Polygenic Innate Immunity Score to Predict the Risk of Cytomegalovirus Infection in CMV D+/R- Transplant Recipients....

Area of Science:

• Immunogenetics
• Transplant Medicine
• Virology

Background:

• Genetic polymorphisms in the innate immune system are linked to increased cytomegalovirus (CMV) infection risk in transplant recipients.
• Predicting CMV infection and disease is crucial for managing high-risk transplant patients.

Purpose of the Study:

• To assess the predictive impact of a polygenic score for CMV infection and disease in high-risk transplant recipients (heart, liver, kidney, pancreas).

Main Methods:

• Prospective study of 116 CMV-seronegative recipients from CMV-seropositive donors receiving valganciclovir prophylaxis.
• Genotyping of single nucleotide polymorphisms (SNPs) in innate immune genes (TLR2, TLR3, TLR4, TLR7, TLR9, AIM2, MBL2, IL28, IFI16, MYD88, IRAK2, IRAK4) using RT-PCR or PCR-SBT.
• Development of a polygenic CMV score based on specific SNPs (TLR4, TLR9, TLR3, AIM2, TLR7, MBL, IFNL3/IL28B, IFI16).

Main Results:

• CMV infection occurred in 53% of patients, with 24% developing CMV disease.
• The developed CMV polygenic score predicted CMV disease risk with an AUC of 0.68.
• The score demonstrated 64.3% sensitivity and 71.6% specificity in predicting CMV disease.

Conclusions:

• A polygenic score incorporating specific innate immune SNPs shows potential for predicting CMV disease risk in transplant recipients.
• Further validation is needed, but this score could form the basis for more robust risk prediction models, especially in D+/R- mismatches.