| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 1.25 MB | Adobe PDF |
Autores
Resumo(s)
A avaliação da função renal é idealmente feita através da medição da taxa de filtração glomerular (TFG), embora na prática clínica a sua execução seja dispendiosa e bastante morosa dificultando a sua aplicação. Como alternativa a maior parte dos clínicos opta pelo uso da creatinina e da ureia como biomarcadores da função renal. Mas nenhum destes contém a especificidade e sensibilidade necessárias para deteção precoce de alterações na função renal.
A frequência de doenças como a doença renal crónica (DRC), especialmente na população felina, tem impulsionado a investigação na área dos biomarcadores de função renal. Existem vários em estudo, embora a maioria apresente debilidades que os impede de vir a substituir a creatinina e a ureia.
A dimetilarginina simétrica (“symmetrical dimethylarginine”, SDMA) é no entanto o biomarcador de função renal atual que suscita maior interesse e poderá ser bastante útil na deteção precoce de DRC. Apresenta maior sensibilidade e especificidade comparativamente à creatinina e não sofre influência de fatores extra-renais como a condição corporal ou o teor proteico da dieta.
O estudo desenvolvido teve como objetivo avaliar as vantagens do uso da SDMA enquanto biomarcador de função renal, para o diagnóstico precoce de DRC em gatos. Foi comparado o estadiamento feito a partir do doseamento da creatinina plasmática com o obtido após dosear a SDMA, procurando benefícios da sua utilização. A amostra foi constituída por 16 animais, dos quais 5 apresentaram concentrações de SDMA acima do intervalo de referência. Os resultados obtidos permitiram detetar alteração da função renal em 2 animais, nos quais a creatinina plasmática não surgiu acima do intervalo de referência, e alterar o estadiamento de 1 animal.
ABSTRACT - Renal function biomarkers - the example of symmetrical dimethylarginine - The evaluation of renal function is ideally made by measuring the glomerular filtration rate (GFR), although in clinical practice its execution is expensive and time consuming, making it difficult to apply. Alternatively, most clinicians choose creatinine and urea as biomarkers of renal function. But none of these contains the specificity and sensitivity necessary for early detection of changes in renal function. The frequency of diseases such as chronic kidney disease (CKD), especially in the feline population, has boosted research in the area of renal function biomarkers. There are several under study, although the majority presents debilitys that prevent them from replacing creatinine and urea. The symmetrical dimethylarginine (SDMA) is, however, the current biomarker of renal function that raises greater interest and can be quite useful in the early detection of CKD. Offers greater sensitivity and specificity compared to creatinine and don’t experience influence of extra-renal factors such as body condition or the protein contente of the diet. The aim of the study was to evaluate the advantages of using SDMA as a biomarker of renal function for the early diagnosis of CKD in cats. The staging done from the plasma creatinine assay was compared with that obtained after dosing the SDMA, looking for benefits of its use. The sample consisted of 16 animals, of which 5 had SDMA concentrations above the reference range. The results obtained made it possible to detect changes in renal function of 2 animals, in which the plasma creatinine did not emerged above the reference range, and to change the staging of 1 animal.
ABSTRACT - Renal function biomarkers - the example of symmetrical dimethylarginine - The evaluation of renal function is ideally made by measuring the glomerular filtration rate (GFR), although in clinical practice its execution is expensive and time consuming, making it difficult to apply. Alternatively, most clinicians choose creatinine and urea as biomarkers of renal function. But none of these contains the specificity and sensitivity necessary for early detection of changes in renal function. The frequency of diseases such as chronic kidney disease (CKD), especially in the feline population, has boosted research in the area of renal function biomarkers. There are several under study, although the majority presents debilitys that prevent them from replacing creatinine and urea. The symmetrical dimethylarginine (SDMA) is, however, the current biomarker of renal function that raises greater interest and can be quite useful in the early detection of CKD. Offers greater sensitivity and specificity compared to creatinine and don’t experience influence of extra-renal factors such as body condition or the protein contente of the diet. The aim of the study was to evaluate the advantages of using SDMA as a biomarker of renal function for the early diagnosis of CKD in cats. The staging done from the plasma creatinine assay was compared with that obtained after dosing the SDMA, looking for benefits of its use. The sample consisted of 16 animals, of which 5 had SDMA concentrations above the reference range. The results obtained made it possible to detect changes in renal function of 2 animals, in which the plasma creatinine did not emerged above the reference range, and to change the staging of 1 animal.
Descrição
Dissertação de Mestrado Integrado em Medicina Veterinária
Palavras-chave
Biomarcadores de função renal Dimetilarginina simétrica Gatos Renal function biomarkers Symmetrical Dimethylarginine Cats
Contexto Educativo
Citação
Guerreiro, L.I.C. (2018). Biomarcadores de função renal : o exemplo da dimetilarginina simétrica. Dissertação de mesttrado. Universidade de Lisboa, Faculdade de Medicina Veterinária, Lisboa.
Editora
Universidade de Lisboa, Faculdade de Medicina Veterinária
