Brain Res Mol Brain Res 1997 Apr 01;451:169-72. doi: 10.1016/s0169-328x(97)00008-9.

Glycine receptors from long-sleep and short-sleep mice: genetic differences in drug sensitivity.

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The long-sleep (LS) and short-sleep (SS) mice were selected for differences in sensitivity to ethanol but also differ in response to propofol and some neurosteroids. To determine the role of strychnine-sensitive glycine receptors in genetic differences between these mice, effects of propofol, ethanol and pregnenolone sulfate on glycine responses were compared in Xenopus oocytes expressing mRNA extracted from spinal cord of LS and SS mice. The two lines of mice did not differ in sensitivity to glycine, ethanol or pregnenolone sulfate. However, receptors expressed from LS mRNA were more sensitive to the potentiation induced by propofol than those from SS. Binding of [3H]strychnine to spinal cord membranes demonstrated a similar affinity and density of receptors in LS and SS. These results suggest that glycine receptor function could account for differences in propofol sensitivity between LS and SS mice, but may not be responsible for the differences in behavioral sensitivity to ethanol or steroids previously reported.

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