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Morphological changes in rat aortic endothelial cell line stimulated by endothelin
X Xin1, Y Cai, M Chikamori-Aoyama
1Institute for Animal Experimentation, School of Medicine, University of Tokushima, Japan.
The Tokushima Journal of Experimental Medicine
|December 1, 1994
Summary
Endothelin-1 (ET-1) causes significant cell changes in rat aortic endothelial cells within 8 hours, including cell enlargement and cytoplasmic vesicles. These ET-1-induced morphological alterations suggest stimulation of DNA synthesis and product secretion.
Area of Science:
- Endocrinology
- Cell Biology
- Vascular Biology
Background:
- Endothelin (ET)-1 is known to activate interleukin (IL)-6 production in endothelial cells.
- Previous research established ET-1's role in IL-6 signaling in rat aortic endothelial cells (WAE-1).
Purpose of the Study:
- To investigate the specific morphological changes induced by ET-1 in cultured WAE-1 cells.
- To determine the time-dependent effects of ET-1 on endothelial cell morphology.
Main Methods:
- Cultured WAE-1 cells were treated with ET-1 for 8 hours and 24 hours.
- Morphological assessments were performed using light and electron microscopy and compared to untreated control cells.
Main Results:
- ET-1 treatment for 8 hours induced significant cell enlargement and cytoplasmic vesicle formation in WAE-1 cells.
- Electron microscopy revealed increased nuclear membrane infoldings, denser chromatin near the nuclear membrane, and cytoplasmic multivesicular bodies after 8 hours of ET-1 exposure.
- These pronounced morphological changes were not evident in cells treated with ET-1 for 24 hours.
Conclusions:
- ET-1 rapidly induces distinct morphological alterations in WAE-1 cells within 8 hours.
- The observed changes suggest that ET-1 stimulates DNA synthesis and the secretion of cytoplasmic products in these endothelial cells.
- The transient nature of these morphological effects indicates a complex, time-sensitive response to ET-1 signaling.