ELECTROPHYSIOLOGY OF PHAGOCYTIC MEMBRANES .2. MEMBRANE-POTENTIAL AND INDUCTION OF SLOW HYPERPOLARIZATIONS IN ACTIVATED MACROPHAGES

被引：32

作者：

DOSREIS, GA ^{[1
]}

PERSECHINI, PM ^{[1
]}

RIBEIRO, JMC ^{[1
]}

OLIVEIRACASTRO, GM ^{[1
]}

机构：

[1] UNIV FED RIO DE JANEIRO, CTR CIENCIAS SAUDE, ILHA FDN, INST BIOFIS, RIO DE JANEIRO, RJ, BRAZIL

来源：

BIOCHIMICA ET BIOPHYSICA ACTA | 1979年 / 552卷 / 02期

关键词：

(Macrophage membrane); Electrode potential; Electrophysiology; K[!sup]+[!/sup] permeability; Membrane potential;

D O I：

10.1016/0005-2736(79)90287-6

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The potential differences measured on the cell surface and after penetration into the cytoplasm of activated macrophages are described. Linear regressions are made of the measured potential differences as functions of the tip potential of each microelectrode. The surface potential of the macrophage is not significantly different from zero. Mouse macrophages have a transmembrane potential of -26 mV, whereas in guinea-pig cells this value is -18 mV. The input resistances of guinea-pig cells are higher than those of mouse macrophages. The cytoplasmic location of the electrode was characterized both by fluorescent dye injection and by electric criteria. Slow membrane hyperpolarizations are directly elicited by mechanical stimulation. Electric responses evoked by current pulses were further characterized. Our results lead to the establishment of objective criteria to validate intracellular recordings from macrophage. © 1979.

引用

页码：331 / 340

页数：10

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