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Variable gene usage, physiology and development of Ly-1+ (CD5+) B cells.
1Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia.
Current Opinion in Immunology
|April 1, 1992
Summary
Ly-1+ B cells, also known as CD5+ B cells, are a distinct memory population generated during early development. Their specificities and gene usage are shaped by self-reactivity selection, differentiating them from conventional B cells.
Area of Science:
- Immunology
- Cell Biology
Background:
- Ly-1+ B cells (CD5+ B cells in humans) exhibit distinct specificities and variable gene usage compared to conventional Ly-1- B cells.
- An emerging model proposes Ly-1+ B cells function as a memory population in adult animals.
Purpose of the Study:
- To investigate the developmental origins and selection mechanisms of Ly-1+ B cells.
- To understand the relationship between Ly-1+ B cells and conventional Ly-1- B cells.
Main Methods:
- Analysis of Ly-1+ B cell specificities.
- Assessment of variable gene usage in Ly-1+ B cells.
- Comparison with Ly-1- B cell populations.
Main Results:
- Ly-1+ B cell generation is primarily restricted to fetal and neonatal development.
- Selection processes acting on germline-encoded self-reactivity shape the adult Ly-1+ B cell repertoire.
Conclusions:
- Ly-1+ B cells represent a specialized memory B cell subset with unique developmental and selection pathways.
- Self-reactivity plays a crucial role in shaping the repertoire of adult Ly-1+ B cells.