Related Experiment Video
Updated: Oct 7, 2025

Preparation of Exosomes for siRNA Delivery to Cancer Cells
Published on: December 5, 2018
RNA Exosome Component EXOSC4 Amplified in Multiple Cancer Types Is Required for the Cancer Cell Survival.
Kenzui Taniue1,2, Tanzina Tanu1, Yuki Shimoura1
1Isotope Science Center, The University of Tokyo, Tokyo 113-0032, Japan.
The RNA exosome component EXOSC4 is amplified in many cancers and essential for pancreatic cancer cell survival. Its knockdown affects BIK and SESN2 gene expression, impacting tumor cell viability.
Area of Science:
- Molecular Biology
- Cancer Genomics
- Cellular RNA Metabolism
Background:
- The RNA exosome is a crucial conserved complex for RNA processing and degradation, vital for cellular function.
- Dysregulation of RNA exosome components can contribute to cancer development and progression.
Purpose of the Study:
- To investigate the role of RNA exosome components in cancer using integrated genomic and clinicopathological data.
- To determine the functional significance of EXOSC4 in pancreatic cancer survival and gene regulation.
Main Methods:
- Analysis of The Cancer Genome Atlas (TCGA) PanCancer Atlas data for 27 RNA exosome components across 32 tumor types.
- Genomic and clinicopathological correlation analyses.
- Experimental validation including gene knockdown and mRNA stability assays in pancreatic cancer cells.
Main Results:
- The EXOSC4 gene, encoding an RNA exosome component, is amplified in multiple cancer types.
- EXOSC4 alterations correlate with poor prognosis in pancreatic cancer patients.
- EXOSC4 is essential for pancreatic cancer cell survival, repressing BIK expression and promoting SESN2 mRNA degradation.
Conclusions:
- EXOSC4 plays a significant role in pancreatic cancer progression and cell survival.
- EXOSC4-mediated regulation of BIK and SESN2 contributes to pancreatic tumor cell viability.
- Targeting EXOSC4 may represent a potential therapeutic strategy for pancreatic cancer.
More Related Videos
12:13Sequencing Small Non-coding RNA from Formalin-fixed Tissues and Serum-derived Exosomes from Castration-resistant Prostate Cancer Patients
Published on: November 19, 2019
09:30Using Nanoplasmon-Enhanced Scattering and Low-Magnification Microscope Imaging to Quantify Tumor-Derived Exosomes
Published on: May 24, 2019
Related Concept Videos
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
Adaptive Mechanisms in Cancer Cells
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Cancer Stem Cells and Tumor Maintenance
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Overview of Exosomes
Stahl et al. discovered exosomes in 1983, but the exosomes were initially considered waste products released from the...
Cancers Originate from Somatic Mutations in a Single Cell
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon...