Synthesis and Biological Evaluation of Sigma‐1 (σ1) Receptor Ligands Based on Phenyl‐1,2,4‐oxadiazole Derivatives |
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Authors: | Xudong Cao Zhongyuan Yao Fei Dou Yifang Zhang Yinli Qiu Song Zhao Xiangqing Xu Xin Liu Bi‐Feng Liu Yin Chen Guisen Zhang |
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Abstract: | In this study, a series of phenyl‐1,2,4‐oxadiazole derivatives were synthesized and evaluated for anti‐allodynic activity. Structure–activity relationship studies identified 1‐{4‐[3‐(2,4‐dichlorophenyl)‐1,2,4‐oxadiazol‐5‐yl]butyl}piperidine ( 39 ) with excellent affinity for the σ1 receptor and selectivity for the σ2 receptor, with poor activity to other central nervous system neurotransmitter receptors and transporters associated with pain. Compound 39 exhibited dose‐dependent efficacy in suppressing the formalin‐induced flinching and attenuating mechanical allodynia in chronic constriction injury‐induced neuropathic rats. These results suggest that compound 39 exerts potent antihyperalgesic activity and could be considered as a promising candidate for treating neuropathic pain. |
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Keywords: | anti-allodynic effects formalin-induced flinching mechanical allodynia in CCI phenyl-1,2,4-oxadiazole derivatives sigma receptor biological activity synthesis design. |
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