The NEXT Five Years – Anastrazole!!! What’s It DO???

From the first moment my wife discovered she had breast cancer, there was a deafening silence from the men I know. Even ones whose wives, mothers or girlfriends had breast cancer seemed to have received a gag order from some Central Cancer Command and did little more than mumble about the experience. Not one to shut up for any known reason, I started this blog…

All right – the mastectomy is done (not OVER, there are still deep emotions attached to that surgery that will never “disappear”). The chemotherapy is done (same thing there: deep emotions and memories that will be carved into my mind forever). While it’s never completely gone, the gut-wrenching worry has passed.

What now?

For the next FIVE years, in addition to some cosmetic surgery, checkups and maintenance, there are more DRUGS. Specific to breast cancer is the one I’ll talk about today: anastrazole.

Chemically, this is called 2,2'-[5-(1H-1,2,4-triazol-1-ylmethyl)-1,3-phenylene]bis(2-methylpropanenitrile) – it’s the picture you see above.

But what’s it DO?

In a nutshell it slows down the production of estrogen in a human body (BTW – men make estrogen, too, just not as much as women do. Women make testosterone, just not as much as men do).

So?

Estrogen, which at puberty initiates the maturation of a woman, causes among other things, the increased growth of the cells in the breast. This estrogen comes from the ovaries and is a totally normal response to a person growing up. Estrogen levels in the blood increase during every menstrual cycle – which means it stimulates the growth of breast cells.

Estrogen doesn’t just stop affecting the woman after puberty. “…life-long exposure to estrogen…plays an important role in determining breast cancer risk…the number of menstrual cycles a woman has, and hence the length of exposure to estrogen during her lifetime, affects her risk for breast cancer.”

So every time a woman has her period, estrogen travels through the blood. The molecule of estrogen affects cells in the body – but only certain kinds of cells like the ones found in the breast and uterus. These cells have “keyholes” in their walls that are called estrogen receptors. The estrogen and the estrogen receptor hook together to make a single molecule that enters the nucleus of the cell. Once it locks on the cell’s DNA, it directs it to do many things. Among the things it tells the cell to do is GROW.

You know by now that cancer happens when cells grow totally out of control. So every time the breast cells get a message from the estrogen, they grow. Breast cancer is the out-of-control growth of breast cells stimulated by estrogen.

Anastrazole BLOCKS estrogen from giving its message to breast (and other) cells. On the website listed below, the author states: “…the medication is directed at preventing recurrence [of cancer] other than just in breast tissue….The American Society of Clinical Oncologists stated recently: ‘To lengthen disease-free survival and lower risk for [cancer] recurrence in nearby tissues or distant tissues…’”

So in a single sentence – anastrazole blocks estrogen from giving its message to cells ANYWHERE IN THE BODY that like to take up estrogen and start growing wildly.

References: http://envirocancer.cornell.edu/factsheet/general/fs9.estrogen.cfm , http://www.medhelp.org/posts/Breast-Cancer/Why-Arimidex-Anastrozole-after-bilateral-mastectomy/show/1314813

Image: http://www.3dchem.com/imagesofmolecules/arimidex.jpg