Ictiosis ligada al cromosoma X: comunicación de tres casos y revisión de la literatura / X-linked ictiosis: report of 3 cases and review of the literature

La ictiosis ligada al cromosoma X es una genodermatosis poco frecuente que afecta a varones a partir de las 2 semanas de vida y se caracteriza por xerodermia, hiperqueratosis, descamación y, en algunos casos, manifestaciones extracutáneas como criptorquidia y opacidad de la córnea. La enfermedad es de evolución crónica y experimenta mejoría parcial en época estival. La deleción total o parcial de la enzima sulfatasa esteroidea es la causa de las manifestaciones clínicas. Presentamos tres pacientes con ictiosis ligada al cromosoma X, a quienes se les realizaron interconsultas con los servicio de Oftalmología y Pediatría. Se encuentran actualmente en tratamiento con emolientes...

STS gene in a pedigree with X-linked ichthyosis / 华中科技大学学报（医学）（英德文版）

To investigate the gene mutation in a pedigree with X-linked ichthyosis (XLI) and to explore the relationship between the mutation and its clinical manifestations, genomic DNA of affected members, the normal member of the pedigree and 50 unrelated normal members was extracted with a whole blood genomic DNA extraction kit and the DNA was used as a template for the polymerase chain reaction (PCR)-mediated amplification of exon 1 and exon 10 of the STS gene. hHb6 (human hair basic keratin) gene was used as the internal control. Our results showed that the STS gene was deleted in affected members in the pedigree with X-linked ichthyosis. The normal member of the pedigree and 50 unrelated normal members had no such deletion. The proband and his mother had products in the internal control after PCR amplification. The blank control had no product. It is concluded that deletion of the STS gene existed in this pedigree with X-linked ichthyosis, and it is responsible for the unique skin lesions of X-linked ichthyosis.

Arilsulfatase C e o diagnóstico de ictiose recessiva ligada ao X / Arylsulphatase C and the diagnosis of recessive X-linked ichthyosis

Nas ictioses recessivas ligadas ao x (IRLX) ocorre deficiência ou ausência de atividade da enzima colesterol-sulfatase (arilsulfatase C). A descamaçäo da camada córnea é retardada, determinando quadro clínico característico. Com base em um caso clínico de IRLX, säo discutidos os aspectos clínicos, bioquímicos e genéticos dessa forma de ictiose