RESUMO
Beans reached the research spotlight as a source of bioactive compounds capable of modulating different functions. Recently, we reported antioxidant and oxidonitrergic effect of a low molecular weight peptide fraction (<3 kDa) from hardened bean (Phaseolus vulgaris) in vitro and ex vivo, which necessitate further in vivo assessments. This work aimed to evaluate the hypotensive effect and the involved physiological mechanisms of the hardened common bean peptide (Phaseolus vulgaris) in normotensive (Wistar) and hypertensive (SHR) animals. Bean flour was combined with a solution containing acetonitrile, water and formic acid (25: 24: 1). Protein extract (PV3) was fractioned (3 kDa membrane). We assessed PV3 effects on renal function and hemodynamics of wistar (WT-normotensive) and spontaneously hypertensive rats (SHR) and measured systemic arterial pressure and flow in aortic and renal beds. The potential endothelial and oxidonitrergic involvements were tested in isolated renal artery rings. As results, we found that PV3: I) decreased food consumption in SHR, increased water intake and urinary volume in WT, increased glomerular filtration rate in WT and SHR, caused natriuresis in SHR; II) caused NO- and endothelium-dependent vasorelaxation in renal artery rings; III) reduced arterial pressure and resistance in aortic and renal vascular beds; IV) caused antihypertensive effects in a dose-dependent manner. Current findings support PV3 as a source of bioactive peptides and raise the potential of composing nutraceutical formulations to treat renal and cardiovascular diseases.
RESUMO
To evaluate the use of tenecteplase in transoperative phacoemulsification in healthy rabbits, the study was carried out with fifteen New Zealand rabbits, divided into three groups: control group (CG), untreated group (UG) and treated group (TG). UG and TG were operated by phacoemulsification and TG received 50 µg / 0.3 mL of intracameral tenecteplase. The postoperative evaluations were 24 h, 72 h, 7 days, 15 days and 21 days. In TP21 the animals were submitted to euthanasia and aqueous humor samples were collected. No significant differences were observed in the clinical evaluations between CG and TG in relation to incidence rates of intraocular pressure (IOP), corneal edema, fibrin deposits, hyphema, aqueous flare and synechia. In the physicochemical evaluation of the aqueous humor, there were no significant differences between the three groups in relation to pH values and concentrations of chloride ions. The aqueous humor density values were statistically different between CG and the other groups. In the histological evaluation, there were no significant differences between the groups. The use of tenecteplase in transoperative phacoemulsification in rabbits did not present significant differences in terms of clinical, physicochemical and histological parameters.(AU)
Para avaliar o uso da tenecteplase na facoemulsificação transoperatória em coelhos sadios, o estudo foi realizado com quinze coelhos da raça Nova Zelândia, divididos em três grupos: grupo controle (CG) grupo não tratado (UG) e grupo tratado (TG). UG e TG foram operados por facoemulsificação e TG recebeu 50 µg / 0,3 mL de tenecteplase intracameral. As avaliações pós-operatórias foram 24 h, 72 h, 7 dias, 15 dias e 21 dias. No TP21 os animais foram submetidos à eutanásia e amostras de humor aquoso foram coletadas. Não foram observadas diferenças significativas nas avaliações clínicas entre o CG e o TG em relação às taxas de incidência de pressão intraocular (PIO), edema de córnea, depósitos de fibrina, hifema, flare aquoso e sinéquia. Na avaliação físico-química do humor aquoso, não houve diferenças significativas entre os três grupos em relação aos valores de pH e concentrações de íons cloreto. Os valores de densidade de humor aquoso foram estatisticamente diferentes entre CG e os outros grupos. Na avaliação histológica, não houve diferenças significativas entre os grupos. O uso da tenecteplase na facoemulsificação transoperatória em coelho não apresentou diferenças significativas em termos de parâmetros clínicos, físico-químicos e histológicos.(AU)
Assuntos
Animais , Coelhos , Tenecteplase/análise , Facoemulsificação/métodos , Facoemulsificação/veterinária , Humor Aquoso , Fibrina/análise , Extração de Catarata/métodos , Extração de Catarata/veterináriaRESUMO
To evaluate the use of tenecteplase in transoperative phacoemulsification in healthy rabbits, the study was carried out with fifteen New Zealand rabbits, divided into three groups: control group (CG), untreated group (UG) and treated group (TG). UG and TG were operated by phacoemulsification and TG received 50 µg / 0.3 mL of intracameral tenecteplase. The postoperative evaluations were 24 h, 72 h, 7 days, 15 days and 21 days. In TP21 the animals were submitted to euthanasia and aqueous humor samples were collected. No significant differences were observed in the clinical evaluations between CG and TG in relation to incidence rates of intraocular pressure (IOP), corneal edema, fibrin deposits, hyphema, aqueous flare and synechia. In the physicochemical evaluation of the aqueous humor, there were no significant differences between the three groups in relation to pH values and concentrations of chloride ions. The aqueous humor density values were statistically different between CG and the other groups. In the histological evaluation, there were no significant differences between the groups. The use of tenecteplase in transoperative phacoemulsification in rabbits did not present significant differences in terms of clinical, physicochemical and histological parameters.
Para avaliar o uso da tenecteplase na facoemulsificação transoperatória em coelhos sadios, o estudo foi realizado com quinze coelhos da raça Nova Zelândia, divididos em três grupos: grupo controle (CG) grupo não tratado (UG) e grupo tratado (TG). UG e TG foram operados por facoemulsificação e TG recebeu 50 µg / 0,3 mL de tenecteplase intracameral. As avaliações pós-operatórias foram 24 h, 72 h, 7 dias, 15 dias e 21 dias. No TP21 os animais foram submetidos à eutanásia e amostras de humor aquoso foram coletadas. Não foram observadas diferenças significativas nas avaliações clínicas entre o CG e o TG em relação às taxas de incidência de pressão intraocular (PIO), edema de córnea, depósitos de fibrina, hifema, flare aquoso e sinéquia. Na avaliação físico-química do humor aquoso, não houve diferenças significativas entre os três grupos em relação aos valores de pH e concentrações de íons cloreto. Os valores de densidade de humor aquoso foram estatisticamente diferentes entre CG e os outros grupos. Na avaliação histológica, não houve diferenças significativas entre os grupos. O uso da tenecteplase na facoemulsificação transoperatória em coelho não apresentou diferenças significativas em termos de parâmetros clínicos, físico-químicos e histológicos.