Polymorphisms within the ARNT2 and CX3CR1 genes are associated with the risk of developing invasive aspergillosis

Lupianez CB, Martinez-Bueno M, Sanchez-Maldonado JM, Badiola J, Cunha C, Springer J, Lackner M, Segura-Catena J, Canet LM, Alcazar-Fuoli L, Lopez-Nevot MA, Fianchi L, Aguado JM, Pagano L, Lopez-Fernandez E, Alarcon-Riquelme M, Potenza L, Goncalves SM, Luppi M, Moratalla L, Solano C, Sampedro A, Gonzalez-Sierra P, Cuenca-Estrella M, Lagrou K, Maertens JA, Lass-Floerl C, Einsele H, Vazquez L, Loeffler J, Rios-Tamayo R, Carvalho A, Jurado M, Sainz J (2020)

Publication Type: Journal article

Publication year: 2020


Book Volume: 88

Article Number: e0088219

Journal Issue: 4

DOI: 10.1128/IAI.00882-19


Invasive aspergillosis (IA) is a life-threatening infection that affects an increasing number of patients undergoing chemotherapy or allo-transplantation, and recent studies have shown that genetic factors contribute to disease susceptibility. In this two-stage, population-based, case-control study, we evaluated whether 7 potentially functional single nucleotide polymorphisms (SNPs) within the ARNT2 and CX3CR1 genes influence the risk of IA in high-risk hematological patients. We genotyped selected SNPs in a cohort of 500 hematological patients (103 of those had been diagnosed with proven or probable IA), and we evaluated their association with the risk of developing IA. The association of the most interesting markers of IA risk was then validated in a replication population, including 474 subjects (94 IA and 380 non-IA patients). Functional experiments were also performed to confirm the biological relevance of the most interesting markers. The meta-analysis of both populations showed that carriers of the ARNT2rs1374213G, CX3CR1rs7631529A, and CX3CR1rs9823718G alleles (where the RefSeq identifier appears as a subscript) had a significantly increased risk of developing IA according to a log-additive model (P value from the meta-analysis [PM eta] = 9.8 · 10-5, PM eta = 1.5 · 10-4, and PM eta = 7.9 · 10-5, respectively). Haplotype analysis also confirmed the association of the CX3CR1 haplotype with AGCGG with an increased risk of IA (P = 4.0 · 10-4). Mechanistically, we observed that monocyte-derived macrophages (MDM) from subjects carrying the ARNTR2rs1374213G allele or the GG genotype showed a significantly impaired fungicidal activity but that MDM from carriers of the ARNT2rs1374213G and or CX3CR1rs7631529A alleles had deregulated immune responses to CX3CR1rs9823718G Aspergillus conidia. These results, together with those from expression quantitative trait locus (eQTL) data browsers showing a strong correlation of the CX3CR1rs9823718G allele with lower levels of CX3CR1 mRNA in whole peripheral blood (P = 2.46 · 10-7) and primary monocytes (P = 4.31 · 10-7), highlight the role of the ARNT2 and CX3CR1 loci in modulating and predicting IA risk and provide new insights into the host immune mechanisms involved in IA development.

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Lupianez, C.B., Martinez-Bueno, M., Sanchez-Maldonado, J.M., Badiola, J., Cunha, C., Springer, J.,... Sainz, J. (2020). Polymorphisms within the ARNT2 and CX3CR1 genes are associated with the risk of developing invasive aspergillosis. Infection and Immunity, 88(4). https://doi.org/10.1128/IAI.00882-19


Lupianez, C. B., et al. "Polymorphisms within the ARNT2 and CX3CR1 genes are associated with the risk of developing invasive aspergillosis." Infection and Immunity 88.4 (2020).

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