Intracellular Chloride Regulation in AVP+ and VIP+ Neurons of the Suprachiasmatic Nucleus

作者: Nathan J. Klett , Charles N. Allen

DOI: 10.1038/S41598-017-09778-X

关键词: TransporterEndocrinologySuprachiasmatic nucleusBumetanideInternal medicineExcitatory postsynaptic potentialReceptorChemistryCircadian rhythmIntracellularInhibitory postsynaptic potentialBiophysics

摘要: Several reports have described excitatory GABA transmission in the suprachiasmatic nucleus (SCN), master pacemaker of circadian physiology. However, there is disagreement regarding prevalence, timing, and neuronal location SCN. Whether inhibitory or depends, part, on intracellular concentration chloride ([Cl−]i). Here, using ratiometric Cl− imaging, we investigated regulation AVP VIP-expressing SCN neurons found evidence suggesting that [Cl−]i higher during day than night both AVP+ VIP+ neurons. We then contribution cation cotransporters to setting these uptake transporter NKCC1 contributes neurons, but KCCs are primary regulators Interestingly, observed differentially regulated between neurons-a low loop diuretic bumetanide had differential effects while blocking with VU0240551 a larger effect compared

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