Efeito da fotobiomodulação na reabilitação de pacientes com patologias traumato-ortopédicas: revisão integrativa / Efectos de la fotobiomodulación en la rehabilitación de pacientes con patologías traumatoortopédicas: revisión integrativa / Effects of photobiomodulationin the rehabilitation of patients with traumato-orthopedic pathologies: integrative review

Introdução: Fotobiomodulação corresponde à exposição de tecidos biológicos a baixos níveis de luz vermelha e infravermelha, esta terapia favorece a reabilitação de diferentes tecidos e que pode ser utilizada para a melhora da prática clínica nas diferentes atuações da fisioterapia, como por exemplo, no tratamento dos acometimentos musculoesqueléticos e inflamatórios. Objetivo: Identificar os benefícios da fotobiomodulação empregados na reabilitação de pacientes nas diferentes patologias traumato-ortopédicas. Metodologia:Trata-se de uma revisão integrativa com busca online nas plataformas de dados: Medline e PubMed. Os descritores foram: fotobiomodulação, taumato-ortopedia e reabilitação. As línguas selecionadas foram: Português, Inglês e Espanhol, entre os anos de 2018 a 2022.Resultados:A descrição dos achados nos ensaios clínicos analisados mostra que a terapia de fotobiomodulação apresenta diferentes usos na prática clínica e que seu uso produz efeito analgésico, anti-inflamatório e regenerativo nos distúrbios musculoesqueléticos. Conclusões:De acordo com a revisão dos artigos, pôde-se perceber que a terapia por fotobiomodulação confirma seus benefícios e eficácia, portando, se fazendo positiva na atuação traumato-ortopédica, gerando resultados significativos quando comparada a outros recursos (AU).

Introduction: Photobiomodulationcorresponds to the exposure of biological tissues to low levels of red and infrared light, this therapy favors the rehabilitation of different tissues and can be used to improve clinical practice in different actions of physiotherapy, such as, for example, in the treatment of musculoskeletal and inflammatory disorders. Objective: To identify the benefits of photobiomodulation used in the rehabilitation of patients with different traumato-orthopedic pathologies. Methodology:This is an integrative review with online search on data platforms: Medline and PubMed. The descriptors were: photobiomodulation, thaumato-orthopedics and rehabilitation. The selected languages were: Portuguese, English and Spanish, from 2018 to 2022. Results: The description of the discovers in the analyzed clinical trials shows that photobiomodulation therapy has different uses in clinical practice and that its use produces analgesic, anti-inflammatory and regenerative effects in musculoskeletal disorders. Conclusions:According to the review of the articles, it could be seen that photobiomodulation therapy confirms its benefits and effectiveness, therefore, becoming positive in the trauma-orthopedic performance, generating significant results when compared to other resources (AU).

Introducción: La fotobiomodulacióncorresponde a la exposición de tejidos biológicos a bajos niveles de luz roja e infrarroja, esta terapia estimula la rehabilitación de diferentes tejidos y puede ser utilizada para mejorar la práctica clínica en diferentes áreas de fisioterapia, como por ejemplo, en tratamiento de Trastornos musculoesqueléticos e inflamatorios. Objetivo: Identificar los beneficios de la fotobiomodulación utilizada en la rehabilitación de pacientes con diferentes patologías traumato-ortopédicas. Metodología: Esta es una revisión integradora con búsqueda en línea en plataformas de datos: Medline y PubMed. Los descriptores fueron: fotobiomodulación, taumato-ortopedia y rehabilitación. Los idiomas seleccionados fueron: portugués, inglés y español, entre los años 2018 a 2022. Resultados: La descripción de los hallazgos en los ensayos clínicos analizados muestra que la terapia de fotobiomodulación tiene diferentes usos en la práctica clínica y que su uso produce efectos analgésicos, antiinflamatorios y regenerador en trastornos musculoesqueléticos. Conclusiones: De acuerdo con la revisión de los artículos, se pudo apreciar que la terapia de fotobiomodulación confirma sus beneficios y efectividad, por lo tanto, tornándose positiva en el desempeño trauma-ortopédico, generando resultados significativos cuando se compara con otros recursos (AU).

Dosimetria do laser de baixa intensidade para cicatrização de úlcera venosa: um protocolo de revisão sistemática / Low-level laser dosimetry for venous ulcer healing: a protocol for systematic review

OBJETIVO: Analisar a dosimetria do laser de baixa intensidade no processo de cicatrização de úlcera venosa. MÉTODO: Trata-se de um protocolo de revisão sistemática registrado no International Prospective Register of Systematic Reviews (PROSPERO) sob código de registro CRD420211256286. Serão realizadas buscas por evidências científicas em 11 bases de dados, utilizando os idiomas português, inglês e espanhol. A exportação das publicações seguirá as etapas de identificação e seleção dos estudos, e extração dos dados. As divergências serão resolvidas por consenso dos dois revisores, e caso persistam, um terceiro revisor será consultado para decidir sobre a inclusão do material. A ferramenta Risk of Bias 2 (RoB 2) será utilizada para avaliar o risco de viés dos estudos dos ensaios clínicos randomizados, ao passo que a ferramenta Risk of Bias in Non-randomized Studies of Interventions (ROBINS-I) será utilizada para avaliar o risco de viés dos ensaios clínicos não randomizados. A análise crítica dos materiais selecionados quanto à dosimetria do laser de baixa intensidade para cicatrização de úlcera venosa resultará em uma síntese narrativa, sem metanálise.

OBJECTIVE: To analyze the dosimetry of low-level laser therapy in the healing process of venous ulcers. METHOD: This is a protocol for systematic review registered in the International Prospective Register of Systematic Reviews under registry code CRD420211256286. Articles will be searched in 11 databases using Portuguese, English, and Spanish languages. The export of publications will follow the steps of study identification, selection, and data extraction. Disagreements will be resolved by consensus among reviewers; if they persist, a third reviewer will be consulted to decide whether to include the material. The Risk of Bias 2 (RoB 2) tool will be used to assess the validity of randomized clinical trials, while the Risk of Bias in Non-randomized Studies of Interventions (ROBINS-I) tool will be used to assess the risk of bias in non-randomized clinical trials. The critical analysis of selected materials on dosimetry of low-level laser therapy for venous ulcer healing will result in a narrative synthesis without meta-analysis.

Providing inoculum for Didymella bryoniae studies: the effect of light spectrum and storing at low temperature

Abstract The in vitro sporulation of Didymella bryoniae is of great importance for studies that require pure inoculum and in large quantities. Thus, the objectives of this study were to identify the best condition for D. bryoniae sporulation combining different light spectra (UV-A or UV-B light, white light, and continuous dark), with distinct culture media (PDA, V8, ML, and PDAB) and, to evaluate fungus survivability stored at -20°C over time. The fungus samples were only able to sporulate when subjected to the UV-B light treatment, regardless of the culture medium. The highest appearance of spores conidium type was observed in the PDAB medium, and the lowest production occurred in the ML medium. Reproductive structures, such as perithecia and pycnidia, were observed in all culture media. However, there was considerable variation in the amount of each structure between the different culture media. The ML and V8 media showed a greater number of perithecia and the PDA and PDAB media presented a greater proportion of pycnidia compared to perithecia. The storage duration at -20°C did not affect mycelial growth or mycelial growth rate. In conclusion, the UV-B light is essential for D. bryoniae in vitro sporulation. Moreover, the culture medium composition influences the type of fungal structure produced, as well as spores size and quantity. Freezing at -20°C is an efficient technique that can be used to store D. bryoniae for at least five months without loss of viability.

Resumo A esporulação de Didymella bryoniae in vitro é de grande importância para estudos que requerem inóculo puro e em grandes quantidades. Assim, os objetivos deste estudo foram identificar a melhor condição para esporulação de D. bryoniae combinando diferentes espectros de luz (luz UV-A ou UV-B, luz branca e escuro contínuo) com distintos meios de cultura (PDA, V8, ML e PDAB) e, avaliar a sobrevivência do fungo armazenado a -20°C ao longo do tempo. As amostras de fungo só esporularam quando submetidas ao tratamento com luz UV-B, independentemente do meio de cultura. Maior aparecimento de esporos do tipo conídio foi observado no meio PDAB, e a menor produção ocorreu no meio ML. Estruturas reprodutivas, como peritécios e picnídeos, foram observadas em todos os meios de cultura. No entanto, houve uma variação considerável na quantidade de cada estrutura entre os diferentes meios de cultura. Os meios ML e V8 apresentaram maior número de peritécios e os meios PDA e PDAB apresentaram maior proporção de picnídeos em relação aos peritécios. A duração do armazenamento a -20°C não afetou o crescimento micelial ou a taxa de crescimento micelial. Em conclusão, a luz UV-B é essencial para a esporulação de D. bryoniae in vitro. Além disso, a composição do meio de cultura influencia o tipo de estrutura fúngica produzida, bem como o tamanho e a quantidade dos esporos. O congelamento a -20°C é uma técnica eficiente que pode ser usada para armazenar D. bryoniae por pelo menos cinco meses sem perda de viabilidade

Advances in research on relationship between indoor artificial light at night and human health / 环境与职业医学

With the acceleration of global urbanization, the intensity and coverage of artificial light at night (ALAN) are increasing, and its service duration is obviously prolonged. ALAN exposure is not only related to the occurrence and development of cardiovascular, metabolic, sleep, myopia, and mental diseases, but also may induce cancer. Previous studies have focused on the health effects of outdoor ALAN, but people spend more than 80% of their lives indoors, hence it is of great significance to understand the relationship between indoor ALAN and population health to create a healthy indoor environment and protect the health of the population.

Providing inoculum for Didymella bryoniae studies: the effect of light spectrum and storing at low temperature / Fornecendo inóculo para estudos de Didymella bryoniae: o efeito do espectro de luz e armazenamento em baixa temperatura

Abstract The in vitro sporulation of Didymella bryoniae is of great importance for studies that require pure inoculum and in large quantities. Thus, the objectives of this study were to identify the best condition for D. bryoniae sporulation combining different light spectra (UV-A or UV-B light, white light, and continuous dark), with distinct culture media (PDA, V8, ML, and PDAB) and, to evaluate fungus' survivability stored at -20°C over time. The fungus samples were only able to sporulate when subjected to the UV-B light treatment, regardless of the culture medium. The highest appearance of spores conidium type was observed in the PDAB medium, and the lowest production occurred in the ML medium. Reproductive structures, such as perithecia and pycnidia, were observed in all culture media. However, there was considerable variation in the amount of each structure between the different culture media. The ML and V8 media showed a greater number of perithecia and the PDA and PDAB media presented a greater proportion of pycnidia compared to perithecia. The storage duration at -20°C did not affect mycelial growth or mycelial growth rate. In conclusion, the UV-B light is essential for D. bryoniae in vitro sporulation. Moreover, the culture medium composition influences the type of fungal structure produced, as well as spores' size and quantity. Freezing at -20°C is an efficient technique that can be used to store D. bryoniae for at least five months without loss of viability.

Resumo A esporulação de Didymella bryoniae in vitro é de grande importância para estudos que requerem inóculo puro e em grandes quantidades. Assim, os objetivos deste estudo foram identificar a melhor condição para esporulação de D. bryoniae combinando diferentes espectros de luz (luz UV-A ou UV-B, luz branca e escuro contínuo) com distintos meios de cultura (PDA, V8, ML e PDAB) e, avaliar a sobrevivência do fungo armazenado a -20°C ao longo do tempo. As amostras de fungo só esporularam quando submetidas ao tratamento com luz UV-B, independentemente do meio de cultura. Maior aparecimento de esporos do tipo conídio foi observado no meio PDAB, e a menor produção ocorreu no meio ML. Estruturas reprodutivas, como peritécios e picnídeos, foram observadas em todos os meios de cultura. No entanto, houve uma variação considerável na quantidade de cada estrutura entre os diferentes meios de cultura. Os meios ML e V8 apresentaram maior número de peritécios e os meios PDA e PDAB apresentaram maior proporção de picnídeos em relação aos peritécios. A duração do armazenamento a -20°C não afetou o crescimento micelial ou a taxa de crescimento micelial. Em conclusão, a luz UV-B é essencial para a esporulação de D. bryoniae in vitro. Além disso, a composição do meio de cultura influencia o tipo de estrutura fúngica produzida, bem como o tamanho e a quantidade dos esporos. O congelamento a -20°C é uma técnica eficiente que pode ser usada para armazenar D. bryoniae por pelo menos cinco meses sem perda de viabilidade

Review and Progress in the Treatment of Renal Light Chain Amyloidosis / 罕见病研究

Renal light chain amyloidosis (AL amyloidosis) had poor prognosis before the 21st century. However, the treatment of AL amyloidosis has made great progress in the last decade. We reviewed traditional treatments of AL amyloidosis such as alkylating agents, proteasome inhibitors, and recent advances such as monoclonal antibodies. Bortezomib improved the hematological response and survival effectively of the patients, and the combination of Daratumumab brings faster and deeper hematological response, increasing the response rate of target organs such as the kidneys and heart. The renal response was significant higher in the patients with the therapy of Daratumumab, part of them could achieve very good partial response or better renal response. Autologous hematopoietic stem cell transplantation(auto-HSCT)improves hematological as well as organ response, and could be the first choice among eligible patients. Kidney transplantation is a feasible option for those with good hematological response.

Effects of light regulation on the synthesis of secondary metabolites in medicinal plants / 药学实践杂志

Secondary metabolites of medicinal plants are extremely important to human health because of their special pharmacological activities or efficacy. They are the main source of drugs, health care products, and cosmetics. As human beings continue to pursue health and longevity, the demand in the pharmaceutical market continues to grow. It becomes especially important to improve the production and quality of secondary metabolites of medicinal plants. Plant secondary metabolites are a kind of adaptation of plants to their environment and are the result of the interaction between plants and biotic and abiotic factors during the long-term evolution process. The production and accumulation of secondary metabolites in medicinal plants are mainly affected by plant genetic factors and environmental factors. Among them, light environment is extremely important for their synthesis. Therefore, light regulation has long been a research focus for many scholars in China and abroad. In this article, we the recent research progress on the effects of light regulation on the secondary metabolites of medicinal plants were reviewed, mainly focusing on the effects of light quality, light intensity and photoperiod, in order to provide theoretical basis and practical guidance for the efficient production of secondary metabolites with important pharmacological activities.

Establishment and verification of a real-time quantitative PCR method for determination of exogenous antibody gene copy number in CHO cells / 中国生物制品学杂志

@#Objective To establish a real-time quantitative PCR method using SYBR GreenⅠto detect the copy numbers of light chain(LC)and heavy chain(HC)of exogenous antibody gene in CHO cells,and verify and preliminarily apply this method.Methods With the B2m(β2-microglobulin)expressed stably in CHO cells as the internal reference gene,suitable primers of LC,HC genes and internal reference gene were designed respectively,and the reaction system and program of the real-time quantitative PCR method were determined. The established method was verified for the specificity,linearity,precision and durability,and used to detect the copy numbers of LC and HC genes in the recombinant cell lines of working cell bank(WCB)and cells of different passages.Results The primers of exogenous genes and internal reference gene showed specific binding to the target fragments;The efficiency of primer amplification for the B2m gene,LC gene,and HC gene was 106. 7%,106. 3% and 99. 1%,respectively,and the correlation coefficients of the linear equations were all greater than 0. 99 with a good linear relationship;The relative standard deviations(RSDs)of precision verification were all less than 1%;Few cycles of freeze-thaw in a short period had little effect on the detection results. The copy numbers of LC and HC genes in different generations of recombinant cell lines detected by the established method showed no obvious changes.Conclusion A real-time quantitative PCR method for the determination of the copy number of exogenous genes in CHO cells was successfully established with good specificity,linearity,precision and durability,which provides a reference for detecting the copy number of exogenous genes expressed in other CHO cell lines

Prevention and treatment of lipoic acid-niacin on blue-light-induced retinal damage in rats / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To investigate the preventive effect and optimal drug dose of lipoic acid-niacin(N2L)against blue light-induced retinal damage in SD rats, and to explore its possible protective mechanism.METHODS: A total of 36 specific pathogen free-grade male SD rats of 150-200 g were selected and randomly divided into normal control group, blue light injury group, N2L low-dose group(1.0 mg/kg), N2L medium-dose group(2.5 mg/kg), N2L high-dose group(5.0 mg/kg), and physiological saline group, with 6 rats in each group. The normal control group was reared in a 12 h dark and light cycle, and the rest of the groups received 9 h of daily light exposure, 3 h of blue light irradiation with a wavelength of 455 nm and an intensity of 3000±50 lx, and 12 h of darkness to establish the injury model, and were exposed to light exposure for 14 d. For 14 consecutive durations, a 1 mL dose of the corresponding drug was injected intraperitoneally. The rats were reared for another 5 d with a regular 12 h light-dark cycle and were examined by electroretinography. Specimens were prepared by over anesthesia, HE staining, and the thickness of the outer nuclear layer was observed under a optical microscope; superoxide dismutases(SOD)activity was detected by CheKineTM SOD Activity Assay Kit; and the retinal Caspase-3, quinone oxidoreductase 1(NQO1), glutathione S transferase(GST), Bcl-2, and Bax protein expression in rat retina were detected by Western blot.RESULTS: The amplitude of b-wave in dark-vision ERG 3.0 and 10.0(cd·s)/m2 stimulated light, b-wave in bright-vision ERG 3.0(cd·s)/m2 stimulated light, and the amplitude of the 2nd wave peak of oscillatory potential were significantly lower in blue light injury group than that in the normal control group(all P<0.01), while the amplitude was significantly higher in the N2L medium-dose group than in the blue light injury group(all P<0.05), and was not statistically different from that of the normal control group; the thickness of the retina in the blue light injury group was decreased in the ONL compared with that of the normal control group(P<0.001), while in the N2L medium dose group, it was thicker than that of the blue light injury group(P<0.001), and there was no statistically significant difference from the normal control group; SOD activity was significantly higher in the N2L medium-dose group than in the remaining 5 groups(P<0.05); the expression of Caspase-3, Bax, and NQO1 in the blue light injury group was higher than that of the normal control group(all P<0.01), and expression of Bax and Caspase-3 was significantly lower in the N2L medium-dose group compared with the blue light injury group(all P<0.001), whereas GST, NQO1 and Bcl-2 were significantly increased(all P<0.01).CONCLUSION:A concentration of 2.5 mg/kg N2L can effectively antagonize the damaging effect of blue light on the retina of SD rats, and it is expected to be a preventive and curative drug for it.

Photobiomodulation therapy as a new hope therapy for retinitis pigmentosa: a systematic review / Terapia de fotobiomodulação como nova terapia de esperança para retinite pigmentosa: uma revisão sistemática

ABSTRACT Retinitis pigmentosa is one of the leading causes of hereditary blindness in developed countries and unfortunately there is currently no cure. Photobiomodulation therapy can penetrate the retina and optic nerve and restore the function of damaged mitochondria as an intracellular target. This study is proposed to review and analyze photobiomodulation as a strategy that has the potential to be a new hope therapy and non-invasive treatment for retinitis pigmentosa in the long term. PubMed® and Google Scholar were used to perform a systematic review of photobiomodulation as a therapy for retinitis pigmentosa. Using PRISMA 2020 Guidelines, we include seven studies in this review. The inclusion criteria for each study were as follows: the study documented the use of photobiomodulation therapy for retinitis pigmentosa, was conducted in human eyes or animals' eye, its full text was in English, and it published in the last 10 years. We anticipated that most studies would be experimental design, we evaluated the quality of eligible studies using relevant items from the ROBINS-I, which is the recommended tool to evaluate experimental study. There is a clinical improvement in visual acuity and visual fields. Further eye examination showed functional and outer nuclear layer preservation, decline waveforms of electroretinogram slower than control, disruption of retinal pigment epithelium, and preserved photoreceptor nuclei twice thicker than control (p < 0.05). Photobiomodulation also increases retinal mitochondrial function and maintains mitochondrial redox state, revealing significant recovery of photoreceptors' cell function. Photobiomodulation showed significant change in clinical improvement, mitochondrial repair, and retinal layer thickening; thus, photobiomodulation can be a new hope for therapeutic strategies for retinitis pigmentosa. Several studies only have a few participants, so it does not provide a long-term outcome in retinitis pigmentosa.

RESUMO A retinite pigmentosa é uma das principais causas de cegueira hereditária em países desenvolvidos e, infelizmente, não há cura atualmente. A terapia de fotobiomodulação pode penetrar na retina e no nervo óptico e restaurar a função das mitocôndrias danificadas como alvo intracelular. Este estudo propõe-se a rever e a analisar a fotobiomodulação como estratégia que tem potencial para ser uma nova esperança terapêutica e tratamento não invasivo para a retinite pigmentosa a longo prazo. PubMed® e Google Scholar foram usados para realizar uma revisão sistemática da fotobiomodulação como terapia para retinite pigmentosa. Usando as diretrizes PRISMA de 2020, incluímos sete estudos nesta revisão. Os critérios de inclusão para cada estudo foram os seguintes: que tivesse documentado o uso de terapia de fotobiomodulação para retinite pigmentosa; o procedimento tivesse sido realizado em olhos humanos ou olhos de animais, e o texto fosse completo, em inglês, e publicado no último 10 anos. Previmos que a maioria dos estudos seria de desenho experimental, avaliamos a qualidade dos estudos elegíveis usando itens relevantes do ROBINS-I, que é a ferramenta recomendada para avaliação de estudo experimental. Houve melhora clínica da acuidade visual e dos campos visuais. O exame oftalmológico adicional mostrou preservação funcional e da camada nuclear externa; declínio das formas de onda do eletrorretinograma mais lento que o controle; ruptura do epitélio pigmentar da retina e núcleos fotorreceptores preservados duas vezes mais espessos que o controle (p < 0,05). A fotobiomodulação também aumenta a função mitocondrial da retina e mantém o estado redox mitocondrial, revelando uma recuperação significativa da função celular dos fotorreceptores. A fotobiomodulação mostrou mudança significativa na melhora clínica, reparo mitocondrial e espessamento da camada retiniana. Assim, a fotobiomodulação pode ser uma nova esperança para estratégias terapêuticas para retinite pigmentosa. Vários estudos têm apenas alguns participantes e, por isso, não fornecem um resultado a longo prazo na retinite pigmentosa.

Photobiomodulation for Oral Mucositis - A Microcosting and Budget Impact Analysis from a Brazilian Perspective

ABSTRACT Objective: To measure the costs of preventive and therapeutic protocols of Photobiomodulation (PBM) for oral mucositis (OM) and their budgetary impact on Brazil's Ministry of Health (BMH). Material and Methods: A partial economic analysis was performed to estimate the costs using a bottom-up approach from a social perspective. Monetary values were assigned in Brazilian reais (BRL). The costs of the preventive protocol were calculated for five, 30, and 33 consecutive PBM sessions, depending on the antineoplastic treatment instituted. The costs of the therapeutic protocol were calculated for 5 or 10 sessions. The annual financial and budgetary impact was calculated considering the groups of oncologic patients with a higher risk of development of OM, such as those with head and neck and hematological cancer and pediatric patients. Results: The cost of a PBM session was estimated at BRL 23.75. The financial impact of providing one preventive protocol per year for all oncologic patients would be BRL 14,282,680.00, 0.030% of the estimated budget for hospital and outpatient care of the BMH in 2022. The financial and budgetary impacts of providing one treatment for OM for all patients in one year would be BRL 2,225,630.31 (0.005%, most optimistic scenario) and BRL 4,451,355.63 (0.009%, most pessimistic scenario). Conclusion: The budgetary impact of implementing PBM protocols in the Brazilian Healthcare System is small, even in a pessimistic scenario.

Combination of phototherapy for treatment of labial necrotizing lesion: case report

Lip necrotizing lesions are painful, complex to heal, and negatively impact the patient's orofacial condition. The present study reports a clinical case of a necrotizing lesion on the lower lip in a 38-year-old male patient, previously healthy, five days after receiving the first dose of the SARS-COV-2 vaccine, with an initial diagnosis of labial herpes zoster, with secondary infection and unsatisfactory response to clinical treatment. After debridement of the necrotic tissue, followed by a combination of antimicrobial photodynamic therapy (aPDT), photobiomodulation therapy (PBMT) and hydrofiber dressing with silver, the patient evolved with complete healing of the lip lesion and satisfactory restoration of orofacial functions after 7 days. According to the present case report, this combination of phototherapy modalities suggests to be a promising tool for the treatment of necrotizing labial lesions.

Photobiomodulation effects on synovial morphology, iNOS gene, and protein expression in a model of acute inflammation

ABSTRACT Purpose: To evaluate morphological aspects and inducible nitric oxide synthase (iNOS) gene and protein expression in a model of acute inflammation. Methods: Thirty-six female Wistar rats were assigned into three groups: control (saline, n = 12), sham (arthritis, n = 12), and PBM (arthritis and photobiomodulation, n = 12). Arthritis induction was performed with 200 μg of intra-articular Zymosan in sham and PBM animals. PBM was performed 24 h after induction with a laser device (λ = 808 nm, 25 mW of nominal power, fluence of 20 J/cm2, beam area of 0.02 mm2, time of 33 s, total energy of 0.825 J) with punctual and single dose application. Morphological analysis of joint structure (HE) and immunohistochemistry (anti-iNOS antibody) were performed on knee samples, and synovial tissue was submitted to RNA extraction, cDNA synthesis and gene expression analysis by quantitative polymerase chain reaction. Statistical analyses were performed with p < 0.05. Results: It was observed an increase in the thickness of the synovial lining epithelium and inflammatory infiltrate in sham compared to PBM. Gene expression analysis showed higher iNOS expression in PBM, and iNOS protein expression decreased in PBM compared to sham. Conclusions: Photobiomodulation decreased inflammation in PBM animals, upregulated iNOS gene expression, however down egulated protein expression compared to sham.

Concordance rate between oligoclonal bands and the Kappa index in patients with suspected multiple sclerosis (MS) / Concordância entre bandas oligoclonais e o índice Kappa em pacientes com suspeita de esclerose múltipla (EM)

Abstract Background Oligoclonal bands (OCBs) and Kappa free light chains (FLCs) in the cerebrospinal fluid (CSF) are sensitive markers of intrathecal immunoglobulin (Ig)G synthesis in patients with multiple sclerosis. Objective To evaluate the concordance rate between OCBCs and the Kappa index (KI) in patients with suspected multiple sclerosis (MS). Methods Patients with suspected MS were referred to a specialized CSF laboratory as part of their diagnostic investigation. Paired CSF and serum samples were collected and submitted to detection of OCBs and determination of the KI. Positive and negative results were determined with both methods, and the percentage of agreement between them was established. Results In total, 171 serum and CSF samples from 171 patients were included in the analysis. The mean age of the patients was of 40 ± 14.2 years; 18.9% of them were male, and 81.1% were female. The OCBs and KI presented concordant results in 161 (94.2%) samples: in 74 (43.3%), both were positive, and in 87 (50.9%), both were negative. In 10 cases, the results were discrepant: KI positive/OCB negative in 8 and OCB positive/KI negative in 2 cases. Conclusion The KI and OCBs presented high concordance level. Currently, the detection of OCBs in the CSF is the standard method for MS diagnosis, but it is time-consuming, and its visual interpretation can be difficult. The results suggest that the KI is a good alternative for the detection of intrathecal immunoproduction in cases of suspected MS.

Resumo Antecedentes Bandas oligoclonais (BOCs) e cadeias leves de imunoglobulina (free light chains, FLCs, em inglês) Kappa no líquido cefalorraquidiano (LCR) são marcadores sensíveis da síntese intratecal de imunoglobulina (Ig)G em pacientes com esclerose múltipla (EM). Objetivo Avaliar a taxa de concordância entre BOCs e o índice Kappa (IK) em pacientes com suspeita de EM. Métodos Pacientes com suspeita de EM foram encaminhados a um laboratório especializado em LCR como parte de sua investigação diagnóstica. Amostras pareadas de LCR e soro foram coletadas e investigadas quanto à presença de BOCs e submetidas à determinação do IK. Resultados positivos e negativos foram determinados com ambos os métodos, e estabeleceu-se o percentual de concordância entre eles. Resultados Ao todo, 171 amostras de soro e LCR de 171 pacientes foram incluídas na análise. A média de idade dos pacientes foi de 40 ± 14,2 anos; 18,9% deles eram do sexo masculino, e 81,1%, do sexo feminino. Resultados concordantes entre as BOCs e o IK foram observados em 161 (94,2%) amostras: em 74 (43,3%), ambos foram positivos, e em 87 (50,9%), ambos foram negativos. Em 10 casos, os resultados foram discrepantes: IK positivo/BOC negativo em 8, e BOC positivo/IK negativo em 2. Conclusão Observou-se alto nível de concordância entre o IK e as BOCs. A detecção de BOCs no LCR é atualmente o método padrão para o diagnóstico de EM, mas é demorado, e sua interpretação visual pode ser difícil. Os resultados sugerem que o IK pode ser uma alternativa para a detecção de imunoprodução intratecal em casos de suspeita de EM.

Effect of photobiomodulation therapy on pain perception during anesthetic puncture of dental local anesthesia: A systematic review

Abstract Background Local anesthetic puncture is often related to the experience of pain. This study aimed to systematically analyze the literature on changes in pain perception during the anesthetic puncture of dental local anesthesia after Photobiomodulation Therapy (PBMT). Material and methods An electronic search was performed in eight primary databases (Embase, LILACS, BBO, LIVIVO, MedLine via PubMed, SciELO, Scopus, and Web of Science) and three additional ones (EASY, Google Scholar, and OATD) to partially capture the "gray literature". The PICO strategy was used to identify randomized clinical trials evaluating the analgesic effect of PBMT in the anesthetic puncture site of dental local anesthesia compared to placebo or control groups, without restrictions on publication language and year. Two reviewers extracted the data and assessed the individual risk of bias of the eligible studies using the Cochrane Collaboration Risk of Bias Tool version 2.0. Results The electronic search found 3,485 records, of which eight met the eligibility criteria and were included in the qualitative synthesis. The studies were published from 2011 to 2022. None of the included studies had a low risk of bias. PBMT groups showed no significant difference in pain scores compared to placebo and control groups of most studies. Conclusion Based on a low to very low certainty of evidence, PBMT seems to have no effect on pain perception during anesthetic puncture in patients undergoing dental local anesthesia.

Efeitos imediatos da fotobiomodulação na produção de saliva / Immediate effects of photobiomodulation on saliva production

RESUMO Objetivo Verificar os efeitos imediatos da fotobiomodulação na produção do fluxo salivar e a correlação dos dados demográficos, antropométricos e de uso de medicamentos. Método Participaram do estudo 100 indivíduos saudáveis, com idade entre 18 e 76 anos (média 27,2 anos), divididos de forma randomizada em grupo experimental e grupo placebo. Foram realizadas as avaliações das medidas antropométricas, autopercepção da produção de saliva e a sialometria. Na sequência, realizou-se a irradiação do LASER no comprimento de onda infravermelho (808 nanômetros) com 100 miliwatts (mw) de potência em cinco pontos intraorais: nas glândulas sublingual e bilateralmente nas submandibulares e parótidas, nas doses 9, 18 e 24 joules (J). A sialometria foi repetida após cada aplicação. O grupo controle recebeu os mesmos procedimentos com equipamento placebo. Resultados Houve associação estatística na autopercepção de redução da saliva no grupo experimental para a dose de 24J e na sialometria e na redução do fluxo salivar para as doses 18J e 24J e aumento para 9J, em ambos os grupos. Não houve associação quando comparado entre os grupos experimental e placebo. A análise de regressão multinomial múltipla revelou que a redução ou o aumento do fluxo salivar independe das variáveis demográficas, antropométricas e uso de medicamentos. Conclusão A ação bioinibitória da fotobiomodulação sobre as glândulas salivares saudáveis ocorreu em dose de 18J e 24J, já ação bioestimulante na dose 9J, independe das variáveis demográficas, antropométricas e uso de medicamentos. A autopercepção da redução do fluxo salivar ocorreu em 24J.

ABSTRACT Purpose To verify the immediate effects of photobiomodulation on the production of salivary flow and the correlation of demographic, anthropometric and medication use data. Methods The study included 100 healthy individuals, aged between 18 and 76 years (mean 27.2 years), randomly split into an experimental group and a placebo group. Assessments of anthropometric measurements, self-perception of saliva production and sialometry were performed. Next, LASER irradiation was carried out at an infrared wavelength (808 nanometers) with 100 milliwatts (mw) of power at five intraoral points: on the sublingual glands and bilaterally on the submandibular and parotid glands, at doses of 9, 18 and 24 joules (J). Sialometry was repeated after each application. The control group received the same procedures with placebo equipment. Results There was a statistical association in the self-perception of reduced saliva in the experimental group for the 24J dose and in sialometry and in the reduction in salivary flow for the 18J and 24J doses and an increase to 9J, in both groups. There was no association when comparing the experimental and placebo groups. Multiple multinomial regression analysis revealed that the reduction or increase in salivary flow is independent of demographic, anthropometric and medication use variables. Conclusion The bioinhibitory action of photobiomodulation on healthy salivary glands occurred at a dose of 18J and 24J, while the biostimulant action happened at a dose of 9J, regardless of demographic, anthropometric variables and medication use. The self-perception of reduced salivary flow occurred at 24J.

Antiangiogenic activity of photobiomodulation in experimental model using chorioallantoic embryonic membrane of chicken eggs / Atividade antiangiogênica da fotobiomodulação em modelo experimental usando membrana embrionária corioalantóide de ovos de galinhas

ABSTRACT Purpose: The purpose of this study was to investigate the vascular effects of photobiomodulation using a light-emitting diode on the chorioallantoic embryonic membrane of chicken eggs grouped into different times of exposure and to detect the morphological changes induced by the light on the vascular network architecture using quantitative metrics. Methods: We used a phototherapy device with light-emitting diode (670 nm wavelength) as the source of photobiomodulation. We applied the red light at a distance of 2.5 cm to the surface of the chorioallantoic embryonic membrane of chicken eggs in 2, 4, or 8 sessions for 90 s and analyzed the vascular network architecture using AngioTool software (National Cancer Institute, USA). We treated the negative control group with 50 μl phosphate-buffered-saline (pH 7.4) and the positive control group (Beva) with 50 μl bevacizumab solution (Avastin, Produtos Roche Químicos e Farmacêuticos, S.A., Brazil). Results: We found a decrease in total vessel length in the Beva group (24.96% ± 12.85%) and in all the groups that received 670 nm red light therapy (2× group, 34.66% ± 8.66%; 4× group, 42.42% ± 5.26%; 8× group, 38.48% ± 6.96%), compared with the negative control group. The fluence of 5.4 J/cm2 in 4 sessions (4×) showed more regular vessels. The number of junctions in the groups that received a higher incidence of 670 nm red light (4× and 8×) significantly decreased (p<0.0001). Conclusion: Photo-biomodulation helps reduce vascularization in chorioallantoic embryonic membrane of chicken eggs and changes in the network architecture. Our results open the possibility of future clinical studies on using this therapy in patients with retinal diseases with neovascular components, especially age-related macular degeneration.

RESUMO Objetivo: investigar os efeitos vasculares da foto-biomodulação com diodo emissor de luz utilizando membrana embrionária corioalantóide de ovos de galinhas em grupos com diferentes tempos de exposição e detectar as alterações morfológicas por meio de métricas quantitativas promovidas pela luz na arquitetura da rede vascular. Métodos: Um aparelho de fototerapia com diodo emissor de luz no comprimento de onda de 670 nm foi usado como fonte de fotobiomodulação. A luz vermelha foi aplicada a uma distância de 2,5 cm da superfície da membrana embrionária corioalantóide em 2, 4 ou 8 sessões de 90 s a arquitetura da rede vascular foi analisada por meio do software AngioTool (National Cancer Institute, USA). Usamos um grupo controle negativo tratado com 50 µL de solução salina tamponada com fosfato (PBS) pH 7,4 e um grupo controle positivo (Beva) tratado com 50 µL de solução de bevacizumabe (Avastin, Produtos Roche Químicos e Farmacêuticos S.A., Brasil). Resultados: Uma diminuição no comprimento total do vaso foi detectada para o grupo Beva (24,96 ± 12,85%), e para todos os grupos que receberam terapia de luz vermelha de 670 nm, 34,66 ± 8,66% (2x), 42,42 ± 5,26% (4x) e 38,48 ± 6,96% (8x) em comparação ao grupo controle. A incidência de 5,4 J/cm2 em 4 sessões (4x) mostrou vasos mais regulares. A redução foi mais intensa nos grupos que receberam maior incidência de luz vermelha de 670 nm (4x e 8x). Conclusão: A fotobiomodulação contribui para a redução da vascularização nos vasos da membrana embrionária corioalantóide de ovos de galinhas e mudanças na arquitetura da rede. Os achados deste experimento abrem a possibilidade de considerar um estudo clínico usando esta terapia em pacientes com doenças retinais com componentes neovasculares, especialmente degeneração macular relacionada à idade.

Ultraviolet-A absorbance analysis in thin porcine corneas pre-and post-crosslinking

ABSTRACT Purpose: To determine the absorbance coefficient of the thin porcine cornea to ultraviolet-A radiation (365 nm) submitted for crosslinking. Methods: This in vitro, benchtop experiment using cadaver tissue study analyzed 12 porcine corneal lamellas, which were obtained using a microkeratome after mechanical de-epithelization and separated into three thickness groups: 180, 300, and 360 μm. The corneal thickness values were measured by anterior-segment optical coherence tomography. All lamellas had ultraviolet-A (365 nm) absorbance measured with a 96-well plate spectrophotometer using an ultraviolet transparent microplate before riboflavin instillation and preand post-crosslinking according to the Dresden protocol. Results: The ultraviolet absorbance profiles of the 180, 300, and 360 μm groups were obtained as α-coefficients of 12.85, 76.55, and 120.27, respectively. A theoretical formula was calculated though a statistical analysis that demonstrated the correlation between stromal lamellar thickness and ultraviolet absorbance. Conclusions: Corneal thickness and ultraviolet-A spectral absorbance of corneal lamellas showed linear correlation. These findings can potentially contribute to the optimization of ultraviolet-A application during crosslinking, making the treatment of corneas with thickness <400 μm safe and personalized energy delivery for each corneal thickness.

Preclinical study of experimental burns treated with photobiomodulation and Human Amniotic Membrane, both isolated and associated / Estudo pré-clínico de queimaduras experimentais tratadas com fotobiomodulação e membrana amniótica humana, isoladas e associadas / Estudio preclínico de quemaduras experimentales tratadas con fotobiomodulación y membrana amniótica humana, solas y combinadas

Abstract Objective: to evaluate the effect of photobiomodulation with low-level 660 nm laser alone or associated with Human Amniotic Membrane in the repair of partial-thickness burns in rats. Method: an experimental study conducted with 48 male Wistar rats, randomized into four groups: Control, Human Amniotic Membrane, Low-Level Laser Therapy, and Low-Level Laser Therapy associated with Human Amniotic Membrane. The histopathological characteristics of the skin samples were analyzed 7 and 14 days after the burn. The data obtained were submitted to the Kolmogorov-Smirnov and Mann-Whitney tests. Results: the histological analysis of the burn injuries showed a decrease in inflammation (p<0.0001) and an increase in proliferation of fibroblasts (p<0.0001) mainly at 7 days in all treatments related to the control group. At 14 days, the greater effectiveness in accelerating the healing process was significant (p<0.0001) in the Low-Level Laser Therapy group associated with the Human Amniotic Membrane. Conclusion: the association of photobiomodulation therapies with the Human Amniotic Membrane allowed verifying a reduction in the healing process time of the experimental lesions, stimulating its proposal as a treatment protocol in partial-thickness burns.

Resumo Objetivo: avaliar o efeito da fotobiomodulação com laser de baixa intensidade 660 nm isoladamente ou associada à membrana amniótica humana no reparo de queimaduras de espessura parcial em ratos. Método: estudo experimental com 48 ratos Wistar machos, randomizados em quatro grupos: Controle, Membrana Amniótica Humana, Terapia a Laser de Baixa Intensidade e Terapia a Laser de Baixa Intensidade associado à Membrana Amniótica Humana. As características histopatológicas das amostras de pele foram analisadas aos 7 e 14 dias após a queimadura. Os dados obtidos foram submetidos aos testes de Kolmogorov-Smirnov e Mann Whitney. Resultados: a análise histológica das lesões por queimadura mostrou a diminuição da inflamação (p <0,0001) e aumento da proliferação de fibroblastos (p <0,0001), principalmente nos 7 dias em todos os tratamentos relacionados ao grupo controle. Aos 14 dias, a maior efetividade na aceleração do processo cicatricial foi significativa (p<0,0001) no grupo Terapia a Laser de Baixa Intensidade associado à Membrana Amniótica Humana. Conclusão: a associação das terapias de fotobiomodulação à membrana amniótica humana permitiu comprovar redução no tempo do processo cicatricial das lesões experimentais, estimulando sua proposição como protocolo de tratamento em queimaduras de espessura parcial.

Resumen Objetivo: evaluar el efecto de la fotobiomodulación con láser de baja intensidad 660 nm de sola o combinada con la membrana amniótica humana en la reparación de quemaduras de espesor parcial en ratas. Método: estudio experimental con 48 ratas Wistar macho, aleatorizadas en cuatro grupos: Control, Membrana Amniótica Humana, Terapia con Láser de Baja Intensidad y Terapia con Láser de Baja Intensidad combinada con la Membrana Amniótica Humana. Las características histopatológicas de las muestras de piel fueron analizadas a los 7 y 14 días después de la quemadura. Los datos obtenidos fueron sometidos a las pruebas de Kolmogorov-Smirnov y Mann-Whitney. Resultados: el análisis histológico de las lesiones por quemadura mostró una disminución de la inflamación (p <0,0001) y un aumento de la proliferación de fibroblastos (p <0,0001) principalmente a los 7 días en todos los tratamientos en comparación con el grupo control; a los 14 días, en el grupo de Terapia con Láser de Baja Intensidad combinada con la Membrana Amniótica Humana la mayor efectividad en la aceleración del proceso de cicatrización fue significativa (p<0,0001). Conclusión: la asociación de terapias de fotobiomodulación con la membrana amniótica humana permitió comprobar que hubo una reducción en el tiempo del proceso de cicatrización de lesiones experimentales, lo cual favorece que se proponga como protocolo de tratamiento en quemaduras de espesor parcial.

Effect of energy level of photobiomodulation therapy on bone repair in rats / Efecto del nivel de energía de la terapia de fotobiomodulación sobre la reparación ósea en ratas

Abstract The aim of this experimental study was to determine the effect of photobiomodulation therapy on bone repair in a rat tibia osteotomy model at 15 and 30 days. The sample consisted of 36 male Holtzman rats that were randomized into 6 equal groups. Groups A1 and A2: osteotomy + 1 J laser energy. Groups B1 and B2: osteotomy + 3 J laser energy. Groups C1 and C2 (controls): osteotomy only. The bone repair was analyzed by histological evaluation of osteoblasts and osteocytes both at 15 days (groups A1, B1, and C1) and at 30 days (groups A2, B2, and C2). Within the results, in all groups a greater number of osteoblasts was found at 15 days vs 30 days (p<0.05), and a greater number of osteocytes in B1 and C2 vs B2 and C1, respectively (p<0.05). When evaluating the 3 groups worked up to 15 days, more osteoblasts were found in A1 and C1 vs B1 (p<0.001); and osteocytes predominated in A1 and B1 vs C1 (p<0.001). At 30 days there was a greater quantity of osteoblasts in C2 vs A2 and B2 (p<0.05) and of osteocytes in C2 vs B2 (p<0.05). It is concluded that 1 J photobiomodulation therapy improved bone repair at 15 days; however, this improvement was not observed at 30 days because there were no differences between the irradiated groups and the control.

Resumen El objetivo de este estudio experimental fue determinar el efecto de terapia de fotobiomodulación sobre la reparación ósea en un modelo de osteotomía de tibia de rata a los 15 y 30 días. La muestra estuvo compuesta por 36 ratas Holtzman macho que se aleatorizaron en 6 grupos iguales. Grupos A1 y A2: osteotomía + energía láser de 1 Joule. Grupos B1 y B2: osteotomía + energía láser 3 Joule. Grupos C1 y C2 (controles): solo osteotomía. La reparación ósea fue analizada por evaluación histológica de osteoblastos y osteocitos tanto a los 15 días (grupos A1, B1 y C1) como a los 30 días (grupos A2, B2 y C2). Como resultados se encontró que en todos los grupos hubo mayor número de osteoblastos a los 15 días vs. 30 días (p<0,05), y mayor número de osteocitos en B1 y C2 vs B2 y C1, respectivamente (p<0,05). Al evaluar a los animales a los 15 días, se observó mayor número de osteoblastos en A1 y C1 vs B1 (p<0.001); y mayor número de osteocitos en A1 y B1 vs C1 (p<0,001). Al evaluar a los ratones a los 30 días hubo mayor cantidad de osteoblastos en C2 vs A2 y B2 (p<0,05) y de osteocitos en C2 vs B2 (p<0,05). Se concluye que la terapia de fotobiomodulación con 1 Joule mejoró la reparación ósea a los 15 días; sin embargo, dicha mejora no se observó a los 30 días porque no hubo diferencias entre los grupos irradiados y el control.