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Updated: May 14, 2026

Constructing Cyclic Peptides Using an On-Tether Sulfonium Center
Published on: September 28, 2022
Synthesis, characterization and Akt phosphorylation inhibitory activity of cyclopentanecarboxylate-substituted
Md Maqusood Alam1, Eun-Ha Joh, Hyerim Park
1Department of Pharmacy, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea.
Abstract:
Akt is activated in most human cancers and contributes to cell growth, proliferation and cellular survival pathway. Accordingly, it is an attractive target for anticancer therapy. A series of novel alkylphosphocholines, incorporating cyclopentanecarboxylate in the phospholipid head group with trans and cis orientations, were synthesized and evaluated for their Akt phosphorylation inhibitory activities and cytotoxicities against human cancer cell lines, A549, MCF-7 and KATO III. Among the synthesized compounds, 5a, 5b and 6c exhibited potent inhibitory Akt phosphorylation effects with IC50 value of 3.1, 2.0 and 3.0 μM, respectively, and their potencies were better than those of three reference compounds miltefosine, perifosine and edelfosine. All the new compounds, except 5d and 6e, displayed more potent growth inhibition against A549 cells than reference compounds. Specifically, compound 5b exhibited most remarkable cytotoxicities on A549 cells as well as MCF-7 and KATO III cells. Importantly, the cytotoxic effects of these compounds correlated with their Akt phosphorylation inhibitory activities.
Insights
Novel alkylphosphocholines show potent anticancer activity by inhibiting Akt phosphorylation. Compound 5b demonstrated significant cytotoxicity across multiple human cancer cell lines, highlighting its therapeutic potential.
Area of Science:
- Medicinal Chemistry
- Oncology
- Molecular Biology
Background:
- Akt signaling pathway is frequently activated in human cancers, promoting tumor growth, proliferation, and survival.
- Targeting the Akt pathway presents a promising strategy for developing novel anticancer therapies.
Purpose of the Study:
- To synthesize and evaluate novel alkylphosphocholines with modified phospholipid head groups for Akt phosphorylation inhibitory activity.
- To assess the cytotoxic effects of these compounds against human cancer cell lines (A549, MCF-7, KATO III).
Main Methods:
- Synthesis of novel alkylphosphocholine derivatives incorporating cyclopentanecarboxylate.
- In vitro evaluation of Akt phosphorylation inhibitory activity and IC50 values.
- Cytotoxicity assays against A549, MCF-7, and KATO III cancer cell lines.
Main Results:
- Compounds 5a, 5b, and 6c showed potent Akt phosphorylation inhibition (IC50: 3.1, 2.0, 3.0 μM), outperforming reference drugs.
- Most synthesized compounds exhibited superior growth inhibition against A549 cells compared to reference drugs.
- Compound 5b displayed remarkable cytotoxicity across A549, MCF-7, and KATO III cell lines.
Conclusions:
- The novel alkylphosphocholines effectively inhibit Akt phosphorylation and exhibit potent anticancer activity.
- Cytotoxic effects of these compounds are correlated with their Akt phosphorylation inhibitory potential.
- Compound 5b is a promising candidate for further investigation in anticancer drug development.
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