ABSTRACT
Urolithiasis is a common urological disorder responsible for serious human affliction and cost to the society with a high recurrence rate. The aim of the present study was to systematically evaluate the phlorotannin rich extract of
To explore the effect of
The yield of
The findings of the present study suggest that
Subject(s)
Animals , Male , Calcium Oxalate/antagonists & inhibitors , Plant Extracts/pharmacology , Sargassum/chemistry , Tannins/pharmacology , Urolithiasis/prevention & control , Calcium Oxalate/chemistry , Calcium/analysis , Crystallization , Kidney/drug effects , Magnesium/analysis , Models, Animal , Oxalates/analysis , Phosphorus/analysis , Random Allocation , Rats, Sprague-Dawley , Reference Values , Reproducibility of Results , Time Factors , Treatment OutcomeABSTRACT
Urolithiasis and calcium oxalate crystal deposition diseases are still significant medical problems. In the course of nephrocalcin cDNA cloning, we have identified FKBP-12 as an inhibitory molecule of calcium oxalate crystal growth. lambdagt 11 cDNA libraries were constructed from renal carcinoma tissues and screened for nephrocalcin cDNA clones using anti-nephrocalcin antibody as a probe. Clones expressing recombinant proteins, which appeared to be antigenically cross-reactive to nephrocalcin, were isolated and their DNA sequences and inhibitory activities on the calcium oxalate crystal growth were determined. One of the clone lambdagt 11 #31-1 had a partial fragment (80 bp) of FKBP-12 cDNA as an insert. Therefore, a full-length FKBP-12 cDNA was PCR-cloned from the lambdagt 11 renal carcinoma cDNA library and was subcloned into an expression vector. The resultant recombinant FKBP-12 exhibited an inhibitory activity on the calcium oxalate crystal growth (Kd=10(-7) M). Physiological effect of the extracellular FKBP-12 was investigated in terms of macrophage activation and proinflammatory cytokine gene induction. Extracellular FKBP-12 failed to activate macrophages even at high concentrations. FKBP-12 seems an anti-stone molecule for the oxalate crystal deposition disease and recurrent stone diseases.
Subject(s)
Animals , Humans , Male , Mice , Base Sequence , Calcium Oxalate/antagonists & inhibitors , Carcinoma, Renal Cell , Crystallization , DNA, Complementary , Extracellular Space , Glycoproteins/genetics , Kidney Calculi/prevention & control , Kidney Neoplasms , Mice, Inbred ICR , Molecular Sequence Data , Recombinant Fusion Proteins/genetics , Tacrolimus Binding Protein 1A/geneticsABSTRACT
A nefrolitíase é uma desordem que afeta 1 a 5 por cento da populaçao causando significante morbidade. Os autores propoem um protocolo de investigaçao para cálculo renal definido e estabelecem uma rotina de investigaçao, organizada em etapas, que visa a excluir, ou definir, as patologias associadas ao cálculo. Para uma melhor compreensao deste protocolo, os autores realizaram uma revisao bibliográfica sobre a etiopatogenia e diagnóstico da litíase renal.
Subject(s)
Humans , Male , Female , Kidney Calculi/diagnosis , Calcium Metabolism Disorders/diagnosis , Calcium Oxalate/antagonists & inhibitors , Calcium/metabolism , Calcium/urine , Kidney Calculi/etiology , Hypercalcemia/diagnosis , Urinary Tract Infections/diagnosisABSTRACT
Existem substâncias naturais na urina com propriedades inibitórias sobre a formaçäo de cálculos urinários. Uma das mais estudadas é o citrato, um ácido orgânico natural capaz de inibir "in vitro" o crescimento de cristais de fosfato e oxalato de cálcio. Estudos em portadores de cálculos urinários de cálcio mostraram a ocorrência de níveis baixos de citrato urinário e a possibilidade de tratamento com citrato de potássio via oral. Os autores revisaram o papel do citrato na inibiçäo da formaçäo de cálculos urinários de cálcio, juntamente com uma descriçäo do seu metabolismo, métodos de detecçäo, ocorrência de hipocitratúria e sua correçäo