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B cell development in the chicken

E L Masteller1, C B Thompson

  • 1Department of Microbiology and Immunology, University of Michigan Medical Center, Ann Arbor 48109.

Poultry Science
|July 1, 1994
PubMed
Summary
This summary is machine-generated.

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Chicken B cell development involves specific cell surface markers. Sialyl Lewis x expression guides B cells to the bursa, while Lewis x and low Lewis x indicate maturation stages crucial for immune response.

Area of Science:

  • Immunology
  • Developmental Biology
  • Glycobiology

Background:

  • Vertebrates require a diverse antibody repertoire for pathogen defense.
  • Chickens generate antibody diversity through gene conversion in the bursa of Fabricius.
  • B cell migration to the bursa is essential for immune repertoire development.

Purpose of the Study:

  • To investigate the role of sialyl Lewis x and Lewis x carbohydrate structures in chicken B cell development and migration.
  • To identify phenotypic markers for distinct stages of chicken B cell maturation.

Main Methods:

  • Analysis of cell surface marker expression (sialyl Lewis x, Lewis x) on developing B cells.
  • Tracking B cell populations in the spleen and bursa of Fabricius during embryonic development.

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Main Results:

  • Sialyl Lewis x expression is detected on B cells migrating to the bursa anlage (embryonic Days 10-12).
  • B cells downregulate sialyl Lewis x and upregulate Lewis x as they initiate gene conversion.
  • Further maturation leads to low Lewis x expression, with these cells appearing in both the bursa and spleen.

Conclusions:

  • Sialyl Lewis x acts as a homing receptor for immature B cells to the bursa of Fabricius.
  • Sequential expression of sialyl Lewis x and Lewis x (high to low) correlates with B cell maturation stages.
  • These distinct glycan markers provide a tool for identifying and studying chicken B cell development.