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Updated: Jul 16, 2026

Phospho Flow Cytometry with Fluorescent Cell Barcoding for Single Cell Signaling Analysis and Biomarker Discovery
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Btk and phospholipase C gamma 2 can function independently during B cell development.

Kristina E Halcomb1, Cristina M Contreras, Rochelle M Hinman

  • 1Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX 75390-8884, USA.

European Journal of Immunology
|March 21, 2007
PubMed
Summary

Bruton

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Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

Area of Science:

  • Immunology and Molecular Biology
  • B cell development and signaling pathways

Background:

  • B cell receptor (BCR) signaling is crucial for B cell development.
  • The B cell linker protein (BLNK) adaptor protein nucleates BCR signalosomes.
  • Bruton's tyrosine kinase (Btk) and phospholipase C (PLC) gamma2 are key downstream effectors.

Purpose of the Study:

  • To investigate the distinct and overlapping functions of Btk and PLCgamma2 in B cell development.
  • To elucidate their roles in BCR signaling and cellular processes.

Main Methods:

  • Generation and analysis of Btk(-/-)PLCgamma2(-/-) double knockout mice.
  • Phenotypic characterization of B cell development, surface receptor expression, and signaling.
  • Assessment of B cell proliferation, ERK phosphorylation, Iglambda expression, and pre-B cell migration.

Main Results:

  • Btk and PLCgamma2 double deficiency caused a severe block in B cell development at the pre-B stage with increased pre-BCR expression.
  • Both kinases are essential for splenic B cell proliferation and ERK phosphorylation, but with differential contributions.
  • Reduced Iglambda expression and impaired pre-B cell migration were observed in single knockouts, with distinct effects on pre-B cell malignancy compared to BLNK(-/-) mice.

Conclusions:

  • Btk and PLCgamma2 play both cooperative and independent roles in regulating B cell development and signaling.
  • Their functions are critical for multiple stages of B cell maturation, from development to migration and proliferation.
  • Understanding these distinct roles is vital for comprehending B cell biology and associated immunodeficiencies.