منابع مشابه
Farber's disease (lysosomal acid ceramidase deficiency).
The patient presented with progressive joint deformity, a hoarse voice, subsequent cachexia, and myoclonic seizures. She was first seen aged 22 months and died aged 6 years. A diagnosis of Farber's disease was made by demonstrating a deficiency of acid ceramidase both in leucocytes and fibroblasts.
متن کاملAutoproteolytic cleavage and activation of human acid ceramidase.
Herein we report the mechanism of human acid ceramidase (AC; N-acylsphingosine deacylase) cleavage and activation. A highly purified, recombinant human AC precursor underwent self-cleavage into alpha and beta subunits, similar to other members of the N-terminal nucleophile hydrolase superfamily. This reaction proceeded with first order kinetics, characteristic of self-cleavage. AC self-cleavage...
متن کاملPurification and characterization of recombinant, human acid ceramidase. Catalytic reactions and interactions with acid sphingomyelinase.
Human acid ceramidase was overexpressed in Chinese hamster ovary cells by amplification of the transfected, full-length cDNA. The majority of the overexpressed enzyme was secreted into the culture media and purified to apparent homogeneity. The purified protein contained the same 13-(alpha) and 40 (beta)-kDa subunits as human acid ceramidase from natural sources, had an acidic pH optimum (4.5),...
متن کاملAcid ceramidase confers radioresistance to glioblastoma cells
Glioblastoma multiforme (GBM) is the most common primary, intracranial malignancy of the central nervous system. The standard treatment protocol, which involves surgical resection, and concurrent radiation with adjuvant temozolomide (TMZ), still imparts a grim prognosis. Ultimately, all GBMs exhibit recurrence or progression, developing resistance to standard treatment. This study demonstrates ...
متن کاملA simple fluorogenic method for determination of acid ceramidase activity and diagnosis of Farber disease.
Acid ceramidase (aCDase) is one of several enzymes responsible for ceramide degradation within mammalian cells. As such, aCDase regulates the intracellular levels of the bioactive lipid ceramide. An inherited deficiency of aCDase activity results in Farber disease (FD), also called lipogranulomatosis, which is characterized by ceramide accumulation in the tissues of patients. Diagnosis of FD is...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Biomembranes
سال: 2006
ISSN: 0005-2736
DOI: 10.1016/j.bbamem.2006.08.019