Frequency of hemoglobinopathies among pregnant women from the sickle cell anemia program in Cuba

Authors

Keywords:

electrophoresis, hemoglobins, pregnant women, hemoglobinopathies, prenatal detection, hemoglobinopathy S, hemoglobinopathy C.

Abstract

Introduction: Hemoglobinopathies are hereditary monogenic errors characterized by defects in the hemoglobin molecule. In Cuba, prenatal detection of hemoglobinopathies is performed by hemoglobin electrophoresis to identify high-risk couples. The program offers genetic counseling, prenatal molecular diagnosis and selective pregnancy termination in case of affected fetuses at the request of couples.

Objective: Determine the frequency of hemoglobinopathies among pregnant women living in Cuba.

Methods: A descriptive cross-sectional retrospective study was conducted to determine the frequency of hemoglobinopathies in 1 342 917 pregnant women recruited in the period 2009-2019. Screening was based on the diagnostic method of hemoglobin electrophoresis in alkaline pH agarose gels. Confirmation was performed with hemoglobin electrophoresis in acid pH agarose gel. Both methods used HYDRASYS technology.

Results: Overall frequency of pregnant women with hemoglobinopathies was 3.5%. Hemoglobinopathies were detected in 47 465 women: 38 698 with variant S heterozygote, 8 706 with variants of hemoglobin C y 158 with other variants. 44 283 husbands with hemoglobinopathies and 3 099 high-risk couples were detected, and 2 689 prenatal molecular diagnostic tests were conducted. A total 522 affected fetuses were confirmed, and 382 couples requested pregnancy termination. The subprogram achieved 99.24% coverage in the country.

Conclusion: The high frequency of hemoglobinopathies in Cuba justifies the importance of continuing the carrier detection subprogram to prevent the emergence of severe forms of the disease.


Author Biography

Yadira Valdés Fraser, Centro Nacional de Genética Médica

Investigador Agregado. Laboratorio de Genética Bioquímica.

Published

2021-04-06

How to Cite

1.
Valdés Fraser Y, Pérez Rodríguez J, Concepción Álvarez A, Acosta Sánchez T, Suárez Besil B, Llacer Riviera D, et al. Frequency of hemoglobinopathies among pregnant women from the sickle cell anemia program in Cuba. Rev Cubana Hematol Inmunol Hemoter [Internet]. 2021 Apr. 6 [cited 2025 Jan. 31];37(1). Available from: https://revhematologia.sld.cu/index.php/hih/article/view/1338

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