An overview of combined D-2- and L-2-hydroxyglutaric aciduria: functional analysis of CIC variants

Pop, Ana; Williams, Monique; Struys, Eduard A.; Monné, Magnus; Jansen, Erwin E. W.; De Grassi, Anna; Kanhai, Warsha A.; Scarcia, Pasquale; Ojeda, Matilde R. Fernandez; Porcelli, Vito; van Dooren, Silvy J. M.; Lennertz, Pascal; Nota, Benjamin; Abdenur, Jose E.; Coman, David; Das, Anibh Martin; El-Gharbawy, Areeg; Nuoffer, Jean-Marc; Polic, Branka; Santer, René; ... (2018). An overview of combined D-2- and L-2-hydroxyglutaric aciduria: functional analysis of CIC variants. Journal of inherited metabolic disease, 41(2), pp. 169-180. Springer 10.1007/s10545-017-0106-7

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Combined D-2- and L-2-hydroxyglutaric aciduria (D/L-2-HGA) is a devastating neurometabolic disorder, usually lethal in the first years of life. Autosomal recessive mutations in the SLC25A1 gene, which encodes the mitochondrial citrate carrier (CIC), were previously detected in patients affected with combined D/L-2-HGA. We showed that transfection of deficient fibroblasts with wild-type SLC25A1 restored citrate efflux and decreased intracellular 2-hydroxyglutarate levels, confirming that deficient CIC is the cause of D/L-2-HGA. We developed and implemented a functional assay and applied it to all 17 missense variants detected in a total of 26 CIC-deficient patients, including eight novel cases, showing reduced activities of varying degrees. In addition, we analyzed the importance of residues affected by these missense variants using our existing scoring system. This allowed not only a clinical and biochemical overview of the D/L-2-HGA patients but also phenotype-genotype correlation studies.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Institute of Clinical Chemistry
04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine

UniBE Contributor:

Nuoffer, Jean-Marc

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0141-8955

Publisher:

Springer

Language:

English

Submitter:

Jean-Marc Nuoffer

Date Deposited:

18 Apr 2018 09:36

Last Modified:

26 Oct 2019 15:56

Publisher DOI:

10.1007/s10545-017-0106-7

PubMed ID:

29238895

BORIS DOI:

10.7892/boris.110092

URI:

https://boris.unibe.ch/id/eprint/110092

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