Abstract:
:1. Spontaneous synaptic activity in networks formed by dissociated neurons from embryonic rat midbrain was analyzed in tight seal whole cell recordings. 2. Application of furosemide (0.5 mM) to the cell and its surrounding area increased the frequency of spontaneous synaptic currents. Incubation of the culture with furosemide resulted in "rhythmic" burst activity. 3. Furosemide (0.1-0.5 mM) changed equilibrium potentials of inhibitory postsynaptic currents, gamma-aminobutyric acid-A (GABAA) or glycine receptor-mediated Cl- currents by a blockade of Cl(-)-outward transport. Furosemide did not alter the slope conductance of GABAA receptor-mediated currents. Membrane conductance and cell excitability were also unaffected. 4. We conclude that furosemide locked the activity of the network in "burst activity" mode through impairment of inhibition resulting from the disturbance of Cl- homeostasis.
journal_name
J Neurophysioljournal_title
Journal of neurophysiologyauthors
Jarolimek W,Brunner H,Lewen A,Misgeld Udoi
10.1152/jn.1996.75.6.2654subject
Has Abstractpub_date
1996-06-01 00:00:00pages
2654-7issue
6eissn
0022-3077issn
1522-1598journal_volume
75pub_type
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