Abstract
Investigation of the function of intracellularly located protein components of receptor-effector transduction pathways has been hampered not only by their inaccessibility, but also by the lack of specific tools. The problem is particularly acute when the effect of interest must be measured at the single cell level, for example, receptor modulation of ion channels. Assignment of different G protein subunits to roles in ion channel modulation by receptors progressed greatly with the availability of antibodies raised against peptide sequences corresponding to the carboxyl-terminus of Gα-subunits. This is the part of the a-subunit molecule thought to interact with effector, so these antibodies were predicted to indirectly occlude receptor-effector interaction. Indeed, we found that injection of an antibody against Gα0, into sympathetic neurons inhibited α2-adrenoceptor effects on Ca2+ current, and antibody against Gαq/11 inhibited muscarinic and bradykinin receptor effects on the M-type K+ current (1,2). However, this approach is seriously limited by the close sequence homologies between members of G protein a-subunit subfamilies (3), which results in the antibodies being unable to discriminate between members in many cases.
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References
Caulfield M. P., Jones S., Vallis Y., Buckley N. J., Kim G.-D., Mulligan G., and Brown D. A. (1994) Muscarinic M-current inhibition via Gαq/11 and α-adrenergic inhibition of Ca2+ current via Gα0 in rat sympathetic neurones. J. Physiol. 477, 415–422.
Jones S., Brown D. A., Milligan G., Willer E., Buckley N. J., and Caulfield M. P. (1995) Bradykinin excites rat sympathetic neurons by mhibition of in current through a mechanism involving B2 receptors and Gαq/11. Neuron 14, 399–405.
Hepler J. R. and Gdman A. G. (1992) G proteins. Trends Biochem. Scz. 17, 383–387.
Kleuss C., Hescheler J., Ewel C., Rosenthal W., Schultz G., and Wittig B. (1991) Assignment of G-protein subtypes to specific receptors inducing inhibition of calcium currents. Nature 353, 43–48.
Akhtar S. and Juliano R. L. (1992) Cellular uptake and intracellular fate of antisense oligonucleotides. Trends Cell Biol 2, 139–144.
Wagner R. (1994) Gene inhibition using antisense oligodeoxynucleotides. Nature 372, 333–335.
ffrench-Mullen J. M. H., Plata-Salaman C. R., Buckley N. J., and Danks P. (1994) Muscarinic modulation by a G-protein α-subunit of delayed rectifier K+ current in rat ventromedial hypothalamic neurones. J. Physiol. 474, 2l–26.
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© 1997 Humana Press Inc.
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Abogadie, F.C., Vallis, Y., Buckley, N.J., Caulfield, M.P. (1997). Use of Antisense-Generating Plasmids to Probe the Function of Signal Transduction Proteins in Primary Neurons. In: Challiss, R.A.J. (eds) Receptor Signal Transduction Protocols. Methods in Molecular Biology™, vol 83. Humana Press. https://doi.org/10.1385/0-89603-495-X:217
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DOI: https://doi.org/10.1385/0-89603-495-X:217
Publisher Name: Humana Press
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