A New Routine Immunity Score (RIS2020) to Predict Severe Infection in Solid-Organ Transplant Recipients

Area of Science:

• Immunology
• Transplant Medicine
• Infectious Diseases

Background:

• Infections are a major cause of morbidity and mortality in solid-organ transplantation (SOT).
• Early prediction of infection risk is crucial for timely intervention in SOT recipients.
• Existing risk assessment methods may not fully capture the complex immunological changes post-transplantation.

Purpose of the Study:

• To evaluate a novel score, RIS2020, for predicting severe infections in SOT recipients.
• To identify key immune biomarkers indicative of infection risk in the early post-transplant period.
• To assess the performance of RIS2020 in a prospective cohort.

Main Methods:

• Prospective collection of blood samples from 377 SOT recipients (heart, liver, kidney) across two centers.
• Analysis of immune biomarkers (IgG, CD4, C3, CRP) at pre-transplant, day 7, and day 30 post-transplant.
• Development of the RIS2020 score based on hazard ratios of significant biomarkers and logistic regression analysis.

Main Results:

• 48.5% of patients developed severe infections within 6 months post-transplant.
• Key predictors identified: moderate IgG hypogammaglobulinemia, low CD4 count, low C3 levels, and elevated CRP levels at day 30.
• Patients with RIS2020 scores ≥4 had a significantly higher risk of infection (HR 5.18).
• RIS2020 demonstrated independent predictive value in multivariate models.

Conclusions:

• The RIS2020 score, integrating innate and acquired immunity markers, effectively identifies SOT patients at high risk for severe infections.
• This immunological score can enhance early risk stratification and guide personalized monitoring strategies.
• Further validation of RIS2020 may improve patient outcomes in SOT.