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Fas-induced apoptosis in B cells

T Mizuno1, X Zhong, T L Rothstein

  • 1Department of Medicine, Boston University School of Medicine, and the Immunobiology Unit, Evans Memorial Department of Clinical Research, Boston University Medical Center, Boston, MA 02118, USA.

Apoptosis : an International Journal on Programmed Cell Death
|September 17, 2003
PubMed

Insights

Engagement of Fas (CD95) triggers apoptosis in B cells. Receptor interactions modify Fas sensitivity, impacting immune homeostasis and diseases like autoimmune disorders and cancers.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Fas/APO-1 (CD95) is a cell surface receptor crucial for initiating apoptosis.
  • B cells, like other cell types, undergo apoptosis upon Fas engagement.
  • Fas expression and function in B cells are modulated by other cell surface receptors, influencing apoptosis susceptibility.

Purpose of the Study:

  • To investigate the role and regulation of Fas-mediated apoptosis in B cells.
  • To understand how interactions with other receptors affect B cell sensitivity to Fas-induced cell death.
  • To explore the connection between B cell Fas sensitivity, immune homeostasis, and disease pathogenesis.

Main Methods:

  • Analysis of Fas/APO-1 (CD95) receptor engagement and downstream signaling pathways in B cells.
  • Investigating the impact of co-engagement of additional cell surface receptors on Fas-mediated apoptosis.
  • Correlating B cell Fas sensitivity with immune homeostasis markers and disease states.

Main Results:

  • Fas engagement reliably induces apoptosis in B cells.
  • The sensitivity of B cells to Fas-induced apoptosis exhibits significant variation dependent on the engagement of other specific cell surface receptors.
  • Altered Fas signaling in B cells is linked to disruptions in immune system homeostasis and contributes to autoimmune and malignant conditions.

Conclusions:

  • Fas-mediated apoptosis is a critical process in B cell regulation.
  • Modulation of Fas sensitivity by other receptors highlights a complex regulatory network in B cells.
  • Dysregulation of B cell Fas sensitivity is implicated in the pathophysiology of autoimmune diseases and cancers, underscoring its importance in immune surveillance and disease.

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