To identify B-cell-based predictors of immune competence (the ability to mount an effective immune response) in solid organ transplant recipients (SOTRs) by correlating B-cell phenotypes with serologic responses to SARS-CoV-2 vaccination.
Key Findings:
Three distinct B-cell groups identified in SOTRs correlated with serum responses to SARS-CoV-2 vaccination, highlighting the need for tailored clinical approaches.
Group 1 had a naive-dominant B-cell pool with serologic responses closest to healthcare workers, indicating a better immune response.
Group 2 had reduced naive B cells and hyperexpanded memory B cells with variable vaccine responses, suggesting a need for monitoring.
Group 3 exhibited lymphopenia across B-cell subsets and poor serologic responses, indicating significant immune impairment.
Reduced clonal diversity in antibody repertoires across SOTRs, regardless of memory B cell numbers, suggests a compromised immune landscape.
Interpretation:
B-cell subset analysis can serve as a rapid measure of immune competence in SOTRs, aiding in risk assessment and potential interventions, such as adjusting immunosuppressive therapy.
Limitations:
Study limited to a specific cohort of SOTRs and healthcare workers, which may affect generalizability; for example, different transplant types may respond differently.
Potential confounding factors related to immunosuppressive therapy and comorbidities, such as diabetes or hypertension, which could influence immune responses.
Conclusion:
B-cell classification reveals a hierarchy of immune impairment in SOTRs, suggesting its utility for evaluating immunocompetence and guiding clinical decisions.
by James J Knox, Ingi Lee, Emily A Blumberg, Aaron M Rosenfeld, Wenzhao Meng, Fang Liu, Charlotte Kearns, Una O’Doherty, Abraham Shaked, Kim M Olthoff, Eline T Luning Prak
A retrospective cohort study of more than 520,000 hospitalized patients found no clinically meaningful improvement in deterioration or mortality with early treatment targeting community-acquired pneumonia.
