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Novel dimeric Smac analogs as prospective anticancer agents.

Ewa D Micewicz¹, Hai T Luong², Chun-Ling Jung²

¹Department of Radiation Oncology, University of California at Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA.

Bioorganic & Medicinal Chemistry Letters

|March 4, 2014

Summary

Researchers developed novel bivalent Smac analogs that show potent anticancer effects against human breast cancer cell lines. In vivo studies demonstrated significant tumor growth delay, suggesting a promising new therapeutic platform.

Keywords:

Apoptosis New anticancer agents Peptides S-alkylation of peptides Smac mimics

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Area of Science:

Medicinal Chemistry
Oncology
Drug Discovery

Background:

Smac (Second Mitochondria-derived Activator of Caspases) mimetics are investigated for cancer therapy.
Targeting apoptosis pathways is a key strategy in oncology.

Purpose of the Study:

To synthesize and evaluate novel monovalent Smac mimics.
To develop and test oligomerized bivalent and trivalent Smac analogs for enhanced anticancer activity.

Main Methods:

Synthesis of a library of monovalent Smac mimics.
In vitro screening against human breast cancer cell lines (MCF-7, MDA-MB-231).
Oligomerization of active compounds via S-alkylation.
In vivo testing of the most potent bivalent analog in a mouse model.

Main Results:

Identification of active monovalent Smac mimics.
Generation of bivalent and trivalent Smac analogs with improved activity.
The bivalent analog SMAC17-2X demonstrated significant tumor growth delay (approx. 23.4 days) in vivo at a 7.5 mg/kg dose.
SMAC17-2X showed potent anticancer effects in physiological conditions.

Conclusions:

Bivalent Smac analogs synthesized via S-alkylation represent a promising therapeutic platform.
These analogs hold potential for the development of novel anticancer drugs.
Further development of these bivalent Smac analogs is warranted for clinical applications.