Thursday, July 17, 2014

As Taken from the "Medical Press" which posted on 6/24/14

Virus kills triple negative breast cancer cells, tumor cells in mice 6/24/14

"A virus not known to cause disease kills triple-negative breast cancer cells and killed tumors grown from these cells in mice, according to Penn State College of Medicine researchers. Understanding how the virus kills cancer may lead to new treatments for breast cancer.
Adeno-associated virus type 2 (AAV2) infects humans but is not known to cause sickness. In prior studies, the researchers tested the virus on a variety of breast cancers that represent degrees of aggressiveness and on human papillomavirus-positive cervical cancer cells. The virus initiated apoptosis—natural cell death—in cancer cells without affecting .
"Treatment of breast cancer remains difficult because there are multiple signaling pathways that promote tumor growth and develop resistance to treatment," said Craig Meyers, Ph.D., Distinguished Professor of Microbiology and Immunology.
Signaling pathways involve molecules in a cell that control cell functions—such as cell division—by cooperation. For example, the first molecule in the process receives a signal to begin. It then tells another molecule to work, and so on.
Treatment of breast cancer differs by patient due to differences in tumors. Some tumors contain protein receptors that are activated by the hormones estrogen or progesterone. Others respond to another protein called human epidermal growth factor receptor 2, or HER2. Each of these is treated differently.
A does not have any of these protein receptors and is typically aggressive.
"There is an urgent and ongoing need for the development of novel therapies which efficiently target triple-negative breast cancers," Meyers said.
In the current study, the researchers tested AAV2 on a cell-line representative of triple-negative breast cancer. The researchers report their results in Cancer Biology & Therapy.
The AAV2 killed 100 percent of the cells in the laboratory by activating proteins called caspases, which are essential for the cell's natural death. In addition, consistent with past studies, AAV2-infected cancer cells produced more Ki-67, an immunity system activating protein and c-Myc, a protein that helps both to increase cell growth and induce apoptosis. The cancer cell growth slowed by day 17 and all cells were dead by day 21. AAV2 mediated cell killing of multiple breast cancer cell lines representing both low and high grades of cancer and targeted the independent of hormone or growth factor classification.
The researchers then injected AAV2 into human cell line-derived tumors in without functioning immune systems. Mice that received AAV2 outlived the untreated mice and did not show signs of being sick, unlike the untreated mice. Tumor sizes decreased in the treated mice, areas of cell death were visible and all AAV2 treated mice survived through the study, a direct contrast to the untreated mice.
"These results are significant, since tumor necrosis—or death—in response to therapy is also used as the measure of an effective chemotherapeutic," Meyers said.   Future studies should look at the use of AAV2 body-wide in mice, which would better model what happens in humans, according to Meyers."

Well, fellow TNBCers - this is promising news!  Let's continue to hang in there and keep the faith.  They are continuing to do the research in hopes of helping us and this is looking good!

1 comment:

  1. Cured of TNBC!
    I want to take this time out as a cancer survivor to encourage women out there still suffering from this with my story on how i got a cure. The sad news about it is that i was diagnosed on my 36th birthday in 2008 and with stage 3 TNBC which after i made research was a very aggressive form of cancer at that point i decided and told myself i was going to die and that the end has finally come. All my life i never thought of having breast cancer because i was very active and i worked out at the gym several times every week and my diet was okay. In my search for a cure after 6 years of diagnosis and even after chemo which i did twice spending thousands of dollars but to no avail, until a church member told me all about Dr Aleta a herbal doctor that specializes in treating TNBC, who could help me with a permanent cure, i doubted this at first but i later gave it a try following her methods and instructions. It took 3 months and after it all i felt normal but still went for diagnosis and i was clean today i am proud to say i am a cancer survivor no nodes and i am totally free the new diagnosis confirmed it. Do not die in silence or ignorance reach her on don't be shy just speak to her today.