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Disease Markers
Volume 2018, Article ID 6105691, 11 pages
Research Article

Sickle Cell Anemia Patients in Use of Hydroxyurea: Association between Polymorphisms in Genes Encoding Metabolizing Drug Enzymes and Laboratory Parameters

1Laboratório de Hematologia, Genética e Biologia Computacional (LHGB), Fiocruz Bahia-Instituto Gonçalo Moniz (IGM), Rua Waldemar Falcão 121, Candeal, 40296-710 Salvador, BA, Brazil
2Laboratório de Pesquisa em Anemia (LPA), Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Rua Barão do Jeremoabo 147, Ondina, 40170-115 Salvador, BA, Brazil

Correspondence should be addressed to Marilda de Souza Gonçalves; rb.zurcoif.aihab@iram

Received 12 August 2017; Revised 25 November 2017; Accepted 4 December 2017; Published 28 January 2018

Academic Editor: Fabrizia Bamonti

Copyright © 2018 Sètondji Cocou Modeste Alexandre Yahouédéhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study investigated associations between SNPs in genes encoding metabolizing drug enzymes and laboratory parameters in sickle cell anemia patients under hydroxyurea (SCA-HU+). We evaluated hematologic and biochemical parameters by electronic methods and SNPs by PCR-RFLP and multiplex PCR in 35 SCA-HU+ patients and 67 SCA-HU patients. The HbS, total cholesterol, lactate dehydrogenase, aspartate aminotransferase, total bilirubin and fractions levels, and leukocyte, eosinophil, monocyte, and erythroblast counts were reduced in SCA-HU+ patients (). Moreover, they presented higher HbF, C-reactive protein, and ferritin levels and elevated MCH and MCV values (). Genotype frequencies of variants GA + AA of MPO −463G>A and c1c2 + c2c2 of CYP2E1 −1293G>C/−1053C>T were higher in SCA-HU+ patients (). Independent associations were found between the variant A allele and lower total cholesterol, between c2 allele and low alpha-1 antitrypsin and between the null GSTT1 variant and high indirect and total bilirubin in SCA-HU+ patients. In SCA-HU patients, independent associations were found between the variant A allele and high uric acid and between c2 allele and high urea. Our results suggest that SNPs MPO −463G>A, CYP2E1 −1293G>C/−1053C>T, and GSTT1 can be associated with alterations in lipid, inflammatory, renal, hemolytic, and hepatic profiles. However, further studies are needed to elucidate these associations.