Structural hemoglobinopathies: Analysis of 128 cases and their relevance in the diabetic control.

Med Clin (Barc)

Clinical Biochemistry Department, Clinical University Hospital of Salamanca, Salamanca, Spain. Electronic address:

Published: February 2022

Background And Objectives: Hemoglobinopathies are monogenic disorders with autosomal recessive inheritance. In Europe, with increased migration flows these conditions are appearing more frequently in non-endemic regions. HbA testing is useful for evaluating long-term glycaemic status in diabetes mellitus patients. During HbA evaluation, other hemoglobin fractions are detected, such as structural hemoglobinopathies. The principal objective of this work is to study the incidence of structural hemoglobinopathies in our area and their management.

Material And Methods: Total population of 65,000 patients for glycaemic monitoring was evaluated with HPLC equipment (HPLC-ARKRAY® ADAMS, Menarini Diagnostics, Italy). This equipment quantifies different hemoglobin fractions.

Results: We identified a total of 128 variants, representing an incidence with respect to the study population of 0.19% (1.97‰). Most (69) were identified in the foreign population, and the most frequent variant identified was heterozygous S hemoglobinopathy. In six families, structural hemoglobinopathy was identified. Three patients with HbS/HbS were detected. Primary Health Centers were the origin of an important part of these variants (82).

Conclusions: Our study describes a low incidence for structural variants compared with the estimated incidence in Spain. These variants can interfere with HbA testing. In these cases, glycated protein study is an appropriate alternative to monitor diabetic therapy.

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http://dx.doi.org/10.1016/j.medcli.2020.11.037DOI Listing

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