RESUMO
ETHNOPHARMACOLOGICAL RELEVANCE: Boldoa purpurascens Cav. (Nyctaginaceae) is a plant species used in traditional medicine in Cuba as antiurolithiatic. AIM OF THE STUDY: The aim of the present investigation was to evaluate the in vitro and in vivo antiurolothiatic activity of an aqueous extract from the leaves of Boldoa purpurascens. MATERIALS AND METHODS: The aqueous extract from leaves of Boldoa purpurascens was evaluated for antiurolithiatic activity in vitro and in vivo. In vitro crystallization of calcium oxalate (CaOx) was assessed using a nucleation, aggregation and growth assay. The effects of the extract and of Cystone®, used as a positive control, on the slope of nucleation and aggregation, as well as on the growth of CaOx crystals, were evaluated spectrophotometrically. The densities of the formed crystals were compared microscopically. In vivo activity was evaluated in an urolithiasis model in rats, in which kidney stones are induced by ethylene glycol (0.75%) and ammonium chloride (2%) in drinking water for 10 days. Three different experimental doses (100, 200 and 400 mg/kg, p.o.) of the extract and Cystone® were administered for 10 days. After 10 days, various biochemical parameters were measured in urine and serum, and histopathological analysis of the kidneys was carried out. RESULTS: The aqueous extract of Boldoa purpurascens inhibited the slope of nucleation and aggregation of CaOx crystallization, and decreased the crystal density. It also inhibited the growth and caused the dissolution of CaOx crystals. Cystone® exhibited similar effects. At a dose of 400 mg/kg the extract reduced the concentration of uric acid in urine, as well as the serum concentration of uric acid and creatinine. Histopathologic analysis of the kidneys of the same treatment group revealed reduced tissue damage; the results were almost similar to the untreated healthy control group. CONCLUSION: This study indicates that an aqueous leaf extract of Boldoa purpurascens may be effective in the prevention of urinary stone formation, and substantiates the traditional claim.
Assuntos
Nyctaginaceae , Extratos Vegetais/uso terapêutico , Urolitíase/tratamento farmacológico , Animais , Oxalato de Cálcio/química , Cristalização , Rim/efeitos dos fármacos , Rim/patologia , Masculino , Extratos Vegetais/química , Folhas de Planta , Ratos Wistar , Urolitíase/patologia , Urolitíase/fisiopatologiaRESUMO
Urinary tract diseases are among the main reasons for consultation in veterinary clinics and hospitals. It affects animals of any age, breed and gender. Among the diseases that affect this system, urolithiasis is the second largest cause of clinical signs compatible with feline urinary tract disease. The term urolithiasis refers to the presence of uroliths in any region of the urinary tract, but it is more commonly seen in the bladder and urethra. Uroliths are classified based on the type of mineral present in their composition, therefore, quantitative and qualitative analyzes are important for a better therapeutic approach. The animals may suffer from the disease and be asymptomatic, or show nonspecific clinical signs, making the diagnosis difficult. The disease should not be seen as a single problem, but as a consequence of various disorders. As dietary, metabolic, genetic and infectious causes, as well as factors that potentiate the chance of development of uroliths such as breed, age, sex, age range, obesity, sedentary lifestyle, geographic region and climate. Thus, the knowledge of the factors that influence the formation of uroliths, as well as the understanding of the pathophysiology, are key elements for better alternatives of therapy and prevention. The recognition of these factors helps to identify susceptible populations, minimizing exposure and increasing the protection factors, which facilitates the diagnosis and treatment of patients with urolithiasis. The objective of this paper is to present the main risk factors involved in the formation of urinary lithiasis in felines.
Assuntos
Doenças do Gato/diagnóstico , Urolitíase/veterinária , Animais , Doenças do Gato/fisiopatologia , Gatos , Fatores de Risco , Urolitíase/diagnóstico , Urolitíase/fisiopatologiaRESUMO
Background: Urolithiasis is a metabolic disease of complex and multifactorial etiology, characterized by uroliths formation in the urinary system. It becomes clinically important when obstruction occurs, with little chance of reversal of the situation, and prevention is the best option for maintaining the integrity of the reproductive capacity. For this, the aim of this research was to know the clinical and biochemical profile of urolithiasis and predict the evolution of the disease in Santa Ines sheep breed fed with calculogenic diet, as well as to evaluate the prevention potential of vitamin C. Materials, Methods & Results: In this study, 14 healthy male Santa Ines sheep, aged approximately 90 days, were divided into two groups (G1- without vitamin C and G2 - with vitamin C, 1 g/dayly/orally) fed on calculogenic diet for 120 days. The animals were examined weekly, including observation of clinical signs, and blood and urine analysis were performed. Final leukogram revealed leukocytosis by neutrophilia in G2. There was aciduria in 57.14% (G1) and 71.43% (G2) and the presence of blood cells, bacteria and sperm to the urinary sediment. There were hyperproteinemia and proteinuria, but no significant elevation in serum albumin and globulin, urea and creatinine concentrations. Urine urea remained high. Serum uric acid was higher in M15 and M16, although inferior to those obtained in urine. No hyperglycemia was reported and urine concentrations remained stable over time, with a peak observed at M16. Serum AST presented a significant increase in M12 and M13, but returned to normal just after. Urine revealed significant turbidity and density changes for G1 and G2. Haematuria was observed in G1 and G2; however, changes in color and odor were evidenced only in G2. It was verified that, although most of the animals presented aciduria, 42.86% of G1 and 28.57% of G2 presented alkaline urinary pH.[...](AU)
Assuntos
Animais , Ovinos , Urolitíase/fisiopatologia , Urolitíase/veterinária , Ácido Ascórbico/uso terapêutico , Acidificação , Leucocitose/veterináriaRESUMO
Background: Urolithiasis is a metabolic disease of complex and multifactorial etiology, characterized by uroliths formation in the urinary system. It becomes clinically important when obstruction occurs, with little chance of reversal of the situation, and prevention is the best option for maintaining the integrity of the reproductive capacity. For this, the aim of this research was to know the clinical and biochemical profile of urolithiasis and predict the evolution of the disease in Santa Ines sheep breed fed with calculogenic diet, as well as to evaluate the prevention potential of vitamin C. Materials, Methods & Results: In this study, 14 healthy male Santa Ines sheep, aged approximately 90 days, were divided into two groups (G1- without vitamin C and G2 - with vitamin C, 1 g/dayly/orally) fed on calculogenic diet for 120 days. The animals were examined weekly, including observation of clinical signs, and blood and urine analysis were performed. Final leukogram revealed leukocytosis by neutrophilia in G2. There was aciduria in 57.14% (G1) and 71.43% (G2) and the presence of blood cells, bacteria and sperm to the urinary sediment. There were hyperproteinemia and proteinuria, but no significant elevation in serum albumin and globulin, urea and creatinine concentrations. Urine urea remained high. Serum uric acid was higher in M15 and M16, although inferior to those obtained in urine. No hyperglycemia was reported and urine concentrations remained stable over time, with a peak observed at M16. Serum AST presented a significant increase in M12 and M13, but returned to normal just after. Urine revealed significant turbidity and density changes for G1 and G2. Haematuria was observed in G1 and G2; however, changes in color and odor were evidenced only in G2. It was verified that, although most of the animals presented aciduria, 42.86% of G1 and 28.57% of G2 presented alkaline urinary pH.[...]
Assuntos
Animais , Acidificação , Ovinos , Urolitíase/fisiopatologia , Urolitíase/veterinária , Ácido Ascórbico/uso terapêutico , Leucocitose/veterináriaRESUMO
Plantas medicinais têm sido utilizadas mundialmente para o controle de urolitíases na medicina humana. A ocorrência desta afecção tem aumentado em humanos, ruminantes, cães e gatos. Nos animais, fatores patofisiológicos adquiridos, congênitos ou familiares podem estar envolvidos, havendo similaridade ao que se observa em seres humanos. Porém, apesar dos avanços nas pesquisas, o emprego de plantas medicinais na medicina veterinária, ainda é pouco utilizado. Dessa forma, objetivou-se apresentar uma revisão bibliográfica dos resultados do uso de plantas medicinais no controle de urolitíase. As plantas utilizadas são: Ammi visnaga, Bergenia ligulata, Cynodon dactylon, Herniaria hirsuta e Phyllanthus niruri. A atividade antilitogênica foi relacionada às alterações da composição iônica da urina, atividade diurética, inibição de cristalização e agregação de cristais. Destaca-se o uso de Phyllanthus niruri, pela eficácia na prevenção dos urólitos. Extratos de Phyllanthus niruri normalizaram níveis altos de cálcio urinário, desfavorecendo os estágios iniciais de formação dos urólitos. Adicionalmente, foram associados à elevação da filtração glomerular e excreção urinária de ácido úrico sugerindo utilização potencial não só como efeito lítico e preventivo das calculoses, mas também em pacientes hiperuricêmicos e portadores de insuficiência renal. A partir dos resultados relatados, pode-se concluir que os trabalhos apresentados pela literatura atual são capazes de comprovar os efeitos benéficos do uso de plantas medicinais no controle de urolitíase. Entretanto, ainda são escassos os estudos realizados em animais domésticos, predominando ensaios desenvolvidos em roedores.
Medicinal plants have been used worldwide in the prevention of urolithiasis. The occurrence of this disease has increased in men, ruminants, dogs and cats. With regard to animals, acquired (congenital or hereditary) pathophysiological factors may be involved, a fact that bears similarity to what has been observed in humans. Yet, despite advances in research, the use of medicinal plants in veterinary medicine remains still underutilized. Thus, the purpose of this study is to conduct a literature review on the use of medicinal plants in the control of urolithiasis. The plants used are: Ammi visnaga, Bergenia ligulata, Cynodon dactylon, Herniaria hirsute and Phyllanthus niruri. Antilithogenic activity was related to changes in the ionic composition of urine, diuretic activity and inhibition of crystallization and aggregation of crystals. It is worth highlighting the use of Phyllanthus niruri due to its efficiency in the prevention of uroliths. Phyllanthus niruri extracts normalized high levels of urinary calcium, inhibiting the formation of uroliths in the initial stages. Additionally, they were associated with a higher glomerular filtration and higher urinary excretion of uric acid. These results suggest a potential use due to its lytic and preventive effect, as well as due to its application to hyperuricemic patients having renal insufficiency. We can conclude that the studies that pertain to the current literature can demonstrate the beneficial effects of using medicinal herbs to control urolithiasis. However, studies conducted in domestic animals remain scant, while tests developed in rodents still predominate.
Assuntos
Plantas Medicinais/efeitos adversos , Urolitíase/fisiopatologia , UrinaRESUMO
In recent decades there has been an increasing prevalence of urolitithiasis in many western countries and at the same time there has been an increasing progression of obesity that has reached epidemic proportions. The aim of the present study was to assess the influence of overweight/obesity on the metabolic risk factors for renal stone formation. We studied 799 renal stone formers (462 men and 337 women) who came to the clinic for metabolic risk factors evaluation. They were all studied with a standard protocol (two 24-h urine collections and serum parameters). They were divided according to their BMI in normal (BMI < 25) overweight (BMI 25-29.9) and obese (BMI > 30). Low-weight individuals were excluded. Overall, 487 of 799 (60.9%) patients had a BMI > 25, including 40.6% overweight and 20.3% obese. Among women 55.2% had normal weight, 25.5 were overweight, and 19.3% were Obese; among men 27.3% had normal weight, 51.7 were overweight, and 21% were obese. Age increased significantly with increasing BMI both in men and women. In women there was a significant increase in the excretion of oxalate, uric acid, phosphorus, creatinine, and sodium with increasing BMI, but no change was observed in calcium, magnesium, citrate, and urine pH. In men there was a significant increase in the excretion of oxalate, uric acid, creatinine, phosphorus, sodium, magnesium, and citrate with increasing BMI, no change in urinary calcium and significant progressive decrease in urinary pH. In this population of stone formers there was a high prevalence of overweight/obesity (60.9%). Both in men and women we found a significant increase in the urinary excretion of two promoters of stone formation, oxalate, and uric acid but no change in urinary calcium. There was either no change or increase in magnesium and citrate, inhibitors of crystallization, and a significant decrease in urine pH only in men.