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Polimorfismo genético del correceptor CCR5 en pacientes cubanos VIH / SIDA de la tercera edad

Authors: Hernández Requejo, Daymé; Franco Lacato, Álex Omar; Iglesias Pérez, Enrique; Calderón, Enrique J.; Armas Rodríguez, Yaxsier de;

Polimorfismo genético del correceptor CCR5 en pacientes cubanos VIH / SIDA de la tercera edad

Abstract

Introduction: Polymorphism in some chemokine genes is associated to resistance to HIV-1 infection. Homozygous Δ32 mutation of the CCR5 coreceptor is related to resistance to infection, whereas heterozygous mutation is related to a delay in the progress of the disease. Objectives: Identify the frequency of genetic polymorphism of the CCR5 coreceptor in the patients studied, as well as its relationship to CD4+ T lymphocyte levels, viral load and opportunistic diseases. Methods: A cross-sectional study was conducted of 45 Cuban elderly HIV/AIDS patients attending the Medicine Service of the University Hospital Center at IPK from January to May 2019. These patients underwent polymerase chain reaction testing (PCR) to determine genetic polymorphism of the CCR5 coreceptor. Results: A predominance was found of wild homozygotous genetic polymorphism of the CCR5 coreceptor with 87%, followed by heterozygotous Δ32 genetic polymorphism with 13%. In 80% of the patients studied the viral load was undetectable, whereas in 56% CD4+ T lymphocyte levels were above 350 cel/µl. The prevailing opportunistic disease was Pneumocystis jirovecii pneumonia in 32% of the subjects. Statistically significant differences were not found between genetic polymorphism of the CCR5 coreceptor and CD4+ T lymphocyte levels, viral load and the opportunistic diseases present in the patients studied. Conclusions: The genetic polymorphisms of the CCR5 coreceptor found in the study were of the wild homozygotous and heterozygotous Δ32 types. Gene polymorphism was limited in the patients studied.

Introducción: El 10 % de los infectados por VIH-1 son mayores de 50 años. La mutacióndel correceptor CCR5se relaciona con resistencia a la infección y con retraso en la progresión de la enfermedad. Objetivos: Identificar el polimorfismo genético del correceptor CCR5 en los pacientes VIH/sida de la tercera edad cubanos y evaluar su relación con el número de linfocitos T CD4+, la carga viral y las enfermedades oportunistas. Métodos: Se realizó un estudio de corte transversal en 45 pacientes atendidos en el Centro Hospitalario del IPK, durante los meses de enero a mayo de 2019. Para determinar el polimorfismo genético del correceptor CCR5 se realizó la reacción en cadena de la polimerasa. Resultados: El polimorfismo genético del correceptor CCR5 que predominó fue homocigótico salvaje 87%, con individuos con carga viral no detectable (80 %) y 56% niveles de linfocitos T CD4+ por encima de 350 cél/µl. La enfermedad oportunista que predominó fue la neumonía porPneumocystisjirovecii. No se observaron diferencias estadísticamente significativas, entre el polimorfismo genético del correceptor CCR5 y las variables estudiadas. Conclusiones:Primer estudio realizado en Cuba sobre el polimorfismo del correceptor CCR5 en pacientes VIH de la tercera edad que demuestra el limitado polimorfismo del gen. Estos resultados contribuyen al diseño de estrategias de tratamiento que mejoren la supervivencia estos pacientes.

Keywords

Tercera edad, Old age, opportunistic diseases, Polimorfismo genético, polimorfismo genético, Genetic polymorphisms, Enfermedades oportunistas, Virus de inmunodeficiencia humana, enfermedades oportunistas, genetic polymorphism, Viral load, sida, CCR5 coreceptor, correceptor CCR5, Opportunistic diseases, old age, Linfocitos T CD4+, Genetic polymorphism, SIDA, Virus de inmunodeficiencia humana (VIH), virus de inmunodeficiencia humana (VIH), Human immunodeficiency virus (HIV), CD4+ T lymphocytes, viral load, Carga viral, AIDS, Correceptor CCR5, human immunodeficiency virus (HIV), tercera edad, carga viral, linfocitos T CD4+

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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