Literature DB >> 2449252

Potassium channel "inactivation" induced by soft-glass patch pipettes.

G Cota1, C M Armstrong.   

Abstract

We have studied the potassium currents of rat pituitary pars intermedia cells kept in primary culture using whole-cell recording with patch pipettes. The potassium current recorded with hard-glass pipettes is mainly carried by voltage-dependent channels that show slow inactivation in the presence of 0.5 mM internal EGTA. Fast "inactivation" of the potassium current is seen with patch pipettes fabricated from soft glass (soda glass or potash lead glass), and is probably caused by block of the potassium channels by di- or multivalent cations released from the glass.

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Year:  1988        PMID： 2449252      PMCID： PMC1330127          DOI： 10.1016/S0006-3495(88)83071-6

Source DB:  PubMed          Journal:  Biophys J        ISSN： 0006-3495            Impact factor:   4.033


  7 in total

1.  Potassium channels in cultured bovine adrenal chromaffin cells.

Authors:  A Marty; E Neher
Journal:  J Physiol       Date:  1985-10       Impact factor: 5.182

2.  Membrane currents in identified lactotrophs of rat anterior pituitary.

Authors:  C J Lingle; S Sombati; M E Freeman
Journal:  J Neurosci       Date:  1986-10       Impact factor: 6.167

3.  Improved patch-clamp techniques for high-resolution current recording from cells and cell-free membrane patches.

Authors:  O P Hamill; A Marty; E Neher; B Sakmann; F J Sigworth
Journal:  Pflugers Arch       Date:  1981-08       Impact factor: 3.657

4.  Membrane currents of identified isolated rat corticotropes and gonadotropes.

Authors:  C Marchetti; G V Childs; A M Brown
Journal:  Am J Physiol       Date:  1987-03

5.  Interaction of barium ions with potassium channels in squid giant axons.

Authors:  C M Armstrong; S R Taylor
Journal:  Biophys J       Date:  1980-06       Impact factor: 4.033

6.  Calcium channel currents in pars intermedia cells of the rat pituitary gland. Kinetic properties and washout during intracellular dialysis.

Authors:  G Cota
Journal:  J Gen Physiol       Date:  1986-07       Impact factor: 4.086

7.  Block of squid axon K channels by internally and externally applied barium ions.

Authors:  C M Armstrong; R P Swenson; S R Taylor
Journal:  J Gen Physiol       Date:  1982-11       Impact factor: 4.086
  7 in total
  20 in total

1.  Membrane-pipette interactions underlie delayed voltage activation of mechanosensitive channels in Xenopus oocytes.

Authors:  Z Gil; K L Magleby; S D Silberberg
Journal:  Biophys J       Date:  1999-06       Impact factor: 4.033

2.  Voltage-dependent currents in isolated cells of the frog retinal pigment epithelium.

Authors:  B A Hughes; R H Steinberg
Journal:  J Physiol       Date:  1990-09       Impact factor: 5.182

3.  Giga-seal formation alters properties of sodium channels of human myoballs.

Authors:  C Fahlke; R Rüdel
Journal:  Pflugers Arch       Date:  1992-03       Impact factor: 3.657

4.  Transient outward K+ channels in vesicles derived from frog skeletal muscle plasma membranes.

Authors:  J Camacho; M J Delay; M Vazquez; C Argüello; J A Sánchez
Journal:  Biophys J       Date:  1996-07       Impact factor: 4.033

5.  Membrane and junctional properties of dissociated frog lens epithelial cells.

Authors:  K Cooper; J L Rae; P Gates
Journal:  J Membr Biol       Date:  1989-11       Impact factor: 1.843

6.  TEA prevents inactivation while blocking open K+ channels in human T lymphocytes.

Authors:  S Grissmer; M Cahalan
Journal:  Biophys J       Date:  1989-01       Impact factor: 4.033

7.  Analysis of electrophysiological properties and responses of neutrophils.

Authors:  Deri Morgan; Thomas E Decoursey
Journal:  Methods Mol Biol       Date:  2014

Review 8.  Application of patch clamp methods to the study of calcium currents and calcium channels.

Authors:  C A Leech; G G Holz
Journal:  Methods Cell Biol       Date:  1994       Impact factor: 1.441

9.  Single cardiac outwardly rectifying K+ channels modulated by protein kinase A and a G-protein.

Authors:  I Benz; U Fröbe; M Kohlhardt
Journal:  Eur Biophys J       Date:  1991       Impact factor: 1.733

10.  Permeance of Cs+ and Rb+ through the inwardly rectifying K+ channel in guinea pig ventricular myocytes.

Authors:  R L Mitra; M Morad
Journal:  J Membr Biol       Date:  1991-05       Impact factor: 1.843
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