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Dual Piperidine-Based Histamine H and Sigma-1 Receptor Ligands in the Treatment of Nociceptive and Neuropathic Pain.
Authors
Szczepańska K, Karcz T, Dichiara M, Mogilski S, Kalinowska-Tłuścik J, Pilarski B, Leniak A, Pietruś W, Podlewska S, Popiołek-Barczyk K, Humphrys LJ, Ruiz-Cantero MC, Reiner-Link D, Leitzbach L, Łażewska D, Pockes S, Górka M, Zmysłowski A, Calmels T, Cobos EJ, Marrazzo A, Stark H, Bojarski AJ, Amata E, Kieć-Kononowicz KAbstract
In search of new dual-acting histamine H/sigma-1 receptor ligands, we designed a series of compounds structurally based on highly active ligands previously studied and described by our team. However, we kept in mind that within the previous series, a pair of closely related compounds, and , differing only in the piperazine/piperidine moiety in the structural core showed a significantly different affinity at sigma-1 receptors (σRs). Therefore, we first focused on an in-depth analysis of the protonation states of piperazine and piperidine derivatives in the studied compounds. In a series of 16 new ligands, mainly based on the piperidine core, we selected three lead structures (, , and ) for further biological evaluation. Compound showed a broad spectrum of analgesic activity in both nociceptive and neuropathic pain models based on the novel molecular mechanism.