title: [Nature of the membrane depolarization of a nerve cell during the application of protein S-100 antibodies].
abstract: Application of antibodies to S-100 protein (the antibody concentration in the micropipette being 0.05 mg/ml) induced 13 +/- 4 mV depolarization of the membrane of snail Helix neurons. Non-immune gamma-globulin used in the control experiments caused no changes in the membrane potential. Antibody-induced depolarization was accompanied by a 2.5 nA inward current which was voltage-independent in the range of membrane potential from 50 to 110 mV. Hyperpolarization observed after the rinsing of antibodies was effectively blocked by a specific blocker of monovalent cation transport, ouabain, at a concentration of 5 X 10(-4) M. The absence of antibody-induced changes in the passive membrane conduction and the activation of electrogenic transport mechanisms after the antibody removal suggest possible involvement of Na, K- ATPase into the effect described.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000502:physiology*; D002462:Cell Membrane / Q000187:drug effects / Q000502:physiology; D006372:Helix, Snails; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects; D009474:Neurons / Q000187:drug effects / Q000502:physiology*; D009418:S100 Proteins / Q000276:immunology*; D005719:gamma-Globulins / Q000494:pharmacology
chemical_list: D000906:Antibodies; D009418:S100 Proteins; D005719:gamma-Globulins
vernacular_title: Izuchenie prirody depoliarizatsii membrany nervnoĭ kletki pri applikatsii antitel k belku S-100.