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Le(y) antigen expression is correlated with apoptosis (programmed cell death)

K Hiraishi¹, K Suzuki, S Hakomori

¹Japan Immunoresearch Laboratory Co., Ltd, Gunma Prefecture.

|August 1, 1993

Summary

Le(y) expression is a novel phenotypic marker that predicts programmed cell death (apoptosis). This finding suggests Le(y) can identify cells undergoing apoptosis, aiding cancer research and diagnostics.

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Area of Science:

Cell Biology
Cancer Research
Glycobiology

Background:

Apoptosis, or programmed cell death, is crucial for tissue development and homeostasis.
Aberrant glycosylation patterns are linked to cancer and differentiation.
The relationship between specific glycosylation and apoptosis remains underexplored.

Purpose of the Study:

To investigate the potential correlation between specific carbohydrate antigens and apoptosis.
To identify novel biomarkers for apoptosis in normal and cancerous tissues.

Main Methods:

Histological analysis of tumor and normal tissues.
Immunohistochemical staining using monoclonal antibodies against Le(y), Le(x), PCNA, and Fas.
Assessment of morphological and DNA fragmentation patterns indicative of apoptosis.

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Main Results:

Le(y) expression strongly correlated with apoptosis, but not proliferation or necrosis.
Le(y)-positive areas frequently exhibited apoptotic morphology and DNA fragmentation.
Le(y)-positive cells showed minimal staining for proliferation (PCNA) and apoptosis-inducing (Fas) markers.

Conclusions:

Le(y) serves as a valuable phenotypic marker predicting subsequent apoptosis.
Le(y) expression can identify cells undergoing programmed cell death.
This discovery offers potential for improved cancer diagnostics and therapeutic strategies.