RESUMO
Abstract Objective The present study aimed to evaluate the relationship between UGT1A1*28 gene polymorphism and the prevalence of neutropenia in patients with colorectal cancer treated with irinotecan. Method Thirteen studies were included. These papers were selected from the Virtual Health Library, Scientific Electronic Library Online, International Health Sciences Literature and PubMed, and their data were collected and evaluated using the BioEstat 5.3 software (BioEstat, Belém, PA, Brazil). Results Three genotypes were analyzed, namely 6/6 (wild type), 6/7, and 7/7. In total, 2,146 patients were included in the present study; of these, 55.6% (n=1,193) had 6/6 genotype, 37.3% (n=801) were heterozygous (6/7), and 7.1% (n=152) had the 7/7 genotype. A total of 1,672 (77.9%) patients displayed mild neutropenia, whereas 474 (22.1%) had severe neutropenia. When contrasting the 6/7 and 7/7 genotypes with the 6/6 genotype using statistical tests for meta-analysis, patients with the 7 allele, either Conclusion The analysis of the UGT1A1*28 gene polymorphism can aid the choice of treatment for patients with colorectal cancer in personalized medicine, increasing the chances of therapeutic success.
Resumo Objetivo Avaliar a relação do polimorfismo do gene UGT1A1*28 com a prevalência de neutropenia em pacientes com câncer colorretal submetidos a tratamento com o irinotecano. Método Foram incluídos 13 estudos sobre o tema proposto, selecionados nas bases de dados da Biblioteca Virtual de Saúde, Scientific Electronic Library Online, International Health Sciences Literature e PubMed.Os dados foramcoletados dos artigos científicos selecionados e avaliados com o auxílio do software BioEstat 5.3 (BioEstat, Belém, PA, Brasil). Resultados Osgenótipos analisados foram6/6 (tipo selvagem), 6/7 e 7/7. Foramincluídos 2.146 pacientes. Destes, 55,6% (n=1.193) apresentaram genótipo 6/6, 37,3% (n=801) eramheterozigotos (6/7) e 7,1%(n=152) tinhamo genótipo 7/7.Umtotal de 1.672 (77,9%) pacientes apresentou neutropenia leve e 474 (22,1%) neutropenia severa. Ao contrastar os genótipos 6/7 e 7/7 como 6/6, percebeu-se, coma execução dos testes estatísticos demetaanálise, que os pacientes como alelo 7, emhomozigose ou heterozigose, tinhammaior risco de desenvolver neutropenia severa que pacientes com o genótipo 6/6 (razão de chances =1,559; intervalo de confiança de 95%=1,163-2,090; p=0,003). Conclusão A análise do polimorfismo do gene UGT1A1*28 pode auxiliar na escolha do tratamento do paciente comcâncer colorretal, no contexto da medicina personalizada, ampliando, assim, as chances de sucesso terapêutico.