Literature DB >> 7354852

Free calcium in Xenopus embryos measured with ion-selective microelectrodes.

T J Rink, R Y Tsien, A E Warner.   

Abstract

A regulatory role for intracellular free calcium has been suggested in cell division and intercellular communication via gap junctions. Previous measurements of cytoplasmic free Ca2+ during cell division and uncoupling have been made with the Ca2+-sensitive photoprotein aequorin. We now report experiments using Ca2+-sensitive microelectrodes to monitor free Ca2+ in the cells and intercellular fluid of early embryos of the amphibian Xenopus laevis. In addition to measuring basal levels, we have looked for changes in free Ca2+ during cell division and during electrical uncoupling of the normally coupled embryonic cells, induced by acidification of the intracellular medium.

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Year:  1980        PMID： 7354852     DOI： 10.1038/283658a0

Source DB:  PubMed          Journal:  Nature        ISSN： 0028-0836            Impact factor:   49.962


  44 in total

1.  Fluctuation of the Ca-sequestering activity of permeabilized sea urchin embryos during the cell cycle.

Authors:  F A Suprynowicz; D Mazia
Journal:  Proc Natl Acad Sci U S A       Date:  1985-04       Impact factor: 11.205

2.  Membrane currents of internally perfused neurones of the snail, Lymnaea stagnalis, at low intracellular pH.

Authors:  L Byerly; W J Moody
Journal:  J Physiol       Date:  1986-07       Impact factor: 5.182

3.  Lowering extracellular sodium or pH raises intracellular calcium in gastric cells.

Authors:  P A Negulescu; T E Machen
Journal:  J Membr Biol       Date:  1990-07       Impact factor: 1.843

4.  Increase in gap junction resistance with acidification in crayfish septate axons is closely related to changes in intracellular calcium but not hydrogen ion concentration.

Authors:  C Peracchia
Journal:  J Membr Biol       Date:  1990-01       Impact factor: 1.843

5.  An endogenous calcium oscillator may control early embryonic division.

Authors:  C A Swanson; A P Arkin; J Ross
Journal:  Proc Natl Acad Sci U S A       Date:  1997-02-18       Impact factor: 11.205

Review 6.  Fluorescence and bioluminescence measurement of cytoplasmic free calcium.

Authors:  P H Cobbold; T J Rink
Journal:  Biochem J       Date:  1987-12-01       Impact factor: 3.857

7.  Seed Dormancy in Red Rice : VIII. Embryo Acidification during Dormancy-Breaking and Subsequent Germination.

Authors:  S Footitt; M A Cohn
Journal:  Plant Physiol       Date:  1992-11       Impact factor: 8.340

8.  Ungulate cardiac purkinje fibres: the influence of intracellular pH on the electrical cell-to-cell coupling.

Authors:  W R Reber; R Weingart
Journal:  J Physiol       Date:  1982-07       Impact factor: 5.182

9.  Intracellular pH in human and experimental hypertension.

Authors:  L M Resnick; R K Gupta; R E Sosa; M L Corbett; J H Laragh
Journal:  Proc Natl Acad Sci U S A       Date:  1987-11       Impact factor: 11.205

10.  Intracellular calcium measurements by 19F NMR of fluorine-labeled chelators.

Authors:  G A Smith; R T Hesketh; J C Metcalfe; J Feeney; P G Morris
Journal:  Proc Natl Acad Sci U S A       Date:  1983-12       Impact factor: 11.205
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