L.S. Ondei, P.J.A. Zamaro, P.H. Mangonaro, C.R. Valêncio and C.R. Bonini-Domingos
Published June 30, 2007
Genet. Mol. Res. 6 (2): 453-460 (2007)

About the Authors
L.S. Ondei, P.J.A. Zamaro, P.H. Mangonaro, C.R. Valêncio and C.R. Bonini-Domingos

Corresponding author
L.S. Ondei
E-mail: luondei@yahoo.com.br

ABSTRACT

The purpose of the present study was to establish reference values for hemoglobins (Hb) using HPLC, in samples containing normal Hb (AA), sickle cell trait without alpha-thalassemia (AS), sickle cell trait with alpha-thalassemia (ASH), sickle cell anemia (SS), and Hb SC disease (SC). The blood samples were analyzed by electrophoresis, HPLC and molecular procedures. The Hb A2 mean was 4.30 ± 0.44% in AS, 4.18 ± 0.42% in ASH, 3.90 ± 1.14% in SS, and 4.39 ± 0.35% in SC. They were similar, but above the normal range. Between the AS and ASH groups, only the amount of Hb S was higher in the AS group. The Hb S mean in the AS group was 38.54 ± 3.01% and in the ASH it was 36.54 ± 3.76%. In the qualitative analysis, using FastMap, distinct groups were seen: AA and SS located at opposite extremes, AS and ASH with overlapping values and intermediate distribution, SC between heterozygotes and the SS group. Hb S was confirmed by allele-specific polymerase chain reaction. The Hb values established will be available for use as a reference for the Brazilian population, drawing attention to the increased levels of Hb A2, which should be considered with caution to prevent incorrect diagnoses.

Key words: Reference values, High-performance liquid chromatography, Hemoglobins