Targeted Therapies To Lead New Wave O...

Targeted Therapies To Lead New Wave Of Breast Cancer Treatments

There are 2 comments on the Medical News Today story from Jul 3, 2008, titled Targeted Therapies To Lead New Wave Of Breast Cancer Treatments. In it, Medical News Today reports that:

Main Category: Breast Cancer Also Included In: Cancer / Oncology Article Date: 03 Jul 2008 - 4:00 PDT Rising public awareness about breast cancer and the treatments available has greatly improved revenues in ...

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Since: Dec 05

Irvington, NJ

#1 Jul 3, 2008
I think that functional, cell-based tests would be vastly more informative than virtually all drugs than marker-based tests, including multi-gene tests.

Functional profiling assays can include anti-vascular drugs, such as Avastin, Sutent, Nexavar, Tarceva, Iressa, Tykerb, both as single agents and in combination with each other and with traditional cytotoxic agents and hormonal therapies.

It can provide more valuable information today than will be provided with marker and genomic based assays 10 years from now. It can simultaneously test for direct anti-tumor activity and for antivascular activity against the microvascular present within the three dimensional tumor cell clusters.

There has been unique cell culture research a new bio-marker assay for microvascular viability to identify potential responders to Avastin, Nexavar, Sutent, and other anti-angiogenic drugs by targeting not the cells themselves, but rather VEFG secreted by tumor cells, and to assess previously unanticipated direct and potentiating anti-angiogenic effects of targeted therapy drugs such as Tarceva and Iressa.

Prior to this development, it was thought that the lack of an intact tumor micro-vasculature would prevent in vitro drug studies in disaggregated tissues. However, it was discovered that endothelial cells are present in tumor microclusters and it appears that drug effect upon these cells can be assessed in this microvascular assay.

It is the only assay which involves direct visualization of the cancer cells at endpoint, allowing for accurate assessment of drug activity, discriminating tumor from non-tumor cells, and providing a permanent archival record, which improves quality, serves as control, and assesses dose response in vitro.

Photomicrographs in the assay can show that some clones of tumor cells don't accumulate the drug. These cells won't get killed by it. The assay measures the net effect of everything which goes on (Functional Tumor Cell Profiling). Are the cells ultimately killed, or aren't they?

I too believe that the short term future of cancer therapeutics is combinations of "targeted" agents, not only for breast cancer treatments, but for all solid cancers.
#2 Sep 23, 2013
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