Corporate Banner
Satellite Banner
Proteomics
Scientific Community
 
Become a Member | Sign in
Home>News>This Article
  News
Return

MicroRNA Molecule May Serve as Biomarker, Target for Brain Metastases in Breast Cancer Patients

Published: Wednesday, February 06, 2013
Last Updated: Wednesday, February 06, 2013
Bookmark and Share
Currently, most deaths from breast cancer are a result of metastatic disease.

New research shows that cancer stem-like cells — commonly defined as cells within a tumor with the capacity to initiate a new tumor, proliferate rapidly, differentiate and cause chemotherapy resistance — may play a role in breast cancer metastasis.

“Recent research has shown that microRNAs are involved in tumor initiation and progression, and we hypothesized that they also may play a role in metastasis, particularly in relation to cancer stem-like cells,” said Kounosuke Watabe, Ph.D., associate director for basic science at the University of Mississippi Medical Center in Jackson, Miss.

Watabe and colleagues performed microRNA profile analysis on RNA extracted from cancer stem-like cells isolated from a human breast cancer cell line and two highly metastatic variants of this cell line.

“We found that miR-7 is a metastasis suppressor in cancer stem-like cells,” Watabe said. “When we increased expression of miR-7 in cancer stem-like cells from metastatic human breast cancer cell lines, it suppressed their metastatic properties.”

Next, the researchers examined the molecular pathway downstream of miR-7 to find its targets and discovered that miR-7 suppressed expression of KLF4.

“High expression of KLF4 was inversely associated with brain metastasis-free survival but was not associated with bone metastasis,” Watabe said. “This was confirmed in an animal model when we found that expression of miR-7 significantly suppressed the ability of cancer stem-like cells to metastasize to the brain but not the bone.”

Finally, the researchers tested tumor samples from patients with breast cancer whose disease metastasized to the brain. Results showed that miR-7 was downregulated and KLF4 was upregulated. The miR-7/KLF4 axis played a critical role in cancer stem-like cell brain metastasis, according to Watabe.

Few treatments currently exist for brain metastasis because few drugs can penetrate the blood–brain barrier, which prevents chemotherapy from reaching the brain.

“Cancer cells find the brain to be a kind of sanctuary where they can survive longer,” Watabe said. “It is possible that miR-7 and KLF4 may serve as diagnostic or prognostic markers, or therapeutic targets for the prediction of, or treatment of, brain metastasis.”


Further Information

Join For Free

Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 3,900+ scientific posters on ePosters
  • More than 5,300+ scientific videos on LabTube
  • 35 community eNewsletters


Sign In



Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into TechnologyNetworks.com you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

MicroRNA Molecule May Serve as Biomarker
MicroRNA molecule called miR-7 decreased in highly metastatic cancer stem-like cells.
Monday, February 18, 2013
Scientific News
Top 10 Life Science Innovations of 2016
2016 has seen the release of some truly innovative products. To help you digest these developments, The Scientist have listed their top picks for the year.
Largest Resource of Protein-Protein Interactions
Researchers have developed the largest ever database of protein-protein interactions.
Bright Red Fluorescent Protein Created
Scientists have created a bright red, fluorescent protein that could be used to track essential cellular processes.
Protein Self-Regulates Abundance
Researchers have uncovered how a protein, that plays a crucial role in embryonic stem cell renewal, is regulated.
'Lab on the Skin' for Sweat Analysis
Northwestern University researchers develop a low-cost wearable electronic device that collects and analyzes sweat for health monitoring.
Building Better Nanodiscs
Researchers have improved upon the design of nanodiscs that provide an unprecedented view of viral infection.
Breast Cancer Cells Starve for Cystine
Depriving triple negative breast cancer, a treatment-resistant form of breast cancer, of cystine results in cancer cell death.
Novel Urine Test to Predict High-Risk Cervical Cancer
Preliminary studies affirm accuracy and potential cost savings to screen for virus-caused malignancy.
Protein-Folding Gene Helps Heal Wounds
Researchers identified a protein that dramatically accelerates wound healing in animal models.
Crop Yield Gets Boost with Modified Genes
Researchers increase plant proteins that result in more efficient use of sunlight.
Scroll Up
Scroll Down
Skyscraper Banner

SELECTBIO Market Reports
Go to LabTube
Go to eposters
 
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
3,900+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
5,300+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FOR FREE!