Thursday, February 9, 2012

Immune System and Cancer


The immune system relies on an intricate network of alarm bells, targets and safety brakes to determine when and what to attack. The new results suggest that scientists may now be able to combine DNA sequencing data with their knowledge of the triggers and targets that set off immune alarms to more precisely develop vaccines and other immunotherapies for cancer. Scientists have long maintained that the immune system can recognize cancer as a threat either on its own or with the help of vaccines or other immunotherapeutic treatments, which help alert the immune system to the danger posed by cancers. Once the cancer is recognized, the immune system should develop the capacity to attack growing cancer cells until either the tumor is eradicated or the immune system's resources are exhausted. Cancer immunoediting, suggests that some of the mutations in tumor cells are very easy for the immune system to recognize as a threat. If the immune system detects these mutations in cancer cells, it attacks until they are destroyed. At that point, the cancer may be eliminated. But it's also possible that the cancer can be "edited" by the immune system, resulting in the removal of all the cells containing the critical easily recognized mutations. The remaining tumor cells can continue to grow or enter into a period of dormancy where they are not destroyed but are held in check by the immune system. By comparing genetic data from cancer cells and normal cells, scientists identified 3,743 mutations in the genes of the tumor cells.
Our best choice and suggestion from researchers is that we create a vaccine that can help the immune system to recognize and attach some of the mutated proteins in a cancer.


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