NDLI: Annexins from Ehrlich ascites cells inhibit the calcium-activated chloride current in Xenopus laevis oocytes

Content Provider	Springer Nature Link
Author	Jørgensen, Anders J. Bennekou, P. Eskesen, Karen Kristensen, Berit I.
Copyright Year	1997
Abstract	The effect of annexins II, III and V, purified from different species, on the calcium-activated chloride current across the stage-V to stage-VI Xenopus laevis oocyte membrane was tested either directly, using calcium entry mediated by depolarization, by A23187 permeabilization of oocytes or indirectly by quisqualate stimulation of a metabotropic glutamate receptor in the membrane expressed by the oocyte after injection of mRNA. The annexins isolated from the Ehrlich ascites cell, which is a mouse tumor cell, were found to be potent inhibitors of the chloride current, showing half-maximal inhibition at 50 nM, whereas no block was found using bovine or porcine annexins isolated from lung tissue. Of the annexins tested, we found annexin III to be naturally occurring in the oocyte, while only trace amounts of annexins II and V could be demonstrated. The inhibition pattern varied somewhat according to the stimulus method, the inhibition being more complete when an indirect stimulus via the metabotropic receptor was applied compared to a direct calcium stimulus.
Starting Page	261
Ending Page	266
Page Count	6
File Format	PDF
ISSN	00316768
Journal	Pflügers Archiv
Volume Number	434
Issue Number	3
e-ISSN	14322013
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-06-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical) Clinical Biochemistry

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