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Xie XY, Li YY, Ma WH, Chen AF, Sun YT, Lee JY, Riad A, Xu DH, Mach RH, Huang YS. Synthesis, binding, and functional properties of tetrahydroisoquinolino-2-alkyl phenones as selective σ 2R/TMEM97 ligands. Eur J Med Chem 2021; 209:112906. [PMID: 33049607 DOI: 10.1016/j.ejmech.2020.112906] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/01/2020] [Accepted: 10/03/2020] [Indexed: 02/07/2023]
Abstract
Sigma-2 receptor (σ2R/TMEM97) has been implicated to play important roles in multiple cellular dysfunctions, such as cell neoplastic proliferation, neuro-inflammation, neurodegeneration, etc. Selective σ2 ligands are believed to be promising pharmacological tools to regulate or diagnose various disorders. As an ongoing effort of discovery of new and selective σ2 ligands, we have synthesized a series of tetrahydroisoquinolino-2-alkyl phenone analogs and identified that 10 of them have moderate to potent affinity and selectivity for σ2R/TMEM97. Especially, 4 analogs showed Ki values ranging from 0.38 to 5.1 nM for σ2R/TMEM97 with no or low affinity for sigma-1 receptor (σ1R). Functional assays indicated that these 4 most potent analogs had no effects on intracellular calcium concentration and were classified as putative σ2R/TMEM97 antagonists according to current understanding. The σ2R/TMEM97 has been suggested to play important roles in the central nervous system. Based on published pharmacological and clinical results from several regarded σ2R/TMEM97 antagonists, these analogs may potentially be useful for the treatment of various neurodegenerative diseases.
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Affiliation(s)
- Xiao-Yang Xie
- School of Pharmacy, Guangdong Medical University, 1 Xincheng Ave, Songshan Lake Technology Park, Dongguan, Guangdong 523808, China
| | - Yu-Yun Li
- School of Pharmacy, Guangdong Medical University, 1 Xincheng Ave, Songshan Lake Technology Park, Dongguan, Guangdong 523808, China
| | - Wen-Hui Ma
- School of Pharmacy, Guangdong Medical University, 1 Xincheng Ave, Songshan Lake Technology Park, Dongguan, Guangdong 523808, China
| | - Ai-Fang Chen
- School of Pharmacy, Guangdong Medical University, 1 Xincheng Ave, Songshan Lake Technology Park, Dongguan, Guangdong 523808, China
| | - Yu-Tong Sun
- School of Pharmacy, Guangdong Medical University, 1 Xincheng Ave, Songshan Lake Technology Park, Dongguan, Guangdong 523808, China
| | - Ji Youn Lee
- Department of Radiology, University of Pennsylvania, 231 S. 34th St, Philadelphia, PA, 19104, USA
| | - Aladdin Riad
- Department of Radiology, University of Pennsylvania, 231 S. 34th St, Philadelphia, PA, 19104, USA
| | - Dao-Hua Xu
- School of Pharmacy, Guangdong Medical University, 1 Xincheng Ave, Songshan Lake Technology Park, Dongguan, Guangdong 523808, China
| | - Robert H Mach
- Department of Radiology, University of Pennsylvania, 231 S. 34th St, Philadelphia, PA, 19104, USA.
| | - Yun-Sheng Huang
- School of Pharmacy, Guangdong Medical University, 1 Xincheng Ave, Songshan Lake Technology Park, Dongguan, Guangdong 523808, China.
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