SANDPIPER clinical trial
Comments
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Dear Carol,
I think you make many good points there about Metformin. I got a prescription from my primary, based on its anti-cancer activity, but so far haven't taken any because my MO was not in favor of adding into my already complicated mix of drugs. I also read that Sandpiper trial excludes Metformin users (for diabetes), and then also read that Meformin should be synergistic with other drugs as well, so it makes sent to me, for now, to drop the Metformin prescription and plan to pick it up again when I am on some later drug treatment. A friend who takes it for diabetes said her primary said that the body can get to a point where it is not sensitive to it anymore, so if there is an 8-10 year window when it is effective and not after that, then I probably shouldn't be taking it if I don't really need to.
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Well, its all very complicated, obviously. A few days ago a promising new target for metastatic breast cancer came out, which is known to be inhibited by the type II diabetes drug proglitazone. Can also be inhibited by resveratrol. They are devising drugs that will be more selective, and more potent, inhibitors of this new target protein, so, still pre-clinical but nevertheless progress..
http://www.futurity.org/diabetes-drug-breast-cancer-1246372-2/
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TarHeel-Michelle- What are you currently taking? Are you doing OK on it? And how long did it take to lose your SEs from the Taselisib? Thanks!
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In Sandpiper, Taselisib is being investigated as a selective inhibitor of PI3K-alpha isoform. The trial requires the PI3KCA mutation. Taselisib is paired with faslodex. Afinitor (everolimus) is an mTor inhibitor; mTor appears to be downstream of PI3K in the same pathway. But it is pairedwith aromasin. I want to know if there is a drug in this class that could be paired with faslodex for someone without a PI3KCA mutation. The PI3K2B mutation is called a VUS on my report. Does anyone have any leads for me? I want to be ready when my onc says it is time to switch to faslodex.
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SHET- I will ask next week and see what Dana has to say. I do know that without knowing if you have the P13k mutation ---that for me, the next step was falsodex alone. I bet if I tolerated Ibrance and could have stayed on a therapeutic dose like the 100-125 or even 75 for 3 on 1 off maybe I would be doing the Ibrance as well- especially if there was just bone involvement, but that turned out not the case for me. I was 75 two on two off and did a couple of cycles of as the final two doses before I had the progression. Dana said there really wasn't a trial that I would benefit from more than just the faslodex alone. Then he uttered the words that the time frame for faslodex is about 8 months before it fails... Geesh-- In the interim, I am having mutation testing done. No clue why they dragged their feet on that testing.
Hugs Carol
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Hi Carol,
Perhaps the delay is because they need to test the AI-resistant cancer cells, which may have acquired a PI3K mutation that was not in the original cancer? That mutation can arise as part of the mechanism that the cells escape Femara. It is a question for the earlier discussion to do wholesale proteomics and genomics on the cancer to see which therapies might best help- do you want that on the original metastasis or on the cells that come up resistant?
More immunotherapy combinations are starting, and there is one for femara and Keytruda (plus an HDAC inhibitor, which can boost the immunotherapy response/effectiveness) but I didn't see one for Faslodex, which usually lags behind AIs in testing. So if you get a good run with Faslodex, it may be much clearer
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Curious- you are so well educated and understand this so much better than I do. Thank you! MO told me it will take 4 months for the testing to come back? I know they did blood work, and have slides from my bone mets. I also am having some unpleasant SE from the faslodex which I think is neuropathy. I have so many questions for him next week!
Thanks Carol
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Oh, I wish I got this stuff! Geez, can I just hold my breath for two years to see what pans out? I do check the literature DAILY, and because I read and review these type of research papers for a living I can do it fast, but am totally clueless when it comes to the clinical world
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Before my wife (Pauline) got the results of her genetic testing back, which also took a pretty long time, her doctor was planning to put her on Faslodex+Ibrance. Shetland, as far as I know this would be the next best option for you other than chemo if you don't have the mutation that would qualify you for the trial with taselisib.
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Maltese/Carol, remember that the 8-month figure is an average, so it includes people who got much longer than that on it! That's really nice of you to offer to ask your onc for me; only do it if it doesn't take away time you need for your own questions. I saw my onc and asked her if there was something other than taselisib to pair with faslodex, and she mentioned a trial whose name I can't remember now (thank you, letrozole, not). I'll post again when I find it.
Thank you, gp. The thing is, I am on Ibrance right now with letrozole, and my onc, like Carol's, says the next step would be faslodex without Ibrance. "There is no data to support continuing it," she says. The way I see it, if there is progression, we will not know which drug(s) failed, letrozole, Ibrance, or both. And since the tumor does have a PI3K mutation, I figure why not look for a targeted therapy. Maybe I should check in with Foundation One to see if there is any new info on that "variation of unknown significance".
It's great that there is a chance for Pauline to get a new drug that is targeted to her tumor genetics. I hope it turns out great for her.
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The trial my onc mentioned is the SOLAR trial with faslodex plus apelisib or placebo. Unfortunately for me, like SANDPIPER, it requires the PIK3CA mutation. But worth looking at for others!
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Only SOLAR trial locally for me as well, but the interim findings indicate Taselisib is better ... http://www.datamonitorhealthcare.com/taselisib-shows-promise-in-relation-to-other-pi3k-inhibitors-for-hrher2-breast-cancer-patients/
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After reading about SANDPIPER and SOLAR, I requested the consent forms and info. Both studies indicate that some people without the mutation will be enrolled as well to see the drugs' impact on that group. It's first-come, first-enrolled until they reach their quota for those without the mutation. After that point, they will only be enrolling those with the mutation.
Shetland, I totally agree with your question on not knowing which drug failed. I'm on Ibrance + letrozole and my onc is adding fas to the existing mix. I will post more on the Ibrance thread.
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Interesting article at STAT today:
Beware the hype: Top scientists cautious about fighting cancer with immunotherapy
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Moissy- I read that too, but in one paper they refer to the wild-type PI3K patients as 'another control group', so you may want to wait for more data to roll in before jumping for those few open slots, as the existing data indicates these drugs need mutant or overexpressed PI3K
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Great article stephanie!
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Z.,
STAT news is a great resource. I've learned so much from their weekday stories, synopses and links!
Healing regards all, Stephanie
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Cure-ious - Good info, Thanks for pointing that out.
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cure-ious, you asked how long my side effects lasted after I stopped taking taselisib. About 2 months, and I still have have one that lingers, hard to describe -- like painful leg cramps, but in my back. The GI issues disappeared faster than skin and hair/nails problems. Oddly enough, taselisib seemed to depress the AI side effects. Immediately after stopping taselisib, I had many more AI side effects that had not occurred during first 3 months. I'm contemplating going back on low dose of Afinitor to see if it has similar affect on my AI (Femara). Not sure how much longer I can stay on Femara. The side effects are worse than the cancer, and I'm only taking one pill every other day. PET scan and doctor visit next week.
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Thanks for the info, Tar-Heel; I agree, Affinitor may be a better choice. Your AI side effects may be from how long you have been on it now- Great luck with the PET scan!!
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Stage IV Breast cancer I am about to start Sandpiper Phase 3 trial in a few weeks, I have tested positive for the mutation. Interested to know how others on trial are going. My breast cancer was in remission for 20 years. Reoccurrence August 2014 in Lung & Bone. Originally given 18-24 mths median time. Treated Anastrosole stable for 24 mths. New bone cancer in vertebra found mth 26 and tumour markers starting to go up again. Hence offered Sandpiper trial.
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This isn't specifically about SANDPIPER, but this topic seems like a best fit for those interested in immunotherapy and clinical trials:
For cancer patients, newest treatments force the ultimate decision, with no room for error
Maybe we need a new topic on immunotherapy clinical trials and breast cancer...anyone else want to start one?
healing regards, Stephanie
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Terrific article and site, LTS, many thanks! Kathy
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Downunder- please keep posting any info about the trial, side effects, etc- thanks!
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I have an update about my wife Pauline, who started on this trial two weeks ago. Unfortunately, that's as far as she'll make it because her bloodwork yesterday showed very elevated liver enzymes and tumor markers that have doubled over the last month. Based on that she is being taken off the trial. She was feeling pretty poorly most of the week, with moodiness, bone pain, and nausea. It's hard to know which drug caused those side effects, or whether it is the cancer itself. It's also hard to know whether the liver enzymes are up from the trial drug or from the liver mets.
So, we know definitively that her cancer is highly aggressive, and in order to get her liver function back under control her oncologist is starting her on chemo in the next few days. She's having more bloodwork and a CT scan today, which will determine the choice of chemo. This is not where we wanted to end up so quickly. I really hope the chemo is gentle on her and that it gets the liver mets under control. Ugh.
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Hi GP,
Hard news for Pauline and you.
Glad you have confidence in her care team and the next steps in your plan.
Be sure to visit the bco liver mets group at
https://community.breastcancer.org/forum/8/topics/...
You'll find many helpful members and good archives.
Holding you in healing light as you journey further into the unknown, Stephanie
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Thank you, Stephanie, as always.
Gina
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gina - thank you for the update. my thoughts are with you and your wife. the changes in treatment are really hard, but I hope the chemo kicks the cancer to the curb.
>Z<
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hi, I have read all the previous posts.
I am currently on the Sandpiper phase III trial for 14 cycles now. After the 3 cycle my blood sugar increased to the point I was having issues with my eyesight. AIC was at 13. I was given a reduced dose and Metformin which has my sugar under control. I get CT scans every 2 months and each time the 2 targeted lymph nodes are shrinking. I find this combo very tolerable.
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Gina, Thanks for the information, and best of luck with chemo!!
Mishka, Wow, the drug combo seems to elevate blood sugar fast, but great that it can be controlled w/Metformin, and that you have been doing well for quite a long time! Did you fail hormone therapy before you entered this trial, or what previous treatments had you received? thanks...
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