Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0085632 (apathy)
 4,089 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Type I pseudohypoaldosteronism (PHA-1) is a rare salt wasting syndrome occurring soon after birth, characterized by apathy and severe dehydration accompanied by hyponatremia, hyperkalemia, and metabolic acidosis despite high plasma aldosterone concentrations. The molecular defect involved in the systemic autosomal recessive form of the syndrome has been identified. Mutations in all three genes encoding the epithelial sodium channel (ENaC) lead to a decrease in the channel function, resulting in the disease. We report here two new cases of the autosomal recessive form of PHA-1 in the same family. We found a new homozygous mutation of the gene encoding the alpha ENaC subunit (alphaR492stop). The function of the mutated ENaC channel was assessed in the Xenopus laevis oocyte expression system. The mutant ENaC activity measured with the two-electrode voltage clamp method was drastically decreased compared with the wild type activity, in agreement with the salt-losing phenotype.
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PMID:A novel mutation of the epithelial Na+ channel causes type 1 pseudohypoaldosteronism. 1237 7

Salt wasting syndrome is caused by a congenital or acquired synthesis disorder or by the aldosterone function disorder. It manifests itself by ionic disorders where the sodium and chlorine level decrease with the simultaneous potassium retention. Synthesised aldosterone is in the glomerular zone of the adrenal cortex. Symptoms of dyselectrolitemia are not distinctive, they develop within a few first days of life. The suction aversion, apathy, lack of growth or progressing, body mass loss is being noticed. The most often cause of salt wasting syndrome is the congenital cortical adrenal hyperplasia (CAH) caused by 21-hydroxylase enzyme deficit. The classic form with and without salt wasting (SW), as well as non-classic form is distinguished. The therapy of SW form depends on Hydrocortisone and Cortineff administering. The other forms of salt wasting syndrome occur not so often and these are: aldosterone synthesis deficit, dehydrogenase 3beta-hydroxysteroid deficit, lipoid cortical hyperplasia, adrenal hypoplasia congenital (AHC), adrenoleukodystrophy and pseudohypoaldosteronism. The knowledge of the symptoms and causes of salt wasting syndrome allows for the proper therapeutic management and contributes to the regular psychophysical infantile development of the children.
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PMID:[Salt wasting syndrome caused by congenital, insufficient synthesis or aldosterone function--etiology, diagnosis and management]. 1599 40

The 8-month-old patient was hospitalized after a few days of apathy and feeding difficulty with moderate exsiccation. Severe hypokalemia, hyponatremia, hypochloremia associated with alkalosis were found, which were accompanied by the decreased urinary electrolytes and elevated serum renin and aldosterone, therefore the condition corresponded to a pseudo-Bartter syndrome. The diagnosis of cystic fibrosis was arisen, which was established by the elevated sweat chloride levels. Sequencing of the 27 exons of the cystic transmembrane regulator gene two rare mutations were detected in compound heterozygous form: in the exon 10 a C1529G transversion, whereas in the exon 20 a G3978A transition was verified, both of them result in development of premature stopcodons (S466X and W1282X, respectively). Carriage of first mutation could be found in the asymptomatic mother, while the other one was identified in the father. In the proband and in the mother a G3341A mutation was also detected in exon 17, which causes an R1070Q amino acid change. However, this likely cannot associate with pathology since the existing premature stopcodon on the same allele does not allow synthesis of protein. These mutations have been described in combination with delta F508 mutation, however, their simultaneous presence in the same subject has not been reported. During the one and half year follow-up the clinical picture appeared benign.
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PMID:[Pseudo-Bartter syndrome in a case of cystic fibrosis caused by C1529G and G3978A compound heterozygosity]. 1825 63

A 4-year-old female neutered British Shorthair cat was presented as an emergency owing to progressive apathy, anorexia, adipsia, weight loss and weakness. Clinical findings showed severe weakness, collapse, weak pulse, bradycardia, hypovolaemia and hypothermia. Blood examinations revealed marked metabolic acidosis, hyponatraemia, hyperkalaemia, hyperphosphataemia, hypercalcaemia, hypochloraemia and azotaemia. The diagnosis of feline hypoadrenocorticism was based on low cortisol and aldosterone plasma levels before and after synthetic adrenocorticotropic hormone administration. Initial treatment consisted of intravenous fluid therapy. After stabilisation a combination of fludrocortisone and prednisolone was given orally. One year after diagnosis the cat is free of clinical signs and in good condition.
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PMID:Addisonian crisis and severe acidosis in a cat: a case of feline hypoadrenocorticism. 2348 53