Navigation Links
'Smart bomb' nanoparticle strategy impacts metastasis
Date:7/7/2008

A new treatment strategy using molecular "smart bombs" to target metastasis with anti-cancer drugs leads to good results using significantly lower doses of toxic chemotherapy, with less collateral damage to surrounding tissue, according to a collaborative team of researchers at the University of California, San Diego. By designing a "nanoparticle" drug delivery system, the UC San Diego team, led by Moores UCSD Cancer Center Director of Translational Research David Cheresh, Ph.D., has identified a way to target chemotherapy to achieve a profound impact on metastasis in pancreatic and kidney cancer in mice.

In a study to be published online the week of July 7 in advance of publication in the Proceedings of the National Academy of Sciences (PNAS), Cheresh, professor and vice chair of pathology, and members of his team report that the nanoparticle carrying a payload of chemotherapy homes in on a protein marker called integrin ανβ3 found on the surface of certain tumor blood vessels where it is associated with development of new blood vessels and malignant tumor growth.

The team found that the nanoparticle/drug combination didn't have much impact on primary tumors, but stopped pancreatic and kidney cancers from metastasizing throughout the bodies of mice. They showed that a greatly reduced dosage of chemotherapy can achieve the desired effect because the drug selectively targets the specific blood vessels that feed the cancerous lesion and kills the lesion without destroying surrounding tissue. The destruction of healthy tissue is a side-effect when chemotherapy is administered systemically, flooding the body with cancer-killing toxins.

"We were able to establish the desired anti-cancer effect while delivering the drug at levels 15 times below what is needed when the drug is used systemically," said Cheresh. "Even more interesting is that the metastatic lesions were more sensitive to this therapy than the primary tumor."

The study is an example of an initiative that joins researchers from UC San Diego's Health Sciences and the Jacobs School of Engineering to improve health care through innovative technologies. Engineers and oncologists working together designed a nanoparticle a microscopic-sized particle of 100 nanometers, made of various lipid-based polymers which delivers the cancer cell-killing drug doxorubicin to the network of blood vessels supporting the tumor that express the ανβ3 protein.

"Doxorubicin is known to be an effective anti-cancer drug, but has been difficult to give patients an adequate dose without negative side effects," Cheresh said. "This new strategy represents the first time we've seen such an impact on metastatic growth, and it was accomplished without the collateral damage of weight loss or other outward signs of toxicity in the patient."

Cancer metastasis is traditionally much more difficult to treat than the primary tumor, and is what usually leads to the patient's death. Because metastasis is more reliant on new blood vessel growth, or angiogenesis, than established tumors are, Cheresh theorized that targeting the anti-cancer drug to the sites of new blood vessel growth has a preferential effect on metastatic lesions.

"Traditional cancer therapies are often limited, or non-effective over time because the toxic side effects limit the dose we can safely deliver to the patient," said Cheresh. "This new drug delivery system offers an important advance in treating metastatic disease."


'/>"/>

Contact: Debra Kain
ddkain@ucsd.edu
619-543-6163
University of California - San Diego
Source:Eurekalert

Related medicine news :

1. New Smart Technology Makes Patient Data Collection Easier, More Efficient
2. New Survey Shows Americans are Still Concerned About Food Safety, Yet Still Not Smart About What They Like to Eat
3. Delta Dental of Illinois Introduces Smile Smart For Your Health
4. Toddler Study Proves Humans Outsmart Apes
5. SMART Association Becomes Healthcare Council Member of Smart Card Alliance
6. Smart insulin nanostructures pass feasibility test, UT study reports
7. New Oral-B(R) Triumph(TM) With SmartGuide(TM) is the First Power Toothbrush With a Wireless Display
8. Pasta Gets Smarter - and Healthier
9. Healthy Living Made Easy with New Diabetes Foodsmart e-Newsletter
10. Oridion Introduces New Smart Capnography System for Improved Patient Safety
11. SafeSmart, Inc. Presents SafetyTies to Sixth Annual MedAssets Technology Forum
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2017)... ... 2017 , ... Vighter established its NAEMT Authorized Training Center ... Trauma Life Support (PHTLS) course scholarships to four medics assigned to the Minnesota ... cooperation with the American College of Surgeons to promote critical thinking in addressing ...
(Date:3/24/2017)... , ... March 24, 2017 , ... According to a ... is invalid because it does not obey the rules Congress has directed the CBO ... jobs, which the GOP reform would restore. Yet, it estimates a reduction in employer-based ...
(Date:3/24/2017)... ... 24, 2017 , ... In just two days, Aqua Design ... garden on Kickstarter . Surpassing the $100,000 milestone so quickly,10-times the original ... (and counting) already backing the campaign. , “We are very grateful for ...
(Date:3/24/2017)... (PRWEB) , ... March 24, 2017 , ... Viewers who ... variety of critical historical facts, cultural practices, goods, services, and societal issues tend to ... will look into the popular practice of utilizing running events for causes around the ...
(Date:3/24/2017)... ... March 24, 2017 , ... “End Time GPS”: ... events will interrelate. “End Time GPS” is the creation of published author, Wesley ... while working on military munitions and space-vehicle projects. Now, at age ninety-one, he shares ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... , Mar. 23, 2017 Research and Markets ... Market: Analysis By Procedure, Replacement Procedure By Technique, Repair Procedure By ... ... Valve Devices Market is forecasted to grow at a CAGR of ... devices is driven by rising aging population, growth in population with ...
(Date:3/23/2017)... March 23, 2017 ... created through extensive primary research (inputs from industry ... aims to present the analysis of global heart ... (Replacement and Repair); Replacement Procedure By Technique (Mechanical, ... Technique (Surgical Devices, Balloon Valvuloplasty, Transcatheter Mitral Valve ...
(Date:3/23/2017)... 23, 2017 As a result of ... the prevalence of allergic diseases, cutting edge developments ... revolutionising the ways in which pharmaceutical and biotech ... promises to be both a high quality meeting ... interest groups, immunologists, research scholars and doctors. The ...
Breaking Medicine Technology: