TY - JOUR
T1 - Structural combination of established 5-HT(2A) receptor ligands
T2 - new aspects of the binding mode
AU - Kramer, Vasko
AU - Herth, Matthias M
AU - Santini, Martin A
AU - Palner, Mikael
AU - Knudsen, Gitte M
AU - Rösch, Frank
N1 - © 2010 John Wiley & Sons A/S.
PY - 2010/10
Y1 - 2010/10
N2 - MH.MZ, MDL 100907, and altanserin are structurally similar 4-benzoyl-piperidine derivatives and are well accommodated to receptor interaction models. We combined structural elements of different high-affinity and selective 5-HT(2A) antagonists, as MH.MZ, altanserin, and SR 46349B, to improve the binding properties of new compounds. Three new derivatives were synthesized with a 4-benzoyl-piperidine moiety as the lead structure. The in vitro affinity of the novel compounds was determined by a [³H]MDL 100907 competition binding assay. The combination of MH.MZ and SR 46349B resulted in a compound (8) with a moderate affinity toward the 5-HT(2A) receptor (K(i) = 57 nm). The remarkably reduced affinity of other compounds (4a), (4b), and (4c) (K(i) = 411, 360 and 356 nm respectively) indicates that MH.MZ can only bind to the 5-HT(2A) receptor with the p-fluorophenylethyl residue in a sterically restricted hydrophobic binding pocket.
AB - MH.MZ, MDL 100907, and altanserin are structurally similar 4-benzoyl-piperidine derivatives and are well accommodated to receptor interaction models. We combined structural elements of different high-affinity and selective 5-HT(2A) antagonists, as MH.MZ, altanserin, and SR 46349B, to improve the binding properties of new compounds. Three new derivatives were synthesized with a 4-benzoyl-piperidine moiety as the lead structure. The in vitro affinity of the novel compounds was determined by a [³H]MDL 100907 competition binding assay. The combination of MH.MZ and SR 46349B resulted in a compound (8) with a moderate affinity toward the 5-HT(2A) receptor (K(i) = 57 nm). The remarkably reduced affinity of other compounds (4a), (4b), and (4c) (K(i) = 411, 360 and 356 nm respectively) indicates that MH.MZ can only bind to the 5-HT(2A) receptor with the p-fluorophenylethyl residue in a sterically restricted hydrophobic binding pocket.
KW - Binding, Competitive
KW - Combinatorial Chemistry Techniques
KW - Fluorobenzenes/chemistry
KW - Hydrophobic and Hydrophilic Interactions
KW - Ketanserin/analogs & derivatives
KW - Ligands
KW - Phenols/chemistry
KW - Piperidines/chemistry
KW - Protein Binding
KW - Pyridines/chemistry
KW - Receptor, Serotonin, 5-HT2A/chemistry
KW - Serotonin 5-HT2 Receptor Antagonists/chemistry
U2 - 10.1111/j.1747-0285.2010.01011.x
DO - 10.1111/j.1747-0285.2010.01011.x
M3 - Journal article
C2 - 20636331
SN - 1747-0277
VL - 76
SP - 361
EP - 366
JO - Chemical Biology & Drug Design
JF - Chemical Biology & Drug Design
IS - 4
ER -