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Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles PPAs and Related Biomaterials

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Modulation of oncogenic miRNA biogenesis using functionalized polyamines.

Cathy Staedel¹, Thi Phuong Anh Tran², Julie Giraud³

¹Université de Bordeaux, INSERM, ARNA, 33076, Bordeaux, France. cathy.staedel@inserm.fr.

Scientific Reports

|January 28, 2018

Summary

This summary is machine-generated.

Researchers identified polyamine derivatives that inhibit the oncogenic miR-372 microRNA. This discovery offers a promising new strategy for developing cancer therapeutics by targeting microRNA biogenesis.

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Area of Science:

Biochemistry
Molecular Biology
Oncology

Background:

MicroRNAs (miRNAs) are crucial regulators of gene expression, and their dysregulation is implicated in various diseases, including cancer.
Targeting oncogenic miRNAs with small molecules is a promising therapeutic strategy.

Purpose of the Study:

To screen for compounds that interfere with the processing of oncogenic microRNAs.
To identify novel inhibitors of miR-372, a microRNA implicated in cancer.

Main Methods:

Screening of a 640-compound library to identify inhibitors of Dicer-mediated processing of pre-miR-372.
Biochemical assays to determine binding affinity (K_D) and inhibitory concentration (IC₅₀).
Cell-based assays in gastric cancer cells and patient-derived ex vivo cultures to assess biological activity and selectivity.

Main Results:

Identified polyamine derivatives, particularly a spermine-amidine conjugate, as potent inhibitors of pre-miR-372 processing.
The lead compound exhibited high affinity (K_D = 0.15 µM) and inhibitory activity (IC₅₀ = 1.06 µM) in vitro.
Inhibition of miR-372 biogenesis in cancer cells led to decreased proliferation via de-repression of the tumor suppressor LATS2.

Conclusions:

Functionalized polyamines represent a novel class of agents capable of interfering with oncogenic miRNA biogenesis.
The identified spermine-amidine conjugate demonstrates selective activity and therapeutic potential for cancers overexpressing miR-372.
This study establishes a foundation for developing polyamine-based therapeutics targeting oncogenic miRNAs.