Featured Research

from universities, journals, and other organizations

First proof in patients of an improved 'magic bullet' for cancer detection and radio-therapy

Date:
September 13, 2011
Source:
Salk Institute
Summary:
Oncologists have long sought a powerful "magic bullet" that can find tumors wherever they hide in the body so that they can be imaged and then destroyed.

Oncologists have long sought a powerful "magic bullet" that can find tumors wherever they hide in the body so that they can be imaged and then destroyed. Until recently scientists accepted the notion that such an agent, an agonist, needed to enter and accumulate in the cancerous cells to act. An international research team has now shown in cancer patients that an investigational agent that sticks onto the surface of tumor cells without triggering internalization, an antagonist, may be safer and even more effective than agonists.

One of the Salk Institute's leading researchers, Dr. Jean Rivier, professor in The Clayton Foundation Laboratories for Peptide Biology and holder of the Frederik Paulsen Chair in Neurosciences and his Swiss collaborator, Dr. Jean Claude Reubi, University of Berne and Adjunct Professor at Salk, co-authored a pilot study, published in the September issue of the Journal of Nuclear Medicine, of five patients and demonstrated that their "antagonist," 111In-DOTA-BASS, outperformed the "agonist" agent, OctreoScan, that is widely used in the clinic to image neuroendocrine tumors bearing somatostatin receptors.

"This is the first proof of principle in humans that labeled peptide antagonists can effectively image tumors. Additional research suggests that we could one day use a different radioactive metal to effectively kill the tumors," said Dr. Rivier.

Dr. Reubi, a molecular pathologist, and Dr. Rivier, a chemist, collaborated in the design and selection of natIn-DOTA-BASS for human testing, and Dr. Helmut R. Maecke, a radio chemist, loaded DOTA-BASS with its radioactive marker and tested the compound before use in human. Afterward, the "first in man" study with the radioactive loaded DOTA-BASS was performed at the University Hospital in Freiburgby Drs. Damian Wild, Melpomeni Fani, Martin Behe, Ingo Brink, Helmut R. Maecke, and Wolfgang A. Weber.

The genesis of this study goes back to 1973, when a team of Salk researchers, which included Drs. Brazeau, Vale, Burgus, Rivier, and Roger Guillemin, a 1977 Nobel laureate, isolated and characterized somatostatin, a peptide produced by neuroendocrine glands. The scientists found that the normal function of somatostatin is to block the release of growth hormone throughout the body, which includes inhibiting the release of thyroid-stimulating hormone (TSH) from the thyroid.

Drs. Rivier, Reubi and their colleagues from Germany showed that 111In-DOTA-BASS bound to a greater number of somatostatin receptors on cancer cells than the agonist OctreoScan, and that it did accumulate in normal tissue (liver and kidney) to a lesser extent.

The prototype antagonist therapy has been revamped, and the version studied in the Journal of Nuclear Medicine publication, 111In-DOTA-BASS, detected 25 of 28 metastatic neuroendocrine tumors in the patients, whereas OctreoScan detected only 17.

In-DOTA-BASS has been licensed to a pharmaceutical company for clinical trial development, according to Rivier, who adds that other researchers are exploring an antagonist approach for other G-protein coupled receptors that are abundantly expressed on cancer cells.

The study was funded in part by the Swiss National Science Foundation (JCR).


Story Source:

The above story is based on materials provided by Salk Institute. Note: Materials may be edited for content and length.


Journal Reference:

  1. D. Wild, M. Fani, M. Behe, I. Brink, J. E. F. Rivier, J. C. Reubi, H. R. Maecke, W. A. Weber. First Clinical Evidence That Imaging with Somatostatin Receptor Antagonists Is Feasible. Journal of Nuclear Medicine, 2011; 52 (9): 1412 DOI: 10.2967/jnumed.111.088922

Cite This Page:

Salk Institute. "First proof in patients of an improved 'magic bullet' for cancer detection and radio-therapy." ScienceDaily. ScienceDaily, 13 September 2011. <www.sciencedaily.com/releases/2011/09/110912152909.htm>.
Salk Institute. (2011, September 13). First proof in patients of an improved 'magic bullet' for cancer detection and radio-therapy. ScienceDaily. Retrieved September 17, 2014 from www.sciencedaily.com/releases/2011/09/110912152909.htm
Salk Institute. "First proof in patients of an improved 'magic bullet' for cancer detection and radio-therapy." ScienceDaily. www.sciencedaily.com/releases/2011/09/110912152909.htm (accessed September 17, 2014).

Share This



More Health & Medicine News

Wednesday, September 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

President To Send 3,000 Military Personnel To Fight Ebola

President To Send 3,000 Military Personnel To Fight Ebola

Newsy (Sep. 16, 2014) President Obama is expected to send 3,000 troops to West Africa as part of the effort to contain Ebola's spread. Video provided by Newsy
Powered by NewsLook.com
Obama Orders Military Response to Ebola

Obama Orders Military Response to Ebola

AP (Sep. 16, 2014) Calling the Ebola outbreak in West Africa a potential threat to global security, President Barack Obama is ordering 3,000 U.S. military personnel to the stricken region amid worries that the outbreak is spiraling out of control. (Sept. 16) Video provided by AP
Powered by NewsLook.com
UN: 20,000 Could Be Infected With Ebola by Year End

UN: 20,000 Could Be Infected With Ebola by Year End

AFP (Sep. 16, 2014) Nearly $1.0 billion dollars is needed to fight the Ebola outbreak raging in west Africa, the United Nations say, warning that 20,000 could be infected by year end. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Obama: Ebola Outbreak Threat to Global Security

Obama: Ebola Outbreak Threat to Global Security

AP (Sep. 16, 2014) President Obama is ordering U.S. military personnel to West Africa to deal with the Ebola outbreak, which is he calls a potential threat to global security. (Sept. 16) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

    Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins