RESUMO
MS-target analyses are frequently utilized to analyze and validate structural changes of biomolecules across diverse fields of study such as proteomics, glycoproteomics, glycomics, lipidomics, and metabolomics. Targeted studies are commonly conducted using multiple reaction monitoring (MRM) and parallel reaction monitoring (PRM) techniques. A reliable glycoproteomics analysis in intricate biological matrices is possible with these techniques, which streamline the analytical workflow, lower background interference, and enhance selectivity and specificity.
Assuntos
Metabolômica , Proteômica , Espectrometria de Massas/métodos , Proteômica/métodos , Lipidômica , Glicômica/métodosRESUMO
Las manifestaciones clínicas de la fibrosis quística comprometen diferentes órganos; siendo los sistemas respiratorio y gastrointestinal los más frecuentemente afectados. Puede presentarse como un desequilibrio ácido-base y electrolítico conocido como síndrome de pseudo-Bartter que se deï¬ne como un episodio de deshidratación con alcalosis metabólica hipoclorémica hiponatrémica e hipocalémica en ausencia de alteración tubular renal. Se presenta el caso clínico de un lactante menor masculino de cuatro meses con dos hospitalizaciones previas por deshidratación moderada y desequilibrio hidroelectrolítico con hiponatremia. La tercera hospitalización fue el 27 de enero de 2017 por 20 días. En esta ocasión fue admitido por gastroenteritis aguda, con deshidratación moderada, desequilibrio hidroelectrolítico, y observación por un trastorno metabólico. Por presentar deshidratación con alcalosis metabólica hipoclorémica hiponatrémica e hipocalémica sin tubulopatía renal se diagnosticó síndrome de pseudo Bartter y se sospechó fibrosis quística que se corroboró con medición de electrolitos en sudor y análisis molecular de las mutaciones . Conclusión: Debe considerarse el diagnóstico de fibrosis quística en un niño, sobre todo menor de dos años, con deshidratación, alcalosis metabólica hiponatrémica hipoclorémica aunque no haya presentado síntomas respiratorios o gastrointestinales típicos de la enfermedad. El diagnóstico temprano es fundamental para mejorar el pronóstico y la sobrevida a largo plazo
The clinical manifestations of cystic fibrosis may involve multiple organs. Although the respiratory and gastrointestinal are the most commonly affected systems, it can present as an acid- base and electrolyte imbalance called pseudo -Bartter syndrome which is defined as an episode of dehidration with metbolic alkalosis with hypochloremia, hyponatremia and hypokalemia in the absence of renal tubular pathology. We report a case of a 4-month-old male infant with 2 previous episodes of moderate dehydration and hydroelectrolyte imbalance with hyponatremia. He was admitted on January 27 th 2017 for 20-days hospital stay. On his 3th hospitalization, he was admitted with acute gastroenteritis, moderate dehydration, hydroelectrolyte imbalance, and probable metabolic disorder. Due to the presence of metabolic hypochloremic alkalosis with hyponatremia and hypokalemia without renal tubulopathy, Pseudo Bartter Syndrome was diagnosed and cystic fibrosis was suspected and corroborated later with the measurement of sweat electrolytes and molecular analysis of mutations. Conclusion: The diagnosis of cystic fibrosis must be suspected in a child, especially those under 2 years old, with hyponatremic hypochloremic,hypokalemic metabolic alkalosis dehydration should be considered even in the absence of respiratory or gastrointestinal symptoms, which are typically present in this disease. An early diagnosis is essential to improve the prognosis and long term survivor