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VIB-K.U. Leuven scientists clear the way to alternative anti-angiogenic cancer therapy
Date:1/7/2011

Leuven Scientists attached to VIB and K.U.Leuven have succeeded in decoding a potential new anti-cancer mechanism. The researchers discovered that normalizing abnormal tumor blood vessels through HRG (histidine-rich glycoprotein) prevents metastasis of tumor cells and enhances chemotherapy efficiency. In tumors, vessels formation is disturbed, leading to inefficient delivery of chemotherapeutic drugs and allowing cancer cells to escape to other parts of the body (metastasis). The normalization of tumor blood vessel formation through HRG works by repressing the production of the Placental Growth Factor PlGF. Anti-PlGF therapy is now being tested as a new agent against cancer by ThromboGenics in collaboration with Roche. The recently discovered mechanism offers alternative possibilities for cancer treatment.

Cancer and the formation of blood vessels (angiogenesis)

Every growing tissue is supplied with oxygen and nutrients through our blood vessels. However, tumors grow much faster than normal tissue and have a higher need for nutrients. Consequently, tumor cells start generating growth factors to stimulate the growth of new blood vessels. However, the resulting blood vessels are of abnormal shape, causing poor blood flow and little oxygen supply to the cancer cells. The oxygen shortage encourages cancer metastasis and eventually leads to a malignant cancer. Furthermore, the abnormal shape of the blood vessels hampers the supply and efficiency of anti-cancer drugs.

Conventional anti-angiogenic therapy

Conventional anti-angiogenic cancer therapy in which a growth factor is eliminated may aggravate tumor metastasis, becase. Because of this, there has in recent years been a greater focus on anti-angiogenic therapies which normalize the blood vessels supplying the tumor. This would reduce the oxygen shortage, with the result that the cancer cells will tend to travel less to other parts of the body and anti-cancer dr
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Contact: Joris Gansemans
joris.gansemans@vib.be
32-924-46611
VIB (the Flanders Institute for Biotechnology)
Source:Eurekalert

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