Deanna, look what you made me do....
At my initial PC diagnosis I was told by my Onco that ADT was my only option given my stats. When I asked him how long ADT would work, he said there was no way to tell, which is true. However, like you, I wanted some idea of its possible duration and found many studies conducted on the subject and have shared them here in different posts.
For some reason, when I started Taxotere (docetaxel), I did not do a similar search on the topic, maybe it was because I'm combining Taxotere with XL-184 and felt any studies on Taxotere alone would not be pertinent. I read your post the day before heading to NIH for my 9th Taxotere cycle and while there I had time to peruse the internet on the subject and found some interesting studies.
Some of these studies are of a fairly small cohort, so it's difficult to say how relative they are AND as everyone else says, we are all different and none of these studies will predict an individuals response to a treatment. I still prefer having something to compare my results with.
Here is an article that assessed the Time-To-Nadir (TTN) after starting Docetaxel and what it might mean for duration.
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TTN on Docetaxel My PSA yesterday went up to 6.4 from 6.0, so I'm saying I reached my Nadir on 9/30. Since I started chemo on 4/30, I reached Nadir in approx. 22weeks. If I'm interpreting the article correctly, since Nadir was reached in >16weeks, I might get 37.5 weeks vs 19.9 weeks.
This article discussed PSA half-life (PSAHL) following docetaxel and what it might mean for duration.
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PSA half-life My takeaway from this article was that after 84days, if PSA has dropped >50%, it correlates with an improved OS. My PSA dropped from 80.04 to 12.14 in 84 days (to 34.58 in 42days)
Another article that shows achieving a >50% decline in PSA by the 4th cycle (84days) correlates to improved OS
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>50% decline Now this article is quite technical and gets deep into the molecular mechanism of docetaxel resistance. It touches briefly on why JEVTANA (cabazitaxel) can be an effective treatment after docetaxel fails
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molecular mechanism of docetaxel resistance One more, this article, which might only be viewable if you are a member of medscape, talks about
a relationship of efficacy with JEVTANA (cabazitaxel) for patients who failed docetaxel (page 4). I expect Jevtana to be one of my future treatments.
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JEVTANA (cabazitaxel) There is a lot here to digest, I hope some of this info helps...
My best to you and your husband