Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.18/4785 |
Resumo: | Sickle cell anemia (SCA) is characterized by chronic hemolysis, severe vasoocclusive crises (VOCs), and recurrent often severe infections. A cohort of 95 SCA pediatric patients was the background for genotype-to-phenotype association of the patient's infectious disease phenotype and three non-coding polymorphic regions of the TLR2 gene, the -196 to -174 indel, SNP rs4696480, and a (GT)n short tandem repeat. The infectious subphenotypes included (A) recurrent respiratory infections and (B) severe bacterial infection at least once during the patient's follow-up. The absence of the haplotype [Del]-T-[n ≥ 17] (Hap7) in homozygocity protected against subphenotype (B), in a statistically significant association, resisting correction for multiple testing. For the individual loci, the same association tendencies were observed as in the haplotype, including a deleterious association between the SNP rs4696480 T allele and subphenotype (A), whereas the A/A genotype was protective, and a deleterious effect of the A/T genotype with subphenotype (B), as well as including the protective effect of -196 to -174 insert (Ins) and deleterious effect of the deletion (Del) in homozygocity, against subphenotype (B). Moreover, a reduction in the incidence rate of severe bacterial infection was associated to a rise in the hemolytic score, fetal hemoglobin levels (prior to hydroxyurea treatment), and 3.7-kb alpha-thalassemia. Interestingly, differences between the effects of the two latter covariables favoring a reduction in the incidence rate of subphenotype (B) contrast with a resulting increase in relation to subphenotype (A). These results could have practical implications in health care strategies to lower the morbidity and mortality of SCA patients |
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Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemiaAgentes Microbianos e AmbienteDeterminantes Imunológicos em Doenças CrónicasDeterminantes da Saúde e da DoençaDoenças GenéticasEpidemiologia ClínicaInfecções RespiratóriasPatologias do Glóbulo VermelhoSickle CellanemiaTLR2Genetic VariantsViral and Bacterial InfectionHemolytic ComponentGenotype-to-phenotype AssociationSickle cell anemia (SCA) is characterized by chronic hemolysis, severe vasoocclusive crises (VOCs), and recurrent often severe infections. A cohort of 95 SCA pediatric patients was the background for genotype-to-phenotype association of the patient's infectious disease phenotype and three non-coding polymorphic regions of the TLR2 gene, the -196 to -174 indel, SNP rs4696480, and a (GT)n short tandem repeat. The infectious subphenotypes included (A) recurrent respiratory infections and (B) severe bacterial infection at least once during the patient's follow-up. The absence of the haplotype [Del]-T-[n ≥ 17] (Hap7) in homozygocity protected against subphenotype (B), in a statistically significant association, resisting correction for multiple testing. For the individual loci, the same association tendencies were observed as in the haplotype, including a deleterious association between the SNP rs4696480 T allele and subphenotype (A), whereas the A/A genotype was protective, and a deleterious effect of the A/T genotype with subphenotype (B), as well as including the protective effect of -196 to -174 insert (Ins) and deleterious effect of the deletion (Del) in homozygocity, against subphenotype (B). Moreover, a reduction in the incidence rate of severe bacterial infection was associated to a rise in the hemolytic score, fetal hemoglobin levels (prior to hydroxyurea treatment), and 3.7-kb alpha-thalassemia. Interestingly, differences between the effects of the two latter covariables favoring a reduction in the incidence rate of subphenotype (B) contrast with a resulting increase in relation to subphenotype (A). These results could have practical implications in health care strategies to lower the morbidity and mortality of SCA patientsThis study was carried out with financial support from FCT/MEC through national funds and cofinanced by FEDER, under the Partnership Agreement PT2020, in the project with reference UIDMULTI/00211/2013, and was partially funded by FCT grants PIC/IC/83084/2007 and the Centro de Investigação em Genética Molecular Humana (CIGMH).Springer-Verlag (Germany)Repositório Científico do Instituto Nacional de SaúdeDavid, SusanaAguiar, PedroAntunes, LilianaDias, AlexandraMorais, AnabelaSakuntabhai, AnavajLavinha, João2018-06-30T00:30:12Z2017-06-302017-06-30T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.18/4785engImmunogenetics. 2018 Jan;70(1):37-51. doi: 10.1007/s00251-017-1013-7. Epub 2017 Jun 30.1432-1211ESSN: 0093-771110.1007/s00251-017-1013-7info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-20T15:40:31Zoai:repositorio.insa.pt:10400.18/4785Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:39:33.287683Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia |
title |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia |
spellingShingle |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia David, Susana Agentes Microbianos e Ambiente Determinantes Imunológicos em Doenças Crónicas Determinantes da Saúde e da Doença Doenças Genéticas Epidemiologia Clínica Infecções Respiratórias Patologias do Glóbulo Vermelho Sickle Cellanemia TLR2 Genetic Variants Viral and Bacterial Infection Hemolytic Component Genotype-to-phenotype Association |
title_short |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia |
title_full |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia |
title_fullStr |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia |
title_full_unstemmed |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia |
title_sort |
Variants in the non-coding region of the TLR2 gene associated with infectious subphenotypes in pediatric sickle cell anemia |
author |
David, Susana |
author_facet |
David, Susana Aguiar, Pedro Antunes, Liliana Dias, Alexandra Morais, Anabela Sakuntabhai, Anavaj Lavinha, João |
author_role |
author |
author2 |
Aguiar, Pedro Antunes, Liliana Dias, Alexandra Morais, Anabela Sakuntabhai, Anavaj Lavinha, João |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Repositório Científico do Instituto Nacional de Saúde |
dc.contributor.author.fl_str_mv |
David, Susana Aguiar, Pedro Antunes, Liliana Dias, Alexandra Morais, Anabela Sakuntabhai, Anavaj Lavinha, João |
dc.subject.por.fl_str_mv |
Agentes Microbianos e Ambiente Determinantes Imunológicos em Doenças Crónicas Determinantes da Saúde e da Doença Doenças Genéticas Epidemiologia Clínica Infecções Respiratórias Patologias do Glóbulo Vermelho Sickle Cellanemia TLR2 Genetic Variants Viral and Bacterial Infection Hemolytic Component Genotype-to-phenotype Association |
topic |
Agentes Microbianos e Ambiente Determinantes Imunológicos em Doenças Crónicas Determinantes da Saúde e da Doença Doenças Genéticas Epidemiologia Clínica Infecções Respiratórias Patologias do Glóbulo Vermelho Sickle Cellanemia TLR2 Genetic Variants Viral and Bacterial Infection Hemolytic Component Genotype-to-phenotype Association |
description |
Sickle cell anemia (SCA) is characterized by chronic hemolysis, severe vasoocclusive crises (VOCs), and recurrent often severe infections. A cohort of 95 SCA pediatric patients was the background for genotype-to-phenotype association of the patient's infectious disease phenotype and three non-coding polymorphic regions of the TLR2 gene, the -196 to -174 indel, SNP rs4696480, and a (GT)n short tandem repeat. The infectious subphenotypes included (A) recurrent respiratory infections and (B) severe bacterial infection at least once during the patient's follow-up. The absence of the haplotype [Del]-T-[n ≥ 17] (Hap7) in homozygocity protected against subphenotype (B), in a statistically significant association, resisting correction for multiple testing. For the individual loci, the same association tendencies were observed as in the haplotype, including a deleterious association between the SNP rs4696480 T allele and subphenotype (A), whereas the A/A genotype was protective, and a deleterious effect of the A/T genotype with subphenotype (B), as well as including the protective effect of -196 to -174 insert (Ins) and deleterious effect of the deletion (Del) in homozygocity, against subphenotype (B). Moreover, a reduction in the incidence rate of severe bacterial infection was associated to a rise in the hemolytic score, fetal hemoglobin levels (prior to hydroxyurea treatment), and 3.7-kb alpha-thalassemia. Interestingly, differences between the effects of the two latter covariables favoring a reduction in the incidence rate of subphenotype (B) contrast with a resulting increase in relation to subphenotype (A). These results could have practical implications in health care strategies to lower the morbidity and mortality of SCA patients |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-06-30 2017-06-30T00:00:00Z 2018-06-30T00:30:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.18/4785 |
url |
http://hdl.handle.net/10400.18/4785 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Immunogenetics. 2018 Jan;70(1):37-51. doi: 10.1007/s00251-017-1013-7. Epub 2017 Jun 30. 1432-1211 ESSN: 0093-7711 10.1007/s00251-017-1013-7 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer-Verlag (Germany) |
publisher.none.fl_str_mv |
Springer-Verlag (Germany) |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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