Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Landmark Evaluation of Transferrin Glycoforms: Pioneering Congenital Glycosylation Disorder Diagnosis in Cuba

Version 1 : Received: 11 April 2024 / Approved: 15 April 2024 / Online: 15 April 2024 (05:14:01 CEST)

How to cite: Bermejo Valdés, A.J.; Archer Jiménez, J. Landmark Evaluation of Transferrin Glycoforms: Pioneering Congenital Glycosylation Disorder Diagnosis in Cuba. Preprints 2024, 2024040893. https://doi.org/10.20944/preprints202404.0893.v1 Bermejo Valdés, A.J.; Archer Jiménez, J. Landmark Evaluation of Transferrin Glycoforms: Pioneering Congenital Glycosylation Disorder Diagnosis in Cuba. Preprints 2024, 2024040893. https://doi.org/10.20944/preprints202404.0893.v1

Abstract

Glycosylation, the most significant modification of proteins, plays an essential role in cellular processes. Congenital disorders of glycosylation (CDG) are multisystemic diseases resulting from mutations affecting glycosylation steps. Diagnosis of CDG relies on biochemical assays, such as isoelectric focusing. Despite its significance, CDG cases remain unreported in Cuba due to the lack of implemented diagnostic methods. This study aimed to evaluate transferrin glycoforms for diagnosing congenital N-glycosylation defects. We conducted a cross-sectional descriptive study using serum samples from 17 patients stored at the National Center for Medical Genetics of Cuba for suspected CDG. Results revealed abnormal glycosylation patterns in 7 patients, suggesting congenital N-glycosylation defects. We conclude that the implementation of transferrin glycoform analysis could pioneer a preliminary diagnosis of CDG in Cuba.

Keywords

Congenital disorders of glycosylation; CDG; N-glycosylation; serum transferrin isoelectric focusing

Subject

Medicine and Pharmacology, Endocrinology and Metabolism

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