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- W2405548462 abstract "A series of reduced-size hexapeptide analogues of LH-RH were synthesized that contain the residues corresponding to amino acid positions 4-9 and are linked to various carboxylic acids in place of residue 3. These compounds were tested in vitro in the rat pituitary receptor binding and LH release assays. A wide range of binding affinities was obtained up to and exceeding that of LH-RH. Both agonists and antagonists were obtained. From the SAR studies, it appears that a very precise size, length, and shape of the substituent at position 3 is required to achieve agonist activity, whereas the structural requirements for antagonist activity appear to be much less stringent. Depending on the nature of the substituent at positions 6 and 4, the biological response switches from antagonist to agonist or vice versa. The results suggest that conformational changes at position 6 or 4 feed back to the substituent at position 3, which induces the change from agonist to antagonist. The most potent compounds in the series were tested in vivo and found to be active." @default.
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- W2405548462 date "1989-10-01" @default.
- W2405548462 modified "2023-09-23" @default.
- W2405548462 title "Active reduced-size hexapeptide analogs of luteinizing hormone-releasing hormone" @default.
- W2405548462 doi "https://doi.org/10.1021/jm00130a019" @default.
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