Hypotonic cell swelling induces translocation of the α isoform of cytosolic phospholipase A2 but not the γ isoform in Ehrlich ascites tumor cells

2000 ◽  
Vol 267 (17) ◽  
pp. 5531-5539 ◽  
Author(s):  
Susanne Pedersen ◽  
Ian H. Lambert ◽  
Steinar M. Thoroed ◽  
Else K. Hoffmann
Keyword(s):  
Phospholipase A2 ◽  
Tumor Cells ◽  
Cytosolic Phospholipase A2 ◽  
Ehrlich Ascites Tumor ◽  
Cell Swelling ◽  
Ehrlich Ascites Tumor Cells ◽  
Ascites Tumor ◽  
Cytosolic Phospholipase ◽  
Ehrlich Ascites ◽  
Hypotonic Cell Swelling

Analysis of structural changes during hypotonic swelling in Ehrlich ascites tumor cells

1986 ◽  
Vol 251 (1) ◽  
pp. C104-C114 ◽  
Author(s):  
E. H. Wilkerson ◽  
D. R. DiBona ◽  
J. A. Schafer
Keyword(s):  
Tumor Cells ◽  
Structural Changes ◽  
Ehrlich Ascites Tumor ◽  
Cell Swelling ◽  
Ground Substance ◽  
Computer Assisted ◽  
Ehrlich Ascites Tumor Cells ◽  
Ascites Tumor ◽  
Volume Regulatory Decrease ◽  
Ehrlich Ascites

Studies were undertaken to quantify structural changes associated with swelling of Ehrlich ascites tumor cells in hypotonic medium. Cells transferred from isotonic (294 mosmol/kg H2O) to hypotonic (98 mosmol/kg H2O) medium swelled rapidly. Subsequently, approximately 40% of the water initially gained was lost, a phenomenon referred to as volume-regulatory decrease (VRD). During the initial rapid cell swelling, blister-like protrusions or blebs were formed on the cell surface. These blebs were examined by routine light microscopy, differential interference-contrast (DIC) microscopy, and scanning and transmission electron microscopy. Microscopic observations and the distribution of ATPase antibodies indicated that the blebs were formed from plasma membrane. During VRD, the blebs coalesced to form a smooth but expanded membrane surface that appeared to be separated from the original cytoplasm by a layer of less dense ground substance. Computer-assisted morphometry from digitized DIC images of the initial swelling phase indicated that all of the volume gained was sequestered in the blebs. We suggest that bleb formation may allow increases in cell volume without disruption of cytoplasmic organization and may be a protective response to a variety of stressful stimuli. The subsequent VRD is accompanied by reduction of this expanded compartment.

Cell Swelling Activates Phospholipase A 2 in Ehrlich Ascites Tumor Cells

1997 ◽  
Vol 160 (1) ◽  
pp. 47-58 ◽  
Author(s):  
S.M. Thoroed ◽  
L. Lauritzen ◽  
I.H. Lambert ◽  
H.S. Hansen ◽  
E.K. Hoffmann
Keyword(s):  
Tumor Cells ◽  
Ehrlich Ascites Tumor ◽  
Phospholipase A ◽  
Cell Swelling ◽  
Ehrlich Ascites Tumor Cells ◽  
Ascites Tumor ◽  
Ehrlich Ascites ◽  
Phospholipase A 2
Sign in / Sign up

Export Citation Format

Share Document