Interleukin-1 beta depresses calcium currents in CA1 hippocampal neurons at pathophysiological concentrations.
Interleukin-1 is present in the central nervous system (CNS) during acute and chronic pathological processes. In the present study, we examined the interaction between recombinant human interleukin-1 beta (rhIL-1 beta) and the voltage-dependent calcium (Ca2+) current using the whole-cell patch clamp technique. RhIL-1 beta depressed the voltage-gated Ca2+ current in acutely dissociated guinea pig hippocampal CA1 neurons. This depression is rapid and is observed at pathophysiological concentrations (greater than or equal to 1.97 pg/10 microliters). Concomitant application of rhIL-1 beta and rhIL-1 receptor antagonist had no effect indicating neuroactive specificity of rhIL-1 beta. The depression of the inward Ca2+ current by IL-1 beta may play a role in: 1) the regulation of neuronal excitability; 2) the induction of neurological manifestations during disease; and 3) in the induction and/or progression of neurodegenerative processes.
Plata-Salamán
C R
CR
School of Life and Health Sciences, University of Delaware, Newark 19716.
Ffrench-Mullen
J M
JM
D000818:Animals; D002121:Calcium Channel Blockers / Q000494:pharmacology*; D006168:Guinea Pigs; D006624:Hippocampus / Q000166:cytology* / Q000187:drug effects; D066298:In Vitro Techniques; D007375:Interleukin-1 / Q000494:pharmacology* / Q000633:toxicity; D015640:Ion Channel Gating / Q000187:drug effects; D009474:Neurons / Q000187:drug effects / Q000378:metabolism*; D011712:Pyramidal Tracts / Q000166:cytology / Q000187:drug effects; D011994:Recombinant Proteins / Q000494:pharmacology
D002121:Calcium Channel Blockers; D007375:Interleukin-1; D011994:Recombinant Proteins