Document Detail

Calcium ion triggers rapid morphological oscillation of chloride cells in the mudskipper, Periophthalmus modestus.
MedLine Citation:
PMID:  12122459     Owner:  NLM     Status:  MEDLINE    
Euryhaline teleosts rapidly regulate their ion flux at the chloride cells on entry to different salinities. The external trigger(s) for the rapid opening and closing of the chloride cell apical surface, the site of salt secretion, were examined in the skin of the mudskipper. With DASPEI (a mitochondrial probe) and Concanavalin-A (an apical surface marker of chloride cells), chloride cells were classified into two groups: those in contact and those not in contact with the external water. The fraction of chloride cells in contact with the water increased dramatically 1.5 h after transfer to seawater, and similarly after transfer to 10 mmol x l(-1) CaCl(2) solution. In comparison, transfer to 1.1 mol x l(-1) mannitol, 0.5 mol x l(-1) NaCl or 50 mmol x l(-1) MgCl(2) resulted in increases of only 40-60% of those in the seawater-transfer group. After return of the fish from 10 mmol x l(-1) CaCl(2) to freshwater, the cells in contact with the water decreased. Environmental Ca(2+) is the trigger for the morphological oscillation of chloride cell apical surface, presumably through modifications in Ca(2+) flux.
T Sakamoto; M Ando
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2002-06-19
Journal Detail:
Title:  Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology     Volume:  172     ISSN:  0174-1578     ISO Abbreviation:  J. Comp. Physiol. B, Biochem. Syst. Environ. Physiol.     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-07-17     Completed Date:  2003-02-03     Revised Date:  2009-06-08    
Medline Journal Info:
Nlm Unique ID:  8413200     Medline TA:  J Comp Physiol B     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  435-9     Citation Subset:  IM    
Faculty of Integrated Arts and Sciences, Room C310, Hiroshima University, 1-7-1 Kagamiyama, Higashi-hiroshima 739-8521, Japan.
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MeSH Terms
Calcium / metabolism*
Calcium Chloride / pharmacology
Chlorides / metabolism*
Epithelial Cells / drug effects,  metabolism
Fishes / physiology*
Fresh Water
Gills / cytology,  metabolism
Water-Electrolyte Balance / physiology*
Reg. No./Substance:
0/Chlorides; 10043-52-4/Calcium Chloride; 7440-70-2/Calcium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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