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Photobiomodulation therapy on expression of HSP70 protein and tissue repair in experimental acute Achilles tendinitis. Lasers Med Sci 2020; 36:1201-1208. [PMID: 33037560 DOI: 10.1007/s10103-020-03155-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/01/2020] [Indexed: 10/23/2022]
Abstract
The aim of the present study was to investigate the effects of photobiomodulation (PBM) therapy on the expression of heat shock protein 70 (HSP70) and tissue repair in an experimental model of collagenase-induced Achilles tendinitis. Thirty Wistar rats (aged 12 weeks) were randomly distributed among control group (n = 8), tendinitis group (n = 11), and LED group (n = 11). Tendinitis was induced in the tendinitis and LED groups through a peritendinous injection of collagenase (100 μl). The LED group animals received the first irradiation 1 h after injury. A 630 ± 20 nm, 300-mW continuous wave light-emitting diode (LED), spot size 1 cm2, was placed in contact with the skin. One point over the tendon was irradiated for 30 s, delivering 9 J (9 J/cm2). LED irradiation was performed once daily for 7 days, with the total energy delivered being 63 J. The tendons were surgically removed and expression of the HSP70 protein was calculated using semi-quantitative analyses of immunohistochemistry (HSCORE). Number of fibroblasts and amount of collagen were measured using histological and histochemical analyses. An increase in the mean HSCORE for HSP70, in the number of fibroblasts, and in the amount of collagen were found in the LED group compared with those in the tendinitis and control group (P ≤ 0.05). PBM therapy increased the expression of the HSP70, number of fibroblasts, and amount of collagen in the acute Achilles tendinitis in rats.
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Nascimento LDES, Nicolau RA, Maia Filho ALM, Nascimento KFES, Santos JZLV, Sousa RCD, Carvalho LFM, Viana VGF. Effect of low intensity photobiomodulation associated with norbixin-based poly (hydroxybutyrate) membrane on post-tenotomy tendon repair. In vivo study. Acta Cir Bras 2020; 35:e202000303. [PMID: 32490900 PMCID: PMC7357841 DOI: 10.1590/s0102-865020200030000003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 02/15/2020] [Indexed: 12/29/2022] Open
Abstract
Purpose: To evaluate the in vivo response of photobiomodulation therapy associated with norbixin-based poly(hydroxybutyrate) membrane (PHB) in tenotomized calcaneal tendon. Methods: Thirty rats were randomly allocated to six groups (n=5 each): LED groups (L1, L2 and L3) and membrane + LED groups (ML1, ML2 and ML3). The right calcaneal tendons of all animals were sectioned transversely and were irradiated with LED daily, one hour after surgery every 24 hours, until the day of euthanasia. At the end of the experiments the tendons were removed for histological analysis. Results: The histological analysis showed a significant reduction in inflammatory cells in the ML1, ML2 and ML3 groups (p=0.0056, p=0.0018 and p<0.0001, respectively) compared to those in the LED group. There was greater proliferation of fibroblasts in the ML1 (p<0.0001) and L3 (p<0.0001) groups. A higher concentration of type I collagen was also observed in the ML1 group (p=0.0043) replacing type III collagen. Conclusion: Photobiomodulation in association with norbixin-based PHB membrane led to control of the inflammatory process. However, it did not favor fibroblast proliferation and did not optimize type I collagen formation in the expected stage of the repair process.
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Michanek P, Toth T, Bergström E, Treffenberg-Pettersson H, Bergh A. Effect of infrared and red monochromatic light on equine wound healing. Equine Vet J 2020; 53:143-148. [PMID: 32285517 DOI: 10.1111/evj.13266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 04/02/2020] [Accepted: 04/04/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Light-emitting diodes (LEDs) are commonly used for treating a variety of disorders in horses, including wounds. Despite its claim to shorten healing times, there is a lack of scientific documentation regarding its effects. OBJECTIVES To investigate if treatment with pulsating visible red light (λ ≈ 637 nm) and near-infrared (NIR) light (λ ≈ 956 nm) affects wound healing. STUDY DESIGN Randomised blinded controlled experimental study. METHODS A circular skin wound (Ø = 2 cm) was created on each side of the neck in eight healthy horses. One randomly chosen wound received light treatment and the other served as an untreated control. Treatment duration was 4 minutes and 40 seconds (red light 95 seconds, 2.3 mW/cm2 ; NIR light 185 seconds, 6.4 mW/cm2 ) and was performed once daily on day 0-4, 7-11, 14-18 and 21-25. The wounds were photographed and evaluated using digital photoplanimetry on day 0, 1, 2, 3, 4, 7, 14, 21, 28 and 35. The degree of swelling was assessed with diagnostic ultrasound on the same days except the last recording was performed on day 36 instead of 35. Days to total healing was recorded. ANOVA was used for statistical analysis (P < .05). RESULTS The wound area (P = .2-.9) and degree of swelling (P = .2-1.0) did not differ between treated and control groups on any day. There was a significant difference (P = .03) in healing time between control (49.0, 95% CI = 35.4-62.6 days) and treated wounds (51.8, 95% CI = 38.7-64.8 days). MAIN LIMITATIONS The wounds were treated until day 25 and this study does not investigate the effect of a longer treatment period than 25 days. CONCLUSIONS The results of this study do not indicate any clinically relevant positive effect of pulsating visible red light and NIR light on the healing of experimental skin wounds in horses, compared with no treatment.
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Affiliation(s)
- Peter Michanek
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Tamás Toth
- University Animal Hospital, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Evelina Bergström
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | | | - Anna Bergh
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Lopes Silva RSD, Pessoa DR, Mariano RR, Castro ABS, de Oliveira RA, Ferraresi C. Systematic Review of Photobiomodulation Therapy (PBMT) on the Experimental Calcaneal Tendon Injury in Rats. Photochem Photobiol 2020; 96:981-997. [PMID: 32191817 DOI: 10.1111/php.13262] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 02/21/2020] [Indexed: 12/22/2022]
Abstract
This systematic review analyzed the light parameters and the effects of photobiomodulation therapy (PBMT) through low-level laser therapy (LLLT) and/or LED (light-emitting diode) on tendon repair of rats submitted to calcaneal injury. This study was conducted in accordance with the guidelines of the Preferred Reporting Items for Meta-Analysis, and PubMed and MEDLINE databases were accessed to search eligible studies published in English. The search terms were as follows: "Achilles tendon" or "Calcaneal tendon" or "tendon injuries" or "soft tissue injuries" and "tendinopathy" or "tendinitis" and "low-level light therapy" or "low-level laser therapy" or "low intensity power therapy" or "light-emitting diode" or photobiomodulation." The SYRCLE (SYstematic Review Center for Laboratory animal Experimentation) risks of bias was used to assess the risk of bias for selected studies. A total of 225 studies were found based on the descriptors used, and only 33 studies were eligible. Light parameters identified per point of irradiation were approximately 60 mW (continuous mode at infrared spectra), 2 W cm-2 , 2 J and 45 J cm-2 . Light parameters at red spectra, continuous versus pulsed mode, and PBMT combined or compared with other therapies such as ultrasound, and studies using unhealthy rats (ovariectomized and/or diabetic models) were also identified and grouped according to these similarities. The main effects found were decreased inflammatory markers and signs of inflammatory process. PBMT (laser/LED) has positive effects in reducing the inflammatory and time for tissue repair in animal models of tendon injury and/or tendinitis using parameters identified.
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Affiliation(s)
- Rauena Souto Diogo Lopes Silva
- Health Sciences Center, Universidade Estadual do Piaui, Teresina, Brazil.,Post-graduation program in Biomedical Engineering, Universidade Brasil, Sao Paulo, Brazil
| | | | | | | | | | - Cleber Ferraresi
- Post-graduation program in Biomedical Engineering, Universidade Brasil, Sao Paulo, Brazil
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Bhawal UK, Yoshida K, Kurita T, Suzuki M, Okada Y, Tewari N, Oka S, Kuboyama N, Hiratsuka K. Effects of 830 nm low-power laser irradiation on body weight gain and inflammatory cytokines in experimental diabetes in different animal models. Laser Ther 2019; 28:257-265. [PMID: 32255917 PMCID: PMC7087339 DOI: 10.5978/islsm.19-or-17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 11/19/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND AIMS The present investigation was carried out to determine the levels of blood serum components and inflammatory cytokines in diabetic rat models [Goto-Kakizaki (GK), Zucker, and streptozotocin (STZ)-induced Sprague Dawley (SD) rats] which underwent abdominal Low-Power Laser Irradiation (LPLI) and compare them with non-irradiated controls. METHODS The animals were subdivided into the following groups: diabetic control rats (GK, Zucker, STZ) and diabetic rats treated with LPLI (GK + LPLI, Zucker + LPLI, and STZ + LPLI) (n = 7). The animals were irradiated three times weekly for 12 weeks in LPLI (830 nm) at a dose of 5 J/cm2 for 500 s. RESULTS Body weight was significantly lowered in the Zucker- LPLI group compared to control at 10 weeks and this pattern was maintained until 12 weeks of age. TNF-α, IL-1I and IL-6 levels were significantly decreased (5.1 ± 1.1 vs 3.3 ± 0.5, p < 0.01; 43.6 ± 8.8 vs 27.1 ± 3.8, p < 0.01; 98.3 ± 15.8 vs 62.2 ± 12.1, p < 0.01) in the Zucker- LPLI group compared with the control rats. The small intestinal transit rates of charcoal meals were significantly decreased (58.1 ± 10.1 vs 73.4 ± 13.3, p < 0.05) in the Zucker-LPLI group compared with the control rats. Similarly, the serum levels of glucose, cholesterol and triglycerides of LPLI groups were decreased in comparison with that of diabetic control rats. CONCLUSIONS We suggest that abdominal LPLI can reduce body weight and LPLI could be applicable for use against diabetic-induced inflammatory factors.
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Affiliation(s)
- Ujjal K. Bhawal
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Kiyomi Yoshida
- Department of Anesthesiology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Takashi Kurita
- Department of Histology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Masatoshi Suzuki
- Department of Anesthesiology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Yuichiro Okada
- Department of Histology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Nitesh Tewari
- Division of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - Shunichi Oka
- Department of Anesthesiology, Nihon University School of Dentistry, Tokyo, Japan
| | - Noboru Kuboyama
- Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | - Koichiro Hiratsuka
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
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Friedrichsdorf SP, Chavez VEA, Bradaschia-Correa V, Cattaneo PM, Dominguez GC. Infrared Light-Emitting Diode (LED) Effects on Orthodontic Tooth Movement. Braz Dent J 2019; 30:410-416. [PMID: 31340233 DOI: 10.1590/0103-6440201902416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 03/25/2019] [Indexed: 01/13/2023] Open
Abstract
The present study aimed to analyze the effect of LED phototherapy on the presence of hyalinization and root resorption during orthodontic tooth movement (OTM) in rats and to measure the amount of tooth movement. Eighty rats were allocated into two groups: LED and control (CON), where the LED rats were irradiated with infrared LED (850 nm, 30 mW) for 5 min during the first five days of OTM and where controls were not irradiated. Both groups were subdivided into four subgroups (n=10) according to the date of euthanasia (4, 7, 14 and 21 days). Five out of ten LED21 and five of ten CON21 rats were submitted to micro-computed tomography (μCT); μCT scans were taken on days 0, 7, 14 and 21. For histological study, maxillae were processed to light microscopy using Hematoxylin-Eosin (HE) and Tartrate-Resistant Acid Phosphatase (TRAP) histochemistry. The amount of tooth movement did not differ between LED and CON. Hyalinization was observed at the pressure areas in both groups, and it did not show a statistically significant difference between the groups. Root resorption was also observed in both groups after 7 days and it did not represent any differences between the two groups. LED phototherapy was not able to increase the amount of OTM. Similar characteristics of hyalinization and root resorption were observed in both groups.
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Affiliation(s)
- Simone Peixe Friedrichsdorf
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, USP - Universidade de São Paulo, SP, Brazil
| | - Victor Elias Arana Chavez
- Department of Biomaterials and Oral Biology, School of Dentistry, USP - Universidade de São Paulo, SP, Brazil
| | - Vivian Bradaschia-Correa
- Department of Biomaterials and Oral Biology, School of Dentistry, USP - Universidade de São Paulo, SP, Brazil
| | | | - Gladys Cristina Dominguez
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, USP - Universidade de São Paulo, SP, Brazil
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Friedrichsdorf SP, Zaniboni E, Simões A, Arana-Chavez VE, Dominguez GC. Phototherapy is unable to exert beneficial effects on orthodontic tooth movement in rat molars. Angle Orthod 2019; 89:936-941. [PMID: 30920868 DOI: 10.2319/101518-745.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To investigate the effects of irradiation lasers and light-emitting diode (LED) light on root resorption in rat molars during orthodontic tooth movement (OTM). MATERIALS AND METHODS Twenty-one 12-week-old Wistar male rats were divided into three groups: OTM only (control [CG]), OTM and LED irradiation (DG), and OTM and low laser irradiation therapy (LG). The distance between the first and second molars was used to evaluate the amount of tooth movement. The mesial surfaces of the distopalatal roots were analyzed by scanning electron microscopy, and the area of the resorption was calculated. RESULTS Statistical analysis showed a decreased amount of tooth movement in the exposed DG or LG compared with CG, which was statistically significant (P = .031 and P = .004, respectively). However, when the DG and LG groups were compared, no statistically significant differences were found (P = .504). The root resorption areas were similar between CG and DG. However, statistically significant differences were found between LG and CG (P = .014) and LG and DG (P = .038). CONCLUSIONS Phototherapy did not enhance tooth movement, while infrared laser irradiation did increase root resorption.
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da Silva PAV, Dos Anjos LMJ, Abduch TF, Pereira R, da Fonseca ADS, de Paoli F. Photobiomodulation can alter mRNA levels cell death-related. Lasers Med Sci 2019; 34:1373-1380. [DOI: 10.1007/s10103-019-02732-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Accepted: 01/21/2019] [Indexed: 11/27/2022]
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Effects of Therapy with Light Emitting Diode (LED) in the Calcaneal Tendon Lesions of Rats: A Literature Review. ScientificWorldJournal 2019; 2019:6043019. [PMID: 30853864 PMCID: PMC6377949 DOI: 10.1155/2019/6043019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 12/13/2018] [Indexed: 12/23/2022] Open
Abstract
The objective of this review was to analyze original articles about the effects of therapy with LED in experimental models of calcaneal tendon lesions of rats. The search was performed in the period from February to May 2018, in the following electronic databases: MEDLINE, SciELO, and LILACS, besides the Google Scholar, using the descriptors “Achilles tendon”, “Rats”, “LED”, “Tendinopathy”, and “Low-level Light Therapy”, as well as their matching parts in the Portuguese and Spanish languages, related to and in association with the relevant terms to the content sought. From the descriptors used 215 works were found. After application of eligibility criteria 8 works were selected, in which positive results were found after the application of the LED. Regarding the main results found with phototherapy, we observed a significant reduction in inflammation. Only one article mentioned little reduction of inflammation. In relation to the number of sessions, there was wide variation, with an average of approximately 5 sessions every 24 hours. Studies in this review pointed out, therefore, positive results in the repair of the calcaneal tendon after therapy with irradiation LED; however, carrying out more experimental studies that help the standardization of parameters to be used in this therapy for further clinical studies becomes necessary.
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Mussttaf RA, Jenkins DFL, Jha AN. Assessing the impact of low level laser therapy (LLLT) on biological systems: a review. Int J Radiat Biol 2019; 95:120-143. [DOI: 10.1080/09553002.2019.1524944] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Ruwaidah A. Mussttaf
- School of Computing, Electronics and Mathematics, University of Plymouth, Plymouth, UK
| | - David F. L. Jenkins
- School of Computing, Electronics and Mathematics, University of Plymouth, Plymouth, UK
| | - Awadhesh N. Jha
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
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Huang YC, Lei KF, Liaw JW, Tsai SW. The influence of laser intensity activated plasmonic gold nanoparticle-generated photothermal effects on cellular morphology and viability: a real-time, long-term tracking and monitoring system. Photochem Photobiol Sci 2019; 18:1419-1429. [PMID: 30946422 DOI: 10.1039/c9pp00054b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this study, a microfluidic apparatus embedded with microstructures was designed and aligned with a laser and dark-field microscope for real-time, long-term observation of photothermal effects on cells. Gold nanorods (AuNRs, 10 ppm) were incubated with MG-63 human osteosarcoma cells for 3 h. Then, the cells were exposed to a continuous-wave laser at a wavelength of 830 nm for 10, 20, and 30 min at 5, 9, 14, 24, and 32 W cm-2. Subsequent changes in morphology were observed. Under different conditions, cell membrane blebbing occurred at different times, indicating that actin filaments were destroyed in large quantities and apoptosis was induced. In suitable conditions, we first induced slight cell injury by causing cytoskeletal fractures with a high-energy laser; then, the cells were irradiated with a low-energy laser at 0.3 W cm-2. We found that among cells treated with the high-energy laser, cells treated additionally with a low-energy laser showed extended viability compared with cells that did not receive the additional treatment.
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Affiliation(s)
- Yu-Chieh Huang
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taiwan.
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Effect of light-emitting diodes, platelet-rich plasma, and their combination on the activity of sheep tenocytes. Lasers Med Sci 2018; 34:759-766. [PMID: 30317401 DOI: 10.1007/s10103-018-2657-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 10/01/2018] [Indexed: 01/26/2023]
Abstract
Healthy tendons play an important role in joint movements and subjected to a group of pathologies called tendinopathy due to multiple factors. Tendons have a slowly repairing process due to the low vascularity and cellularity. Treatment options aimed at potentiating the healing response and relieving symptoms. Phototherapy and platelet-rich plasma were novel treatment modalities in tendons based on photobiomodulation and growth factors during healing, and the results were encouraging suggesting calibrating treatment parameters. This study utilizes cell culture to explore the potential effect of light-emitting diode and/or growth factors in the form of platelet-rich plasma (PRP) on the activity of tenocytes isolated from sheep Achilles tendons by measuring the cell metabolism and cell mobility using cell viability and migration assays to proof safety and confirm activity. Results showed that sheep tenocyte-cultured groups treated with 5% platelet-rich plasma alone or combined with 4 J/cm2 light-emitting diode have increased viability significantly when compared to control group after a 48 h, while light-emitting diode treatment has not decreased cell migration significantly when compared with control. Result suggests that using platelet-rich plasma alone or combined with light-emitting diode might have potential to enhance healing response at the conditions applied. PRP could enhance proliferation while LED could enhance migration and proliferation. Further research is needed at longer durations.
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Red light-emitting diode irradiation regulates oxidative stress and inflammation through SPHK1/NF-κB activation in human keratinocytes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 186:31-40. [DOI: 10.1016/j.jphotobiol.2018.05.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/10/2018] [Accepted: 05/18/2018] [Indexed: 12/21/2022]
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Abstract
Photobiomodulation or low-level light therapy (LLLT) has extensive applications based on light-induced effects in biological systems. Photobiomodulation remains controversial because of a poorly understood biochemical mechanism limited by the well-known biphasic dose response or Arndt-Schulz curve. The Arndt-Schulz curve states that an optimal dose of light is a key factor for realizing a therapeutic effect. In this report, we demonstrate a tunable optical system for photobiomodulation to aid physicians in overcoming the constraints of light due to biphasic dose response. The tunable optical system is based on a white light-emitting diode and four liquid crystal (LC) photonic devices: three LC phase retarders, and one LC lens. The output light of the tunable optical system exhibits electrical tunability for the wavelength, energy density and beam size. The operating principle is introduced, and the experimental results are presented. The proposed concept can be further extended to other electrically tunable photonic devices for different clinical purposes for photobiomodulation.
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Photobiomodulation Therapy Improves Acute Inflammatory Response in Mice: the Role of Cannabinoid Receptors/ATP-Sensitive K+ Channel/p38-MAPK Signalling Pathway. Mol Neurobiol 2017; 55:5580-5593. [DOI: 10.1007/s12035-017-0792-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 09/26/2017] [Indexed: 01/10/2023]
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Dong J, Xiong D. Applications of Light Emitting Diodes in Health Care. Ann Biomed Eng 2017; 45:2509-2523. [PMID: 28948402 DOI: 10.1007/s10439-017-1930-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 09/16/2017] [Indexed: 12/28/2022]
Abstract
Light emitting diodes (LEDs) have become the main light sources for general lighting, due to their high lumen efficiency and long life time. Moreover, their high bandwidth and the availability of diverse wavelength contents ranging from ultraviolet to infrared empower them with great controllability in tuning brightness, pulse durations and spectra. These parameters are the essential ingredients of the applications in medical imaging and therapies. Despite the fast advances in both LED technologies and their applications, few reviews have been seen to link the controllable emission properties of LEDs to these applications. The objective of this paper is to bridge this gap by reviewing the main control techniques of LEDs that enable creating enhanced lighting patterns for imaging and generating effective photon doses for photobiomodulation. This paper also provides the basic mechanisms behind the effective LED therapies in treating cutaneous and neurological diseases. The emerging field of optogenetics is also discussed with a focus on the application of LEDs. The multidisciplinary topics reviewed in this paper can help the researchers in LEDs, imaging, light therapy and optogenetics better understand the basic principles in each other's field; and hence to stimulate the application of LEDs in health care.
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Affiliation(s)
- Jianfei Dong
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, China.
| | - Daxi Xiong
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, China
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Lee SY, Chieh HF, Lin CJ, Jou IM, Sun YN, Kuo LC, Wu PT, Su FC. Characteristics of Sonography in a Rat Achilles Tendinopathy Model: Possible Non-invasive Predictors of Biomechanics. Sci Rep 2017; 7:5100. [PMID: 28698601 PMCID: PMC5506063 DOI: 10.1038/s41598-017-05466-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 05/31/2017] [Indexed: 12/21/2022] Open
Abstract
The purpose of this study was to investigate the dynamic changes of histopathology, biomechanical properties, echo intensity, and ultrasound features in a collagenase-induced tendinopathy model of rat Achilles tendons, and to examine the associations among biomechanical properties, echo intensity, and ultrasound features. Forty-two rats received an ultrasound-guided collagenase injection on their left Achilles tendons, and needle puncture on the right ones as the control. At four, eight, and twelve weeks post-injury, the tendons were examined via measurements of their biomechanical properties, histopathological and ultrasonographic characteristics. The injured tendons showed significantly higher histopathological scores, lower Young’s modulus, and higher ultrasound feature scores than the those of control ones throughout the study period. Up to week 12, all injured tendons showed defective healing. The neovascularization score had a significant negative linear association with the failure stress and Young’s modulus. Maximum normalized echo intensity had a significant positive linear association with maximum strain. Therefore, neovascularization and maximum normalized echo intensity are associated with mechanically altered tendinopathic tendons. Non-invasive ultrasound methodology, including echo intensity and ultrasound feature scores, may provide useful information about biomechanical properties of tendinopathic tendons.
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Affiliation(s)
- Su-Ya Lee
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Hsiao-Feng Chieh
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.,Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan
| | - Chien-Ju Lin
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.,Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan
| | - I-Ming Jou
- Department of Orthopedics, E-Da Hospital, Kaohsiung, Taiwan.,Department of Orthopedics, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yung-Nien Sun
- Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan.,Department of Computer Science & Information Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Li-Chieh Kuo
- Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan.,Department of Occupational Therapy, National Cheng Kung University, Tainan, Taiwan
| | - Po-Ting Wu
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan. .,Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan. .,Department of Orthopedics, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| | - Fong-Chin Su
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan. .,Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan.
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The Antinociceptive Effect of Light-Emitting Diode Irradiation on Incised Wounds Is Correlated with Changes in Cyclooxygenase 2 Activity, Prostaglandin E2, and Proinflammatory Cytokines. Pain Res Manag 2017; 2017:4792489. [PMID: 28469528 PMCID: PMC5392408 DOI: 10.1155/2017/4792489] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 03/02/2017] [Indexed: 02/02/2023]
Abstract
Background. Light-emitting diode (LED) phototherapy has been reported to relieve pain and enhance tissue repair through several mechanisms. However, the analgesic effect of LED on incised wounds has never been examined. Objectives. We examined the analgesic effect of LED therapy on incision pain and the changes in cyclooxygenase 2 (COX-2), prostaglandin E2 (PGE2), and the proinflammatory cytokines interleukin 6 (IL-6), IL-1β, and tumor necrosis factor α (TNF-α). Methods. Rats received LED therapy on incised skin 6 days before incision (L-I group) or 6 days after incision (I-L group) or from 3 days before incision to 3 days after incision (L-I-L group). Behavioral tests and analysis of skin tissue were performed after LED therapy. Results. LED therapy attenuated the decrease in thermal withdrawal latency in all the irradiated groups and the decrease in the mechanical withdrawal threshold in the L-I group only. The expression levels of COX-2, PGE2, and IL-6 were significantly decreased in the three LED-treated groups, whereas IL-1β and TNF-α were significantly decreased only in the L-I group compared with their levels in the I groups (p < 0.05). Conclusions. LED therapy provides an analgesic effect and modifies the expression of COX-2, PGE2, and proinflammatory cytokines in incised skin.
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Carvalho JL, Britto A, de Oliveira APL, Castro-Faria-Neto H, Albertini R, Anatriello E, Aimbire F. Beneficial effect of low-level laser therapy in acute lung injury after i-I/R is dependent on the secretion of IL-10 and independent of the TLR/MyD88 signaling. Lasers Med Sci 2016; 32:305-315. [PMID: 27924419 DOI: 10.1007/s10103-016-2115-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 11/22/2016] [Indexed: 02/05/2023]
Abstract
The use of low-level laser for lung inflammation treatment has been evidenced in animal studies as well as clinical trials. The laser action mechanism seems to involve downregulation of neutrophil chemoattractants and transcription factors. Innate immune responses against microorganisms may be mediated by toll-like receptors (TLR). Intestinal ischemia and reperfusion (i-I/R) lead to bacterial product translocation, such as endotoxin, which consequently activates TLRs leading to intestinal and lung inflammation after gut trauma. Thus, the target of this study was to investigate the role of TLR activation in the laser (660 nm, 30 mW, 67.5 J/cm2, 0.375 mW/cm2, 5.4 J, 180 s, and spot size with 0.08 cm2) effect applied in contact with the skin on axillary lymph node in lung inflammation induced by i-I/R through a signaling adaptor protein known as myeloid differentiation factor 88 (MyD88). It is a quantitative, experimental, and laboratory research using the C57Bl/6 and MyD88-/- mice (n = 6 mice for experimental group). Statistical differences were evaluated by ANOVA and the Tukey-Kramer multiple comparisons test to determine differences among groups. In order to understand how the absence of MyD88 can interfere in the laser effect on lung inflammation, MyD88-/- mice were treated or not with laser and subjected to occlusion of the superior mesenteric artery (45 min) followed by intestinal reperfusion (4 h). In summary, the laser decreased the MPO activity and the lung vascular permeability, thickened the alveolar septa, reduced both the edema and the alveolar hemorrhage, as well as significantly decreased neutrophils infiltration in MyD88-deficient mice as well in wild-type mice. It noted a downregulation in chemokine IL-8 production as well as a cytokine IL-10 upregulation in these animals. The results also evidenced that in absence of IL-10, the laser effect is reversed. Based on these results, we suggest that the beneficial effect of laser in acute lung injury after i-I/R is dependent on the secretion of IL-10 and independent of the TLR/MyD88 signaling.
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Affiliation(s)
- J L Carvalho
- Department of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil
| | - A Britto
- Laboratory of Pulmonary Immunology and Exercise, University Nove de Julho - UNINOVE, São José dos Campos, Brazil
| | - A P Ligeiro de Oliveira
- Laboratory of Pulmonary Immunology and Exercise, University Nove de Julho - UNINOVE, São José dos Campos, Brazil
| | - H Castro-Faria-Neto
- Laboratory of Immunopharmacology, Oswaldo Cruz Foundation - FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - R Albertini
- Department of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil
| | - E Anatriello
- Department of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil
| | - F Aimbire
- Department of Science and Technology, Federal University of São Paulo - UNIFESP, São José dos Campos, SP, Brazil. .,Federal University of São Paulo - UNIFESP, Institute of Science and Technology, Rua Talim, no. 330 - Vila Nair, CEP: 12231-280, São José dos Campos, SP, Brazil.
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Campos L, Cruz ÉP, Pereira FS, Arana-Chavez VE, Simões A. Comparative study among three different phototherapy protocols to treat chemotherapy-induced oral mucositis in hamsters. JOURNAL OF BIOPHOTONICS 2016; 9:1236-1245. [PMID: 27105906 DOI: 10.1002/jbio.201600014] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 04/02/2016] [Accepted: 04/03/2016] [Indexed: 06/05/2023]
Abstract
In this study, clinical, biochemical and histological analysis were used to compare different phototherapies, including LED, low and high-power laser (HPL) for the treatment of chemotherapy (CT)-induced oral mucositis (OM). One-hundred-fifty hamsters were divided into five groups: C: control; CH: CT/OM induction; L: CT/OM induction and treatment with LED (635 nm, 1.2 J), HL: CT/OM induction and treatment with HPL (808 nm, 10 J), LL: CT/OM induction and treatment with low-level laser therapy (LLLT) (660 nm, 1.2 J). OM was induced by scratches performed on check pouch mucosa after two injections of 5-Fluorouracil. The experiment lasted 10 days and OM was analyzed by specific clinical scales on days 5, 7 and 10. The animals were euthanized and the cheek pouch mucosa removed for biochemical (TNF-α concentration) and histological (light microscopy) analysis. After statistical analysis, the authors' results showed LED and LLLT therapies were efficient treatments for OM, decreasing TNF-α concentration on day 7 (p < 0.05) and completely healing the mucosa on day 10. HPL showed no interference in final healing of OM. According to the methodology used and the results obtained in the present study, LLLT and LED therapies were the best choices to decrease the severity of OM, accelerating tissue repair and decreasing the inflammatory process. Clinical evaluation of OM in Groups CH, LL, L and HL and their respective arrangement of phototherapy treatments at different time intervals (5, 7 and 10 days).
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Affiliation(s)
- Luana Campos
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, 05508-000, Brazil
| | - Érika P Cruz
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, 05508-000, Brazil
| | - Filipi S Pereira
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, 05508-000, Brazil
| | - Victor E Arana-Chavez
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, 05508-000, Brazil
| | - Alyne Simões
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, 05508-000, Brazil
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Effect of Topical Administration of Fractions and Isolated Molecules from Plant Extracts on Skin Wound Healing: A Systematic Review of Murine Experimental Models. Mediators Inflamm 2016; 2016:4916068. [PMID: 27829707 PMCID: PMC5086515 DOI: 10.1155/2016/4916068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 06/16/2016] [Indexed: 12/21/2022] Open
Abstract
Background and Purpose. Skin wound healing is a dynamic process driven by molecular events responsible for the morphofunctional repair of the injured tissue. In a systematic review, we analyzed the relevance of plant fractions and isolates on skin wound healing. By revising preclinical investigations with murine models, we investigated if the current evidence could support clinical trials. Methods. Studies were selected in the MEDLINE/PubMed and Scopus databases according to the PRISMA statement. All 32 identified studies were submitted to data extraction and the methodological bias was investigated according to ARRIVE strategy. Results. The studies demonstrated that plant fractions and isolates are able to modulate the inflammatory process during skin wound healing, being also effective in attenuating the oxidative tissue damage in the scar tissue and stimulating cell proliferation, neoangiogenesis, collagen synthesis, granulation tissue expansion, reepithelialization, and the wound closure rate. However, we identified serious methodological flaws in all studies, such as the high level of reporting bias and absence of standardized experimental designs, analytical methods, and outcome measures. Conclusion. Considering these limitations, the current evidence generated from flawed methodological animal studies makes it difficult to determine the relevance of herbal medicines to treat skin wounds and derails conducting clinical studies.
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Lima ACG, Fernandes GA, de Barros Araújo R, Gonzaga IC, de Oliveira RA, Nicolau RA. Photobiomodulation (Laser and LED) on Sternotomy Healing in Hyperglycemic and Normoglycemic Patients Who Underwent Coronary Bypass Surgery with Internal Mammary Artery Grafts: A Randomized, Double-Blind Study with Follow-Up. Photomed Laser Surg 2016; 35:24-31. [PMID: 27564925 DOI: 10.1089/pho.2016.4143] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND AND OBJECTIVE This study aimed at analyzing the healing effects of low-level laser therapy (LLLT) (λ620 nm, 6 J/cm2) and light-emitting diode (LED) therapy (λ640 nm, 6 J/cm2) on the longitudinal sternotomy incisions of hyperglycemic and normoglycemic patients who underwent coronary artery bypass grafting (CABG). MATERIALS AND METHODS 120 volunteers were electively submitted to CABG and were randomly allocated into four different groups of equal size (n = 30): control, placebo, laser (λ of 640 nm and spatial average energy fluency [SAEF] of 1.06 J/cm2), and LED (λ of 660 ± 20 nm and SAEF of 0.24 J/cm2). Laser and LED groups were irradiated from the second to eighth day postsurgery, and sternotomy incision was photographically registered. Then, participants were also separated into hyperglycemic and normoglycemic groups, according to their fasting blood glucose test before surgery. Three researchers blindly analyzed the incision photographs to determine hyperemia and wound closure at the first day of hospital discharge (eighth postoperative day). RESULTS LLLT and LED groups had similarly less hyperemia and less incision bleeding or dehiscence (p ≤ 0.005) and the outcomes were also analogous between hyperglycemic and normoglycemic patients, which indicates no difference observed in an intragroup analysis (p ≥ 0.05). CONCLUSIONS With the present therapy parameters, it may be assumed that both coherent light (laser) and non-coherent light (LED) are effective in promoting sternotomy and healing acceleration, which are evident on the eighth day postsurgery.
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Affiliation(s)
- Andréa Conceição Gomes Lima
- 1 Lasertherapy and Photobiology Center, Research and Development Institute, IP&D, Universidade do Vale do Paraíba , UNIVAP, São Paulo, Brazil .,2 University of Piauí State (UESPI) , Teresina, Brazil
| | - Gilderlene Alves Fernandes
- 1 Lasertherapy and Photobiology Center, Research and Development Institute, IP&D, Universidade do Vale do Paraíba , UNIVAP, São Paulo, Brazil .,3 Uninovafapi College , Teresina, Brazil
| | - Raimundo de Barros Araújo
- 4 Department of Cardiac Surgery, Santa Maria Hospital, University of Piauí State (UESPI) , Teresina, Brazil
| | - Isabel Clarisse Gonzaga
- 1 Lasertherapy and Photobiology Center, Research and Development Institute, IP&D, Universidade do Vale do Paraíba , UNIVAP, São Paulo, Brazil .,3 Uninovafapi College , Teresina, Brazil
| | - Rauirys Alencar de Oliveira
- 3 Uninovafapi College , Teresina, Brazil .,5 Department of Health Sciences, University of Piauí State (UESPI) , Teresina, Brazil
| | - Renata Amadei Nicolau
- 1 Lasertherapy and Photobiology Center, Research and Development Institute, IP&D, Universidade do Vale do Paraíba , UNIVAP, São Paulo, Brazil
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Martins D, Turnes B, Cidral-Filho F, Bobinski F, Rosas R, Danielski L, Petronilho F, Santos A. Light-emitting diode therapy reduces persistent inflammatory pain: Role of interleukin 10 and antioxidant enzymes. Neuroscience 2016; 324:485-95. [DOI: 10.1016/j.neuroscience.2016.03.035] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 03/11/2016] [Accepted: 03/14/2016] [Indexed: 11/28/2022]
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Lima ACG, Fernandes GA, Gonzaga IC, de Barros Araújo R, de Oliveira RA, Nicolau RA. Low-Level Laser and Light-Emitting Diode Therapy for Pain Control in Hyperglycemic and Normoglycemic Patients Who Underwent Coronary Bypass Surgery with Internal Mammary Artery Grafts: A Randomized, Double-Blind Study with Follow-Up. Photomed Laser Surg 2016; 34:244-51. [PMID: 27081873 DOI: 10.1089/pho.2015.4049] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE This study aimed to evaluate the efficacy of low-level laser therapy (LLLT) and light-emitting diodes (LEDs) for reducing pain in hyperglycemic and normoglycemic patients who underwent coronary artery bypass surgery with internal mammary artery grafts. METHODS This study was conducted on 120 volunteers who underwent elective coronary artery bypass graft (CABG) surgery. The volunteers were randomly allocated to four different groups of equal size (n = 30): control, placebo, LLLT [λ = 640 nm and spatial average energy fluence (SAEF) = 1.06 J/cm(2)], and LED (λ = 660 ± 20 nm and SAEF = 0.24 J/cm(2)). Participants were also divided into hyperglycemic and normoglycemic subgroups, according to their fasting blood glucose test result before surgery. The outcome assessed was pain during coughing by a visual analog scale (VAS) and the McGill Pain Questionnaire. RESULTS The patients were followed for 1 month after the surgery. The LLLT and LED groups showed a greater decrease in pain, with similar results, as indicated by both the VAS and the McGill questionnaire (p ≤ 0.05), on the 6th and 8th postoperative day compared with the placebo and control groups. The outcomes were also similar between hyperglycemic and normoglycemic patients. One month after the surgery, almost no individual reported pain during coughing. CONCLUSIONS LLLT and LED had similar analgesic effects in hyperglycemic and normoglycemic patients, better than placebo and control groups.
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Affiliation(s)
- Andréa Conceição Gomes Lima
- 1 Lasertherapy and Photobiology Center, Research and Development Institute , IP&D Universidade do Vale do Paraíba, UNIVAP, São Paulo, Brazil .,2 University of Piauí State (UESPI) , Center of Health Sciences, Teresina, Piauí, Brazil
| | - Gilderlene Alves Fernandes
- 1 Lasertherapy and Photobiology Center, Research and Development Institute , IP&D Universidade do Vale do Paraíba, UNIVAP, São Paulo, Brazil .,3 Uninovafapi College , Department of Physical Therapy, Teresina, Piauí, Brazil
| | - Isabel Clarisse Gonzaga
- 1 Lasertherapy and Photobiology Center, Research and Development Institute , IP&D Universidade do Vale do Paraíba, UNIVAP, São Paulo, Brazil .,3 Uninovafapi College , Department of Physical Therapy, Teresina, Piauí, Brazil
| | - Raimundo de Barros Araújo
- 4 Department of Cardiac Surgery, Santa Maria Hospital, University of Piauí State (UESPI) , Teresina, Piauí, Brazil
| | - Rauirys Alencar de Oliveira
- 2 University of Piauí State (UESPI) , Center of Health Sciences, Teresina, Piauí, Brazil .,3 Uninovafapi College , Department of Physical Therapy, Teresina, Piauí, Brazil
| | - Renata Amadei Nicolau
- 1 Lasertherapy and Photobiology Center, Research and Development Institute , IP&D Universidade do Vale do Paraíba, UNIVAP, São Paulo, Brazil
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Souza MVD, Silva MOD. LASERTERAPIA EM AFECÇÕES LOCOMOTORAS: REVISÃO SISTEMÁTICA DE ESTUDOS EXPERIMENTAIS. REV BRAS MED ESPORTE 2016. [DOI: 10.1590/1517-869220162201144326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
RESUMO Introdução: Ao longo dos anos a fisioterapia tem contribuído para o tratamento das lesões musculotendíneas e osteoarticulares pela utilização de diversos recursos eletrotermofototerapêuticos como, por exemplo, o laser de baixa potência. Objetivo: A finalidade desse estudo foi identificar mediante revisão sistemática, o efeito da laserterapia de baixa potência em afecções do sistema locomotor de ratos, com destaque para a dose de energia e o comprimento de onda utilizado, assim como para a resposta ao tratamento. Métodos: Foram consultadas as bases de dados Medline, Lilacs, PEDro e SciELO, entre janeiro de 2005 a maio de 2013, utilizando os termos "tendinopathy", "laser therapy", "rats", "tendon", "muscle", "bone", "low-level laser therapy", assim como "tendinopatia", "laserterapia", "ratos", "tendão", "músculo", "osso" e "laser de baixa potência". Apenas foram incluídos estudos experimentais publicados nos idiomas português e inglês, que induziram lesão em tendões, músculos, ossos e/ou articulação, tratada com laserterapia, associada ou não a outros tratamentos. Resultados: Foi encontrado um total de 30 estudos experimentais nas bases de dados consultadas, dos quais 15 (50%) foram realizados em tendão, 10 (33,33%) em músculo e cinco (16,66%) em osso e/ou articulação. As doses de energia mais comumente utilizadas foram de 3 J (26,66%) e 1 J (16,66%). Já os comprimentos de onda foram de 904 nm (21,21%) e 830 nm (21,21%). Conclusão: A informação mais expressiva obtida com a terapia foi a diminuição da resposta inflamatória (36,66%) em lesões ortopédicas agudas.
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Helrigle C, de Carvalho PDC, Casalechi HL, Leal-Junior ECP, Fernandes GHC, Helrigel PA, Rabelo RL, de Oliveira Aleixo-Junior I, Aimbire F, Albertini R. Effects of low-intensity non-coherent light therapy on the inflammatory process in the calcaneal tendon of ovariectomized rats. Lasers Med Sci 2015; 31:33-40. [PMID: 26507001 DOI: 10.1007/s10103-015-1821-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 10/13/2015] [Indexed: 12/21/2022]
Abstract
The aim of this experimental study was to investigate the effects of low-intensity light-emitting diode (LED) phototherapy on the inflammatory process in the calcaneal tendon of ovariectomized rats (OVX) through the involvement of the inflammatory mediators interleukin (IL)-6, IL-10, and tumor necrosis factor-alpha (TNF-α). Thirty-five female Wistar rats were divided into 4 groups: 3 groups of OVX rats totaling 30 rats (untreated OVX rats [OVX injury group], treated OVX rats [OVX LED group], and control OVX rats; subgroups existed based on the sampling times, which were 3, 7, and 14 days) and 1 group of non-OVX rats (not OVX; n = 5). Tendon injury was induced by trauma using a 208-g mass placed at 20 cm from the right tendon of each animal with energy of 0.70 J. The animals were treated 12 h after tendonitis with LED therapy and every 48 h thereafter until euthanasia (at 3, 7, or 14 days). The tendons were dissected and stored in liquid nitrogen at -196 °C, thawed only at the time of immunoenzymatic testing (ELISA). Groups treated with LED showed a decrease in the number of pro-inflammatory cells, IL-6, and TNF-α (p <0.05), and an increase in IL-10 (p < 0.05) when compared to the not OVX group (p < 0.05). It was concluded that low-intensity LED treatment using the parameters and wavelength of 945 nm in the time periods studied reduced the release of IL-6 and TNF-α and increased the release of IL-10, thereby improving the inflammatory response in OVX rats.
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Affiliation(s)
- Carla Helrigle
- Post-graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, UNINOVE, São Paulo, SP, Brazil
| | - Paulo deTarso Camilo de Carvalho
- Post-graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, UNINOVE, São Paulo, SP, Brazil. .,Post-graduation Program in Rehabilitation Sciences, Universidade Nove de Julho, UNINOVE, Rua Vergueiro, 235, 01504-001, São Paulo, SP, Brazil.
| | - Heliodora Leão Casalechi
- Post-graduation Program in Rehabilitation Sciences, Universidade Nove de Julho, UNINOVE, Rua Vergueiro, 235, 01504-001, São Paulo, SP, Brazil
| | - Ernesto Cesar Pinto Leal-Junior
- Post-graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, UNINOVE, São Paulo, SP, Brazil.,Post-graduation Program in Rehabilitation Sciences, Universidade Nove de Julho, UNINOVE, Rua Vergueiro, 235, 01504-001, São Paulo, SP, Brazil
| | | | | | - Rogério Leão Rabelo
- Medical Veterinary Department, Federal University of Goiás-UFG, Jataí, GO, Brazil
| | - Ivo de Oliveira Aleixo-Junior
- Post-graduation Program in Rehabilitation Sciences, Universidade Nove de Julho, UNINOVE, Rua Vergueiro, 235, 01504-001, São Paulo, SP, Brazil
| | - Flavio Aimbire
- Institute of Science and Technology - ICT, Federal University of São Paulo-Unifesp, São José dos Campos, SP, Brazil
| | - Regiane Albertini
- Post-graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, UNINOVE, São Paulo, SP, Brazil.,Post-graduation Program in Rehabilitation Sciences, Universidade Nove de Julho, UNINOVE, Rua Vergueiro, 235, 01504-001, São Paulo, SP, Brazil
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Low Reactive Level Laser Therapy for Mesenchymal Stromal Cells Therapies. Stem Cells Int 2015; 2015:974864. [PMID: 26273309 PMCID: PMC4529981 DOI: 10.1155/2015/974864] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 03/14/2015] [Indexed: 12/24/2022] Open
Abstract
Low reactive level laser therapy (LLLT) is mainly focused on the activation of intracellular or extracellular chromophore and the initiation of cellular signaling by using low power lasers. Over the past forty years, it was realized that the laser therapy had the potential to improve wound healing and reduce pain and inflammation. In recent years, the term LLLT has become widely recognized in the field of regenerative medicine. In this review, we will describe the mechanisms of action of LLLT at a cellular level and introduce the application to mesenchymal stem cells and mesenchymal stromal cells (MSCs) therapies. Finally, our recent research results that LLLT enhanced the MSCs differentiation to osteoblast will also be described.
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Ashrafzadeh Takhtfooladi M, Ashrafzadeh Takhtfooladi H, Sedaghatfar H, Shabani S. Effect of low-level laser therapy on lung injury induced by hindlimb ischemia/reperfusion in rats. Lasers Med Sci 2015; 30:1757-62. [PMID: 26155904 DOI: 10.1007/s10103-015-1786-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 06/30/2015] [Indexed: 01/14/2023]
Abstract
To investigate the effect of low-level laser therapy (LLLT 650 nm) on the lung remote organ injury induced by hindlimb ischemia/reperfusion (I/R). The experiments were performed on 50 healthy mature male Wistar rats weighing mean 230 ± 20 g. The rats were randomly allocated into five equal groups as follows: normal group (animals nonmanipulated), sham group (operated with no ischemia), laser group (animals nonmanipulated and irradiated with laser), I/R group, and I/R + LLLT group. Rats were prepared for sterile surgery, and then, right hindlimbs were subjected to I/R induced by the femoral artery occlusion for duration of 120 min, followed by a 60-min reperfusion. The LLLT (K30 handheld probe, AZOR, Technica, Russia, 650 nm, 30 mW, surface area = 1 cm(2), 60 S/cm(2), energy density = 1.8 J/cm(2)) was carried out by irradiating the rats over a unique point on the skin over the right upper bronchus for 5 and 15 min after initiating reperfusion for 3 min. At the end of the trial, rats were euthanized under deep anesthesia and the right lung tissues were removed. Myeloperoxidase (MPO) and superoxide dismutase (SOD) activities and nitric oxide (NO), malondialdehyde (MDA), and glutathione (GSH) levels were measured in the lung tissues. The tissue samples were further examined histopathologically under light microscopy. It was found that I/R elevated MPO activity, MDA, and NO levels accompanied by a reduction in SOD activities and GSH levels (P < 0.05). LLLT restored MDA and NO levels, MPO and SOD activity, GSH levels, and lung injury scores (P < 0.05). In light of these findings, the LLLT has alleviated the lung tissue injuries after skeletal muscle I/R in this experimental model.
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Ointment of Brassica oleracea var. capitata Matures the Extracellular Matrix in Skin Wounds of Wistar Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:919342. [PMID: 26170889 PMCID: PMC4481082 DOI: 10.1155/2015/919342] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 05/17/2015] [Accepted: 05/19/2015] [Indexed: 12/19/2022]
Abstract
Wound healing is a complex process that aims to restore damaged tissue. Phytotherapeutics, such as cabbage, Brassica oleracea var. capitata (Brassicaceae), and sunflower, Helianthus annuus L. (Asteraceae) oil, are used as wound healers. Five circular wounds, each 12 mm in diameter, were made in the dorsolateral region of each rat. The animals were divided into four groups: balsam (B. oleracea); ointment (B. oleracea); sunflower oil (Helianthus annuus); control (saline solution 0.9%). These products were applied daily for 20 days and every four days the tissues of different wounds were removed. The wound contraction area, total collagen, types I and III collagen, glycosaminoglycans, and tissue cellularity were analyzed. In the groups that received ointment and balsam there was reduction in the wound area on days 4, 8, 12, and 20. Throughout the trial period, the balsam and ointment groups showed a higher amount of total collagen, type I collagen, and glycosaminoglycan compared to the others groups. The rats in the groups treated with B. oleracea var. capitata showed a higher number of cells on days 8, 16, and 20. B. oleracea was effective in stimulating the maturation of collagen and increasing the cellularity, as also in improving the mechanical resistance of the newly formed tissue.
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de Castro ICV, Rosa CB, Carvalho CM, Aragão JS, Cangussu MCT, Dos Santos JN, Pinheiro ALB. Assessment of different energy delivery settings in laser and LED phototherapies in the inflammatory process of rat's TMJ induced by carrageenan. Lasers Med Sci 2015; 30:2105-13. [PMID: 25854994 DOI: 10.1007/s10103-015-1748-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 03/19/2015] [Indexed: 12/17/2022]
Abstract
Temporomandibular disorders (TMDs) are mostly inflammatory conditions widespread in the population. Previous studies have shown positive effects of either laser or light-emitting diode (LED) phototherapies on treating TMDs, but their action and mechanism in the inflammatory infiltrate of the temporomandibular joint are still poorly understood. The aim of this study was to assess, through histological analysis, the effectiveness of using laser light (λ 780 nm, 70 mW, continous wave (CW), 10 J) and LED (λ 850 ± 10 nm, 100 mW, CW, 10 J) on the inflammation of the temporomandibular joint of rats induced by carrageenan. Forty-five animals were divided into three groups with five animals each according to the experimental times of 2, 3, and 7 days: inflammation, inflammation+laser phototherapy, and inflammation+LED phototherapy. The first irradiation was performed 24 h after induction with an interval of 48 h between sessions. After animal death, specimens were processed and stained with hematoxylin-eosin (HE) and picrosirius. Then, the samples were examined histologically. Data were statistically analyzed. The inflammation group showed mild to moderate chronic inflammatory infiltrate between bone trabecules of the condyle. Over the time course of the study in the laser group, the region of the condyle presented mild chronic inflammation and intense vascularization. In the LED group, the condyle showed aspects of normality and absence of inflammation in some specimens. In all the time points, the laser-irradiated groups showed greater amount of collagen deposition in the condyle (p = 0.04) and in the disc (p = 0.03) when compared to the inflammation and LED groups, respectively. Laser- and LED-treated groups demonstrate a smaller number of layers of the synovial membrane when compared to the non-irradiated groups. It was concluded that, in general, laser and LED phototherapies resulted in a reduction of inflammatory infiltrate in the temporomandibular joint of rat.
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Affiliation(s)
- Isabele C V de Castro
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, Av. Araújo Pinho, 62, Canela, Salvador, BA, CEP 40110-150, Brazil.
| | - Cristiane B Rosa
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, Av. Araújo Pinho, 62, Canela, Salvador, BA, CEP 40110-150, Brazil.
| | - Carolina M Carvalho
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, Av. Araújo Pinho, 62, Canela, Salvador, BA, CEP 40110-150, Brazil.
| | - Juliana S Aragão
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, Av. Araújo Pinho, 62, Canela, Salvador, BA, CEP 40110-150, Brazil.
| | - Maria Cristina T Cangussu
- Dental Public Health, School of Dentistry, Federal University of Bahia, Av. Araújo Pinho, 62, Canela, Salvador, BA, CEP 40110-150, Brazil.
| | - Jean N Dos Santos
- Oral Pathology School of Dentistry, Federal University of Bahia, Av. Araújo Pinho, 62, Canela, Salvador, BA, 40110-150, Brazil.
| | - Antonio L B Pinheiro
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, Av. Araújo Pinho, 62, Canela, Salvador, BA, CEP 40110-150, Brazil. .,University of Camilo Castelo Branco Núcleo do Parque Tecnológico de São José dos Campos, Rod. Presidente Dutra Km 139, Eugênio de Melo, São José dos Campos, SP, 12247-004, Brazil. .,National Institute of Optics and Photonics, Physics Institute of São Carlos, University of São Paulo, São Carlos, SP, 13560-970, Brazil.
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Yu Z, Liu N, Zhao J, Li Y, McCarthy TJ, Tedford CE, Lo EH, Wang X. Near infrared radiation rescues mitochondrial dysfunction in cortical neurons after oxygen-glucose deprivation. Metab Brain Dis 2015; 30:491-6. [PMID: 24599760 PMCID: PMC4156924 DOI: 10.1007/s11011-014-9515-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 02/20/2014] [Indexed: 11/25/2022]
Abstract
Near infrared radiation (NIR) is known to penetrate and affect biological systems in multiple ways. Recently, a series of experimental studies suggested that low intensity NIR may protect neuronal cells against a wide range of insults that mimic diseases such as stroke, brain trauma and neurodegeneration. However, the potential molecular mechanisms of neuroprotection with NIR remain poorly defined. In this study, we tested the hypothesis that low intensity NIR may attenuate hypoxia/ischemia-induced mitochondrial dysfunction in neurons. Primary cortical mouse neuronal cultures were subjected to 4 h oxygen-glucose deprivation followed by reoxygenation for 2 h, neurons were then treated with a 2 min exposure to 810-nm NIR. Mitochondrial function markers including MTT reduction and mitochondria membrane potential were measured at 2 h after treatment. Neurotoxicity was quantified 20 h later. Our results showed that 4 h oxygen-glucose deprivation plus 20 h reoxygenation caused 33.8 ± 3.4 % of neuron death, while NIR exposure significantly reduced neuronal death to 23.6 ± 2.9 %. MTT reduction rate was reduced to 75.9 ± 2.7 % by oxygen-glucose deprivation compared to normoxic controls, but NIR exposure significantly rescued MTT reduction to 87.6 ± 4.5 %. Furthermore, after oxygen-glucose deprivation, mitochondria membrane potential was reduced to 48.9 ± 4.39 % of normoxic control, while NIR exposure significantly ameliorated this reduction to 89.6 ± 13.9 % of normoxic control. Finally, NIR significantly rescued OGD-induced ATP production decline at 20 min after NIR. These findings suggest that low intensity NIR can protect neurons against oxygen-glucose deprivation by rescuing mitochondrial function and restoring neuronal energetics.
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Affiliation(s)
- Zhanyang Yu
- Departments of Neurology and Radiology, Neuroprotection Research Laboratory, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, 02129, USA,
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Park JT, Hong KS. Effect of light-emitting-diode irradiation on the proliferation and migration in human gingival fibroblasts. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-014-9061-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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Kuboyama N, Ohta M, Sato Y, Abiko Y. Anti-inflammatory activities of light emitting diode irradiation on collagen-induced arthritis in mice (a secondary publication). Laser Ther 2014; 23:191-9. [PMID: 25368445 DOI: 10.5978/islsm.14-or-15] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 08/28/2014] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND AIMS Rheumatoid arthritis (RA) is an auto-immune disease afflicting multiple joints of the body, where as a result of the increase in inflammatory cytokines and tissue destructive factors such as matrix metalloproteinase (MMP)-3, deterioration of the bones and cartilages of the joints occurs. The present investigation was carried out to study the anti-inflammatory activities of light emitting diode (LED) irradiation on hind paw inflammation in collagen-induced arthritis (CIA) mice models. MATERIALS AND METHOD RA in the CIA mouse model was induced by immunization of DBA/1J mice with intradermal injections of an emulsion of bovine type II collagen and complete Freund's adjuvant. A total of 20 CIA mice were subdivided into the following groups: control group, CIA group and 2 groups of LED irradiated CIA mice (LED groups) (n=5 per group). The mouse knee joint area in the LED groups (the 570 nm and 940 nm groups) was irradiated with LED energy, three times a week for 500 s per session over 8 weeks at a dose of 5 J/cm(2). The hind paw swelling was assessed by the increase in hind paw thickness. The serum levels of the inflammatory cytokines and arthritic factor MMP-3 were determined with an enzyme-linked immunosorbent assay (ELISA). RESULTS In the LED-570 and LED-940 groups at 4 weeks after arthritis induction, the swelling inhibition index was 18.1±4.9 and 29.3±4.0 respectively. Interleukin (IL)-1β, IL-6 and MMP-3 serum levels were significantly lower in the LED-940 group. CONCLUSIONS LED irradiation, particularly in the near-infrared was effective for inhibition of the inflammatory reactions caused by RA.
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Affiliation(s)
- Noboru Kuboyama
- Department of Pharmacology, Nihon University School of Dentistry at Matsudo ; Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo
| | - Mitsuhiro Ohta
- Department of Oral Diagnosis, Nihon University School of Dentistry at Matsudo ; Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo
| | - Yusuke Sato
- Department of Pharmacology, Nihon University School of Dentistry at Matsudo
| | - Yoshimitsu Abiko
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, ; Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo
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Effects of weekly LED therapy at 625 nm on the treatment of chronic lower ulcers. Lasers Med Sci 2014; 30:367-73. [DOI: 10.1007/s10103-014-1666-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Accepted: 09/22/2014] [Indexed: 12/17/2022]
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Takhtfooladi MA, Shahzamani M, Takhtfooladi HA, Moayer F, Allahverdi A. Effects of light-emitting diode (LED) therapy on skeletal muscle ischemia reperfusion in rats. Lasers Med Sci 2014; 30:311-6. [PMID: 25274196 DOI: 10.1007/s10103-014-1670-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Accepted: 09/24/2014] [Indexed: 11/29/2022]
Abstract
Low-level laser therapy has been shown to decrease ischemia-reperfusion injuries in the skeletal muscle by induction of synthesis of antioxidants and other cytoprotective proteins. Recently, the light-emitting diode (LED) has been used instead of laser for the treatment of various diseases because of its low operational cost compared to the use of a laser. The objective of this work was to analyze the effects of LED therapy at 904 nm on skeletal muscle ischemia-reperfusion injury in rats. Thirty healthy male Wistar rats were allocated into three groups of ten rats each as follows: normal (N), ischemia-reperfusion (IR), and ischemia-reperfusion + LED (IR + LED) therapy. Ischemia was induced by right femoral artery clipping for 2 h followed by 2 h of reperfusion. The IR + LED group received LED irradiation on the right gastrocnemius muscle (4 J/cm(2)) immediately and 1 h following blood supply occlusion for 10 min. At the end of trial, the animals were euthanized and the right gastrocnemius muscles were submitted to histological and histochemical analysis. The extent of muscle damage in the IR + LED group was significantly lower than that in the IR group (P < 0.05). In comparison with other groups, tissue malondialdehyde (MDA) levels in the IR group were significantly increased (P < 0.05). The muscle tissue glutathione (GSH), superoxide dismutases (SOD), and catalase (CAT) levels in the IR group were significantly lower than those in the subjects in other groups. From the histological and histochemical perspective, the LED therapy has alleviated the metabolic injuries in the skeletal muscle ischemia reperfusion in this experimental model.
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de Mattos LHL, Álvarez LEC, Yamada ALM, Hussni CA, Rodrigues CA, Watanabe MJ, Alves ALG. Effect of phototherapy with light-emitting diodes (890 nm) on tendon repair: an experimental model in sheep. Lasers Med Sci 2014; 30:193-201. [DOI: 10.1007/s10103-014-1641-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 08/11/2014] [Indexed: 11/29/2022]
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Abstract
Tendinopathy is a debilitating musculoskeletal
condition which can cause significant pain and lead to complete rupture
of the tendon, which often requires surgical repair. Due in part
to the large spectrum of tendon pathologies, these disorders continue
to be a clinical challenge. Animal models are often used in this
field of research as they offer an attractive framework to examine
the cascade of processes that occur throughout both tendon pathology and
repair. This review discusses the structural, mechanical, and biological
changes that occur throughout tendon pathology in animal models,
as well as strategies for the improvement of tendon healing. Cite this article: Bone Joint Res 2014;3:193–202.
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Affiliation(s)
- M W Hast
- University of Pennsylvania, McKay Orthopaedic Research Laboratory, 424 Stemmler Hall 36th Street and Hamilton Walk, Philadelphia, 19104-6081, USA
| | - A Zuskov
- University of Pennsylvania, McKay Orthopaedic Research Laboratory, 424 Stemmler Hall 36th Street and Hamilton Walk, Philadelphia, 19104-6081, USA
| | - L J Soslowsky
- University of Pennsylvania, McKay Orthopaedic Research Laboratory, 424 Stemmler Hall 36th Street and Hamilton Walk, Philadelphia, 19104-6081, USA
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