Navigation Links
Tiny gems take big step toward battling cancer
Date:3/9/2011

Chemotherapy drug resistance contributes to treatment failure in more than 90 percent of metastatic cancers. Overcoming this hurdle would significantly improve cancer survival rates.

Dean Ho, an associate professor of biomedical engineering and mechanical engineering at Northwestern University, believes a tiny carbon particle called a nanodiamond may offer an effective drug delivery solution for hard-to-treat cancers.

In studies of liver and breast cancer models in vivo, Ho and a multidisciplinary team of scientists, engineers and clinicians found that a normally lethal amount of a chemotherapy drug when bound to nanodiamonds significantly reduced the size of tumors in mice. Survival rates also increased and no toxic effects on tissues and organs were observed.

This is the first work to demonstrate the significance and translational potential of nanodiamonds in the treatment of chemotherapy-resistant cancers. The results will be published March 9 in the journal Science Translational Medicine.

"Our results show the nanodiamond's enormous translational potential towards significantly improving the efficacy of drug-resistant cancer treatment and simultaneously improving safety," said Ho, who led the research and is corresponding author of the paper. "These are critical benefits. We chose to study these chemo-resistant cancers because they remain one of the biggest barriers to treating cancer and improving patient survival."

Ho is with Northwestern's McCormick School of Engineering and Applied Science and is a member of the Robert H. Lurie Comprehensive Cancer Center of Northwestern University.

Nanodiamonds are carbon-based materials approximately 2 to 8 nanometers in diameter. Each nanodiamond's surface possesses functional groups that allow a wide spectrum of compounds to be attached to it, including chemotherapy agents.

The researchers took these nanodiamonds and reversibly bound the common chemotherapy drug doxorubicin to them using a scalable synthesis process, which enhances sustained drug release.

Ho and his colleagues studied mouse models with liver and breast cancers. In these resistant cancers, drugs are able to get inside the tumors but are kicked right back out because of an innate response in the liver and breast to expel these drugs.

They treated one group of animals with the doxorubicin-nanodiamond complexes and another group with the drug alone. In those treated with the nanodiamond complexes, the chemotherapeutic remained in circulation longer -- up to 10 times longer -- than those treated with the drug alone. In addition, the drug itself was retained within both types of tumors for a significantly longer period of time. Such a high retention rate means a smaller amount of the very toxic drug would need to be administered, thus reducing side effects.

The researchers also found that the drug-nanodiamond complexes had no negative effect on the white blood cell count. This is especially important for cancer treatment: if the white blood cell count drops below a certain level, treatment is stopped due to the risk of major complications.

"Nanodiamonds have excellent biocompatibility, and the process of formulating nanodiamond-drug complexes is very inexpensive," said Edward K. Chow, a postdoctoral fellow with the G.W. Hooper Foundation and the University of California, San Francisco, and first author of the paper. "Nanodiamonds possess numerous hallmarks of an ideal drug delivery system and are promising platforms for advancing cancer therapy."


'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Related medicine news :

1. Top scientists unite to develop global scientific strategy Towards An HIV Cure
2. Toward a fast, simple test for detecting cholera rampaging in 40 countries
3. Major step taken toward an open and shared digital brain atlasing framework
4. Warning about benevolent sexism and mens apparently positive attitudes towards women
5. Early Steps Toward an Alzheimers Blood Test
6. Protein disables p53, drives breast cells toward cancer transition
7. University of Utah and Harvard researchers take major step toward first biological test for autism
8. European partnership funds research toward robot aides for the elderly
9. MIT moves toward greener chemistry
10. Study shows behaviors and attitudes towards oral sex are changing
11. Toward safer plastics that lock in potentially harmful plasticizers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/12/2017)... ... 2017 , ... First Healthcare Compliance (FHC), an industry leader ... range of technology and learning solutions at the 68th Annual American Healthcare Association ... held October 14–18, 2017 at the Mandalay Bay Resort in Las Vegas, Nevada. ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... the demand of today’s consumer and regulatory authorities worldwide. From Children’s to Adults ... tested to meet the highest standard. , These products are also: Gluten ...
(Date:10/12/2017)... ... October 12, 2017 , ... Asante, a nationally recognized ... have expanded their existing home health joint venture through an agreement, effective October ... a joint venture home health company with Asante, delivering clinically integrated care, for ...
(Date:10/12/2017)... Malvern, PA (PRWEB) , ... October 12, 2017 , ... ... is the recipient of a 2017 Folio Magazine Eddie Digital Award for ‘Best ... New York City on October 11, 2017. , The annual award competition recognizes editorial ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... ... been named one of Michigan’s 2017 Best and Brightest in Wellness® by Best ... in Wellness® awards program on Friday, Oct. 20 from 7:30 a.m. to 2 ...
Breaking Medicine News(10 mins):
(Date:10/4/2017)... 4, 2017 OBP Medical , ... medical devices, today announced regulatory approval from ... (or Agência Nacional de Vigilância Sanitária (ANVISA)) to ... surgical retractor with integrated LED light source and ... and exposure of a tissue pocket or cavity ...
(Date:10/2/2017)... The Rebound mobile app is poised to become ... tide of prescription drug addiction. The app empowers users to ... stepping down their dosage in a safe, controlled manner while ... the first 100,000 people to sign up will enjoy 3 ... ...
(Date:9/25/2017)... Sept. 25, 2017   Montrium , an ... solutions, today—from the IQPC Trial Master Files & ... NL)—announced that EastHORN Clinical Services has selected ... and TMF management. EastHORN, a leading European contract ... to increase transparency to enable greater collaboration with ...
Breaking Medicine Technology: