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Updated: Oct 2, 2025
Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay
Published on: February 9, 2021
Synthesis of 8-Fluoroneocryptolepine and Evaluation for Cytotoxic Activity against AGS Cancer Cells
Yun-Hao Ma1, Wan-Tong Ma1, Zhong-Kun Zhou1
1School of Pharmacy, Lanzhou University, 199 Donggang West Road, Lanzhou, 730000, People's Republic of China.
Abstract:
Neocryptolepine derivatives have attracted great interest because of their unique cytotoxic activity. 8-Fluoroneocryptolepine (8FNC) was synthesized, and its cytotoxicity was evaluated by MTT assay in AGS gastric cancer cells and gastric mucosa GES-1 cells. 8-Fluoroneocryptolepine showed greater selectivity and cytotoxicity to AGS cells than the cisplatin (CIS) and fluorouracil (5-Fu) commonly used in clinical treatment of gastric cancer. Most importantly, we significantly improved the cytotoxic effect of 8FNC against AGS cells by structural modification and reduced the cytotoxicity against GES-1 cells compared with neocryptolepine. We further evaluated the activity of 8FNC against AGS cells in vitro. Our results indicate that 8FNC arrests the AGS cell cycle in the G2/M phase, reduces the mitochondrial membrane potential of AGS cells, and drives the initiation of apoptotic body formation in 8FNC-induced apoptosis. Moreover, 8FNC exhibits strong inhibitory effects on AGS cell migration. Studies on the molecular mechanisms of the cytotoxic activities of 8FNC revealed that it may play a significant role in the inhibitory effect on AGS human gastric cancer cells through the PI3K/AKT signaling pathway. In conclusion, 8FNC may become a promising lead compound in the development of potential clinical drug candidates for the treatment of gastric cancer.
Insights
8-Fluoroneocryptolepine (8FNC) demonstrates potent and selective cytotoxicity against gastric cancer cells, outperforming current treatments. Structural modifications further enhance its efficacy and safety, suggesting its potential as a novel gastric cancer therapeutic.
Area of Science:
- Medicinal Chemistry
- Cancer Biology
- Pharmacology
Background:
- Neocryptolepine derivatives exhibit unique cytotoxic properties.
- Gastric cancer remains a significant global health challenge with limited effective treatments.
Purpose of the Study:
- To synthesize and evaluate the cytotoxic activity of 8-Fluoroneocryptolepine (8FNC) against gastric cancer cells.
- To compare 8FNC's efficacy and selectivity with existing chemotherapeutic agents.
- To investigate the mechanisms underlying 8FNC's anti-cancer effects.
Main Methods:
- Synthesis of 8-Fluoroneocryptolepine.
- Cytotoxicity evaluation using MTT assay in AGS gastric cancer cells and GES-1 cells.
- Cell cycle analysis, mitochondrial membrane potential assessment, and apoptosis induction studies.
- Investigation of the PI3K/AKT signaling pathway.
Main Results:
- 8FNC displayed superior cytotoxicity and selectivity towards AGS gastric cancer cells compared to cisplatin and fluorouracil.
- Structural modification of 8FNC enhanced its cytotoxic effect on AGS cells while reducing toxicity to normal gastric cells.
- 8FNC induced G2/M cell cycle arrest, reduced mitochondrial membrane potential, and promoted apoptosis in AGS cells.
- 8FNC significantly inhibited AGS cell migration.
- The PI3K/AKT signaling pathway was implicated in 8FNC's mechanism of action.
Conclusions:
- 8-Fluoroneocryptolepine is a potent and selective anti-gastric cancer agent.
- Structural optimization of 8FNC yields improved therapeutic potential.
- 8FNC warrants further investigation as a lead compound for novel gastric cancer drug development.
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