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2004 | 09 | 1 |

Tytuł artykułu

Changes of GABAA receptor activation kinetics in hippocampal neurons cultured for different periods of time

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Cell culture is a convenient model for pharmacokinetic studies, but during the culture period, GABAa receptors are likely to undergo different modulatory processes. In this study, the current responses to ultrafast GABA applications were recorded from patches excised from neurons cultured for either up to two days (short-term culture) or for more than two weeks (long-term culture). The dose-dependencies of the currentrising phases revealed significant differences between the two groups. In the short-term cultures, the responses to both saturating and non-saturating GABA concentrations were slower than in the case of the long-term cultures. We conclude that the GABAa receptors in cultured neurons undergo profound kinetic changes involving the modulation of the binding reaction and transitions between bound states.

Wydawca

-

Rocznik

Tom

09

Numer

1

Opis fizyczny

p.61-67,fig.,ref.

Twórcy

  • Wroclaw Medical University, Chalubinskiego 10, 50-368 Wroclaw, Poland
autor

Bibliografia

  • 1. Cherubini, E. and Conti, F. Generating diversity at GABAergic synapses. Trends Neurosci. 24 (2001) 155-162.
  • 2. Rudolph, U., Crestani, F. and Mohler, H. GABAa receptor subtypes: dissecting their pharmacological functions. Trends in Pharm. Sci. 22 (2001) 188-194.
  • 3. Moss, S.J. and Smart, T.G. Constructing inhibitory synapses. Nature Rev. Neurosci. 2 (2001) 240-250.
  • 4. Barnard, E.A., Skolnick, P., Olsen, R.W., Mohler, H., Sieghart, W., Biggio, G., Breastrup, C.M., Bateson, A.N. and Langer, S.Z. International Union of Pharmacology. XV. Subtypes of γ-aminobutyric acidA receptors: Classification on the basis of subunit structure and receptor function. Pharmacol. Rev. 50 (1998) 291-313.
  • 5. Tia, S., Wang, J.F., Kotchabhakdi, N. and Vicini, S. Developmental change of inhibitory synaptic currents in cerebellar granule neurons: Role of GABAa receptor a6 subunit. J. Neurosci. 16 (1996) 3630-3640.
  • 6. Hollrigel, G.S. and Soltesz, I. Slow kinetics of miniature IPSCs during early postnatal development in granule cells of the dentate gyrus. J. Neurosci. 17 (1997) 5119-5128.
  • 7. Ben-Ari, Y., Khazipov, R., Leinekugel, X., Caillard, O. and Gaiarsa, J.L. GABAa, NMDA and AMPA receptors: A developmentally regulated ‘menage a trois’. Trends Neurosci. 11 (1997) 523-529.
  • 8. Brussaard, A.B., Kits, S., Baker, R.E., Williams, W.P., Leyting-Vermeulen, J.W., Voorn, P., Smit A.B., Bickneli, R.J. and Herbison, A.E. Plasticity of fast synaptic inhibition of adult oxytocin neurons caused by switch in GABAa receptor subunit expression. Neuron 19 (1997) 1103-1114.
  • 9. Brussaard, A.B. and Herbison, A.E. Long-term plasticity of postsynaptic GABAa-receptor function in the adult brain: insights from the oxytocin neuron. Trends Neurosci. 23 (2002) 190-195.
  • 10. Loup, F., Wieser, H.G., Yonekawa, Y., Aguzzi, A. and Fritschy, J.M. Selective alterations in GABAa receptor subtypes in human temporal lobe epilepsy. J. Neurosci. 20 (2000) 5401-5419.
  • 11. Poulter, M.O., Brown, L.A., Tynan, S., Willick, G., William, R. and McIntyre, D.C. Differential expression of α1, α2, α3 and α5 GABAa receptor subunits in seizure prone and seizure-resistant rat models of temporal lobe epilepsy. J. Neurosci. 19 (1999) 4654-4661.
  • 12. Mozrzymas, J.W., Barberis, A., Mercik, K. and Zarnowska, E.D. Binding sites cooperativity, singly bound states and conformation coupling shape GABA-evoked currents. J. Neurophysiol. 89 (2003) 871-883.
  • 13. Andjus, P.R., Stevic-Marinkovic, Z. and Cherubini, E. Immunoglobulins from motoneuron disease patients enhance glutamate release from rat hippocampal neurons in culture. J. Physiol. 504 (1997) 103-112.
  • 14. Franke, Ch. and Dudel, J. Liquid filament switch for ultra-fast exchanges of solutions at excised patches at synaptic membranes of crayfish muscle. Neurosci. Lett. 77 (1987) 199-204.
  • 15. Jonas, P., Application of agonists to isolated membrane patches, in: Single channel recordings (Sakmann, B. and Neher, E., Eds.) Plenum Press: New York and London 1995, 231-242.
  • 16. Jones, M.Y. and Westbrook, G.L. Desensitized states prolong GABAa channel responses to brief agonist pulses. Neuron 15 (1995) 181-191.
  • 17. Grabauskas, G. and Bradley, R.M. Postnatal development of inhibitory synaptic transmission in the rostral nucleus of the solitary tract. J. Neurophysiol. 85 (2001) 2203-2012.
  • 18. Clements, J.D. Transmitter time course in the synaptic cleft: its role in central synaptic function. Trends Neurosci. 19 (1996) 163-170.
  • 19. Mozrzymas, J.W., Barberis, A., Michalak, K. and Cherubini, E. Chlorpromazine inhibits miniature GABAergic currents by reducing the binding and by increasing the unbinding rate of GABAa receptors. J. Neurosci. 19 (1999) 2474-2488.
  • 20. Wall, M.J., Howe, R.A. and Usowicz, M.M. The speeding of EPSC kinetics during maturation of a central synapse. Eur. J. Neurosci. 15 (2002) 785-797.

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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