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Protein kinase C modulation in apoptotic rat thymocytes: an ultrastructural analysis
O Trubiani1, P Borgatti, R Di Primio
1Istituto di Citomorfologia Normale e Patologica del CNR, Chieti, Italy.
Histochemistry
|October 1, 1994
Summary
Protein kinase C (PKC) plays a role in programmed cell death. Dexamethasone treatment caused PKC to increase and move to the nucleus during thymocyte apoptosis.
Area of Science:
- Cell biology
- Molecular biology
- Biochemistry
Background:
- Signal transduction pathways involving protein kinase C (PKC) regulate crucial cellular events like gene expression, growth, and metabolism.
- Emerging evidence suggests a PKC-dependent mechanism is involved in glucocorticoid-induced apoptosis.
Purpose of the Study:
- To investigate the changes in PKC during dexamethasone-induced apoptosis in thymocytes.
- To elucidate the subcellular localization and dynamics of PKC during this apoptotic process.
Main Methods:
- Immunocytochemical analysis of thymocytes.
- Immunochemical analysis of PKC.
- Assessment of PKC translocation during apoptosis.
Main Results:
- PKC levels were observed to increase during dexamethasone-induced apoptosis.
- Intracellular movement of PKC was detected.
- PKC was found to translocate to the nucleus and associate with the nuclear matrix.
Conclusions:
- PKC is involved in the apoptotic pathway triggered by glucocorticoids in thymocytes.
- Nuclear translocation and association with the nuclear matrix are key events for PKC during dexamethasone-induced apoptosis.