Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers Find S tem Cell Therapy Effective In Targeting Metastatic Cancer

21.12.2006
Preclinical findings show tumors are attacked, not normal tissue.

Patients with advanced cancer that has spread to many different sites often do not have many treatment options, since they would be unable to tolerate the doses of treatment they would need to kill the tumors.

Researchers at City of Hope and St. Jude Children’s Research Hospital may have found a way to treat cancers that have spread throughout the body more effectively. They used modified neural stem cells to activate and concentrate chemotherapeutic drugs predominately at tumor sites, so that normal tissue surrounding the tumor and throughout the body remain relatively unharmed.

“This approach could significantly improve future treatme nt options for patients with metastatic cancer,” said Karen Aboody, M.D., assistant professor of Hematology/Hematopoietic Cell Transplantation and Neurosciences at City of Hope. “It not only has the potential to destroy residual tumor cells, but it should also improve patients’ quality of life by minimizing toxic side effects such as nausea, diarrhea or bone marrow suppression.”

... more about:
»Cancer »Foundation »metastatic »neuroblastoma

Aboody is the lead investigator of the study done in collaboration with senior investigator Mary Danks, Ph.D., associate member of Molecular Pharmacology at St. Jude Children’s Research Hospital in Memphis, Tenn. The study will be published Dec. 20 in PLoS ONE. A second paper with extended results from the study has been accepted for publication in Cancer Research in January.

Most chemotherapy drugs affect both normal and cancerous tissue, which is why they also are toxic to naturally fast-growing cells in the body such as hair follicles and intestinal cells. Aboody and her colleagues have developed a two-part system to infiltrate metastatic tumor sites, and then activate a chemotherapeutic drug, thereby localizing the drug’s effects to the tumor cells.

The technique takes advantage of the tendency for invasive tumors to attract neural stem cells. The researchers injected modified neural stem/progenitor cells into immunosuppressed mice that had been given neuroblastoma cells, which then formed tumors. After waiting a few days to allow the stem cells to migrate to the tumors, researchers administered a precursor-drug. When it reached the stem cells, the drug interacted with an enzyme the stem cells expressed, and was converted into an active drug that kills surrounding tumor cells. The precursor-drugs were administered for two weeks, then after a two-week break, a second round of stem/progenitor cells and drugs were administered.

One hundred percent of the neuroblastoma mice appe ared healthy and tumor-free at six months. Without treatment, all the neuroblastoma mice died within two-and-a-half months.

The results hold promise for treating solid tumors that metastasize including neuroblastoma, which represents 6 percent to 10 percent of all childhood cancers worldwide, with higher proportions in children under 2 years of age.

“The results are especially important in the case of high-risk neuroblastoma, because treatment-resistant cancer returns in as many as 80 percent of children, and the majority die of their disease,” said co-principal investigator Danks.

Aboody and her colleagues had previously published the efficacy of this technique in primary and metastatic tumors in the brain. This is the first research to demonstrate that it is also effective in a metastatic cancer model, targeting multiple solid tumor sites spread throughout the body. They speculate that the technique could also be applie d to other malignant solid tumors, including colon, brain, prostate and breast cancer, and are planning future preclinical trials using those tumors as well.

The research was funded by grants from the National Cancer Institute, Stop Cancer Foundation, Phi Beta Psi Sorority, the Rosalinde and Arthur Gilbert Foundation, the Neidorf Family Foundation, the Marcus Foundation and ALSAC.

Kathleen O’Neil | alfa
Further information:
http://www.coh.org

Further reports about: Cancer Foundation metastatic neuroblastoma

More articles from Life Sciences:

nachricht A novel socio-ecological approach helps identifying suitable wolf habitats
17.02.2017 | Universität Zürich

nachricht New, ultra-flexible probes form reliable, scar-free integration with the brain
16.02.2017 | University of Texas at Austin

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Switched-on DNA

20.02.2017 | Materials Sciences

Second cause of hidden hearing loss identified

20.02.2017 | Health and Medicine

Prospect for more effective treatment of nerve pain

20.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>