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Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells

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Alternative Splicing in Adhesion- and Motility-Related Genes in Breast Cancer.

Rosanna Aversa¹, Anna Sorrentino², Roberta Esposito³

¹Institute of Genetics and Biophysics "Adriano Buzzati-Traverso", Consiglio Nazionale delle Ricerche, Via P. Castellino 111, 80131 Naples, Italy. rosanna.aversa@gmail.com.

International Journal of Molecular Sciences

|January 20, 2016

Summary

Researchers discovered 12 new alternative splicing transcripts in breast cancer, including a novel semaphorin 3F isoform. This finding enhances understanding of how splicing impacts breast cancer progression and metastasis.

Keywords:

RNA-Sequencing alternative splicing breast cancer cell adhesion and motility

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Area of Science:

Oncology
Molecular Biology
Genomics

Background:

Breast cancer is a leading cause of cancer death in women, often driven by metastasis.
Tumor invasiveness is linked to altered expression of adhesion molecules, with semaphorins being of particular interest.
Cancer cells can alter alternative splicing to modify adhesion and motility molecules at the isoform level.

Purpose of the Study:

To identify novel alternative splicing transcripts in breast cancer.
To investigate the role of semaphorins and related molecules in breast cancer progression.
To characterize new semaphorin 3F isoforms and their potential functions.

Main Methods:

RNA-Sequencing on MCF-7 breast cancer cells.
Targeted experimental validation in human breast cell lines and tumor biopsies.
In silico analysis of predicted protein structures and functions.

Main Results:

Identified 12 new alternative splicing transcripts in genes encoding adhesion- and motility-related molecules.
Discovered a novel SEMA3F transcript expressed in all tested breast cell lines and biopsies, translating to a new semaphorin 3F isoform.
In silico analysis suggested that new isoforms may have altered or novel functional domains.

Conclusions:

Alternative splicing significantly contributes to the complexity of breast cancer.
The newly identified semaphorin 3F isoform warrants further investigation for its role in breast cancer.
Understanding alternative splicing of adhesion molecules is crucial for insights into breast cancer progression.