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Related Experiment Videos

Prohibitin expression is increased in phorbol ester-treated chronic leukemic B-lymphocytes.

T J Woodlock1, G Bethlendy, G B Segel

  • 1Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, USA.

Blood Cells, Molecules & Diseases
|February 13, 2001
PubMed
Summary
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This study shows that prohibitin protein increases during B-cell maturation in chronic lymphocytic leukemia (CLL) and normal cells. This suggests prohibitin may play a role in facilitating B-cell maturation.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • Chronic lymphocytic leukemia (CLL) involves the accumulation of immature B-lymphocytes.
  • CLL B-lymphocytes can mature to a plasmacytoid phenotype in vitro.
  • Maturation is linked to changes in protein expression, including heat shock protein 60 (hsp60).

Purpose of the Study:

  • To investigate the role of the mitochondrial protein prohibitin in B-cell maturation.
  • To quantify prohibitin levels in mature versus immature CLL B-cells.
  • To assess the effect of prohibitin modulation on B-cell maturation.

Main Methods:

  • In vitro culture of CLL and normal B-lymphocytes with phorbol esters.
  • Mass spectrometry to detect mitochondrial proteins.

Related Experiment Videos

  • Quantitative Western immunoblot analysis to measure prohibitin concentration.
  • Antisense oligonucleotide treatment to inhibit prohibitin gene expression.

    • Main Results:

    • Prohibitin was detected in phorbol-ester-matured CLL B-lymphocytes.
    • A twofold increase in prohibitin concentration was observed in matured CLL B-cells compared to resting cells.
    • Similar prohibitin increases occurred in mature normal human B-lymphocytes.
    • Antisense oligonucleotide treatment reduced prohibitin increase by 42% in treated CLL B-cells.

    Conclusions:

    • Increased prohibitin expression is associated with B-cell maturation.
    • Prohibitin may facilitate the maturation process in both CLL and normal B-lymphocytes.
    • These findings highlight prohibitin as a potential factor in B-cell differentiation.