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ZO-1 expression shows prognostic value in chronic B cell leukemia
Pavel P Nesmiyanov1, Boris E Tolkachev2, Andrey V Strygin3
1Fundamental Medicine and Biology Department, Volgograd State Medical University, Volgograd, Russia; Belozersky Research Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia.
Immunobiology
|August 27, 2015
Summary
Zonula Occludens protein-1 (ZO-1) and connexin 43 (Cx43) expression is reduced in chronic B-cell leukemia (B-CLL) lymphocytes. This finding suggests their potential as prognostic markers for B-CLL monitoring.
Area of Science:
- Oncology
- Cell Biology
- Immunology
Background:
- Connexin-mediated gap junctions are crucial for tumor cell function.
- Zonula Occludens protein-1 (ZO-1) acts as an intermediate in intracellular connexin signaling pathways.
Purpose of the Study:
- To investigate the expression patterns of ZO-1 and connexin 43 (Cx43) in lymphocytes from patients with chronic B-cell leukemia (B-CLL).
- To explore the correlation between ZO-1 and Cx43 expression and other B-CLL markers.
- To assess the impact of inhibiting intercellular communication on B-CLL cell apoptosis.
Main Methods:
- Western blot and flow cytometry were employed to quantify ZO-1 and Cx43 protein expression in B cells from 113 B-CLL patients.
- Intercellular communication was inhibited using anti-Cx43 antibodies, 1-octanol, and carbenoxolone.
Main Results:
- Reduced expression of ZO-1 and Cx43 was observed in B-CLL lymphocytes.
- A negative correlation was found between ZO-1 and Cx43 expression and the expression of CD38 and Zap-70.
- Inhibition of intercellular communication led to induced apoptosis in B-CLL cells.
Conclusions:
- ZO-1, CD38, and Zap-70 are implicated in the cell cycle regulation of B-CLL.
- The expression levels of ZO-1 and Cx43 may serve as valuable prognostic markers for monitoring B-CLL progression.
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