Corporate Banner
Satellite Banner
Stem Cells, Cellular Therapy & Biobanking
>
Scientific Community
 
Become a Member | Sign in
Home>News>This Article
  News
Return

Researchers Develop Efficient Model for Generating Human Stem Cells

Published: Wednesday, August 07, 2013
Last Updated: Wednesday, August 07, 2013
Bookmark and Share
Approach has potential to simplify generation of iPSCs for use in human stem cell therapies.

Researchers at the University of California, San Diego School of Medicine report a simple, easily reproducible RNA-based method of generating human induced pluripotent stem cells (iPSCs) in the August 1 edition of Cell Stem Cell. Their approach has broad applicability for the successful production of iPSCs for use in human stem cell studies and eventual cell therapies.

Partially funded by grants from the California Institute for Regenerative Medicine (CIRM) and the National Institutes of Health (NIH), the methods developed by the UC San Diego researchers dramatically improve upon existing DNA-based approaches – avoiding potential integration problems and providing what appears to be a safer and simpler method for future clinical applications.

The generation of human iPSCs has opened the potential for regenerative medicine therapies based on patient-specific, personalized stem cells.  Pluripotent means that these cells have the ability to give rise to any of the body’s cell types.  The human iPSCs are typically artificially derived from a non-pluripotent adult cell, such as a skin cell.  They retain the characteristics of the body’s natural pluripotent stem cells, commonly known as embryonic stem cells.  Because iPSCs are developed from a patient’s own cells, it was first thought that treatment using them would avoid any immunogenic responses.  However, depending on methods used to generate such iPSCs, they may pose significant risks that limit their use.  For example, using viruses to alter the cell’s genome could promote cancer in the host cell.

Methods previously developed to generate integration-free iPSCs were not easily and efficiently reproducible. Therefore, the UC San Diego researchers focused their approach on developing a self-replicating, RNA-based method (one that doesn’t integrate into the DNA) with the ability to be retained and degraded in a controlled fashion, and that would only need to be introduced once into the cell.

Using a Venezuelan equine virus (VEE) with structural proteins deleted, but non-structural proteins still present, the scientists added four reprogramming factors (OCT4, KLF4, SOX2 with either c-MYC or GLIS1). They made a single transfection of the VEE replicative form (RF) RNA into newborn or adult human fibroblasts, connective tissue cells that provide a structural framework for many other tissues.

“This resulted in efficient generation of iPSCs with all the hallmarks of stem cells,” said principal investigator Steven Dowdy, PhD, professor in the UC San Diego Department of Cellular & Molecular Medicine. “The method is highly reproducible, efficient, non-integrative – and it works.”

Dowdy added that it worked on both young and old human cells.  He explained that this is important since – in order to be used therapeutically in fighting disease or to create disease models for research – iPSCs will need to be derived from the cells of middle-aged to old adults who are more prone to the diseases scientists are attempting to treat.   In addition, reprogramming factors can be easily changed.

Additional contributors to the study include lead scientist Naohisa Yoshioka, Edwige Gros, Hai-Ri Li, Shantanu Kumar, Dekker C. Deacon, Cornelia Maron, Alysson R. Muotri, Neil C. Chi, Xiang-Dong Fu, and Benjamin D. Yu, all from the University of California, San Diego.

The study was supported by CIRM, NIH #U01HL107442, the Department of Defense, and the Howard Hughes Medical Institute.


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 3,300+ scientific posters on ePosters
  • More than 4,900+ 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

Body’s Own Gene Editing System Generates Leukemia Stem Cells
Inhibiting the editing enzyme may provide a new therapeutic approach for blood cancers.
Friday, June 10, 2016
Stem Cells Regenerate Damage in Corticospinal Injury
For the first time, researchers show functional benefit in animal model of key motor control system.
Friday, April 01, 2016
Anti-Leukemia Drug May Also Work Against Ovarian Cancer
An antibody therapy already in clinical trials to treat chronic lymphocytic leukemia (CLL) may also prove effective against ovarian cancer – and likely other cancers as well.
Wednesday, November 19, 2014
New Blood: Tracing the Beginnings of Hematopoietic Stem Cells
Researchers uncover earliest clues yet to development of cells that produce all adult blood cells.
Monday, August 18, 2014
New Reprogramming Method Makes Better Stem Cells
Researchers have shown for the first time that stem cells created using different methods produce differing cells.
Friday, July 04, 2014
Biologists Discover Solution to Problem Limiting Development of Human Stem Cell Therapies
An effective strategy that could prevent the human immune system from rejecting the hESCs derived grafts.
Tuesday, January 07, 2014
Scientific News
Genetic Variability in Cell Bank Lots
Researchers working with cancer cells from the same cell bank acquired at the same time, found that the cells were genetically different.
Human Stem Cells to Rapidly Generate Bone, Heart Muscle
A new study shows that combining positive and negative signals can quickly and efficiently steer stem cells down complex developmental pathways to become specialized tissues that could be used in the clinic.
New Therapeutic Targets For Small Cell Lung Cancer Identified
Researchers at UTSW Medical Center have identified a protein termed ASCL1 that is essential to the development of small cell lung cancer.
New Mechanism of Tuberculosis Infection
Researchers have identified a new infection mechanism of tuberculosis that could lead to a new therapeutic angle.
Modelling ALS Requires ‘Aged’ Stem Cells
Research suggests engineered cells are too ‘young’ to accurately model ALS and should be 'aged' to speed progress toward finding potential treatments.
Protein Reinforces Growth of Damaged Muscles
Biologists have found a protein involved in stem cells that bolsters damaged muscle tissue growth - potential for muscle degeneration treatments.
Treating HIV with Cancer-Fighting Gene Shows Promise
A type of gene immunotherapy that has shown promising results against cancer could also be used against HIV.
'Antigen-Presenting Cell' Defends Against Cancer
Through advanced imaging, researchers have identified cells that encourages increases in immune system cancer defences.
Rapid Generation from Stem Cells
Researchers coax human stem cells to rapidly generate bone and heart muscle by directing stem cells down complex developmental pathways.
HIV Hides No Longer
Researchers are working to create proteins that clear HIV-infected cells in order to eliminate latent infection and dormancy.
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
3,300+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,900+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FOR FREE!