Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Gene therapy may increase cancer cure rates, medical physicists show

14.08.2002


An innovative combination of two medical procedures-gene therapy and radiation therapy--can increase cancer cure rates by significant amounts compared to the cure rates offered by conventional radiation therapy alone, a Virginia Commonwealth University (VCU) team has concluded. The researchers presented their results last month in Montreal at the annual conference of the American Association of Physicists in Medicine.



Known as genetic radiotherapy, the combined treatment can potentially increase cancer cure rates by up to 70% over present therapies that exclusively use radiation therapy, the researchers say. The combined technique is currently evolving from laboratory studies to human clinical trials.

In genetic radiotherapy, cancer cells are infected with a virus that makes tumor cells more sensitive to--and more easily destroyed by--radiation such as x-rays. At last month’s medical physics meeting, the VCU researchers presented a quantitative model predicting the increase in cancer cure rates with genetic radiotherapy.


"Our model incorporates human patient data from large radiotherapy clinical trials as well as experimental genetic therapy data from laboratory work," says Dr. Paul Keall, an assistant professor in VCU’s radiation oncology department.

To calculate the projected cure rates, the group considers the fraction of tumor cells that are genetically modified, or "transduced," by the injected virus. They also consider the sensitivity of the genetically transformed cells to radiation.

With present laboratory technology, the researchers predict an increase in cure rate of 15% when genetic radiotherapy is used instead of conventional radiation treatments on non-genetically-altered cancer cells. Exploring an ideal situation in which all of the cancer cells are genetically modified, they find the technique can theoretically increase the cancer cure rate by as much as 70%. In their model, a "cure" means a lack of tumor recurrence at the site where the tumor was treated.

"Thus, our results indicate that genetic radiotherapy has the potential to significantly improve cancer cure rates compared to current radiotherapy practices," says Keall. "Needed now are carefully controlled studies to test our predictions."


###
Meeting paper: "Radiobiological Predictions for Genetically Radiosensitized Tumors," by Paul Keall, PhD Guido Lammering, MD, Theodore Chung, MD, and Rupert Schmidt-Ullrich, MD, all at Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, USA, paper MO-E-517B-7, Monday, July 15, 2002, 44th Annual AAPM Meeting, Montreal, Quebec.

Ben Stein | EurekAlert!
Further information:
http://www.aip.org/

More articles from Health and Medicine:

nachricht New malaria analysis method reveals disease severity in minutes
14.08.2017 | University of British Columbia

nachricht New type of blood cells work as indicators of autoimmunity
14.08.2017 | Instituto de Medicina Molecular

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Gold shines through properties of nano biosensors

17.08.2017 | Physics and Astronomy

Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter

17.08.2017 | Earth Sciences

Mars 2020 mission to use smart methods to seek signs of past life

17.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>