[Neuregulin-1 temperature-dependently inhibits the long-term potentiation in the CA1 region in mouse hippocampal slices].
OBJECTIVE
To investigate the effect of neurogulin-1 (NRG1) on the transmission and plasticity of CA1 synapses in mouse hippocampal slices at different temperatures.


METHODS
Under room temperature (26-/+1 degrees C) or physiological temperature (32-/+1 degrees C), field excitatory postsynaptic potential (fEPSP) evoked by extracellular microelectrode recording technique was recorded in the CA1 region in adult mouse hippocampal slices, and the long-term potentiation (LTP) was induced by high frequency stimulation (HFS). The effects of NRG1 on the baseline fEPSP and induction of LTP in CA1 region were observed.


RESULTS
No significant variation in the slope of fEPSP relative to the baseline fEPSP was observed after perfusion with NRG1 at room temperature or physiological temperature (P > 0.05). After HFS at the room temperature, the mean slope of fEPSP in the slices perfused with NRG1 was similar to that of the control group (P > 0.05), but HFS at the physiological temperature resulted in significant reduction in the mean slope of fEPSP in the slices perfused with NRG1 (P < 0.01).


CONCLUSIONS
NRG1 may temperature-dependently inhibit the induction of LTP in the CA1 region in mouse hippocampal slices.
Chen
Yong-jun
YJ
Department of Neurobiology, Southern Medical University, Guangzhou 510515, China.
Zhang
Meng
M
Wang
Pu
P
Zhu
Xin-hong
XH
Gao
Tian-ming
TM
D000818:Animals; D006624:Hippocampus / Q000502:physiology*; D017774:Long-Term Potentiation / Q000502:physiology*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D020890:Neuregulin-1 / Q000502:physiology*; D009473:Neuronal Plasticity / Q000502:physiology; D009435:Synaptic Transmission / Q000502:physiology; D013696:Temperature
D020890:Neuregulin-1