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Normal and leukemic lymphocyte membrane fluidity and response to stimulation with ConA and PHA
Journal of Tongji Medical University = Tong Ji Yi Ke Da Xue Xue Bao
|January 1, 1989
Summary
Leukemic lymphocytes exhibit significantly higher membrane fluidity than normal lymphocytes. This altered lipid fluidity, measured by fluorescence polarization, may serve as a potential diagnostic marker for leukemia.
Area of Science:
- Cell Biology
- Biophysics
- Immunology
Background:
- Lymphocyte membrane fluidity is crucial for cellular function.
- Altered membrane properties are associated with various diseases, including cancer.
Purpose of the Study:
- To investigate differences in lymphocyte membrane fluidity between normal and leukemic individuals.
- To explore the potential of membrane fluidity as a diagnostic criterion for leukemia.
Main Methods:
- Utilized diphenylhexatriene (DPH) fluorescence probe to label lymphocyte membranes.
- Measured fluorescence polarization (PDPH) to quantify probe rotation and assess membrane fluidity (F value).
- Stimulated lymphocytes with Concanavalin A (ConA) and Phytohemagglutinin (PHA) to observe responses.
Main Results:
- Leukemic lymphocytes demonstrated a significantly higher F value (increased lipid fluidity) compared to normal lymphocytes.
- Cultured leukemic T-suppressor (Ts) lymphocytes exhibited the highest F value.
- Malignant lymphocytes showed decreased PDPH values or increased F values upon stimulation with ConA or PHA.
- T-lymphocytes from non-tumor-injected mice also showed higher F values than mixed lymphocytes.
Conclusions:
- Lymphocyte membrane fluidity is demonstrably altered in leukemia.
- The F value, reflecting lipid fluidity, shows potential as a diagnostic marker for leukemia.
- Further investigation is warranted to validate membrane fluidity as a clinical diagnostic tool.