ENCORE #108! – Neulasta – What’s It DO???? (Plus some new thoughts…)

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…That was four years ago – as time passed, people searching for answers stumbled across my blog and checked out what I had to say. The following entry appeared in November of 2011.

Though I talked very briefly some time ago about what the various chemotherapy drugs that my wife was treated with were “for”, I never really went into any kind of detail.

Now that chemo is “over”, I wanted to explore what some of the long-term and lasting effects of the treatment are. Because she reached that time – what with the odd numbing of her upper lip, the incision pains, swollen ankles and dry skin, I’d like to know which of those things is chemo-derived and which ones are not.

So we’ll g0 here next:

What’s “neulasta” and what does it do?

Chemically, “neulasta” is N-(3-hydroxypropyl)methionyl, 1-ether-alpha-methyl-omega-hydroxypoly(oxyethylene). Complex. Lots of chemicals.

But what’s it DO?

“Neulasta”, is a special protein that’s based on sugar (an oligo-saccharide, meaning that the molecule has only a few small units, in this case a sugar ) that’s attached to a protein to form a glycoprotein.

The glycoprotein is a very important part of a cell wall – the cells that are being targeted are white blood cells. The white blood cells are also called neutrophils, granulocytes and stem cells and are the main part of the blood that destroys microscopic body invaders like bacterial infections, viruses or other germs. The glycoproteins help the white blood cells recognize the germs.

Neulasta makes the marrow in bones produce more white blood cells to replace the ones killed by Cytoxan, Adriamycin and Taxotere (which I talked about esrlier) while they are busy killing cancer cells that are growing out of control.

The “colony” in the “colony stimulating factor” is the white blood cells in the bone marrow.

So – “neulasta” is injected just under the skin and gets into the bloodstream. It goes along until it reaches the bone marrow where it forces (also known as “stimulating”) the growth of new white blood cells to take the place of the older ones killed off by the chemicals in chemotherapy.

Side-effects? Sure. Any one of us who’s seen the Red Devil injected in his wife, mother or girlfriend knows what I’m talkin’ about here. With stuff like THAT going into a human body, to expect NO side-effects would be the crazy thing! There are “minor effects” – did any of the researchers experience any of these symptoms? If they had, would they have called the effects “minor”? – of the injection, things like hives; difficulty breathing; swelling (face, lips, tongue, or throat) as well as bone pain; pain in your arms or legs; or bruising, swelling, pain, redness, or a hard lump where the injection was given.

More serious side-effects (though according to the test trials, these rarely happened: sudden or severe pain in your left upper stomach spreading up to your shoulder; severe dizziness, skin rash, or flushing; rapid breathing or feeling short of breath; signs of infection such as fever, chills, sore throat, flu symptoms, easy bruising or bleeding (nosebleeds, bleeding gums), loss of appetite, nausea and vomiting, mouth sores, or unusual weakness.

My wife didn’t seem to experience any of the side-effects. In fact, though we expected WORSE, the chemotherapy (while horrible in its own right) only threw us a few curves. Because of the neulasta injections, she didn’t seem to catch any sort of germ at all and stayed (on the chemotherapy scale of things in our “new normal” world) pretty healthy.

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There are other thoughts I’ve had about the use of neulasta (pegfilgrastim) and I might look at those soon. As for the use of the drug in conjunction with chemotherapy, as with all things produced by the “Big Pharma” industry, the price of an injection of neulasta while remaining roughly the same at roughly $6000, has stimulated (pardon the pun) some competition from a new product, Udenyca. It’s on the market currently and costs less as long as you use a “coupon” (can you “clip coupons” for your cancer treatment now?) reducing the cost of an injection to $4000…from a starting point of $20,651…) This competition MAY be explained by the experimental use of neulasta in treating arthritis…

Hmmm…

For further thought: https://www.sciencedirect.com/topics/neuroscience/pegfilgrastim

Image: https://c2.staticflickr.com/6/5527/10893068965_1d328e8f71_b.jpg