Corporate Banner
Satellite Banner
Technology
Networks
Scientific Communities
 
Become a Member | Sign in
Home>News>This Article
  News
Return

Immune-cell Therapy could Improve Melanoma Treatment

Published: Tuesday, March 26, 2013
Last Updated: Tuesday, March 26, 2013
Bookmark and Share
A new study of genetically modified immune cells by scientists from UCLA and the California Institute of Technology could help improve a promising treatment for melanoma, an often fatal form of skin cancer.

The research, which appears March 21 in the advance online edition of the journal Cancer Discovery, was led by James Heath, a member of UCLA's Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research and UCLA's Jonsson Comprehensive Cancer Center. Heath is a professor of molecular and medical pharmacology at UCLA and also holds the Elizabeth W. Gilloon Chair in Chemistry at Caltech.

The melanoma treatment uses T-cells — immune cells that play a major role in fighting infection — taken from patients with melanoma. The cells are then genetically modified in the laboratory so that when they are reintroduced into a patient's bloodstream, they specifically attack melanoma tumors. In early clinical trials, this treatment was shown to shrink tumors dramatically in many patients, but the positive effects were often short-lived.

The UCLA and Caltech researchers found that after the engineered T-cells were returned to patients, their efficacy faded within two to three weeks. Surprisingly, however, once the engineered cells were no longer effective, a new group of non-engineered T-cells arose that had a similar tumor-killing effect that lasted even longer, the scientists discovered.

Using newly developed nanotechnology chips to perform multidimensional and multiplexed immune-monitoring assays, the researchers were able to examine at high resolution single engineered T-cells taken at different times from patients undergoing the therapy, each of whom had a different level of response to the treatment.

"The engineered T cells did not recover their tumor-killing effect," Heath said, "but after one month, another group of T cells appeared that did have tumor-killing effects for another 90 days. Those were not the genetically engineered T-cells, and they appeared to be a byproduct of a process called 'antigen spreading' by the original engineered cells. After 90 days, those cells lost their tumor-killing ability as well."

Antigen spreading is a process by which a T-cell that has been engineered to attack a particular tumor expands its immune response to other T-cells in the body, which then attack the same tumor but are focused on different antigens. (Antigens are substances that trigger a response by the body's immune system.) Scientists may be able to use this process, Heath stressed, to improve T-cell-based treatments for melanoma.

"Our results have led us to possible ways to improve the T-cell therapy to extend its positive effect," Heath said. "We need to incorporate strategies that maintain the functional properties of the engineered T-cells used for therapy. This might include modifying how we grow the T-cells in the laboratory to make their tumor-killing effect last longer or make them resistant to the effects of the patient's T-cells as they recover from pretreatment chemotherapy conditioning and possibly increase the antigen spreading of anti-tumor T-cells."

UCLA professor of medicine Dr. Antoni Ribas was one of Heath's key collaborators on the research.

"One of the possible approaches to resolve the problem identified by this study is to use engineered blood stem cells - instead of the peripheral blood used in the original trials - with this therapy in the hope that the engineered blood stem cells will provide a renewable source of engineered T cells," said Ribas, a member of UCLA's Broad Stem Cell Research Center and Jonsson Cancer Center.

Caltech's Chao Ma, the study's first author, said the findings and the use of the new nanotechnology assay process hold promise for treatments of other disease as well.

"This study points to the value of these single-cell functional analyses for probing the successes and failures of a sophisticated immunotherapy," he said. "I am excited to see its use as a monitoring tool to understand a spectrum of other cellular immunotherapies in the near future."


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 3,100+ scientific posters on ePosters
  • More Than 4,500+ 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

Transcription Factor Isoforms Implicated in Colon Diseases
UC Riverside study explains how distribution of two forms of a transcription factor in the colon influence risk of disease.
Thursday, May 19, 2016
An E.coli Detector May be in Your Hands Soon
Hand-held device that can be used to detect a variety of pathogens—including foodborne pathogens like E. coli—at all stages in the food supply chain, from fields to restaurants may be available soon.
Monday, May 16, 2016
Fructose Alters Hundreds of Brain Genes
UCLA scientists report that diet rich in omega-3 fatty acids can reverse the damage.
Tuesday, April 26, 2016
Study Yields the Key to Effective Personalized Medicine
A team of UCLA bioengineers and surgeons has taken a major step toward making personalized medicine a reality.
Monday, April 11, 2016
Tracking RNA in Live Cells
Technique may open doors to new treatments for many conditions, from cancer to autism.
Friday, March 18, 2016
Cat Stem Cell Therapy Gives Humans Hope
By the time Bob the cat came to the UC Davis veterinary hospital, he had used up most of his nine lives.
Monday, February 08, 2016
Crowdfunding the Fight Against Cancer
From budding social causes to groundbreaking businesses to the next big band, crowdfunding has helped connect countless worthy projects with like-minded people willing to support their efforts, even in small ways. But could crowdfunding help fight cancer?
Monday, February 08, 2016
Toxic Pollutants Found in Fish Across the World's Oceans
Scripps researchers' analysis shows highly variable pollutant concentrations in fish meat.
Friday, January 29, 2016
Key Enzyme in Pierce’s Disease Grapevine Damage Uncovered
UC Davis plant scientists have identified an enzyme that appears to play a key role in the insect-transmitted bacterial infection of grapevines with Pierce’s disease, which annually costs California’s grape and wine industries more than $100 million.
Wednesday, January 13, 2016
Science Magazine Names CRISPR ‘Breakthrough of the Year’
In its year-end issue, the journal Science chose the CRISPR genome-editing technology invented at UC Berkeley 2015’s Breakthrough of the Year.
Monday, December 21, 2015
Genome Sequencing May Save California's Legendary Sugar Pine
The genome of California’s legendary sugar pine, which naturalist John Muir declared to be “king of the conifers” more than a century ago, has been sequenced by a research team led by UC Davis scientists.
Thursday, December 17, 2015
Cellular “ORACLs” to Aid Drug Discovery
New approach for finding therapeutics is inspired by face-recognition software.
Wednesday, December 16, 2015
New Virus Disovered, Linked To Hepatitis C
Study is first to reveal entire genetic makeup of human pegivirus 2.
Tuesday, December 15, 2015
CRISPR-Cas9 Helps Uncover Genetics of Exotic Organisms
A new study illustrates the ease with which CRISPR-Cas9 can knock out genes in exotic animals to learn how those genes control growth and development.
Friday, December 11, 2015
UC Davis Cracks the Walnut Genome
Scientists at the University of California, Davis, have for the first time sequenced the genome of a commercial walnut variety.
Friday, December 11, 2015
Scientific News
The Rise of 3D Cell Culture and in vitro Model Systems for Drug Discovery and Toxicology
An overview of the current technology and the challenges and benefits over 2D cell culture models plus some of the latest advances relating to human health research.
Grant Supports Project To Develop Simple Test To Screen For Cervical Cancer
UCLA Engineering announces funding from Bill and Melinda Gates Foundation.
Injecting New Life into Old Antibiotics
A new fully synthetic way to make a class of antibiotics called macrolides from simple building blocks is set to open up a new front in the fight against antimicrobial drug resistance.
Insight into Bacterial Resilience and Antibiotic Targets
Variant of CRISPR technology paired with computerized imaging reveals essential gene networks in bacteria.
Advancing Protein Visualization
Cryo-EM methods can determine structures of small proteins bound to potential drug candidates.
Alzheimer’s Protein Serves as Natural Antibiotic
Alzheimer's-associated amyloid plaques may be part of natural process to trap microbes, findings suggest new therapeutic strategies.
Slime Mold Reveals Clues to Immune Cells’ Directional Abilities
Study from UC San Diego identifies a protein involved in the directional ability of a slime mold.
How Do You Kill A Malaria Parasite?
Drexel University scientists have discovered an unusual mechanism for how two new antimalarial drugs operate: They give the parasite’s skin a boost in cholesterol, making it unable to traverse the narrow labyrinths of the human bloodstream. The drugs also seem to trick the parasite into reproducing prematurely.
Illuminating Hidden Gene Regulators
New super-resolution technique visualizes important role of short-lived enzyme clusters.
Supressing Intenstinal Analphylaxis in Peanut Allergy
Study from National Jewish Health shows that blockade of histamine receptors suppresses intestinal anaphylaxis in peanut allergy.
Scroll Up
Scroll Down
Skyscraper Banner

Skyscraper Banner
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
3,100+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,500+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FOR FREE!