ABSTRACT
The association of scaffolds to repair extensive bone defects can contribute to their evolution and morphophysiological recomposition. The incorporation of particulate biomaterials into three-dimensional fibrin bioproducts together with photobiomodulation therapy (PBM) has potential and can improve regenerative medicine procedures. The objective of this experiment was to evaluate the effects of PBM therapy on critical size defects filled with xenogenic bone substitute associated with fibrin biopolymer. Methods: A critical defect of 8 mm was performed in 36 Wistar male adult rats that were divided into four groups. Groups BC and BC-PBM were defined as controls with defects filled by a clot (without or with PBM, respectively) and groups XS and XS-PBM that comprised those filled with biocomplex Bio-OssTM in association with fibrin biopolymer. PBM was applied immediately after the surgery and three times a week every other day, with the parameters: wavelength of 830 nm, energy density 6.2 J/cm2, output power 30 mW, beam area of 0.116 cm2, irradiance 0.258,62 W/cm2, energy/point 0.72 J, total energy 2.88 J. Fourteen and 42 days after the surgery, animals were euthanatized and subjected to microtomography, qualitative and quantitative histological analysis. Results: The BC-PBM and XS-PBM groups had a similar evolution in the tissue repair process, with a higher density of the volume of new formed bone in relation to the groups without PBM (p = 0.04086; p = 0.07093, respectively). Intense vascular proliferation and bone deposition around the biomaterial particles were observed in the animals of the groups in which biocomplex was applied (XS and XS-PBM). Conclusion: PBM therapy allowed an improvement in the formation of new bone, with a more organized deposition of collagen fibers in the defect area. Biocomplex favored the insertion and permanence of the particulate material in bone defects, creating a favorable microenvironment for accelerate repair process.(AU)
Subject(s)
Biocompatible Materials , Biopolymers , Collagen , Low-Level Light TherapyABSTRACT
Abstract Background: The association of scaffolds to repair extensive bone defects can contribute to their evolution and morphophysiological recomposition. The incorporation of particulate biomaterials into three-dimensional fibrin bioproducts together with photobiomodulation therapy (PBM) has potential and can improve regenerative medicine procedures. The objective of this experiment was to evaluate the effects of PBM therapy on critical size defects filled with xenogenic bone substitute associated with fibrin biopolymer. Methods: A critical defect of 8 mm was performed in 36 Wistar male adult rats that were divided into four groups. Groups BC and BC-PBM were defined as controls with defects filled by a clot (without or with PBM, respectively) and groups XS and XS-PBM that comprised those filled with biocomplex Bio-OssTM in association with fibrin biopolymer. PBM was applied immediately after the surgery and three times a week every other day, with the parameters: wavelength of 830 nm, energy density 6.2 J/cm2, output power 30 mW, beam area of 0.116 cm2, irradiance 0.258,62 W/cm2, energy/point 0.72 J, total energy 2.88 J. Fourteen and 42 days after the surgery, animals were euthanatized and subjected to microtomography, qualitative and quantitative histological analysis. Results: The BC-PBM and XS-PBM groups had a similar evolution in the tissue repair process, with a higher density of the volume of new formed bone in relation to the groups without PBM (p = 0.04086; p = 0.07093, respectively). Intense vascular proliferation and bone deposition around the biomaterial particles were observed in the animals of the groups in which biocomplex was applied (XS and XS-PBM). Conclusion: PBM therapy allowed an improvement in the formation of new bone, with a more organized deposition of collagen fibers in the defect area. Biocomplex favored the insertion and permanence of the particulate material in bone defects, creating a favorable microenvironment for accelerate repair process.
ABSTRACT
Objetivos: Avaliar os efeitos do chá (infusão) de orégano sobre o perfil bioquímico e peso corporal de ratos Wistar.Métodos: Foram utilizados para o experimento 20 ratos Wistar machos divididos em dois grupos de 10 animais em cada: um grupo tratado, que durante 30 dias recebeu como única ingesta hídrica uma infusão de folhas de orégano (chá de orégano), e um grupo controle, que durante o mesmo período recebeu água pura. Todos os animais tiveram livre acesso ao mesmo tipo de ração e o líquido (água ou chá de orégano) foi ofertado ad libitum. Foram realizadas pesagens semanais, registrando os pesos corporais dos animais no 1º, 8º, 15º, 23º e 30º dias. No 30º dia do experimento os animais foram anestesiados e sacrificados com pentobarbital sódico. Foram coletadas amostras de sangue a fim de determinar colesterol total, HDL-colesterol, triglicerídeos, glicemia, proteína C reativa, creatinina, aspartato aminotransferase e alanina aminotransferase.Resultados: Os animais que receberam o chá de orégano tiveram uma glicemia menor (135,20±22,09) quando comparados ao grupo controle (152,00±16,51) (p<0,05). Não foram encontradas diferenças significativas entre os dois grupos nos níveis de colesterol total, triglicerídeos e HDL-colesterol, nem no ganho de peso médio ou no percentual de ganho de peso.Conclusões: O estudo dos efeitos do chá de orégano em ratos sugere que essa planta pode ter efeitos benéficos na manutenção da glicemia. Propõe-se que mais estudos clínicos sejam realizados com diferentes concentrações e períodos de tempo.
Aims: To evaluate the effects of oregano tea (infusion) on biochemical profile and body weight of Wistar rats.Methods: Twenty male Wistar rats were divided into two groups of 10 animals each: a treated group, which for 30 days received an infusion of oregano (oregano tea) as the only fluid intake, and a control group, which during the same period received pure water. All animals had free access to the same kind of chow and the liquid (water or oregano tea) was offered ad libitum. The rats were weighed weekly, and their body weights were recorded at 1st, 8th, 15th, 23rd, and 30th days. On day 30, the animals were anesthetized and euthanized with sodium pentobarbital. Blood samples were collected in order to determine total cholesterol, HDL-cholesterol, triglycerides, blood glucose, C-reactive protein, creatinine, aspartate aminotransferase and alanine aminotransferase.Results: The animals that received the infusion of oregano had a lower blood glucose (135.20±22.09) when compared to the control group (152.00±16.51) (p<0.05). There were no significant changes in total cholesterol, triglyceride and HDL-cholesterol or in weight gain and the rate of weight gain.Conclusions: The study of the effects of oregano tea in rats suggests that this plant might have beneficial effects on blood glucose control. It is proposed that further clinical studies are carried out with different concentrations and time periods.
Subject(s)
Animals , Rats , Models, Animal , Blood Glucose , Origanum , OriganumABSTRACT
Objetivo - O manjericão (Ocimum basilicum L.) é uma planta comumente utilizada na culinária e tem sido apontado pelas suas propriedades benéficas à saúde, possuindo importantes efeitos antioxidantes, anti-inflamatórios e hepato-protetores. O objetivo deste trabalho foi avaliar os efeitos da administração de manjericão (Ocimum basilicum L.) no perfil bioquímico de ratos. Método - Trinta ratos machos da linhagem Wistar foram utilizados. Os ratos foram divididos aleatoriamente em três grupos de 10 animais e receberam tratamentos ad libitum por um período de trinta dias. O primeiro grupo (G1) recebeu água ad libitum, o segundo e terceiro grupos (G2 e G3) receberam infusão de manjericão nas concentrações de 20g/L e 40g/L, respectivamente. Foram feitas análises de glicemia, colesterol total, HDL-c, triglicerídeos, proteína C reativa (PCR), creatinina, aspartato aminotransferase (AST) e alanina aminotransferase (ALT). Resultados - A utilização do Ocimum basilicum L. promoveu redução de 37,44% no índice de colesterol total e de 34,55% nos níveis de triglicerídeos, e aumento de 39% nos níveis de HDL-c em relação ao grupo controle. Considerando a glicemia houve redução de 11,40% e 19,36% utilizando concentrações de 20 g/L e 40 g/L do manjericão, respectivamente. Não houve alteração significativa nos níveis de creatinina, PCR e enzimas hepáticas. Conclusão - Os resultados sobre as variáveis bioquímicas são promissores, visto que as alterações podem beneficiar indivíduos em condições de hipercolesterolemia e hiperglicemia, auxiliando na prevenção e tratamento de distúrbios crônico-degenerativos. Sugere-se que novos estudos sejam realizados, como a análise de toxicidade da infusão de manjericão em ratos Wistar e determinação dos constituintes químicos da infusão.
Objective - Basil (Ocimum basilicum L.) is a plant commonly used in culinary and it has been indicated for their beneficial health properties, such as significant antioxidant, anti-inflammatory and hepato-protective effects. The aim of this study was to evaluate the effects of basil (Ocimum basilicum L.) by oral administration in the biochemical profile of rats. Method - Thirty male Wistar rats were randomly divided in three groups of 10 animals, and were fed ad libitum for 30 days. The first group (G1) received water ad libitum, the second and third groups (G2 and G3) received an infusion of basil at concentrations of 20 g/L and 40 g/L, respectively. Levels of glucose, total cholesterol, HDL-C, triglycerides, C-reactive protein (CRP), creatinine, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were analyzed. Results - The use of O. basilicum L. decreased 37.44% in cholesterol levels and 34.55% in triglyceride levels, and increased 39.00% in HDL-c levels. Whereas the blood glycemic decreased 11.40% and 19.36% using concentrations of 20g/L and 40g/L of basil, respectively. There was no significant modification in creatinine levels, CRP and liver enzymes. Conclusion - The results show that O. basilicum L. can be helpful to prevent hyperglycemia and dyslipidemias but further studies should be done, such as the toxic analysis of basil infusion in male Wistar rats and the determination of the chemical constituents of the infusion.
Subject(s)
Animals , Blood Glucose/metabolism , Lipids , Ocimum basilicum/chemistry , Plant Preparations/therapeutic use , Rats, WistarABSTRACT
Antidepressivos tricíclicos são eficazes e de custo acessível e, não obstante seus efeitos colaterais, são ainda usados no tratamento da depressão. Devido ao fato de apresentarem variações consideráveis de cinética e faixa terapêutica estreita, a monitorização terapêutica se faz necessária, para evitar efeitos sub-terapêuticos ou tóxicos. Neste trabalho foi desenvolvido um método para quantificação de imipramina e desipramina em amostras de soro utilizando a cromatografia gasosa com coluna capilar e detetor de nitrogênio e fósforo com finalidade de monitorização terapêutica. Nas condições padronizadas imipramina, desipramina e padrão interno (clomipramina) eluiram com tempos de retenção de...