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Published on: February 10, 2014
Differential internalisation of mGluR1 splice variants in response to agonist and phorbol esters in permanently
1Medical Research Council Anatomical Neuropharmacology Unit, Oxford, UK.
Abstract:
The internalisation of metabotropic glutamate receptor (mGluR1alpha) and its splice variant (mGluR1beta), in response to agonist and phorbol esters (PMA), has been studied. Both mGluR1alpha and mGluR1beta exhibit a similar rate of internalisation following PMA treatment, with a shift in their distribution from plasma membrane to endosome-enriched membrane fractions. Agonist challenge however caused a rapid loss, within 5-10 min, of mGluR1beta but not mGluR1alpha from the cell surface. These results show that the two forms of mGluR1 show different internalisation responses to agonist and suggest that the C-terminal region of the molecule plays an important role in this phenomenon.
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