Cancer Drug Designer Reveals Chemo Timing Science That Cuts Nausea, Neuropathy & Boosts Efficacy

When you take chemotherapy matters as much as what you take. The timing science that changes everything. #chronotherapy #chemotherapy #chemotherapysideeffects

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Episode Description:

Most people on chemo never get asked that question.

But the answer could change everything about how you feel.

• There's a timing window that exists for your specific drugs
• Missing it doesn't just affect side effects — it affects how well the treatment works
• Your oncologist probably hasn't mentioned it

50+ clinical trials. Peer reviewed. Zero additional cost.

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Inquiries: 

info@elevatingcancertreatment.com

https://elevatingcancertreatment.com

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Disclaimer:
The information provided in this podcast is for educational and informational purposes only, and does not constitute medical advice. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have heard or read in this podcast or on this channel.
Reliance on any information provided by Dr. Jay Chaplin or Elevating Cancer Treatment is solely at your own risk. Dr. Jay Chaplin is a scientist and drug developer, not a medical doctor providing patient care. The content presented here reflects general scientific understanding and research, and may not be applicable to your individual health circumstances. Individual medical conditions and treatments vary, and no two situations are exactly alike.
Always consult with your personal healthcare provider before making any decisions about your health or treatment plan.

Transcript

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What if I told you there's a modification to your chemotherapy or immunotherapy that costs nothing, requires no new prescription, involves no additional drugs, and has been shown in clinical trials to reduce nausea and diarrhea by up to 80%, cut the risk of deropathy by roughly 50%, and improve efficacy of treatment by more than 20%. You'd probably say, why isn't my oncologist already telling me this? That's exactly the question we're going to answer today. Hello, and welcome to Elevating Cancer Treatment, where we explain the science and debunk myths to help you navigate your health journey. My background is a little different. Beyond educating about cancer, I'm actually designing new drugs that are defining the future of oncology. This direct hands-on experience offers me a very different perspective of how these cancer treatments work on the body, interact with the cancer cells, and cause side effects. And these are insights that I'm excited to share with you. If that sounds interesting, make sure to like this video, subscribe to the channel, and hit that notification bell so you never miss an update. And please share it if you find it useful. I'm Dr. Jay Chaplin. An important reminder, I'm a PhD, not an MD. The information in this video is education and it's not medical advice. Every cancer is unique and no general information applies to everyone. Please remember that. Always consult with your healthcare provider for guidance on your specific situation. And two quick things. First, as a thank you for being here, I've created a free resource, 10 things to elevate your chemo journey, which you can download from the link below. And second, by signing up, you'll also get updates on that innovative cancer treatment I'm working on. I'm confident it represents a significant advancement in immunotherapy. So please take a moment, download your free guide, and join us in shaping the future of cancer treatment. The answer is called chrono chemotherapy, or chronotherapy for short, and it's simply the idea that when you take your treatment matters, sometimes as much as what you take. I want to be up front. This is not new, it's not fringe, this has been studied in more than 50 randomized clinical trials spanning many major cancer types, with data going back to the early 1980s. It's peer-reviewed, it's frequently published in Lancet Oncology, it just probably hasn't made it into your infusion suite yet. This video is for you if you are currently on or about to start chemotherapy, especially platinum drugs, 5FU, capesitabine, or arena T can. Stay with me because I'm going to break this down drug by drug, because it changes drug by drug. And honestly, that's part of the reason why your oncologist probably isn't talking about this with you. And if you're on either radiotherapy or immunotherapy, make sure you catch part two. That data genuinely surprised even me. It's also for you if you want to minimize side effects, nausea, diarrhea, and neuropathy, and no one has ever talked to you about treatment timing. Finally, this is also for you if you're a caregiver trying to squeeze every little bit of advantage out of the treatment your loved one is already on. So if any of those apply, keep watching. I review treatment plans, genomics reports, and clinical trial data as part of my consulting work. And I will tell you, timing of treatment administration is rarely documented or discussed in a treatment plan. It's almost never listed as a variable you can optimize. It gets assigned based on clinic scheduling and convenience, not biology. That's a gap I really want to close for you right now. So let's start with the biology because this is where it is grounded. Every cell in your body, and I mean every single one, runs on a daily molecular clock, almost exactly 24 hours. This isn't metaphorical, there are actual clock proteins in your cells. The master regulators are literally called clock and BMAL1. They drive a transcription translation feedback loop that keeps time with remarkable precision, cycling through roughly 24 hours, regardless of whether you're awake, asleep, fed, fasted, or in a windowless room, even down in a cave underground for 72 days straight. It's been tested. Here's why this matters for cancer treatment. That clock controls approximately 10% of your entire transcriptome, 10% of all the genes in your body. One out of 10 of your genes oscillates up and down over the course of a day in a predictable fashion. And many of the genes in that 10% are directly involved in things chemotherapy depends on. Like what? Specifically drug metabolism. Your liver's cytochrome P450 enzymes, the enzymes responsible for breaking down and clearing chemotherapy drugs, are under direct circadian control. The key enzyme, CYP4503A, has a circadian rhythm to its expression. That means the same drug dose given at different times of day produces different blood concentrations, different exposure durations, and different toxicity profiles. This is in speculation, it's been mapped in humans really, really well. Another thing under circadian control is DNA repair. Your body's ability to repair DNA damage, including the collateral damage chemo causes to healthy cells, also follows that circadian rhythm. The BMO-1 clock axis directly regulates nucleotide excision repair and homologous recombination, two of the most useful pieces of DNA repair. Your healthy cells repair DNA damage most efficiently at certain times of day. Tumor cells, whose clocks are often disrupted and broken, repair damage on different schedules. That gap is eminently exploitable. 3. Cell division timing. Cell cycle progression, specifically the G2M checkpoint, where most cells are vulnerable to many chemotherapy agents, is gated by those same clock proteins. Most normal cells divide on a predictable schedule. Many cancer cells with disrupted circadian machinery do not. Timing treatment to hit when normal cells are not actively dividing protects healthy tissue. It reduces side effects. So when we talk about chronotherapy, we're not talking about a minor tweak. We're talking about exploiting three separate intersecting biological rhythms and using those to your advantage simultaneously. When the drug gets cleared, when healthy cells can repair themselves, and when cancer cells are most vulnerable. That's the mechanism. That's what's happening behind chronochemotherapy. Now, let's talk about what actually works clinically, because it's not simple. It's clear, but not simple. So, there's one treatment category where the timing data is so strong and the effect size is so large that I think every patient receiving this treatment should be having the conversation about timing with their oncologist. Can you guess whether that's radiotherapy or immunotherapy? I answer that in part two. But first, the fundamentals for the chemotherapy portion of it. You have two main buckets. You have the morning drugs, and we're going to start with those. We're starting with the fluoropyrimidines, fluxuridine, temazolamide, five fluorauricel, and its oral prodrug, cape cytabine, also known as Zalota. These drugs are the morning drugs. Their optimal window is early, ideally around 4 a.m., and practically speaking, somewhere between 4 a.m. and 10 a.m. There's a really clear mechanism. 5FU and similar drugs are broken down primarily by an enzyme called dihydropyrimidine dehydrogenase, or DPD. DPD activity follows a very strong circadian rhythm. It's lowest in the early morning, which means 5FU stays active in your system for longer, giving you more drug effect per unit of dose. At the same time, the healthy cells in your gut lining and your bone marrow, the cells most vulnerable to 5FU toxicity, are in repair mode and lower division rates. So, early morning hours, best time. Your body is less susceptible, the cancer is still very susceptible. So the data on this is really striking. The clinical trials have found regularly that patients taking 5FU or cape cytabine in the early morning compared to evening dosing had up to 80% reduction in nausea and diarrhea, approximately 50% reduction in peripheral neuropathy, and more than 20% improvement in efficacy. And very importantly, fewer dose reductions required because of toxicity. That matters enormously because dose reductions just by themselves compromise outcomes. Okay. So for patients on Cape Cidabine, the oral pill, this is immediately actionable. You control when you take it. Your oncologist probably prescribed it twice daily. The question is whether you can shift both doses earlier. There's also a metronomic dosing approach that fits very naturally with early morning timing. We'll cover that in the separate episode. For patients receiving 5FU by infusion, it's harder to control, but not impossible. First off, portable infusion pumps can be programmed with chrono-modulated delivery. More early in the morning, less in the afternoon. That's something that was pioneered by Dr. Francis Levi in France, who has been publishing on this for decades, literally since 1979. It's worth asking your infusion center whether this is an option for their equipment. Now, temazolamide, the oral chemotherapy used primarily for glioblastoma and some brain tumors, also belongs in this morning camp. It targets DNA methylation patterns that are more accessible to damage in the morning. Temosolamide crosses the blood-brain barrier without any timing help. We'll talk about that in a bit. What changes with timing for temazolamide is how vulnerable the tumor cells are when it arrives. Now, there's the afternoon drugs. For the platinum-based drugs, cisplatin, carboplatin, and oxaliplatin, these are all afternoon to evening drugs. Their optimal window appears to be after 4 p.m. and in some studies after 6 p.m. The mechanism here is a bit different. Platinum compounds cause DNA crosslinks. The enzyme systems that repair those crosslinks, particularly nucleotide excision repair, are much more active in the afternoon and evening in normal healthy cells. This means that your healthy cells are better equipped to fix platinum-induced damage when dosed in the afternoon, while tumor cells with disrupted repair machinery are not. Their clock is thrown off. This is where combination regimens can get complicated, and this is very clinically important. The classic Full Fox regimen combines oxaliplatin, an afternoon drug, with five fluorouricyl and leukovorin. Those are morning drugs. One's a morning drug, one's an afternoon drug. If you give both of them at the same time, morning or evening, either one, the chronotherapy benefits largely cancel each other out. The optimal approach is to separate them. Do the 5FU early, the oxaliplatin late. This is known as chronomodulated full fox, with delivery time to exploit both of those windows, and it's been studied and shows very good benefit. But it requires programmable pump technology or changing from 5FU to cape cycabine. Now, arena T can in full Fox Erie or switching off a full fox, that also belongs in the afternoon window. Its active metabolite, SN38, is processed by enzymes that follow their own circadian rhythm. Afternoon to evening dosing is associated with significantly better tolerability. And now we get to the complicated ones. Doxorubicin, the anthracycline used in many breast cancer, lymphoma, and sarcoma regimens, really doesn't have clean, consistent timing data the way that fluoropyrimidines or platin drugs do. Early experiments and modeling efforts suggested that evening doses of doxorubicin minimized the cardiotoxicity, the heart toxicity, and slowed metabolism slightly, which could and should improve efficacy. But larger clinical trials didn't consistently confirm this. We'll talk about those later. Importantly, there was only one reversal, meaning that evening dosing wasn't worse, with one exception. It just wasn't dramatically better in most of those studies. That one exception is notable. It's a study of women with diffuse large B cell lymphoma on RCOP, which includes doxorubicin and prednisone. That study found that morning dosing was substantially better. This is almost certainly because prednisone, a glucocorticoid steroid hormone, has extremely powerful interactions with the circadian clock and changes the pharmacological calculus entirely. Also, lymphomas and leukemias behave differently from solid tumors with respect to circadian sensitivity. So I'd call doxorubicin timing context dependent rather than clearly established. So I mentioned brain metastases earlier. For patients with brain metastases receiving standard chemotherapy, not temazolamide, but systemic chemo for metastases, including brain mets from other primaries, there is an interesting data point. The blood brain barrier does have a circadian rhythm to its permeability as well. Some evidence suggests it is more permeable at night, which would allow better central nervous system penetration of drugs dosed in the evening. One set of studies found roughly 20% improvement in survival with evening dosing, specifically in patients with brain metastases. Now, I'll be honest, the evidence base here is thinner than I would like, and I wouldn't make a treatment decision based on a single data set. Especially here, because brain metastases are rarely the critical treatment target. Usually it's the metastases in the rest of the body that are the more critical target. But if you happen to be treated for brain mets and you have scheduling flexibility, it's a question worth asking your team about or contacting us about. Finding that balance between the different targeting methods. Okay. So I also want to be realistic about what's actionable here, because I know the way infusion centers work. For oral drugs, cape cytobine, themosolamide, you've got a pill. You determine when you take it. You have direct control. You can take them earlier in the day. Again, ideally between 4 a.m. and 10 a.m. If you take capsidabine twice daily, see if you can shift both doses earlier rather than splitting them equally across the day. Or, better yet, look into metronomic therapy. It will probably be in our next episode. Or infused chemotherapy, like Sally Platin, ArenaTica, and 5FU, largely at the mercy of scheduling in the infusion center. But you can always ask. Never hurts to ask. Talk to your oncologist, talk to your medical team about whether your infusion time can be adjusted, either earlier or later. See if your regimen can be split. See if you can optimize for both morning and afternoon drugs. Ask whether the center has chronomodulated infusion protocols or programmable pumps available. Most will not, but some do. And the question often opens up a really good conversation. Now, for those of you who are shift workers or night owls, your circadian clock is probably shifted. The times I've given are based on a standard day-night schedule. If you do shift work or have severely disrupted sleep patterns, your optimal timing windows are probably shifted. Maybe by several hours and not necessarily in the way that you expect. This is a meaningful variable and worth discussing with a physician who understands chronobiology, or give us a call. You can track this for yourself by tracking your temperature cycles, with higher temperatures being your daytime hours, and map that onto a normal day to tell when your morning and your evening dosing windows are. You can figure out what the shift is based on your body temperature. For women specifically, I do want to be transparent. The effect sizes for chronotherapy are generally larger in men than they are in women. This appears to be due in differences in circadian rhythm structure and intensity between the different sexes. Chronotherapy still provides benefit in women, the magnitude just may be smaller. So why hasn't your oncologist mentioned this? That's the obvious question. The honest answer is a combination of things. So, first off, even though chronotherapy data has been around for 40 years, the trials have been somewhat inconsistent, usually because they were poorly controlled, sometimes because they mixed morning and evening drugs in the same regimen without separating them, like Fulfox. Some studies were pre-planned and well controlled, they tended to show very big effects, I trust those, while others were retrospective and included anyone with more than 50% of their treatments in a timing window, less of an effect there. Often because the timing of the doses doesn't line up between studies. What one considers a morning window is different than a different study. And often these studies were small and uncoordinated university studies. Biology wasn't really well understood, and the criteria weren't set before the trial began. So it's hard to make everything line up, and the quality of those studies is really all over the map. I understand that. But even with those issues, though, the overall effect remains remarkably robust and consistent, with just enough lack of certainty for the NCCN to state that more research is needed. Let me be clear, there is no downside, and potentially a very large upside to shifting the timing of your chemotherapy. Now, the field also requires infrastructure changes. Things like programmable pumps and flexible scheduling that most infusion centers don't have and don't want to have because they'd rather spread out the workload and staffing evenly throughout the day. It's both easier and less expensive for the hospital to spread out appointments that way. And in oncology, changing what time someone gets their infusion isn't as obvious and easy to explain of an intervention as just prescribing a new drug. None of that makes it okay to leave this on the table, though. This could be a huge benefit for you, and an easy one, but it does explain why the gap still exists. So, the next time you sit down with your oncologist or your infusion nurse and ask this specific question, is there data on optimal timing for the drugs in my regimen? And is there any flexibility in when I receive them? Now, if you're taking one of the drugs we explicitly discussed today, you already know the answer to the first part of that question, and you can just lead with the second. That's it. You don't have to become an expert in chronobiology. You really don't. You can just have that conversation. You just have to ask. And now you know enough to understand the answer that they give you. Zero cost, zero additional toxicity, no new prescriptions, just changing the clock and getting massively reduced side effects and better efficacy. Why not ask? That's everything on chemotherapy timing, but I promised you something bigger. A finding about scheduling that genuinely caught me off guard, even with my background. The effect sizes are larger than anything we just covered and more consistent. So what do you think? Radiation treatments or immunotherapy? What's your guess? I'll see you with that answer in part two. So if you want to understand another approach to squeezing more efficacy out of chemotherapy while reducing toxicity, one that pairs extremely well with timing optimization, please watch this video on stress and chemotherapy right here. Same concept: better efficacy, better tolerability, smarter biology. If this opened your eyes to a variable your team has never mentioned, please like this video. It helps get this information in front of people who really need it. Subscribe if you want ScienceFord cancer content every week. Please share this with someone on chemo who has never heard of the word chronotherapy before. And, if you will, leave me a comment. Has your oncologist ever mentioned adjusting treatment timing for you? I'd genuinely like to know how many of you have had that conversation and how many haven't. It's good to have that information. You can make careful, informed, biologically grounded decisions about your treatment. That's exactly what this channel is here to support. I'll see you in the next video.