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Monteiro KKDS, Tomazoni SS, Albuquerque Pontes GM, Teixeira AM, Agra FADA, Alvim CB, Medeiros Brigato SL, Marcos RL, Dellê H, Serra AJ, Leal-Junior ECP. Effects of Short-, Medium-, and Long-Term Treatment Using Photobiomodulation Therapy Combined with Static Magnetic Field in Aging Rats. Biomedicines 2024; 12:990. [PMID: 38790953 PMCID: PMC11117574 DOI: 10.3390/biomedicines12050990] [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: 02/29/2024] [Revised: 04/05/2024] [Accepted: 04/26/2024] [Indexed: 05/26/2024] Open
Abstract
(1) Background: We investigated the detrimental and protective effects of short-, medium, and long-term treatment with different doses of photobiomodulation therapy combined with static magnetic field (PBMT-sMF) during the aging process. (2) Methods: Rats were treated for 15, 30, and 60 weeks with 1, 3, 10, and 30 J of PBMT-sMF or a placebo control. In addition, eight young rats were not subjected to any procedure or treatment and were euthanized at six weeks old. Skin, muscle, bone, kidney, liver, and blood samples were analyzed. (3) Results: No differences between the groups in the morphology of the skin, muscle, and bone was observed. Glutamic pyruvic transaminase levels were increased in the placebo group after 30 and 60 weeks. Glutamic oxaloacetic transaminase levels were also increased in the placebo group after 30 weeks. An increase in creatinine in the PBMT-sMF 3, 10, and 30 J groups compared with that in the young control group was observed. No significant difference in urea levels between the groups was noted. Vascular endothelial growth factor increased in the PBMT-sMF 10 and 30 J groups after 15 weeks of treatment and in the PBMT-sMF 3 J after 60 weeks. Finally, vascular endothelial growth factor decreased in the PBMT-sMF 30 J group after 30 weeks of treatment. (4) Conclusions: PBMT-sMF did not have detrimental effects on the skin, muscle, bone, kidney, or liver after short-, medium-, and long-term treatments in aging rats. In addition, PBMT-sMF may have protective effects on the muscle tissue in aging rats after short- and long-term treatment.
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Affiliation(s)
- Kadma Karênina Damasceno Soares Monteiro
- Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT), Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo 01504-001, Brazil
| | | | - Gianna Móes Albuquerque Pontes
- Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT), Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo 01504-001, Brazil
| | - Adeilson Matias Teixeira
- Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT), Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo 01504-001, Brazil
| | - Fernanda Aparecida de Araújo Agra
- Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT), Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo 01504-001, Brazil
| | - Carolina Barros Alvim
- Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT), Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo 01504-001, Brazil
| | - Sâmela Lopes Medeiros Brigato
- Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT), Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo 01504-001, Brazil
| | - Rodrigo Labat Marcos
- Post-Graduate Program in Biophotonics, Nove de Julho University, São Paulo 01504-001, Brazil
| | - Humberto Dellê
- Post-Graduate Program in Medicine, Nove de Julho University, São Paulo 01504-001, Brazil
| | - Andrey Jorge Serra
- Post-Graduate Program in Cardiology, Federal University of São Paulo, São Paulo 04024-002, Brazil
| | - Ernesto Cesar Pinto Leal-Junior
- Laboratory of Phototherapy and Innovative Technologies in Health (LaPIT), Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University, São Paulo 01504-001, Brazil
- ELJ Consultancy, São Paulo 04076-000, Brazil
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Martinelli A, Andreo L, Dos Santos Malavazzi TC, Terena SML, da Cruz Tobelem D, Bussadori SK, Fernandes KPS, Mesquita-Ferrari RA. Vascular photobiomodulation increases muscle fiber diameter and improves the gait during compensatory hypertrophy of plantar muscle in rats. JOURNAL OF BIOPHOTONICS 2022; 15:e202200192. [PMID: 36054438 DOI: 10.1002/jbio.202200192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
The local photobiomodulation (LPBM) has demonstrated positive effects during compensatory hypertrophy (CH) in skeletal muscle as a response to an overload. The aim was to compare the effects of the transcutaneous vascular photobiomodulation (VPBM) and the LPBM on muscle fiber size, gait functionality, and on mechanical sensitivity during the CH model in rats. VPBM was administered over the rat's main tail vein and LPBM was applied over the plantar muscle region. VPBM induced an increase in muscle fiber diameter and cross-sectional area (CSA) after 7 days. At 14 days, an increase in the fiber diameter was found in both irradiated groups. The VPBM and LPBM promoted the reestablishment of normal gait evaluated by the sciatic functional index after 14 days. No changes were found in the mechanical (nociceptive) sensitivity in VPBM and LPBM groups in comparison to the CH group but there was an increase in the nociceptive sensitivity in the CH groups in comparison to the control after 7 and 14 days. In conclusion, both PBM, vascular and local, were able to improve the muscle size and gait during the CH process with more pronounced effects when irradiation was performed systemically (VPBM).
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Affiliation(s)
- Andréia Martinelli
- Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
| | - Lucas Andreo
- Postgraduate Program in Biophotonics Applied to the Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
| | | | - Stella Maris Lins Terena
- Postgraduate Program in Biophotonics Applied to the Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
| | - Daysi da Cruz Tobelem
- Postgraduate Program in Biophotonics Applied to the Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
| | - Sandra Kalil Bussadori
- Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
- Postgraduate Program in Biophotonics Applied to the Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
| | | | - Raquel Agnelli Mesquita-Ferrari
- Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
- Postgraduate Program in Biophotonics Applied to the Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
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Gong C, Lu Y, Jia C, Xu N. Low-level green laser promotes wound healing after carbon dioxide fractional laser therapy. J Cosmet Dermatol 2022; 21:5696-5703. [PMID: 35947511 DOI: 10.1111/jocd.15298] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/21/2022] [Accepted: 08/08/2022] [Indexed: 12/27/2022]
Abstract
BACKGROUND The carbon dioxide (CO2 ) fractional laser resurfacing has become one of the hottest therapies for dermatoses. However, complications such as skin swelling, prolonged erythema, post-inflammatory hyperpigmentation, and scar formation remain. Low-level laser (LLL) therapy is accepted to promote skin wound healing and regeneration, decrease inflammation and pain, and modulate immunoreaction with low-dose laser of different wavelength. 532 nm laser therapy is commonly used to remove pigmented spots and to tender skin, but not utilized in wound care. OBJECTIVE We aimed to determine the efficacy of the low-level 532 nm green laser in wound healing after CO2 fractional laser. METHODS Six adult male mice (C57BL/6, 8 weeks old) were prepared for animal experiments. The dorsum of each mouse was divided into four parts that, respectively, received designed treatments, as controlled (group Ctrl), 532 nm LLL-treated (group GL), CO2 fractional laser-treated (group FL), and CO2 fractional laser followed by three times 532 nm LLL-treated (group FG). Hematoxylin-eosin staining (H&E), Masson-trichrome staining, CD31 immunohistochemical staining were performed to evaluate the efficacy of wound healing after treated by different irradiations. Western blotting was used to detect the expression of related proteins. Mouse skin fibroblasts (MSFs) were treated with LLL using a wavelength of 532 nm once. Cellular responses were observed and analyzed after 48 hours. Cell viability and migration of different groups were assessed by scratch and the Cell Counting Kit-8 (CCK8) assays, respectively. RESULTS Collagen remodeling and epidermis thickness were significantly enhanced in group FG than that in group FL in morphology. Besides, CD31 immunohistochemical staining indicated prominently increased angiogenesis in both groups FL and FG than non-irradiation group. The expression of extracellular matrix (ECM)-related protein (Col1, Col3 and MMP1) showed a remarkable improvement in wound healing in group FG than that in group FL. Irradiated MSFs showed a better migration ability compared with non-irradiated controls. LLL enhanced the secretion function of MSFs on Collagen I and III. CONCLUSIONS Low-level green laser promotes wound healing after CO2 fractional laser by improving the integrity of skin barrier and allowing for scarless healing. Therefore, low-level green laser therapy might serve as a sequential therapy of invasive laser surgery to ensure a better wound care.
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Affiliation(s)
- Chengchen Gong
- Department of Dermatology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yongzhou Lu
- Department of Dermatology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chuanlong Jia
- Department of Dermatology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Nan Xu
- Department of Dermatology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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The Influence of Different Modes of Exercise on Healthy and Injured Tendons. Stem Cells Int 2022; 2022:3945210. [PMID: 36117720 PMCID: PMC9481386 DOI: 10.1155/2022/3945210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/03/2022] [Accepted: 08/25/2022] [Indexed: 11/17/2022] Open
Abstract
Tendons are essential components of the musculoskeletal system that links the skeletal muscle to the skeleton. This dense connective tissue exhibits great plasticity. Therefore, research on the influence of types of exercise, including acute and long-term training, on the structural and mechanical properties of tendons in athletic and sedentary populations is of critical importance in the design of scientific-based exercise plans and effective tendinopathy treatment. Here, we review recent studies on the relationship between exercise and tendon health and tendinopathy repair to provide a general understanding of how exercise may reshape tendons.
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Pluim M, Heier A, Plomp S, Boshuizen B, Gröne A, van Weeren PR, Vanderperren K, Martens A, Dewulf J, Chantziaras I, Koene M, Luciani A, Oosterlinck M, Van Brantegem L, Delesalle C. Histological tissue healing following high-power laser treatment in a model of suspensory ligament branch injury. Equine Vet J 2022; 54:1114-1122. [PMID: 35008124 DOI: 10.1111/evj.13556] [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: 01/25/2021] [Accepted: 11/11/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND High-power laser therapy gained popularity recently as a regenerative treatment for tendinitis and desmitis in the horse. However, studies evaluating effects of laser therapy on tissue repair at histological level in large mammals are lacking. OBJECTIVES To evaluate effects of high-power laser therapy on suspensory desmitis healing, using a model of suspensory ligament branch injury. STUDY DESIGN In vivo experiments. METHODS Standardised lesions were surgically induced in all 4 lateral suspensory branches of twelve healthy Warmblood horses. Laser therapy (class 4, 15W) was applied daily on 2 of 4 induced lesions for 4 consecutive weeks. Horses were randomly assigned to either short-term study (horses were sacrificed after 4 weeks) or long-term study (6 months). Suspensory ligament samples were scored after staining with haematoxylin-eosin and immunostaining for collagen 1- collagen 3- and factor VIII. RESULTS In the short-term study, significantly better (lower) scores for variation in density (17% above cut-off score in treated lesions vs. 31% above cut-off score in controls, p=0.03), shape of nuclei (54% vs. 92%, p=0.02), fibre alignment (32% vs. 75%, p=0.003) and fibre structure (38% vs. 71%, p=0.02) were found in laser treated lesions when compared to controls. Collagen 3 expression was significantly higher (32% vs. 19%, p=0.006) in control lesions. In both short- and long-term studies combined, parameters lesion size (44% vs. 56%, p=0.02) and shape of nuclei (53% vs. 84%, p=0.05) scored significantly better in treated lesions. Long-term, significantly better (lower) scores were found in the laser-treated group for lesion size (15% vs. 45%, p=0.008) and a higher percentage above cut-off score for density of the nuclei (27% vs. 9%, p=0.02), compared to controls. MAIN LIMITATIONS The model of suspensory branch injury is not an exact representation of clinical overstrain lesions. CONCLUSIONS These results suggest that high-power laser therapy enables better lesion healing than conservative treatment.
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Affiliation(s)
- Mathilde Pluim
- Department of Virology, Parasitology and Immunology, Research group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.,Tierklinik Lüsche GmbH, Bakum, Germany
| | - Annabelle Heier
- Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Saskia Plomp
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Berit Boshuizen
- Department of Virology, Parasitology and Immunology, Research group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Andrea Gröne
- Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - P René van Weeren
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Katrien Vanderperren
- Department of Veterinary Medical Imaging and Small Animal Orthopedics, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Ann Martens
- Department of Surgery and Anesthesiology of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Jeroen Dewulf
- Unit of Veterinary Epidemiology, Department of Obstetrics, Reproduction and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Ilias Chantziaras
- Unit of Veterinary Epidemiology, Department of Obstetrics, Reproduction and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | | | | | - Maarten Oosterlinck
- Department of Surgery and Anesthesiology of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Leen Van Brantegem
- Department of Pathology, Bacteriology and Poultry Diseases, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Cathérine Delesalle
- Department of Virology, Parasitology and Immunology, Research group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.,Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
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Liu J, Xu MY, Wu J, Zhang H, Yang L, Lun DX, Hu YC, Liu B. Picrosirius-Polarization Method for Collagen Fiber Detection in Tendons: A Mini-Review. Orthop Surg 2021; 13:701-707. [PMID: 33689233 PMCID: PMC8126917 DOI: 10.1111/os.12627] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 01/14/2020] [Accepted: 01/14/2020] [Indexed: 12/31/2022] Open
Abstract
Although the structure and composition of collagen have been studied by polarized light microscopy since the early 19th century, many studies and reviews have paid little or no attention to the morphological problems of histopathological diagnosis. The morphology of collagen fibers is critical in guiding mechanical and biological properties in both normal and pathological tendons. Highlighting the organization and spatial distribution of tendon‐containing collagen fibers can be very useful for visualizing a tendon's ultrastructure, biochemical and indirect mechanical properties, which benefits other researchers and clinicians. Picrosirius red (PSR) staining, relying on the birefringence of collagen fibers, is one of the best understood histochemical methods that can highly and specifically underline fibers better than other common staining techniques when combined with polarized light microscopy (PLM). Polarized light microscopy provides complementary information about collagen fibers, such as orientation, type and spatial distribution, which is important for a comprehensive assessment of collagen alteration in a tendon. Here, this brief review serves as a simplistic and important primer to research developments in which differential staining of collagen types by the Picrosirius‐polarization method is increasing in diverse studies of the medical field, mainly in the assessment of the morphology, spatial distribution, and content of collagen in tendons.
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Affiliation(s)
- Jie Liu
- Tianjin Medical University, Tianjin, China
| | | | - Jing Wu
- Center for Medical Device Evaluation NMPA, Beijing, China
| | | | - Li Yang
- Tianjin Hospital, Tianjin, China
| | | | | | - Bin Liu
- Center for Medical Device Evaluation NMPA, Beijing, China
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Martinelli A, Andreo L, Alves AN, Terena SML, Santos TC, Bussadori SK, Fernandes KPS, Mesquita-Ferrari RA. Photobiomodulation modulates the expression of inflammatory cytokines during the compensatory hypertrophy process in skeletal muscle. Lasers Med Sci 2020; 36:791-802. [PMID: 32638240 DOI: 10.1007/s10103-020-03095-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 07/01/2020] [Indexed: 02/06/2023]
Abstract
Compensatory hypertrophy (CH) occurs due to excessive mechanical load on a muscle, promoting an increase in the size of muscle fibers. In clinical practice, situations such as partial nerve injuries, denervation, and muscle imbalance caused by trauma to muscles and nerves or diseases that promote the loss of nerve conduction can induce CH in muscle fibers. Photobiomodulation (PBM) has demonstrated beneficial effects on muscle tissue during CH. The aim of the present study was to evaluate the effect of PBM on the inflammatory cytokines interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-α) as well as type 2 metalloproteinases (MMP-2) during the process of CH due to excessive load on the plantaris muscle in rats. Forty-five Wistar rats weighing 250 g were divided into three groups: control group (n = 10), hypertrophy (H) group (n = 40), and H + PBM group (n = 40). CH was induced through the ablation of synergist muscles of the plantaris muscle. The tendons of the gastrocnemius and soleus muscles were isolated and sectioned to enable the partial removal of each of muscle. The preserved plantaris muscle below the removed muscles was submitted to excessive functional load. PBM was performed with low-level laser (AsGaAl, λ = 780 nm; 40 mW; energy density: 10 J/cm2; 10 s on each point, 8 points; 3.2 J). Animals from each group were euthanized after 7 and 14 days. The plantaris muscles were carefully removed and sent for analysis of the gene and protein expression of IL-6 and TNF-α using qPCR and ELISA, respectively. MMP-2 activity was analyzed using zymography. The results were submitted to statistical analysis (ANOVA + Tukey's test, p < 0.05). The protein expression analysis revealed an increase in IL-6 levels in the H + PBM group compared to the H group and a reduction in the H group compared to the control group. A reduction in TNF-α was found in the H and H + PBM groups compared to the control group at 7 days. The gene expression analysis revealed an increase in IL-6 in the H + PBM group compared to the H group at 14 days as well as an increase in TNF-α in the H + PBM group compared to the H group at 7 days. Increases in MMP-2 were found in the H and H + PBM groups compared to the control group at both 7 and 14 days. Based on findings in the present study, it is concluded that PBM was able to modulate pro-inflammatory cytokines that are essential for the compensatory hypertrophy process. However, it has not shown a modulation effect directly in MMP-2 activity during the same period evaluated.
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Affiliation(s)
- A Martinelli
- Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil
| | - L Andreo
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil
| | - A N Alves
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil
| | - S M L Terena
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil
| | - T C Santos
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil
| | - S K Bussadori
- Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil.,Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil
| | - K P S Fernandes
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil
| | - Raquel Agnelli Mesquita-Ferrari
- Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil. .,Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 349, São Paulo, SP, 01504001, Brazil.
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Terena SML, Mesquita-Ferrari RA, de Siqueira Araújo AM, Fernandes KPS, Fernandes MH. Photobiomodulation alters the viability of HUVECs cells. Lasers Med Sci 2020; 36:83-90. [PMID: 32304000 DOI: 10.1007/s10103-020-03016-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 03/30/2020] [Indexed: 11/28/2022]
Abstract
The aim of the present study was to investigate the influence of low-level red (660 nm) and infrared (780 nm) laser with four different radiance exposures on human umbilical vein endothelial cells (HUVECs) in vitro. HUVECs (1.5 × 104) were incubated in 96-well culture plates. The cells were maintained in M199 medium supplemented with 20% fetal bovine serum, 1% antibiotic (penicillin), 1% anti-mycotic (Fungizone), and 1% endothelial cell growth supplement. After centrifugation, irradiations (660/780 nm, 40 mW, 1, 5, 10, and 20 J/cm2, 1 s, 5 s, 10 s, and 20 s, respectively, total energy 0.4 J, 2 J, 4 J, and 8 J, and beam spot size at target 0.04 cm2) were performed at the bottom of Falcon tubes such that the laser beam directly reached the cell without passing through the culture medium. The cells were divided into groups based on radiant exposures. Cell viability and protein concentration were verified after 1, 2, 3, 6, 8, and 10 days. Red laser increased the cell viability and protein concentration in all groups (three-way ANOVA, p < 0.05) beginning on the second day. The greatest peak compared with the control was found when the radiant exposure was 5 J/cm2 and 10 J/cm2. Infrared laser inhibited cell viability and modulated the protein concentration in the cells, with the highest peak protein concentration found on the second day in the group with radiant exposure of 1 J/cm2 and 10 J/cm2 (three-way ANOVA, p < 0.05). Red laser increased the viability and concentration of total proteins in HUVECs, whereas infrared laser had an inhibitory effect on cell viability, while maintaining the total protein concentration similar to that found in the control group.
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Affiliation(s)
- Stella Maris Lins Terena
- Biophotonics Applied to Health Sciences, Universidade Nove de Julho - UNINOVE, São Paulo, SP, Brazil
| | - Raquel Agnelli Mesquita-Ferrari
- Biophotonics Applied to Health Sciences, Universidade Nove de Julho - UNINOVE, São Paulo, SP, Brazil. .,Rehabilitation Sciences, Universidade Nove de Julho -UNINOVE, São Paulo, SP, Brazil.
| | | | | | - Maria Helena Fernandes
- Faculty of Dental Medicine, U. Porto - FMDUP, Porto, Portugal.,LAVQ/REQUIMTE, U. Porto, Porto, Portugal
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9
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Luna SPL, Schoen A, Trindade PHE, Rocha PBD. Penetration Profiles of a Class IV Therapeutic Laser and a Photobiomodulation Therapy Device in Equine Skin. J Equine Vet Sci 2019; 85:102846. [PMID: 31952636 DOI: 10.1016/j.jevs.2019.102846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/05/2019] [Accepted: 11/08/2019] [Indexed: 01/25/2023]
Abstract
Photobiomodulation therapy (PBMT) effects depend on the energy settings and laser penetration. We investigated the penetration time profiles of two different light therapy devices, at the dark and light skin regions in horses. Six light skin and six dark skin adult clinically healthy Arab and Quarter horses were used. A cutometer was used to measure the width of the skin fold from both sides of the cervical area, followed by three measurements of the thickness of the same skin fold by transversal and longitudinal ultrasonography (US). The depth of light penetration was compared based on the percentage of penetration versus power, between a portable PBMT device versus a class IV laser device. The laser mean power output was measured with an optical power meter system for 120 seconds after penetrating the skin. Skin width and laser penetration were compared among equipment by paired "t" test. There was no difference in the width of the skin fold between measurements acquired by the cutometer against either longitudinal or transversal US or between the US measurements at cervical versus metacarpus area. Light penetration was greater in both kinds of skins in the PBMT (0.01303 ± 0.00778) versus class IV laser (0.00122 ± SD 0.00070) (P < .001). The PBMT device provided a greater energy penetration than the class IV laser in unclipped light and dark skin, suggesting that the former may produce a better therapeutic effect. The color of the skin changes penetration profiles of PBMT.
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Affiliation(s)
- Stelio Pacca Loureiro Luna
- School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (Unesp), Botucatu, São Paulo, Brazil.
| | - Allen Schoen
- Center for Integrative Animal Health, Salt Spring Island, British Columbia, Canada
| | | | - Paula Barreto da Rocha
- School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
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