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Function of the GABA and glycine receptors in the mammalian MNTB
Hrušková, Bohdana ; Tureček, Rostislav (advisor) ; Vyklický, Ladislav (referee) ; Horák, Martin (referee)
GABA and glycine are major inhibitory neurotransmitters in the central nervous system. They act on ionotropic and metabotropic receptors that form oligomeric complexes in plasma membrane of neuronal cells. Pharmacological properties, subcellular distribution and function of GABA and glycine receptors depend on their subunit composition. The thesis was aimed to find subunit composition and physiological role of ionotropic glycine and metabotropic GABAB receptors in neurons of medial nucleus of trapezoid body, MNTB. The nucleus resides in the mammalian auditory brainstem and it is characterized by well defined excitatory and inhibitory inputs. Excitatory fibers form giant glutamatergic nerve terminals, calyces of Held, whereas inhibitory fibers form small GABA/glycinergic boutons. Both types of afferents innervate somatodenritic parts of MNTB principal neurons. The nucleus thus represents a suitable model for studying molecular and cellular mechanisms of interactions between excitation and inhibition. Our experiments were performed using electrophysiology and immunohistochemistry methods. Patch clamp technique was used to record membrane currents and voltages from neurons in live MNTB slices isolated from rats or mice. Spontaneous and sound-evoked activity of murine MNTB neurons was recorded by in...

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