Featured Research

from universities, journals, and other organizations

New way to test cancer drugs

Date:
March 16, 2011
Source:
Purdue University
Summary:
A scientist's nanopolymer would make it easier and cheaper for drug developers to test the effectiveness of a widely used class of cancer inhibitors. He created the 'pIMAGO nanopolymer' that can be used to determine whether cancer drugs have been effective against biochemical processes that can lead to cancer cell formation.

W. Andy Tao uses nanopolymers and chemical reactions that cause color changes in a solution to detect activity related to cancer cell formation.
Credit: Purdue Agricultural Communication photo/Tom Campbell

A Purdue University scientist's nanopolymer would make it easier and cheaper for drug developers to test the effectiveness of a widely used class of cancer inhibitors.

W. Andy Tao, an associate professor of biochemistry analytical chemistry and a member of the Purdue Center for Cancer Research team, created the Purdue-patented pIMAGO nanopolymer that can be used to determine whether cancer drugs have been effective against biochemical processes that can lead to cancer cell formation. The nanopolymers would attach themselves to target proteins that would later be detected by a relatively simple laboratory procedure called chemiluminescence.

Tymora Analytical, a company Tao started in the Purdue Research Park, will manufacture the pIMAGO nanopolymers. The 'p' stands for phosphor, and the IMAGO comes from the Greek word for image.

Tao's pIMAGO nanopolymers are coated in titanium ions and would attract and bond with phosphorylated proteins, ones in which a phosphate group has been added to a protein activating an enzyme called kinase. Kinase, when overactive, is known to cause cancer cell formation, and many cancer drugs are aimed at inhibiting kinase activity.

"It is universal. You can detect any kind of phosphorylation in a protein," said Tao, whose findings were reported in the early online version of the journal Analytical Chemistry. "It is also cheaper and would be more widely available."

The nanopolymers would be added to a solution of proteins, a chemical agent to start phosphorylation and a drug to inhibit kinase activity. Phosphorylated proteins would only be present if the drug is ineffective.

Avidin-HRP -- the protein Avidin bound with the enzyme horseradish peroxidase -- would be added. Avidin would bind with a vitamin B acid called biotin that is also on the nanopolymers' surfaces. A chemical called a substrate, added later, would cause a reaction with HRP, causing the solution to change color.

A lightly colored solution would mean there had been little kinase activity and few phosphorylated proteins and that the drug was effective. A darker solution would signal more kinase activity and a less effective drug.

"This could have a lot of applications in pharmaceuticals for drug discovery," Tao said.

Screening kinase inhibitors using antibodies can be cost-prohibitive for many laboratories because antibodies are in short supply and aren't available for many types of cells. Radioisotope tests are highly regulated and possibly dangerous because of radiation involved.

"We want to develop this as a commercial application to replace radioisotopes and antibodies as a universal method for screening kinase inhibitors," Tao said.

The National Science Foundation and the National Institutes of Health funded the research.


Story Source:

The above story is based on materials provided by Purdue University. The original article was written by Brian Wallheimer. Note: Materials may be edited for content and length.


Journal Reference:

  1. Anton Iliuk, Juan S. Martinez, Mark C. Hall, W. Andy Tao. Phosphorylation Assay Based on Multifunctionalized Soluble Nanopolymer. Analytical Chemistry, 2011; 110311102308028 DOI: 10.1021/ac2000708

Cite This Page:

Purdue University. "New way to test cancer drugs." ScienceDaily. ScienceDaily, 16 March 2011. <www.sciencedaily.com/releases/2011/03/110316122516.htm>.
Purdue University. (2011, March 16). New way to test cancer drugs. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2011/03/110316122516.htm
Purdue University. "New way to test cancer drugs." ScienceDaily. www.sciencedaily.com/releases/2011/03/110316122516.htm (accessed October 21, 2014).

Share This



More Health & Medicine News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

CDC Revamps Ebola Guidelines After Criticism

CDC Revamps Ebola Guidelines After Criticism

Newsy (Oct. 21, 2014) The Centers for Disease Control and Prevention have issued new protocols for healthcare workers interacting with Ebola patients. Video provided by Newsy
Powered by NewsLook.com
WHO: Ebola Vaccine Trials to Start a in January

WHO: Ebola Vaccine Trials to Start a in January

AP (Oct. 21, 2014) Tens of thousands of doses of experimental Ebola vaccines could be available for "real-world" testing in West Africa as soon as January as long as they are deemed safe in soon to start trials, the World Health Organization said Tuesday. (Oct. 21) Video provided by AP
Powered by NewsLook.com
First-Of-Its-Kind Treatment Gives Man Ability To Walk Again

First-Of-Its-Kind Treatment Gives Man Ability To Walk Again

Newsy (Oct. 21, 2014) A medical team has for the first time given a man the ability to walk again after transplanting cells from his brain onto his severed spinal cord. Video provided by Newsy
Powered by NewsLook.com
CDC Issues New Ebola Guidelines for Health Workers

CDC Issues New Ebola Guidelines for Health Workers

Reuters - US Online Video (Oct. 21, 2014) The U.S. Centers for Disease Control and Prevention has set up new guidelines for health workers taking care of patients infected with Ebola. Linda So reports. Video provided by Reuters
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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