Using T-Cell Subsets to Better Characterize Immunoresiliency and Immunodeficiency in Patients with Recurrent...

Area of Science:

• Immunology
• Biomarker Discovery
• Clinical Assessment

Background:

• Common Variable Immunodeficiency Disease (CVID) and other immunodeficiencies present with subtle and variable clinical manifestations.
• Current biomarkers for quantifying immunodeficiency severity are not well understood.
• There is a need for reliable quantitative biomarkers to assess immunodeficiency severity.

Observation:

• The CD4/CD8 T cell ratio, particularly in the context of HIV literature, correlates with immunologic function and comorbidity.
• Immune Health Grades (IHG) offer a novel ranking system derived from diverse NIH cohorts.
• Most CVID patients exhibit not only antibody deficiencies but also abnormal CD4/CD8 ratios and cellular abnormalities.

Findings:

• Review of HIV literature indicates CD4/CD8 T cell ratios are more informative than CD4 counts alone for assessing immunologic status.
• Analysis of USIDNET data categorizes nine molecular immunodeficiencies, including CVID subtypes, based on CD4/CD8 ratios (low, normal, high).
• Two illustrative cases demonstrate how CD4/CD8 ratios and IHG can refine clinical assessment and management strategies.

Implications:

• Abnormalities in CD4/CD8 ratios and IHG may serve as clinically accessible biomarkers for grouping and monitoring immunodeficiencies.
• These biomarkers offer a quantifiable method to track disease progression or improvement in patients with immune deficiencies.
• Integrating CD4/CD8 ratios and IHG into clinical practice can enhance diagnostic accuracy and therapeutic guidance for immunodeficient patients.