NaturalNews | January 29 2013
Vitamin D supplementation may be able to slow or even halt the progression of the most dangerous variety of breast cancer, according to a study conducted by researchers from Saint Louis University and IRBLleida, Spain, and published in The Journal of Cell Biology. In addition, the researchers isolated biomarkers that could help physicians identify women that could benefit from vitamin D treatment.
The researchers came to this discovery by identifying, for the first time, one of the molecular pathways that leads to the variety of breast cancer known as triple-negative. This cancer is more likely to affect younger women, and is most resistant to treatment.
Scientists have known for some time that a malfunction of a tumor-suppressing gene known as BRCA1 can lead to the development of breast cancer. This gene is part of the cellular defense system by which the body ensures that any damaged DNA is not passed on to new cells, using mechanisms such as screening DNA for errors and sending cells carrying damaged DNA into hibernation or even programmed cell death. This is an important cancer-preventive role, because an accumulation of DNA damage can lead a cell to the out-of-control replication associated with cancerous tumors.
BRCA1 plays a role in screening DNA and repairing double-strand breaks, a particularly dangerous form of damage. It also plays a role in verifying that DNA has been replicated and transferred properly to new cells. When BRCA1 fails, it may lead to the development of breast cancer, and often the particular variety that is negative for receptors of two hormones and a protein: estrogen, progesterone and HER2. Because such tumors are not dependent on these external factors for growth, they are harder to “starve” and kill.
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