Antisense peptides: tools for receptor isolation? Lack of antisense MSH and ACTH to interact with their sense peptides and to induce receptor-specific antibodies.
The use of antisense peptides for receptor isolation as proposed by Blalock and his colleagues (e.g. TIBTECH 8, 140-144, 1990) was tested for human ACTH as well as alpha- and beta-MSH. We synthesized the corresponding antisense peptides HTCAh, HSM-alpha and HSM-beta and analyzed them for specific interaction with the sense peptides using several types of binding assay and bioassay. Similarly HTCAh antibodies were tested for binding to ACTH receptors and ACTH antibodies. All these experiments were negative, i.e. there was no specific interaction between sense and antisense peptides nor between the corresponding antibodies. Receptor binding of the sense peptides was not affected by the antisense peptides or HTCAh antibodies. Unexpectedly, HTCAh but not HSM-alpha or HSM-beta was a weak MSH agonist acting through a site independent of the MSH receptor. A detailed analysis of the concept of antisense peptides revealed that the theoretical background of the hypothesis of the 'molecular recognition theory' is rather weak, explaining the failure of various attempts to obtain specific receptor antibodies.[1]References
- Antisense peptides: tools for receptor isolation? Lack of antisense MSH and ACTH to interact with their sense peptides and to induce receptor-specific antibodies. Eberle, A.N., Huber, M. J. Recept. Res. (1991) [Pubmed]
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