Navigation Links
Lombardi research: Monoclonal antibodies primed to become potent immune weapons against cancer
Date:3/20/2009

Washington, DC - New research suggests that monoclonal antibody therapy of cancer can be improved to be much more powerful than it is today, says a researcher at Georgetown University Medical Center's Lombardi Comprehensive Cancer Center in the March 21 issue of the Lancet.

"We believe that antibody therapy has the capacity to immunize people against cancer," says Louis Weiner, MD, director of the cancer center at GUMC and an internationally recognized expert in development and use of monoclonal antibodies. "Treatment modifications might be able to prolong, amplify, and shape a continuous immune response to cancer cells."

Weiner was asked by Lancet editors to write a review article discussing the newest research in this field. His co-authors are Madhav Dhodapkar, MD, of Yale University and Soldano Ferrone, MD, of the University of Pittsburgh.

Their analysis, based on reviewing the last eight years of research on monoclonal antibody treatment, suggests that a new era in use of these therapies is just around the corner. "Scientists have been able to use new tools to measure effectiveness of these therapies, and have found that antibodies are capable of stimulating the immune system in ways that had not been appreciated to date, and which we can now take advantage of," Weiner says.

Antibodies are immune system proteins that seek out and neutralize molecules they recognize as foreign to a body, such as viruses and bacteria. Monoclonal antibodies are proteins crafted in a laboratory to recognize specific receptors, or antigens, on cancer cells; some antigens promote uncontrolled growth. These antibodies are designed to both attach to cancer receptors to inhibit their function and to alert and activate the immune system to the presence of these receptor proteins.

Monoclonal antibodies already offer effective treatment for a wide range of cancers, including breast cancer (Herceptin, Avastin), colorectal cancer (Erbitux, Avastin), lung cancer (Avastin), and blood cancers (Rituxan, Campath), but they have appeared to primarily work by forcing tumor related receptors to shut down pro-growth signals, Weiner says.

"For years it has been presumed that the ability of antibodies to interfere with malignant cell-related signaling is the dominant mechanism of anticancer activity, but we have also known that the normal job of an antibody is to deliver an antigen to the body's immune system which then destroys the target," Weiner says.

Recent research by Weiner and others, however, now shows that antibodies can inhibit function not only as signaling manipulators but also as initiators of immune responses that leads to control of cancer, the authors say.

"We believe that Herceptin and Rituxan, as examples, work in part by immunizing people against cancer, but at this point, the magnitude of that response is variable and is frequently very small," Weiner says.

Scientists now believe that it will be possible to alter the antibodies so that they induce both kinds of human immunity the innate immune response that is short-lasting and which directly kills tumor cells, and a long-lasting "memory" response that comes from the adaptive immune response. "We have long thought that monoclonal antibodies are capable of stimulating the innate immune system, but we now have evidence that the therapy can prime an adaptive response as well. Such responses would make the treatment much more powerful, capable of keeping cancer under control," he says.

"For the first time we are using technology that can measure the immune response that is occurring in monoclonal antibody treatment, and which will help us build better antibodies that amplify and shape that immune response to become more powerful," Weiner says.

And in the future, it may be possible to build antibodies that are targeted to existing targets on a patient's tumor, as well as to targets that may appear as the cancer mutates. "This one-two punch would anticipate how the tumor changes over time and cut off the cancer's escape route," Weiner says. "These new directions are very exciting."


'/>"/>

Contact: Karen Mallet
km463@georgetown.edu
215-514-9751
Georgetown University Medical Center
Source:Eurekalert

Related biology news :

1. Harmonizing biobank research: An achievable world-wide goal
2. Toothsome research: Deducing the diet of a prehistoric hominid
3. K-State research: Freshwater pollution costs US at least $4.3 billion a year
4. Geisinger research: Antimalarial drug prevents diabetes in arthritis patients
5. Robotics research: Enhancing the lives of people with disabilities
6. Advances in the field of schizophrenia research: New genetic factors identified
7. New research: Fruit juice consumption not related to overweight in children
8. Paradigm shift in Alzheimerss research: new treatments
9. Scientists identify human monoclonal antibodies effective against bird and seasonal flu viruses
10. Scientists identify human monoclonal antibodies effective against bird, seasonal flu viruses
11. Evolution in action: Our antibodies take evolutionary leaps to fight microbes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/2/2016)... LONDON , June 2, 2016 ... has awarded the 44 million US Dollar project, ... Security Embossed Vehicle Plates including Personalization, Enrolment, and IT Infrastructure ... world leader in the production and implementation of Identity Management ... in January, however Decatur was selected ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is ... partnership with VoicePass. By working together, ... experience.  Because VoiceIt and VoicePass take slightly different ... engines increases both security and usability. ... excitement about this new partnership. "This ...
(Date:4/28/2016)... and BANGALORE, India , April 28, 2016 ... a product subsidiary of Infosys (NYSE: INFY ), ... a global partnership that will provide end customers ... mobile banking and payment services.      (Logo: ... innovation area for financial services, but it also plays a ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... June 27, 2016  Global demand for enzymes ... through 2020 to $7.2 billion.  This market includes ... cleaning products, biofuel production, animal feed, and other ... and biocatalysts). Food and beverages will remain the ... increasing consumption of products containing enzymes in developing ...
(Date:6/27/2016)... ... June 27, 2016 , ... Newly created 4Sight ... solutions to the healthcare market. The company's primary focus is on new product ... marketing strategies that are necessary to help companies efficiently bring their products to ...
(Date:6/24/2016)... 2016 Epic Sciences unveiled a liquid ... to PARP inhibitors by targeting homologous recombination deficiency ... new test has already been incorporated into numerous ... types. Over 230 clinical trials are ... including PARP, ATM, ATR, DNA-PK and WEE-1. Drugs ...
(Date:6/23/2016)... Mass. , June 23, 2016   ... development of novel compounds designed to target cancer ... napabucasin, has been granted Orphan Drug Designation from ... the treatment of gastric cancer, including gastroesophageal junction ... stemness inhibitor designed to inhibit cancer stemness pathways ...
Breaking Biology Technology: