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. 2022 Nov 22:13:1069890.
doi: 10.3389/fgene.2022.1069890. eCollection 2022.

Impact of polymorphisms in genes orchestrating innate immune responses on replication kinetics of Torque teno virus after kidney transplantation

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Impact of polymorphisms in genes orchestrating innate immune responses on replication kinetics of Torque teno virus after kidney transplantation

Natalia Redondo et al. Front Genet. .

Abstract

Background: Torque teno virus (TTV) DNAemia has been proposed as a surrogate marker of immunosuppression after kidney transplantation (KT), under the assumption that the control of viral replication is mainly exerted by T-cell-mediated immunity. However, Tthe impact on post-transplant TTV kinetics of single genetic polymorphisms (SNPs) in genes orchestrating innate responses remains unknown. We aimed to characterize the potential association between 14 of these SNPs and TTV DNA levels in a single-center cohort of KT recipients. Methods: Plasma TTV DNAemia was quantified by real-time PCR in 221 KT recipients before transplantation (baseline) and regularly through the first 12 post-transplant months. We performed genotyping of the following SNPs: CTLA4 (rs5742909, rs231775), TLR3 (rs3775291), TLR9 (rs5743836, rs352139), CD209 (rs735240, rs4804803), IFNL3 (rs12979860, rs8099917), TNF (rs1800629), IL10 (rs1878672, rs1800872), IL12B (rs3212227) and IL17A (rs2275913). Results: The presence of the minor G allele of CD209 (rs4804803) in the homozygous state was associated with undetectable TTV DNAemia at the pre-transplant assessment (adjusted odds ratio: 36.96; 95% confidence interval: 4.72-289.67; p-value = 0.001). After applying correction for multiple comparisons, no significant differences across SNP genotypes were observed for any of the variables of post-transplant TTV DNAemia analyzed (mean and peak values, areas under the curve during discrete periods, or absolute increments from baseline to day 15 and months 1, 3, 6 and 12 after transplantation). Conclusion: The minor G allele of CD209 (rs4804803) seems to exert a recessive protective effect against TTV infection in non-immunocompromised patients. However, no associations were observed between the SNPs analyzed and post-transplant kinetics of TTV DNAemia. These negative results would suggest that post-transplant TTV replication is mainly influenced by immunosuppressive therapy rather than by underlying genetic predisposition, reinforcing its clinical application as a biomarker of adaptive immunity.

Keywords: SNP; TTV replication kinetics; Torque teno virus; kidney transplantation; single-nucleotide polymorphisms.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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References

    1. Alagarasu K., Kaushal H., Shinde P., Kakade M., Chaudhary U., Padbidri V., et al. (2021). TNFA and IL10 polymorphisms and IL-6 and IL-10 levels influence disease severity in influenza A(H1N1)pdm09 virus infected patients. Genes. 12 (12), 1914. 10.3390/genes12121914 - DOI - PMC - PubMed
    1. Ali E. S. G., Bassyouni R. H., Abdelaleem O. O., Hassan E. A., Gaber S. N. (2022). Association between SNPs of Cytotoxic T-lymphocyte-associated protein 4 (CTLA-4), programmed cell death 1 (PD-1)and the susceptibility to chronic Hepatitis C infection in virus C-infected patients. Virus Res. 310, 198684. 10.1016/j.virusres.2022.198684 - DOI - PubMed
    1. Arze C. A., Springer S., Dudas G., Patel S., Bhattacharyya A., Swaminathan H., et al. (2021). Global genome analysis reveals a vast and dynamic anellovirus landscape within the human virome. Cell. Host Microbe 29 (8), 1305–1315.e6. 10.1016/j.chom.2021.07.001 - DOI - PubMed
    1. Biagini P. (2009). Classification of TTV and related viruses (anelloviruses). Curr. Top. Microbiol. Immunol. 331, 21–33. 10.1007/978-3-540-70972-5_2 - DOI - PubMed
    1. Bravo D., Solano C., Gimenez E., Remigia M. J., Corrales I., Amat P., et al. (2014). Effect of the IL28B Rs12979860 C/T polymorphism on the incidence and features of active cytomegalovirus infection in allogeneic stem cell transplant patients. J. Med. Virol. 86 (5), 838–844. 10.1002/jmv.23865 - DOI - PubMed

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