Pockes, Steffen and Wifling, David and Buschauer, Armin and Elz, Sigurd (2019) Structure-Activity Relationship of Hetarylpropylguanidines Aiming at the Development of Selective Histamine Receptor Ligands. CHEMISTRYOPEN, 8 (3). pp. 285-297. ISSN 2191-1363,
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New classes of alkylated hetarylpropylguanidines with different functionality and variation in spacer length were synthesized to determine their behavior at the four histamine receptor (H1R, H2R, H3R, H4R) subtypes. Alkylated guanidines with different terminal functional groups and varied basicity, like amine, guanidine and urea were developed, based on the lead structure SK&F 91486 (2). Furthermore, heteroatomic exchange at the guanidine structure of 2 led to simple analogues of the lead compound. Radioassays at all histamine receptor subtypes were accomplished, as well as organ bath studies at the guinea pig (gp) ileum (gpH(1)R) and right atrium (gpH(2)R). Ligands with terminal functionalization led to, partially, highly affine and potent structures (two digit nanomolar), which showed up a bad selectivity profile within the histamine receptor family. While the benzoylurea derivative 144 demonstrated a preference towards the human (h) H3R, S-methylisothiourea analogue 143 obtained high affinity at the hH(4)R (pK(i)=8.14) with moderate selectivity. The molecular basis of the latter finding was supported by computational studies.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | G-ACYLATED IMIDAZOLYLPROPYLGUANIDINES; IN-VITRO PHARMACOLOGY; H-4 RECEPTOR; H3 RECEPTOR; HIGHLY POTENT; 1ST POTENT; H-2-RECEPTOR; CLONING; AGONIST; BINDING; histamine H1-4 receptor; ligand design; receptor subtype selectivity; organ pharmacology; computational chemistry |
| Subjects: | 600 Technology > 615 Pharmacy |
| Divisions: | Chemistry and Pharmacy > Institute of Pharmacy Chemistry and Pharmacy > Institute of Pharmacy > Pharmaceutical/Medicinal Chemistry I (Prof. Elz) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Apr 2020 06:25 |
| Last Modified: | 16 Apr 2020 06:25 |
| URI: | https://pred.uni-regensburg.de/id/eprint/27419 |
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