Details

Autor(en) / Beteiligte

• Hatzlhofer, Betânia Lucena Domingues
• Pereira-Martins, Diego Antonio
• de Farias Domingos, Igor
• Arcanjo, Gabriela da Silva
• Weinhäuser, Isabel
• Falcão, Diego Arruda
• Farias, Isabela Cristina Cordeiro
• de Freitas Batista, Jéssica Vitória Gadelha
• Prado, Luana Priscilla Laranjeira
• Oliveira, Jéssica Maria Florencio
• Batista, Thais Helena Chaves
• Sobreira, Marcondes José de Vasconcelos Costa
• de Santana, Rodrigo Marcionilo
• Araújo, Amanda Bezerra de Sá
• de Melo, Manuela Albuquerque
• de Ancântara, Bruna Vasconcelos
• Coelho-Silva, Juan Luiz
• de Moura Rafael, Ana Beatriz Lucas
• de Lima Silva, Danízia Menezes
• Albuquerque, Flávia Peixoto
• Santos, Magnun Nueldo Nunes
• dos Anjos, Ana Cláudia
• Costa, Fernando Ferreira
• da Silva Araújo, Aderson
• Lucena-Araújo, Antonio Roberto
• Bezerra, Marcos André Cavalcanti

Titel

Alpha thalassemia, but not βS-globin haplotypes, influence sickle cell anemia clinical outcome in a large, single-center Brazilian cohort

Ist Teil von

• Annals of hematology, 2021-04, Vol.100 (4), p.921-931

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2021

Quelle

MEDLINE

Beschreibungen/Notizen

• Alpha thalassemia and beta-globin haplotype are considered classical genetic disease modifiers in sickle cell anemia (SCA) causing clinical heterogeneity. Nevertheless, their functional impact on SCA disease emergence and progression remains elusive. To better understand the role of alpha thalassemia and beta-globin haplotype in SCA, we performed a retrospective study evaluating the clinical manifestations of 614 patients. The univariate analysis showed that the presence of alpha-thalassemia −3.7-kb mutation (αα/-α and -α/-α) decreased the risk of stroke development ( p = 0.046), priapism ( p = 0.033), and cholelithiasis ( p = 0.021). Furthermore, the cumulative incidence of stroke ( p = 0.023) and cholelithiasis ( p = 0.006) was also significantly lower for patients carrying the alpha thalassemia −3.7-kb mutation. No clinical effects were associated with the beta-globin haplotype analysis, which could be explained by the relatively homogeneous haplotype composition in our cohort. Our results reinforce that alpha thalassemia can provide protective functions against hemolysis-related symptoms in SCA. Although, several genetic modifiers can impact the inflammatory state of SCA patients, the alpha thalassemia mutation remains one of the most recurrent genetic aberration and should therefore always be considered first.