spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Strohmeier, R.
Right arrow Articles by Bereiter-Hahn, J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Strohmeier, R.
Right arrow Articles by Bereiter-Hahn, J.

Journal of Cell Science, Vol 88, Issue 5 631-640, Copyright © 1987 by Company of Biologists

JOURNAL ARTICLES

Hydrostatic pressure in epidermal cells is dependent on Ca-mediated contractions

R Strohmeier and J Bereiter-Hahn
Cinematic Cell Research Group, F. W. Goethe University, Frankfurt, Federal Republic of Germany.

Volume/osmotic pressure relationships were compared in Xenopus epidermal cells treated with the calcium antagonist lanthanum and in control cells. In lanthanum-treated cells the volume was found to be proportional to the reciprocal of the osmotic pressure in the hypotonic range, but not in the control cells. This difference is interpreted as being caused by contractions of the actomyosin system in control cells, which require external calcium. On the basis of the different slopes of the measurements under these two conditions the contractile force of the cells in isotonic conditions was calculated to be 0.96 x 10(5)Nm-2. The observation that in hypotonic media the cell body is enlarged in the direction of movement provides evidence that the cell body/lamella transition region is the part of the cell that contracts most during locomotion. By analysing cell speed in media with varying osmotic pressures, the relationship between internal pressure and cell locomotion was revealed.


This article has been cited by other articles:


Home page
 J. Cell Sci.Home page
K. Yoshida and T. Soldati
Dissection of amoeboid movement into two mechanically distinct modes
J. Cell Sci., September 15, 2006; 119(18): 3833 - 3844.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
C. Rotsch, K. Jacobson, and M. Radmacher
Dimensional and mechanical dynamics of active and stable edges in motile fibroblasts investigated by using atomic force microscopy
PNAS, February 2, 1999; 96(3): 921 - 926.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1987