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Single-cell Analysis of Immunophenotype and Cytokine Production in Peripheral Whole Blood via Mass Cytometry
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B-cell subsets in leprosy lesions: unraveling the complex interplay
Luis Alberto Ribeiro Fróes1, Carla Pagliari1, Maria Angela Bianconcini Trindade2
1Department of Pathology, Faculty of Medicine, Universidade de São Paulo, São Paulo, SP, Brazil.
Anais Brasileiros De Dermatologia
|August 10, 2025
Summary
This study reveals distinct B-cell subset distributions in leprosy, with B1 and Marginal Zone B-cells prominent in Type 1 Reactions and tuberculoid leprosy, suggesting specific roles in immune responses.
Area of Science:
- Immunology
- Infectious Diseases
- Dermatology
Background:
- Leprosy involves complex immune interactions, but B-lymphocyte subset roles are unclear.
- Understanding B-cell subsets is crucial for leprosy pathogenesis.
Purpose of the Study:
- To investigate B-cell subsets (B1, Marginal Zone B-cells, Regulatory B-cells, Effector-1 B-cells) in leprosy.
- To analyze their distribution across clinical forms and reactional states.
Main Methods:
- Immunohistochemical and morphometric analyses of leprosy skin lesions.
- Evaluation of B-cell subset presence and distribution.
Main Results:
- Abundant CD20+ B-cells in tuberculoid leprosy.
- Increased B1 and Marginal Zone B-cells in Type 1 Reactions (T1R) compared to other forms.
- Effector-1 B-cells and Regulatory B-cells were more prevalent in Th1-associated leprosy and T1R.
- Specific B-cell patterns observed in tuberculoid leprosy and T1R.
Conclusions:
- This study is the first to map specific B-cell subsets in leprosy lesions.
- Findings suggest distinct roles for B-lymphocyte subsets in leprosy, especially in tuberculoid forms and Type 1 Reactions.
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