https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4102383/?utm_content=buffer...
Prolonged Fasting reduces IGF-1/PKA to promote hematopoietic stem cell-based regeneration and reverse immunosuppression
A key reason why TKI's fail to cure CML is the fact that non-dividing leukemic stem cells avoid TKI induced cell death (via apoptosis). TKI's work by binding to the energy site of dividing cells (ATP socket). Only when a CML cell is dividing is energy demand high enough that without ATP fuel, the cell dies. That is how TKI's work (for the most part).
Leukemic stem cells, however, can remain dormant for years. In the absence of a TKI, when they start to divide under various signals, our CML disease relapses and we have to start taking TKI again. Some of us while PCRU are able to exhaust CML stem cells (LSC's) while taking a TKI and can move on to treatment free remission (~40% of PCRU patients). And that is great news, but for the rest of us, apparently, enough LSC's stay dormant long enough to always escape TKI assault. So when our TKI is stopped, CML soon thereafter relapses (often within six months).
This is where fasting comes in.
Apparently, fasting (3-5 days, water only), triggers blood system renewal. First, during the fast, older white blood cells are autophaged (i.e. destroyed and recycled). This process provides necessary proteins and building blocks to keep the body healthy during no food intake and also depletes the blood of white cells (mostly non-functioning anyway so you won't miss them). Various hormones and protein signals are changed which primes the bone marrow stem cells to divide rapidly in order to restore blood function. Essentially old blood cells are replaced with new ones directly derived from the stem cells (and this would be both LSC's and HSC's). The actual renewal occurs during re-feeding. When food is re-introduced (fast is ended), blood stem cells (leukemic as well as normal ones) are triggered to come out of quiescence and rapidly divide. This is key.
If we can cause (through fasting) a forcing of LSC's to divide on "cue", then in the presence of a TKI, they will be killed. LSC's are not immune to TKI's. They die when they are dividing and can't get ATP (TKI blocks it). There is evidence that depleting LSC's is key to treatment free remission. Getting at the LSC's cures CML.
My thinking is to put myself into a series of 3-5 day fasts over a year (maybe two or three times) as a way to force 'en masse' a coming out party for the LSC's - where my Sprycel drug is waiting for them to kill them. This way I can more quickly deplete this population of cells while my normal cells take their place. It's a theory that I am testing right now. (I have done one fast during Lent so far). I will do this two more times and then stop taking Sprycel to test if my CML doesn't return. I tried cessation once and it didn't work for me (I never lost MMR, but I did lose PCRU, so I went back on drug).
Interestingly - there is also evidence that fasting alone could weaken CML on its own. This is because T-cell population (killer cells) are modified and become more aggressive against cancer cells - especially on low carb, high fat diets. Key here is to keep the body in Ketosis which starves cancer cells (solid tumor as well as blood) of necessary sugar.
What I am describing above is no formal "cure" or even scientific (need clinical trial under strict mathematical control). But it's my body and any "idea" which doesn't cause undo harm that can be tested easily is worth it to me. And there is the side benefit of fasting - better metabolic health, less weight, lower blood glucose - all good to have anyway.
Not eating chocolate, however, will be tough.