A dual role for interleukin-1 in LTP in mouse hippocampal slices.
Interleukin-1 (IL-1) exerts numerous effects in the central nervous system and has been implicated in synaptic plasticity. The objective of this study was to investigate the role of endogenous as well as exogenous IL-1 on long-term potentiation (LTP). Hippocampal slices incubated at 34-36 degrees C show enhanced levels of IL-1alpha and IL-1beta compared to slices incubated at 21-24 degrees C. IL-1 inhibits LTP induced by theta-burst stimulation (TBS) at either temperature. IL-1 receptor antagonist (IL-1ra) had no effect on LTP at 21-24 degrees C, but displayed a concentration-dependent inhibition of LTP at 34-36 degrees C. Under control conditions, the magnitude of LTP was not temperature dependent. These data suggest that IL-1 is required for LTP under physiological conditions but at higher doses, as encountered in pathological conditions, IL-1 inhibits LTP.
School of Biological Sciences, University of Manchester, 1.124 Stopford Building, Oxford Road, Manchester, M13 9PT, UK. fiona.m.ross@man.ac.uk
Fiona M
FM
Ross
Stuart M
SM
Allan
Nancy J
NJ
Rothwell
Alexej
A
Verkhratsky
D000818:Animals; D016207:Cytokines / Q000096:biosynthesis / Q000378:metabolism; D004306:Dose-Response Relationship, Immunologic; D005260:Female; D006624:Hippocampus / Q000276:immunology* / Q000378:metabolism / Q000502:physiology; D006801:Humans; D066298:In Vitro Techniques; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1 / Q000096:biosynthesis / Q000378:metabolism / Q000502:physiology*; D017774:Long-Term Potentiation / Q000276:immunology*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D051381:Rats; D017472:Receptors, Interleukin-1 / Q000037:antagonists & inhibitors; D011994:Recombinant Proteins / Q000494:pharmacology; D012795:Sialoglycoproteins / Q000494:pharmacology; D015854:Up-Regulation / Q000276:immunology
D016207:Cytokines; C507763:IL1RN protein, human; C507764:Il1rn protein, mouse; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1; D017472:Receptors, Interleukin-1; D011994:Recombinant Proteins; D012795:Sialoglycoproteins