Navigation Links
2 antibodies are better than 1
Date:2/7/2013

Cancer drugs of the new, molecular generation destroy malignant breast tumors in a targeted manner: They block characteristic molecules on tumor cells - receptors for the hormones estrogen or progesterone, or a co-receptor, called HER2, that binds to many growth factors. But about one in every six breast tumors has none of these receptors. Such cancers, called triple-negative, are particularly aggressive and notoriously difficult to treat.

Some of these therapy-resistant cancers have a potential molecular target for cancer drugs, a growth-factor receptor called EGFR, but an EGFR-blocking drug has proved ineffective in treating them. In a study published recently in the Proceedings of the National Academy of Sciences, Weizmann Institute researchers propose a potential solution: to simultaneously treat triple-negative breast cancer with two EGFR-blocking antibodies instead of one. In a study in mice, the scientists showed that a certain combination of two antibodies indeed prevented the growth and spread of triple-negative tumors. The research team, led by Prof. Yosef Yarden of the Biological Regulation Department and Prof. Michael Sela of the Immunology Department, included Drs. Daniela Ferraro, Nade`ge Gaborit, Ruth Maron, Hadas Cohen-Dvashi, Ziv Porat, Fresia Pareja, and Sara Lavi, Dr. Moshit Lindzen and Nir Ben-Chetrit.

Of the different combinations they tried, the scientists found that the approach worked when the two antibodies bound to different parts of the EGFR molecule. The combined action of the antibodies was stronger than would have been expected by simply adding up the separate effects of each. Apparently, the use of the two antibodies created an entirely new anti-cancer mechanism: In addition to blocking the EGFR and recruiting the help of immune cells, the antibodies probably overwhelmed the EGFR by their sheer weight, causing it to collapse inward from the membrane into the tumor cell.

Deprived of EGFR on its surface, the cells were no longer receiving the growth signals, preventing the growth of the tumor. This approach resembles the natural functioning of the immune system, which tends to block essential antigens at several sites by targeting them with multiple antibodies. If supported by further studies, the two-antibody approach, in combination with chemotherapy, might in the future be developed into an effective treatment for triple-negative breast cancer.


'/>"/>

Contact: Yivsam Azgad
news@weizmann.ac.il
972-893-43856
Weizmann Institute of Science
Source:Eurekalert

Related biology news :

1. Newly discovered breast milk antibodies help neutralize HIV
2. New methods for better purification of wastewater
3. Breakthroughs in Chikungunya research from A*STAR spell new hope for better treatment and protection
4. UNH researchers find African farmers need better climate change data to improve farming practices
5. Giant squids giant eyes: The better to see hungry whales with
6. Improved loblolly pines better for the environment, study finds
7. Fish larvae find the reef by orienting: The earlier the better
8. Intensive kidney dialysis indicates better survival rates than conventional dialysis
9. Modern hybrid corn makes better use of nitrogen, study shows
10. Bigger gorillas better at attracting mates and raising young
11. Better housing conditions for zebrafish could improve research results
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/25/2016)... , Jan. 25, 2016  Glencoe Software, the ... pharma and publication industries, will provide the data management ... Centre (NPSC). ... Phenotypic analysis measures ... whole organisms, allowing comparisons between states such as health ...
(Date:1/21/2016)... India , January 21, 2016 ... According to a new market research report "Emotion Detection ... and Others), Software Tools (Facial Expression, Voice Recognition ... Regions - Global forecast to 2020", published by ... is expected to reach USD 22.65 Billion by ...
(Date:1/20/2016)... Calif. , Jan. 20, 2016  Synaptics ... of human interface solutions, today announced sampling of ... solution for wearables and small screen applications including ... as printers. Supporting round and rectangular shapes, as ... offers excellent performance with moisture on screen, while ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... Calif. , Feb. 11, 2016  Dovetail Genomics™ ... to its beta program for a planned metagenomic genome ... present the company,s metagenomic genome assembly method in a ... in Genome Biology & Technology conference in ... of these highly complex datasets is difficult. Using its ...
(Date:2/11/2016)... 2016   BioInformant announces the February 2016 ... Products, Opportunities, Tools, and Technologies – Market Size, Segments, ... The first and only ... industry, BioInformant has more than a decade of historical ... by stem cell type. This powerful 175 page global ...
(Date:2/11/2016)... MIAMI (PRWEB) , ... February 11, 2016 , ... ... in regenerative medicine, has announced a new agreement with Bankok,Thailand-based Global Stem Cells ... researchers and phsyicians in 15 Latin American countries, including Mexico, Costa Rica, Dominican ...
(Date:2/10/2016)... Febr. 10, 2016 /PRNewswire/ - BioAmber Inc. (NYSE: BIOA ... announce that Mitsui & Co. Ltd., its partner in ... plant, is investing an additional CDN$25 million in the ... stake from 30% to 40%.  Mitsui will also play ... produced in Sarnia , providing dedicated ...
Breaking Biology Technology: