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Araújo GLB, Soares LGP, Santos AS, Cangussú MCT, Dos Santos JN, Pinheiro ALB. Effects of Violet and IR LED Light on mast cell degranulation: in vivo study in a murine model. Lasers Med Sci 2023; 38:159. [PMID: 37442837 DOI: 10.1007/s10103-023-03825-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 07/07/2023] [Indexed: 07/15/2023]
Abstract
The aim of this study was to evaluate the influence of IR (λ850 ± 10 nm) and violet (λ405 ± 10 nm) LED phototherapy on total mast cells counts and its ability to influence mast cell degranulation. For this, 27 Wistar rats were used and were randomly distributed into three groups: control, IR LED, and violet LED. When indicated, irradiation done and they were sacrificed, had their tongue removed immediately, 20-min, 45-min, and 2-h after irradiation. Samples were processed to wax, cut, and stained with Toluidine Blue. Intact and degranulated mast cells were counted under light microscopy, and statistical analysis was carried out. In the superficial connective tissue and muscular tissues, violet LED light caused a significant increase in both total number and degranulated mast cells when compared to the control group immediately after irradiation. The degranulation indexes were higher in the groups irradiated with Violet light, both in superficial connective tissue and muscular tissues in relation to the timing. Irradiation with IR LED caused immediate increase in the total number and degranulated of mast cells when compared to the control group only in the superficial connective tissue. In all times observed, the highest total amount of mast cells was seen immediately after irradiation, except in the muscular tissue, which presented the highest amount after 20-min. It was concluded that IR and violet LED light were able to increase the number of mast cells and inducing degranulation in oral mucosa. However, considering that violet LED light can be harmful in periodontal disease, it seems that the use of IR LED light could be the best option in Dentistry.
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Affiliation(s)
- Geyza Lopes Borges Araújo
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, 62, Araujo Pinho Ave, Canela, Salvador, BA, CEP 40110-150, Brazil
| | - Luiz Guilherme Pinheiro Soares
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, 62, Araujo Pinho Ave, Canela, Salvador, BA, CEP 40110-150, Brazil
- Center for Orthodontics and Facial Orthopedics Prof. José Édimo Soares Martins, School of Dentistry, Federal University of Bahia, 62, Araujo Pinho Ave, Canela, Salvador, BA, CEP 40110-150, Brazil
| | - Amanda Silva Santos
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, 62, Araujo Pinho Ave, Canela, Salvador, BA, CEP 40110-150, Brazil
| | - Maria Cristina Teixeira Cangussú
- Epidemiology and Public Health, School of Dentistry, Federal University of Bahia, 62, Araujo Pinho Ave, Canela, Salvador, BA, CEP 40110-150, Brazil
| | - Jean Nunes Dos Santos
- Laboratory of Surgical Pathology, School of Dentistry, Federal University of Bahia, 62, Araujo Pinho Ave, Canela, Salvador, BA, CEP 40110-150, Brazil
| | - Antônio Luiz Barbosa Pinheiro
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, 62, Araujo Pinho Ave, Canela, Salvador, BA, CEP 40110-150, Brazil.
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de Santana Cerqueira N, Vitória LA, da Silva VP, Rodriguez TT, Cangussu MCT, Ramalho LMP. Expression and degranulation of mast cells in laser photobiomodulated mucositis chemo-induced: pilot study in hamsters. Lasers Med Sci 2023; 38:31. [PMID: 36595054 DOI: 10.1007/s10103-022-03698-7] [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: 09/05/2022] [Accepted: 12/20/2022] [Indexed: 01/04/2023]
Abstract
This study aimed to evaluate the influence of laser photobiomodulation on the expression and degranulation of mast cells in chemo-induced oral mucositis (OM) lesions in hamsters. Twelve adult male Syrian hamsters (Mesocricetus auratus), golden lineage, were submitted to OM induction. They were divided into three groups: control-OM without treatment (C), OM treated with red laser (RL), OM treated with infrared laser (IL) and analyzed in the experimental time of 7 days. Three and 4 days after the intraperitoneal injection of the chemotherapy drug fluorouracil, the OM lesions were induced by making grooves in the right cheek pouch. Immediately after chemoinduction, the hamsters were submitted to photobiomodulation every 48 h for 7 days. The specimens were processed and stained using the hematoxylin-eosin and toluidine blue techniques. There was a predominance of mild chronic inflammation in the experimental groups and a greater persistence of neutrophils in the control group (C), although not statistically significant. The group irradiated with red laser (RL) had the highest mean mast cell expression (38.28 ± 19.05) (p < 0.001). As for the degranulation activity in mast cells, the control group (C) showed a greater number of fields with more than 50% of degranulated cells, presenting statistical significance when comparing it with the RL (p < 0.009) and IL (p = 0.036) group. It can be concluded that photobiomodulation, at both wavelengths, decreased mast cell degranulation, accelerating the inflammatory process. The use of infrared laser provided, in addition to less degranulation, the quantitative reduction of mast cells.
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Affiliation(s)
- Naiadja de Santana Cerqueira
- Postgraduate Program in Dentistry and Health, Faculty of Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil
| | | | | | - Tânia Tavares Rodriguez
- Department of Bioregulation, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, Brazil
| | | | - Luciana Maria Pedreira Ramalho
- Department of Propaedeutics and Integrated Clinic, Faculty of Dentistry, Federal University of Bahia, Araújo Pinho Avenue, no. 62, Canela, 9th floor, Salvador, Bahia, 40301-155, Brazil.
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Role of opsins and light or heat activated transient receptor potential ion channels in the mechanisms of photobiomodulation and infrared therapy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2023. [DOI: 10.1016/j.jpap.2023.100160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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Effectiveness of Laser Therapy and Laser Acupuncture on Treating Paraesthesia After Extraction of Lower Third Molars. Photobiomodul Photomed Laser Surg 2021; 39:774-781. [DOI: 10.1089/photob.2021.0022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Impact of preconditioned diabetic stem cells and photobiomodulation on quantity and degranulation of mast cells in a delayed healing wound simulation in type one diabetic rats. Lasers Med Sci 2021; 37:1593-1604. [PMID: 34476655 DOI: 10.1007/s10103-021-03408-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 08/20/2021] [Indexed: 02/07/2023]
Abstract
Herein, we report the influence of administering different protocols of preconditioned diabetic adipose-derived mesenchymal stem cells (ADSs) with photobiomodulation in vitro, and photobiomodulation in vivo on the number of mast cells (MCs), their degranulation, and wound strength in the maturation step of a Methicillin-resistant Staphylococcus aureus (MRSA)-infectious wound model in rats with type one diabetes. An MRSA-infectious wound model was generated on diabetic animals, and they were arbitrarily assigned into five groups (G). G1 were control rats. In G2, diabetic ADS were engrafted into the wounds. In G3, diabetic ADS were engrafted into the wound, and the wound was exposed to photobiomodulation (890 nm, 890 ± 10 nm, 80 Hz, 0.2 J/cm2) in vivo. In G4, preconditioned diabetic ADS with photobiomodulation (630 and 810 nm; each 3 times with 1.2 J/cm2) in vitro were engrafted into the wound. In G5, preconditioned diabetic ADS with photobiomodulation were engrafted into the wound, and the wound was exposed to photobiomodulation in vivo. The results showed that, the maximum force in all treatment groups was remarkably greater compared to the control group (all, p = 0.000). Maximum force in G4 and G5 were superior than that other treated groups (both p = 0.000). Moreover, G3, G4, and G5 showed remarkable decreases in completely released MC granules and total numbers of MC compared to G1 and G2 (all, p = 0.000). We concluded that diabetic rats in group 5 showed significantly better results in terms of accelerated wound healing and MC count of an ischemic infected delayed healing wound model.
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Almeida TFA, Oliveira SR, de Noronha MS, Moreno A, Mesquita RA, Abreu LG, da Silva TA. Type IV hypersensitivity associated with restorative materials: Clinical report and systematic literature review. J Prosthet Dent 2021; 128:1201-1210. [PMID: 33820631 DOI: 10.1016/j.prosdent.2021.01.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/25/2021] [Accepted: 01/26/2021] [Indexed: 10/21/2022]
Abstract
STATEMENT OF PROBLEM Type IV hypersensitivity reactions (Type IV HR) are immune responses mediated by antigen-specific effector T cells. PURPOSE The purpose of this clinical report and systematic review was to report the clinicopathological features of Type IV HR in the oral mucosa and to present a systematic literature review of case reports and case series of individuals with Type IV HR in the oral mucosa related to contact with dental materials. MATERIAL AND METHODS The presented clinical lesions were melanotic macules with burning that affected the internal labial mucosa in contact with composite resin veneer crowns. Histopathological and immunohistochemical analysis of the lesion was performed. The systematic literature review was performed based on a search in 4 electronic databases (PubMed/MEDLINE, Scopus, Web of Science, and Ovid). RESULTS Immunohistochemistry showed positivity for CD4, CD8, CD20, CD3, tryptase, and CD117. After conservative treatment, the patient reported improvement of symptoms, and a decrease in the number of inflammatory cells was verified. Twenty-one articles were included in the review. Unlike the present patient, the authors of all the articles recommended radical treatment with the removal of the dental material. CONCLUSIONS Type IV HR in oral mucosa is rare, and the assessment of clinical and histopathological characteristics is essential to perform an accurate diagnosis and provide appropriate treatment.
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Affiliation(s)
- Tatiana F A Almeida
- Postdoctoral research, Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Sicília R Oliveira
- PhD student, Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Mariana S de Noronha
- PhD student, Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Amália Moreno
- Professor, Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Ricardo A Mesquita
- Professor, Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Lucas G Abreu
- Professor, Department of Child's and Adolescent's Oral Health, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Tarcília A da Silva
- Professor, Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
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do Valle IB, Prazeres PHDM, Mesquita RA, Silva TA, de Castro Oliveira HM, Castro PR, Freitas IDP, Oliveira SR, Gomes NA, de Oliveira RF, Marquiore LF, Macari S, do Amaral FA, Jácome-Santos H, Barcelos LS, Menezes GB, Marques MM, Birbrair A, Diniz IMA. Photobiomodulation drives pericyte mobilization towards skin regeneration. Sci Rep 2020; 10:19257. [PMID: 33159113 PMCID: PMC7648092 DOI: 10.1038/s41598-020-76243-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 10/26/2020] [Indexed: 12/11/2022] Open
Abstract
Photobiomodulation is being widely applied for improving dermal or mucosal wound healing. However, the underlying cellular and molecular processes that directly contribute to its effects remain poorly understood. Pericytes are relevant cells involved in the wound microenvironment and could be one of the main targets of photobiomodulation due to their plasticity and perivascular localization. Herein, we investigate tissue repair under the photobiomodulation stimulus using a pericyte labeled (or reporter) transgenic mice. Using a model of two contralateral back wounds, one the control and the other photoactivated daily (660 nm, 20 mW, 0.71 W/cm2, 5 J/cm2, 7 s, 0.14 J), we showed an overall influx of immune and undifferentiated cells and higher mobilization of a potent pericyte subpopulation (Type-2 pericytes) in the photoactivated wounds in comparison to the controls. Doppler analysis showed a significant increase in the blood flow in the photoactivated wounds, while marked vascular supply was observed histologically. Histochemical analysis has indicated more advanced stages of tissue repair after photoactivation. These data suggest that photobiomodulation significantly accelerates tissue repair through its vascular effects with direct recruitment of pericytes to the injury site.
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Affiliation(s)
- Isabella Bittencourt do Valle
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil
- Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Ricardo Alves Mesquita
- Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tarcília Aparecida Silva
- Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Pollyana Ribeiro Castro
- Department of Physiology and Biophysics, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Iuri Dornelas Prates Freitas
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil
- School of Dentistry, Faculdade Sete Lagoas, Sete Lagoas, Minas Gerais, Brazil
| | - Sicília Rezende Oliveira
- Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Natália Aparecida Gomes
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil
| | - Rafaela Férrer de Oliveira
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil
| | - Larissa Fassarela Marquiore
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil
| | - Soraia Macari
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil
| | - Flávio Almeida do Amaral
- Department of Biochemistry and Immunology, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Humberto Jácome-Santos
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil
- Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Lucíola Silva Barcelos
- Department of Physiology and Biophysics, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gustavo Batista Menezes
- Department of Morphology, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Alexander Birbrair
- Departament of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ivana Márcia Alves Diniz
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, 31.270-901, Brazil.
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Alves FAM, Marques MM, Cavalcanti SCSXB, Pedroni ACF, Ferraz EP, Miniello TG, Moreira MS, Jerônimo T, Deboni MCZ, Lascala CA. Photobiomodulation as adjunctive therapy for guided bone regeneration. A microCT study in osteoporotic rat model. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2020; 213:112053. [PMID: 33142216 DOI: 10.1016/j.jphotobiol.2020.112053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 10/01/2020] [Accepted: 10/06/2020] [Indexed: 02/02/2023]
Abstract
Regeneration of diseased bone is challenging. Guided bone regeneration (GBR) has been applied to favor the bone repair. Photobiomodulation (PBM) is also a recognized therapy able to improve bone repair in healthy and diseased individuals. Thus, with the hypothesis that PBM therapy could improve the GBR of diseased bone, this study evaluated the effect of PBM as adjunctive therapy to GBR in osteoporotic rats. Osteoporosis was induced in rats using the oophorectomy model. Then, 5-mm calvaria bone defects were created and treated according to the experimental groups, as follows: with no further treatment (Control); conventional GBR (Membrane), GBR and PBM applied with 3 s, 4 J/cm2 and 0.12 J per point (PBM-1) and GBR and PBM applied with 10s, 14 J/cm2, 0.4 J per point (PBM-2). PBM therapy (808 nm, 40 mW, 1.42 W/cm2) was applied immediately, 48 and 96 h postoperatively. Four and eight weeks later, the samples were harvested and processed for micro-computerized tomography (Micro CT). Data were statistically compared (p < 0.05). From 4 to 8 weeks mostly significant changes were observed in the PBM groups. The bone volume fraction and number of trabeculae of the PBM groups, especially the PBM-1, were significantly higher than those of Control (p < 0.0001). The values of thickness and separation of the trabeculae and structural model index of the PBM groups were significantly smaller than Control (p < 0.0001). The connectivity density was significantly higher on Membrane and PBM groups than Control (p < 0.0004). The application of PBM as adjunctive therapy to GBR results in enhanced bone formation and maturation in comparison to the conventional GBR in the regeneration of lesions of osteoporotic bone in rats. Overviewing the challenges that face bone regeneration in patients with osteoporosis, our findings open new perspectives on the treatment of bone defects under osteoporotic conditions.
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Affiliation(s)
| | | | | | | | | | | | | | - Tomaís Jerônimo
- Department of Stomatology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
| | | | - Cesar Angelo Lascala
- Department of Stomatology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil.
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Castro TNS, Martignago CCS, Assis L, de Alexandria FED, Rocha JCT, Parizotto NA, Tim CR. Effects of photobiomodulation therapy in the integration of skin graft in rats. Lasers Med Sci 2019; 35:939-947. [PMID: 31833005 DOI: 10.1007/s10103-019-02909-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 10/18/2019] [Indexed: 11/29/2022]
Abstract
Skin graft is one of the most common techniques used in plastic surgery and repair. However, there are some complications that can lead to loss of the skin graft. Thus, several features have been studied with the aim of promoting the integration of skin grafts. Among these resources, the use of laser photobiomodulation (laser PBM) has been highlighted. The present study aimed to investigate the effects of laser PBM on the viability and integration of skin grafts in rats. Twenty male Wistar rats (± 250 g) were randomly assigned into two experimental groups with 10 animals each: control group, animals submitted to skin graft and simulation of laser PBM; laser PBM group, submitted to the skin graft and submitted to laser PBM at 660 nm, 40 mW, 60 s, 2.4 J. The animals were submitted to laser photobiomodulation immediately after the surgical procedure and each 24 h. Animal euthanasia occurred on the 7th day after surgery, 24 h after the last treatment session. The histopathological analysis revealed that the laser PBM showed better adhesion of the graft when compared to the control group. Likewise, the morphometric analysis of mast cells, blood vessels, and collagen showed a statistically significant increase in the animals irradiated with the laser PBM when compared to the control group. In addition, immunohistochemical analysis demonstrated that the laser PBM showed statistically higher immunoexpression of FGF when compared to the CG. However, IL-4 immunoexpression did not show statistical difference between the experimental groups. From the results obtained in the present study, it can be suggested that laser photobiomodulation was effective in promoting the integration and viability of total skin grafts in rats.
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Affiliation(s)
| | | | - Lívia Assis
- Instituto Científico e, Tecnológico da Universidade Brasil, Carolina Fonseca, São Paulo, 235, Brazil
| | | | | | - Nivaldo Antonio Parizotto
- Instituto Científico e, Tecnológico da Universidade Brasil, Carolina Fonseca, São Paulo, 235, Brazil
| | - Carla Roberta Tim
- Instituto Científico e, Tecnológico da Universidade Brasil, Carolina Fonseca, São Paulo, 235, Brazil.
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Zheng M, Gao S, Yu Y, Xu J, Huang Z, Li J, Xie S, Lin J. Surface-enhanced Raman spectroscopy analysis of mast cell degranulation induced by low-intensity laser. IET Nanobiotechnol 2019; 13:983-988. [PMID: 31811770 DOI: 10.1049/iet-nbt.2019.0145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Mast cell (MC) degranulation is an important step in the healing process. In this study, silver-nanoparticles-based surface-enhanced Raman spectroscopy (SERS) was used to investigate the spectral characteristics of degranulation of MCs activated by low-intensity laser. The significant spectral changes, such as Raman peak intensities, suggested the concentration variation of some degranulated substances. The Raman intensity ratio of 799-554 cm-1 could be used as a potential internal indicator for the degranulation degree of MCs. Principal component analysis (PCA) was employed to reduce the high dimension of spectra into a few principal components (PCs) while retaining the most diagnostically significant information for sample differentiation. Using the diagnostically significant PC scores (P < 0.05), linear discriminate analysis (LDA) was applied to identify different cell degranulation groups with high sensitivity, specificity and accuracy. This exploratory work demonstrates that SERS technique combined with a PCA-LDA algorithm possesses great potential for developing a label-free, comprehensive, non-invasive and accurate method for measuring MC degranulation.
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Affiliation(s)
- Mengmeng Zheng
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian, People's Republic of China
| | - Siqi Gao
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian, People's Republic of China
| | - Yun Yu
- College of Integrated Traditional Chinese and Western Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, People's Republic of China
| | - Jianshu Xu
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian, People's Republic of China
| | - Zufang Huang
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian, People's Republic of China
| | - Juan Li
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian, People's Republic of China
| | - Shusen Xie
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian, People's Republic of China
| | - Juqiang Lin
- Key Laboratory of OptoElectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian, People's Republic of China.
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Sindici E, Giuliano B, Astesano S, Fazio L, Dragonetti A, Pugliese M, Carossa S, Broccoletti R, Arduino PG. Cord blood platelet gel alone or in combination with photobiomodulation therapy for the treatment of oral ulcerations in patients with epidermolysis bullosa: A pilot clinical comparative study. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2017; 34:269-272. [DOI: 10.1111/phpp.12366] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/29/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Ezio Sindici
- Department of Surgical Sciences; CIR-Dental School; University of Turin; Turin Italy
| | - Beatrice Giuliano
- Department of Surgical Sciences; CIR-Dental School; University of Turin; Turin Italy
| | - Simona Astesano
- Department of Surgical Sciences; CIR-Dental School; University of Turin; Turin Italy
| | - Luigina Fazio
- Torino Cord Blood Bank - Immunohematology and Transfusional Medical Service; A.O.U. Città della Salute e della Scienza; Turin Italy
| | - Antonella Dragonetti
- Torino Cord Blood Bank - Immunohematology and Transfusional Medical Service; A.O.U. Città della Salute e della Scienza; Turin Italy
| | - Mariateresa Pugliese
- Torino Cord Blood Bank - Immunohematology and Transfusional Medical Service; A.O.U. Città della Salute e della Scienza; Turin Italy
| | - Stefano Carossa
- Department of Surgical Sciences; CIR-Dental School; University of Turin; Turin Italy
| | - Roberto Broccoletti
- Department of Surgical Sciences; CIR-Dental School; University of Turin; Turin Italy
| | - Paolo Giacomo Arduino
- Department of Surgical Sciences; CIR-Dental School; University of Turin; Turin Italy
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de Oliveira RF, Goldman RS, Mendes FM, de Freitas PM. Influence of Electroacupuncture and Laser-Acupuncture on Treating Paresthesia in Patients Submitted to Combined Orthognathic Surgery and Genioplasty. Med Acupunct 2017; 29:290-299. [PMID: 29067139 DOI: 10.1089/acu.2017.1228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Objective: The goal of this research was to observe the influence of electroacupuncture (EA) and laser-acupuncture on the return of tactile/pain sensitivity in patients who underwent orthognathic surgery. Materials and Methods: Thirty volunteers subjected to orthognathic surgery were evaluated and randomly divided into 2 groups, in which 3 treatments were evaluated: control (n = 30) (G0, medication + placebo laser treatment) and 2 experimental treatments (n = 15) (G1, medication + EA) or G2 (medication + laser-acupuncture). The control group had n = 30 because for each experimental treatment conducted on a volunteer's hemi-face, there was a control treatment on the other hemi-face. In G1, medication was given with EA, with needles placed at predetermined points (ST 4 [Dicang], M-HN-18 [Jiachengjiang], CV 24 [Chengjiang], ST 5 [Daying], ST 6 [Jiache], and point A1 [YNSA]). For electrostimulation, the device used delivered transcutaneous electrical nerve stimulation of a burst type, with intensity and frequency variations of T = 220 ms and F = 4 Hz (30 minutes, 2 × /week). In G2, in addition to the medication, laser irradiation (at 780 nm) was applied on acupuncture points (at 0.04 cm2, 70 mW, 6 s/point, 0.42 J/point, 10 J/cm2, 2 × /week). All volunteers were evaluated before and during the 4 months following the surgery. Tactile sensitivity was assessed by mechanical brushing (brush #s 2 and 12) and by a 2-point discrimination test, using a bow compass. A pain test was performed with a pulp electrical test that stimulates intact nerves of the dentin-pulp complex. A Kaplan-Meier test was performed, and survival curves were plotted for comparison between groups. Cox regression analysis was also conducted (α = 0.05). Results: There were no statistically significant differences among the groups for the 2-point discrimination test (brushes #2 and #12) on the buccal mucosa region and for the pulp test on all evaluated regions. However, the tactile test using brush #12 revealed significant differences between G1 and the other groups when considering the lower lip (P = 0.024) and chin (P = 0.028) areas. Conclusions: Only EA was able to influence-using the brushing test (brush #12)-the return of tactile sensitivity on the chin and lower lip positively after combined orthognathic surgery and genioplasty.
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Affiliation(s)
- Renata F de Oliveira
- Special Laboratory of Lasers in Dentistry, Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
| | - Ricardo S Goldman
- Clínica de Cirurgia e Traumatologia Buco-Maxilo-Faciais, São Paulo, SP, Brazil
| | - Fausto Medeiros Mendes
- Department of Orthodontics and Pediatrics Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
| | - Patricia Moreira de Freitas
- Special Laboratory of Lasers in Dentistry, Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
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Valenzuela S, Lopez-Jornet P. Effects of low-level laser therapy on burning mouth syndrome. J Oral Rehabil 2016; 44:125-132. [PMID: 27893167 DOI: 10.1111/joor.12463] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/23/2016] [Indexed: 01/03/2023]
Abstract
To investigate low-level laser therapy (LLLT) applied to treat burning mouth syndrome (BMS). This prospective, comparative, partially blinded, single-centre, clinical trial of GaAlAs Laser, with 815 nm wavelength, included 44 BMS patients divided randomly into three groups: Group I (n = 16): GaAlAs laser 815 nm wavelength, 1 W output power, continuous emissions, 4 s, 4 J and fluence rate 133·3 J cm-2 ; Group II (n = 16): GaAlAs infrared laser, 815 nm wavelength, 1 W output power, continuous emissions, 6 s, 6 J and fluence rate 200 J cm-2 ; Group III (n = 12) placebo group, sham laser. All groups received a weekly dose for 4 weeks. Pain intensity was recorded using a 10-cm visual analogue scale; patients responded to the oral health impact profile (OHIP-14), xerostomia severity test and the hospital anxiety-depression scale (HAD). These assessments were performed at baseline, 2 and 4 weeks. LLLT decreased pain intensity and improved OHIP-14 scores significantly from baseline to 2 weeks in groups I and II compared with the placebo group. No statistically significant differences were found from 2 to 4 weeks. Overall improvements in visual analogue scale (VAS) scores from baseline to the end of treatment were as follows: Group I 15·7%; Group II 15·6%; Group III placebo 7·3%. LLLT application reduces symptoms slightly in BMS patients.
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Affiliation(s)
- S Valenzuela
- Department of Oral Medicine, Faculty of Medicine, University of Murcia, Murcia, Spain.,Medicina Oral, Clínica Odontológica Universitária Hospital Morales Meseguer, Murcia, Spain
| | - P Lopez-Jornet
- Department of Oral Medicine, Faculty of Medicine, University of Murcia, Murcia, Spain.,Medicina Oral, Clínica Odontológica Universitária Hospital Morales Meseguer, Murcia, Spain.,Murcia Institute of Bio-Health Research (IMIB-Arrixaca), Murcia, Spain
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de Oliveira RF, da Silva AC, Simões A, Youssef MN, de Freitas PM. Laser Therapy in the Treatment of Paresthesia: A Retrospective Study of 125 Clinical Cases. Photomed Laser Surg 2016. [PMID: 26226172 DOI: 10.1089/pho.2015.3888] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE The aim of this retrospective study was to evaluate the effectiveness of laser therapy for acceleration and recovery of nerve sensitivity after orthognathic or minor oral surgeries, by analysis of clinical records of patients treated at the Special Laboratory of Lasers in Dentistry (LELO, School of Dentistry, University of São Paulo), throughout the period 2007-2013. BACKGROUND DATA Nerve tissue lesions may occur during various dental and routine surgical procedures, resulting in paresthesia. Laser therapy has been shown to be able to accelerate and enhance the regeneration of the affected nerve tissue; however, there are few studies in the literature that evaluate the effects of treatment with low-power laser on neural changes after orthognathic or minor oral surgeries. METHODS A total of 125 clinical records were included, and the data on gender, age, origin of the lesion, nerve, interval between surgery and onset of laser therapy, frequency of laser irradiation (one or two times per week), final evolution, and if there was a need to change the irradiation protocol, were all recorded. These data were related to the recovery of sensitivity in the affected nerve area. Descriptive analyses and modeling for analysis of categorical data (α=5%) were performed. RESULTS The results from both analyses showed that the recovery of sensitivity was correlated with patient age (p=0.015) and interval between surgery and onset of laser therapy (p=0.002). CONCLUSIONS Within the limits of this retrospective study, it was found that low- power laser therapy with beam emission band in the infrared spectrum (808 nm) can positively affect the recovery of sensitivity after orthognathic or minor oral surgeries.
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Affiliation(s)
- Renata Ferreira de Oliveira
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Alessandro Costa da Silva
- 2 Private Practice, Interclin Clínica de Cirurgia e Traumatologia Buco-Maxilo-Faciais , São Paulo, SP, Brazil
| | - Alyne Simões
- 3 Oral Biology Research Center, Biomaterials and Oral Biochemistry Department, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Michel Nicolau Youssef
- 4 Universidade Cruzeiro do Sul, São Paulo, SP, Brazil/ Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
| | - Patrícia Moreira de Freitas
- 1 Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, University of São Paulo (USP) , São Paulo, SP, Brazil
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Yanaguizawa MS, Suzuki SS, Martinez EF, Suzuki H, Pelegrin MCJ, Garcez AS. Effects of Low-Level Laser Therapy in Orthodontic Patients on Immediate Inflammatory Response After Mini-Implants Insertion: A Preliminary Report. Photomed Laser Surg 2016; 35:57-63. [PMID: 27813716 DOI: 10.1089/pho.2015.3959] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The primary stability of a mini-implant is crucial to treatment sequence since most orthodontic mini-implant failures occur at an early stage. Irritation or inflammation of peri-implant tissues has been related to decreasing mini-implant success. PURPOSE This study evaluates the effect of low-level laser therapy on initial inflammation after orthodontic mini-implants installation. METHODS Ten volunteers received two mini-implants (1.3 mm diameter, 7 mm length). One mini-implant was inserted on each side of the maxilla following manufacturer recommendation. On the right side, low-level laser therapy (LLLT) was applied (diode laser 660 nm, 40 mW, 1 min, 2.4 J of total energy). Peri-implant crevicular fluid (PGF) was obtained after 24 h (T1), 48 h (T2), and 72 h (T3) to identify levels of interleukin (IL)-6 and IL-8 around mini-implants and around upper first premolars. RESULTS An increase in interleukin levels was observed for both groups, compared to upper first premolar. PGF around nonirradiated mini-implants showed higher levels of IL-8. Levels of IL-6 24 h after mini-implant insertion were higher for laser group. CONCLUSIONS LLLT modulates the initial inflammation after the insertion of mini-implant, possibly increasing the mini-implant success prognostic and decreasing patient discomfort.
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Affiliation(s)
- Mario S Yanaguizawa
- São Leopoldo Mandic Dental Research Center , Rua José Rocha Junqueira, 13, Campinas, Brazil
| | - Selly S Suzuki
- São Leopoldo Mandic Dental Research Center , Rua José Rocha Junqueira, 13, Campinas, Brazil
| | - Elizabeth F Martinez
- São Leopoldo Mandic Dental Research Center , Rua José Rocha Junqueira, 13, Campinas, Brazil
| | - Hideo Suzuki
- São Leopoldo Mandic Dental Research Center , Rua José Rocha Junqueira, 13, Campinas, Brazil
| | | | - Aguinaldo S Garcez
- São Leopoldo Mandic Dental Research Center , Rua José Rocha Junqueira, 13, Campinas, Brazil
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Arduino PG, Cafaro A, Garrone M, Gambino A, Cabras M, Romagnoli E, Broccoletti R. A randomized pilot study to assess the safety and the value of low-level laser therapy versus clonazepam in patients with burning mouth syndrome. Lasers Med Sci 2016; 31:811-6. [PMID: 26873501 DOI: 10.1007/s10103-016-1897-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 01/27/2016] [Indexed: 12/26/2022]
Abstract
Comparison between low-level laser therapy (LLLT) and clonazepam for treating burning mouth syndrome (BMS) patients has never been documented; the aim of this study was to assess the effects of LLLT photobiomodulation versus medical therapy with clonazepam on BMS. Thirty-three patients (25 female, 8 male, mean age = 67.12) were randomly allocated to two different groups: the first one (group A, 18 patients) underwent two laser irradiation sessions weekly for 5 weeks, whereas the second one (group B, 15 patients) received topical clonazepam therapy [half a tablet (2 mg) in the mouth without swallowing for 3 min, three times a day for 21 days]. LLLT was delivered with a continuous wave 980-nm aluminum gallium arsenide (AlGaAs) diode laser and the output of 300 mW, delivering a Fluence of 10 J/cm(2), using a "spot technique," with an average power density of about 1 W/cm(2). The laser probe was held perpendicularly at a distance of about 2 mm from the mucosa. Visual analogue scale (VAS), McGill Pain Questionnaire, present pain intensity (PPI), and Oral Health Impact Profile (OHIP-49) assessed sensation of pain. Hospital Anxiety and Depression Scale and Geriatric Depression Scale assessed levels of anxiety and depression. Twelve weeks after the end of treatment, patients treated with LLLT experienced a decrease in pain sensation reported for all the parameters analyzed: VAS (P = 0.004), McGill Pain Questionnaire (P = 0.002), PPI (P = 0.002), and OHIP-49 (P = 0.010). The group treated with clonazepam had less favorable results for VAS (P = 0.33), McGill Pain Questionnaire (P = 0.005), PPI (P = 0.013), and OHIP-49 (P = 0.25). Levels of anxiety and depression did not change statistically in any groups (P > 0.05). Comparing the two groups, LLLT appeared to be superior in improving pain perception, but statistically only at 8 weeks after the end of the protocol proposed (P = 0.026). Based on this preliminary trial, LLLT is capable of reducing the symptoms of patients with BMS with a constant and long-lasting effect, experienced since the end of the first applications.
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Affiliation(s)
- Paolo G Arduino
- Department of Surgical Sciences, Oral Medicine Section, University of Turin, Unito Lingotto Dental Institute c/o Lingotto, Via Nizza 230, 10126, Turin, Italy.
| | - Adriana Cafaro
- Department of Surgical Sciences, Oral Medicine Section, University of Turin, Unito Lingotto Dental Institute c/o Lingotto, Via Nizza 230, 10126, Turin, Italy
| | - Marco Garrone
- Department of Surgical Sciences, Oral Medicine Section, University of Turin, Unito Lingotto Dental Institute c/o Lingotto, Via Nizza 230, 10126, Turin, Italy
| | - Alessio Gambino
- Department of Surgical Sciences, Oral Medicine Section, University of Turin, Unito Lingotto Dental Institute c/o Lingotto, Via Nizza 230, 10126, Turin, Italy
| | - Marco Cabras
- Department of Surgical Sciences, Oral Medicine Section, University of Turin, Unito Lingotto Dental Institute c/o Lingotto, Via Nizza 230, 10126, Turin, Italy
| | - Ercole Romagnoli
- Department of Surgical Sciences and Integrated Diagnostics, Genoa University, Genoa, Italy
| | - Roberto Broccoletti
- Department of Surgical Sciences, Oral Medicine Section, University of Turin, Unito Lingotto Dental Institute c/o Lingotto, Via Nizza 230, 10126, Turin, Italy
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Colombo F, Neto ADAPV, Sousa APCD, Marchionni AMT, Pinheiro ALB, Reis SRDA. Effect of low-level laser therapy (λ660 nm) on angiogenesis in wound healing: a immunohistochemical study in a rodent model. Braz Dent J 2015; 24:308-12. [PMID: 24173246 DOI: 10.1590/0103-6440201301867] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Accepted: 07/13/2013] [Indexed: 12/11/2022] Open
Abstract
The aim of the present investigation was to evaluate the angiogenesis on dorsal cutaneous wounds in a rodent model treated with λ660 nm laser light. New vessel formation is a multistep process involving vessel sprouting, endothelial cell migration, proliferation and tube formation. Although several in vivo studies have shown that laser phototherapy influences tissue repair, a fully understanding of angiogenesis mechanisms are not yet known. Twenty-four young adult male Wistar rats weighing between 200 and 250 g were used. Under general anesthesia, one excisional wound was created on the dorsum of each animal and they were randomly distributed into two groups: one control and one treated with laser (λ660 nm, 16 mW, 10 J/cm2). Each group was subdivided into three subgroups according to the animal death timing (2, 4 and 6 days). Laser irradiation started immediately after surgery and was repeated every other day during the experiment and marked with Sirius Red, specific for collagen, and immunomarked with anti-TGF-β and anti-von Willebrand factor. Marked sections underwent histological analysis by light microscopy and the mean area of the wound of each animal was calculated and analyzed by ANOVA and Tukey's test (α=0.05). Although at some death periods, collagen expression and number of blood vessels on irradiated animals were higher than in the control ones, no significant differences were found at any time in relation to TGF-β expression (p>0.05). It was concluded that laser treatment (λ660 nm) contributed to increase angiogenesis.
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Passanezi E, Damante CA, de Rezende MLR, Greghi SLA. Lasers in periodontal therapy. Periodontol 2000 2014; 67:268-91. [DOI: 10.1111/prd.12067] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2014] [Indexed: 12/12/2022]
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19
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Do laser and led phototherapies influence mast cells and myofibroblasts to produce collagen? Lasers Med Sci 2014; 29:1405-10. [DOI: 10.1007/s10103-014-1537-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 01/28/2014] [Indexed: 10/25/2022]
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20
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Benefits of laser phototherapy on nerve repair. Lasers Med Sci 2014; 30:1395-406. [DOI: 10.1007/s10103-014-1531-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 01/20/2014] [Indexed: 10/25/2022]
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21
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Garcez AS, Suzuki SS, Martinez EF, Iemini MG, Suzuki H. Effects of low-intensity laser therapy over mini-implants success rate in pigs. Lasers Med Sci 2013; 30:727-32. [DOI: 10.1007/s10103-013-1367-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 06/04/2013] [Indexed: 02/06/2023]
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22
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Fathabadie FF, Bayat M, Amini A, Bayat M, Rezaie F. Effects of pulsed infra-red low level-laser irradiation on mast cells number and degranulation in open skin wound healing of healthy and streptozotocin-induced diabetic rats. J COSMET LASER THER 2013; 15:294-304. [DOI: 10.3109/14764172.2013.764435] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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23
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Potentiated anti-inflammatory effect of combined 780 nm and 660 nm low level laser therapy on the experimental laryngitis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 121:86-93. [PMID: 23524249 DOI: 10.1016/j.jphotobiol.2013.02.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 02/06/2013] [Accepted: 02/08/2013] [Indexed: 12/31/2022]
Abstract
Reflux laryngitis is a common clinic complication of nasogastric intubation (NSGI). Since there is no report concerning the effects of low level laser therapy (LLLT) on reflux laryngitis, this study aimed to analyze the protective effect of single and combined therapies with low level laser at the doses of 2.1J and 2.1+1.2 J with a total irradiation time of 30s and 30+30 s, respectively, on a model of neurogenic reflux laryngitis. NSGI was performed in Wistar rats, assigned into groups: NGI (no treatment), NLT17.5 (single therapy), and NLT17.5/10.0 (combined therapy, applied sequentially). Additional non-intubated and non-irradiated rats were use as controls (CTR). Myeloperoxidase (MPO) activity was assessed by colorimetric method after the intubation period (on days 1, 3, 5, and 7), whereas paraffin-embedded laryngeal specimens were used to carry out histopathological analysis of the inflammatory response, granulation tissue, and collagen deposition 7 days after NSGI. Significant reduction in MPO activity (p<0.05) and in the severity of the inflammatory response (p<0.05), and improvement in the granulation tissue (p<0.05) was observed in NLT17.5/10.0 group. Mast cells count was significantly decreased in NGI and NLT17.5 groups (p<0.001), whereas no difference was observed between NLT17.5/10.0 and CTR groups (p>0.05). NLT17.5/10.0 group also showed better collagenization pattern, in comparison to NGI and NLT17.5 groups. This study suggests that the combined therapy successfully modulated the inflammatory response and collagenization in experimental model of NSGI-induced neurogenic laryngitis.
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Effect of laser and LED phototherapies on the healing of cutaneous wound on healthy and iron-deficient Wistar rats and their impact on fibroblastic activity during wound healing. Lasers Med Sci 2012; 28:799-806. [DOI: 10.1007/s10103-012-1161-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Accepted: 07/06/2012] [Indexed: 12/25/2022]
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Cafaro A, Broccoletti R, Arduino PG. Low-level laser therapy for oral mucous membrane pemphigoid. Lasers Med Sci 2012; 27:1247-50. [PMID: 22706567 DOI: 10.1007/s10103-012-1137-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 05/31/2012] [Indexed: 01/20/2023]
Affiliation(s)
- Adriana Cafaro
- Oral Medicine Section, Department of Biomedical Sciences and Human Oncology, University of Turin, Lingotto Dental School Via Nizza 230, Turin, Italy
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de Carvalho Monteiro JS, de Oliveira SCPS, de Fátima Ferreira Lima M, Sousa JAC, Pinheiro ALB, dos Santos JN. Effect of LED Red and IR Photobiomodulation in Tongue Mast Cells in Wistar Rats: Histological Study. Photomed Laser Surg 2011; 29:767-71. [DOI: 10.1089/pho.2011.3035] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
| | | | | | | | - Antônio Luiz Barbosa Pinheiro
- Center of Biophotonics, School of Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil
- National Institute of Optics and Photonics, University of São Paulo, Physics Institute of São Carlos, São Carlos, São Paulo, Brazil
- Institute of Biomedical Engineering, Unicastelo, São José dos Campos, São Paulo, Brazil
| | - Jean Nunes dos Santos
- Laboratory of Surgical Pathology, School of Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil
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Moreira MS, Velasco IT, Ferreira LS, Ariga SKK, Abatepaulo F, Grinberg LT, Marques MM. Effect of laser phototherapy on wound healing following cerebral ischemia by cryogenic injury. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2011; 105:207-15. [PMID: 22024356 DOI: 10.1016/j.jphotobiol.2011.09.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 08/09/2011] [Accepted: 09/28/2011] [Indexed: 11/29/2022]
Abstract
Laser phototherapy emerges as an alternative or auxiliary therapy for acute ischemic stroke, traumatic brain injury, degenerative brain disease, spinal cord injury, and peripheral nerve regeneration, but its effects are still controversial. We have previously found that laser phototherapy immunomodulates the response to focal brain damage. Following direct cortical cryogenic injury the effects of laser phototherapy on inflammation and repair was assessed after cryogenic injury (CI) to the central nervous system (CNS) of rats. The laser phototherapy was carried out with a 780 nm AlGaAs diode laser. The irradiation parameters were: power of 40 mW, beam area of 0.04 cm(2), energy density of 3 J/cm(2) (3s) in two points (0.12 J per point). Two irradiations were performed at 3 h-intervals, in contact mode. Rats (20 non-irradiated - controls and 20 irradiated) were used. The wound healing in the CNS was followed in 6 h, 1, 7 and 14 days after the last irradiation. The size of the lesions, the neuron cell viability percentages and the amount of positive GFAP labeling were statistically compared by ANOVA complemented by Tukey's test (p<0.05). The distribution of lymphocytes, leukocytes and macrophages were also analyzed. CI created focal lesions in the cortex represented by necrosis, edema, hemorrhage and inflammatory infiltrate. The most striking findings were: lased lesions showed smaller tissue loss than control lesions in 6 h. During the first 24 h the amount of viable neurons was significantly higher in the lased group. There was a remarkable increase in the amount of GFAP in the control group by 14 days. Moreover, the lesions of irradiated animals had fewer leukocytes and lymphocytes in the first 24 h than controls. Considering the experimental conditions of this study it was concluded that laser phototherapy exerts its effect in wound healing following CI by controlling the brain damage, preventing neuron death and severe astrogliosis that could indicate the possibility of a better clinical outcome.
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Affiliation(s)
- Maria S Moreira
- School of Dentistry, Universidade de São Paulo, São Paulo 05508-000, Brazil
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Khoshvaghti A, Zibamanzarmofrad M, Bayat M. Effect of low-level treatment with an 80-Hz pulsed infrared diode laser on mast-cell numbers and degranulation in a rat model of third-degree burn. Photomed Laser Surg 2011; 29:597-604. [PMID: 21456947 DOI: 10.1089/pho.2010.2783] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND DATA Low-level laser therapy (LLLT) has been reported to be capable of changing mast cell numbers and degranulation in experimental burns in rats. OBJECTIVE We conducted a study of the influence of LLLT on mast cells in a rat model of third-degree burn. METHODS In this study we divided 48 rats equally into two groups of 24 rats each. Third-degree burns were inflicted at three different locations on each rat in each group. The first burn site on rats in group I was treated with 890-nm pulsed laser, 75W peak, 80 Hz, 180 ns, average power 1mW, illuminated area 1 cm(2), 1 mW/cm(2), 856 sec, 0.924 J/cm(2). The second burn site on both groups of rats was treated with 0.2% nitrofurazone cream. Mast cell numbers and degranulation at each burn site on each group of rats were then assessed at 4, 8, 13, and 20 days after the infliction of burns. RESULTS Analysis of variance on day 4 showed that the total numbers of mast cells were significantly lower at the laser-treated burn sites than at other burn sites on both groups of rats. On day 8 the total numbers of mast cells were again significantly lower at the laser-treated burn sites than at other burn sites, and on day 13, the numbers of both types 1 and 2 mast cells were significantly lower at the laser-treated burn sites than at other burn sites. CONCLUSIONS We conclude that LLLT can significantly decrease total numbers of mast cells during the proliferation and remodeling phases of healing in a rat model of third-degree burn.
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Affiliation(s)
- Amir Khoshvaghti
- Anatomy Department, Medical Faculty, Artesh University of Medical Sciences, Tehran, Iran
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Simões A, de Freitas PM, Bello-Silva MS, Tunér J, de Paula Eduardo C. Laser phototherapy for Stevens-Johnson syndrome: a case report. Photomed Laser Surg 2010; 29:67-9. [PMID: 20973736 DOI: 10.1089/pho.2009.2671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Stevens-Johnson syndrome (SJS) is a life-threatening dermatosis characterized by epidermal sloughing and stomatitis. We report the case of a 7-year-old boy in whom laser phototherapy (LPT) was highly effective in reversing the effects of an initial episode of SJS that had apparently developed in association with treatment with phenobarbital for a seizure disorder. The patient was first seen in the intensive care unit (ICU) of our institution with fever, cutaneous lesions on his extremities, trunk, face, and neck; mucosal involvement of his genitalia and eyes (conjunctivitis); ulcerative intraoral lesions; and swollen, crusted, and bleeding lips. He reported severe pain at the sites of his intraoral and skin lesions and was unable to eat, speak, swallow, or open his mouth. MATERIALS AND METHODS Trying to prevent and minimize secondary infections, gastric problems, pain, and other complications, the patient was given clindamycin, ranitidine, dipyrone, diphenhydramine (Benadryl) drops, and morphine. In addition, he was instructed to use bicarbonate solution and Ketoconazole (Xylogel) in the oral cavity. Because of the lack of progress of the patient, the LPT was selected. RESULTS At 5 days after the initial session of LPT, the patient was able to eat gelatin, and on the following day, the number and severity of his intraoral lesions and his labial crusting and swelling had diminished. By 6 days after his initial session of LPT, most of the patient's intraoral lesions had disappeared, and the few that remained were painless; the patient was able to eat solid food by himself and was removed from the ICU. Ten sessions of LPT were conducted in the hospital. The patient underwent three further and consecutive sessions at the School of Dentistry, when complete healing of his oral lesions was observed. CONCLUSION The outcome in this case suggests that LPT may be a new adjuvant modality for SJS complications.
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Affiliation(s)
- Alyne Simões
- Centro de Pesquisa em Biologia Oral, Departamento de Materiais Dentários, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, Brazil.
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Pereira MCMC, de Pinho CB, Medrado ARP, Andrade ZDA, Reis SRDA. Influence of 670 nm low-level laser therapy on mast cells and vascular response of cutaneous injuries. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2010; 98:188-92. [PMID: 20117017 DOI: 10.1016/j.jphotobiol.2009.12.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2009] [Revised: 12/24/2009] [Accepted: 12/30/2009] [Indexed: 11/16/2022]
Abstract
Laser biomodulation has been getting considerable attention when it comes to its effects on the inflammatory process. Its action upon mast cells have been already studied, but none of the previous papers related the resulting effect to the inflammatory and vascular status of the wounds. Therefore, the acute inflammatory process as well as the mast cells behavior and the vascular response were analyzed under the influence of laser treatment on cutaneous wounds. Surgical procedures were performed on 60 rats divided into sham and laser groups. Low-level laser therapy was performed following surgical procedures (670 nm, 9 mW, 4 J/cm(2), 124 s). Histological specimens were analyzed for cell morphology and immunohistochemistry using anti-von Willebrand Factor and anti-Vascular Endothelial Growth Factor antibody. Laser treatment resulted in an increased acute inflammatory response in irradiated tissues; surgical wounds treated with laser therapy had increased polymorphonuclear cells, mast cells and vasodilation and lower numbers of vessels than those in control rats. Laser treatment resulted in higher expression of VEGF in irradiated tissues 6-24h post-treatment (p=0.002). It is possible to observe an amplification of acute inflammatory process during the first hours after surgical procedure in rats submitted to laser therapy.
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Moreira MS, Velasco IT, Ferreira LS, Ariga SKK, Barbeiro DF, Meneguzzo DT, Abatepaulo F, Marques MM. Effect of phototherapy with low intensity laser on local and systemic immunomodulation following focal brain damage in rat. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2009; 97:145-51. [DOI: 10.1016/j.jphotobiol.2009.09.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/24/2009] [Accepted: 09/03/2009] [Indexed: 02/07/2023]
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