Impact of CD38 Deficiency on B Cell Development in CD19-Deficient Mice
A Abrego-Peredo1, C A Gallardo-Hernández2, G López-Herrera3
1Facultad de Ciencias Químicas, Universidad Autónoma Benito Juárez Oaxaca, Oaxaca, México.
Scandinavian Journal of Immunology
|July 29, 2026
Summary
The simultaneous absence of CD38 and CD19 proteins in mice reduced survival and altered B-cell populations in the spleen. While B-cell maturation in bone marrow was normal, peripheral B-cell development showed defects, particularly in marginal zone B cells.
Area of Science:
- Immunology
- Cell Biology
- Hematology
Background:
- Physical interaction between CD38 and CD19 proteins is known.
- The role of CD38 and CD19 in B lymphocyte development requires further investigation.
Purpose of the Study:
- To investigate the combined role of CD38 and CD19 in B-cell development and function.
- To analyze B-cell maturation, peripheral B-cell populations, and splenic B-cell development in mice lacking both CD38 and CD19.
Main Methods:
- Generation of double knockout (DKO) mice lacking both CD38 and CD19 (Cd38-/-Cd19-/-).
- Comparative analysis of B-cell populations in bone marrow (BM) and spleen between DKO mice, wild-type (WT) mice, Cd38-/-, and Cd19-/- mice.
- Assessment of B-cell subsets including T1, T2, mature B cells, marginal zone (MZ) B cells, and follicular (FO) B cells.
Main Results:
- Cd38-/-Cd19-/- mice exhibited reduced survival compared to WT mice.
- B-cell maturation in the bone marrow was comparable to WT mice, but splenic B-cell numbers and development were reduced.
- Significant depletion of MZ B cells and an opposing effect on FO B cells were observed in DKO mice, with notable differences compared to Cd19-/- mice.
Conclusions:
- The combined absence of CD38 and CD19 impacts peripheral B-cell populations and splenic development.
- While B-cell maturation in the bone marrow appears normal, the spleen shows significant alterations, especially in MZ B cells.
- Further research is warranted to explore the functional consequences on B-cell activation, proliferation, immunoglobulin secretion, and germinal center formation.
