Article ; Online: Would, early, versus late hydroxocobalamin dose intensification treatment, prevent cognitive decline, macular degeneration and ocular disease, in 5 patients with early-onset cblC deficiency?
Molecular genetics and metabolism
2023 Volume 140, Issue 3, Page(s) 107681
Abstract: In early-onset (EO) cblC deficiency (MMACHC), hydroxocobalamin dose-intensification (OHCBL-DI) improved biochemical and clinical outcome. In mammals, Cobalamin is reduced, in a reaction mediated by MMACHC. Pathogenic variants in MMACHC disrupt the ... ...
Abstract | In early-onset (EO) cblC deficiency (MMACHC), hydroxocobalamin dose-intensification (OHCBL-DI) improved biochemical and clinical outcome. In mammals, Cobalamin is reduced, in a reaction mediated by MMACHC. Pathogenic variants in MMACHC disrupt the synthesis pathway of methyl-cobalamin (MetCbl) and 5'-deoxy-adenosyl-cobalamin (AdoCbl), cofactors for both methionine synthase (MS) and methyl-malonyl-CoA mutase (MCM) enzymes. In 5 patients (pts.), with EO cblC deficiency, biochemical and clinical responses were studied following OHCbl-DI (mean ± SD 6,5 ± 3,3 mg/kg/day), given early, before age 5 months (pts. 1, 2, 3 and 4) or lately, at age 5 years (pt. 5). In all pts., total homocysteine (tHcy), methyl-malonic acid (MMA) and Cob(III)alamin levels were measured. Follow-up was performed during 7 |
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MeSH term(s) | Child, Preschool ; Humans ; Infant ; Male ; Cognitive Dysfunction/drug therapy ; Homocystinuria/drug therapy ; Homocystinuria/genetics ; Hydroxocobalamin/therapeutic use ; Macular Degeneration/drug therapy ; Mammals ; Oxidoreductases ; Vitamin B 12/metabolism ; Vitamin B 12 Deficiency/drug therapy |
Chemical Substances | Hydroxocobalamin (Q40X8H422O) ; MMACHC protein, human (EC 1.-) ; Oxidoreductases (EC 1.-) ; Vitamin B 12 (P6YC3EG204) |
Language | English |
Publishing date | 2023-08-11 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 1418518-0 |
ISSN | 1096-7206 ; 1096-7192 |
ISSN (online) | 1096-7206 |
ISSN | 1096-7192 |
DOI | 10.1016/j.ymgme.2023.107681 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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