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Congenital adrenal hyperplasia in paediatric age: molecular analysis of the CYP...

Gomes, Susana; Silva, Júlia; Pereira-Caetano, Iris; Lopes, Lurdes; Limbert, Catarina; Amaral, Daniela; Pina, Rosa; Kay, Teresa; Sampaio, Lurdes

Introduction: Congenital adrenal hyperplasia(CAH) is due to 21-hidroxilase deficiency(21-OHD) in about 95% of the cases. 21-OH is encoded by CYP21A2 gene, and most frequent mutations occurring in CYP21A2 are due to gene conversions originated from its pseudogene(CYP21A1P). The clinical severity of CAH is associated with the impairment of 21-OH activity, which is directly related with the molecular defect. CAH i...


Espectro de alterações moleculares detetadas no gene CYP21A2 associadas a defic...

Gomes, Susana; Pereira-Caetano, Iris; Lopes, Maria Lurdes; Limbert, Catarina; Amaral, Daniela; Pina, Rosa; Antunes, Diana; Carvalho, Inês; Kay, Teresa

A maioria dos doentes com hiperplasia suprarrenal congénita (HSC) apresenta alterações moleculares no gene CYP21A2, o qual codifica a enzima 21-hidroxilase (21-OH). Os doentes com a forma clássica de deficiência em 21-OH (21-OHD) apresentam a síntese de cortisol diminuída no córtex adrenal e, os casos mais graves, também apresentam deficiência de aldosterona. As mulheres com 21-OHD grave apresentam excesso de a...


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