How do anti-cancer drugs work? And how do they affect the cells' cycle??
Answers: Are you asking about chemotherapy? Different chemo drugs work contained by different ways. Some kill cell that replicate rapidly: because compared to most middle-of-the-road cells, cancer cell replicate rapidly. Some chemo drugs choke rotten the blood supply to tumors. Some targeted drugs bind to tumor cells to prevent them from replicating. There are probably more ways they work than that ... did you look on Wikipedia below "chemotherapy"?
I agree with the previous respondent that different chemo drugs work differently. The inestimable majority of older agents (still contained by widespread use) feat against DNA. There are a variety of different ways they deed, but the end result is that the cancer cell recognize that its DNA is abnormal and destroys itself. These drugs work against any hastily dividing cells (the model being that DNA is more actively within use in a hastily dividing cell). This makes sense when you consider that cancer, by definition, is a disease of fast dividing cells. Unfortunately, your body have lots of normal cell that divide rapidly, too, approaching hair, the cell lining your gut, and blood cell. This explains side effects like coat loss, mouth sores, and low blood counts, because even these good cell are destroyed by the chemo.
Newer chemo drugs may be targeted against a specific type of tumor and so, theoretically, is smaller amount toxic to the body's normal cell. The problem is that every type of tumor is so different, and it's nearly impossible to come up with a tricks bullet for each one. Researchers are working knotty in that direction, though.
check out this research group they enjoy a message board you can use http://boinc.bakerlab.org/rosetta/