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Ketogenic Diet Halts Tumor Growth

 

Prostate Cancer Cell Replication
Prostate Cancer Cell Replication

It has long been understood that tumor cells of any kind require high levels of glucose to grow and spread (1,2).  It is also recognized that higher levels of insulin, commonly found in patients with insulin resistance or type II diabetes, are 2.4 times more likely to stimulate the development of breast cancer (3). A diet low in glucose has thereby been theorized to be an adjunct to cancer treatment.

Ketogenic diets have been demonstrated to be therapeutically useful in the treatments of epilepsy and cardiovascular disease (4). A ketogenic diet is one in which carbohydrate levels are kept below 50 grams per day and fat intake is increased to the point that the body shifts its metabolism to use triglycerides, and the ketones derived from triglycerides, as the primary fuel source for the majority of the cells within the body.  With this understanding in mind, the application of a ketogenic diet, one high in fat and protein with limited carbohydrate or glucose has been suggested as a adjunct to cancer treatments (5).

KetoOS
KetoOS – Drinkable Exogenous Ketones

A recent study (6) in the Oncology Letters evaluated the benefits of a ketogenic diet in 78 cancer patients in clinical practice.  A novel marker measuring the tumor cells use of glucose called transketolase-like-1 (TKTL1) was closely monitored, as was each of the 78 patients adherence to a ketogenic diet.  Increased TKTL1 was noted in more aggressively active and growing tumors (7,8).

Among the 43 males and 35 females, 7 patients agree to and followed a fully ketogenic diet and 6 of them followed a partially ketogenic diet.  Ketogenic meals were provided by a German company called Tavarlin that would prepare and mail ketogenic meals including oil, fat, snacks, bread, protein and energy drinks.  Dietary journals were reviewed every three months over a period of about 10 months.

40 % of these patients experienced a halting of the tumor progression and 60% experienced improvement noted by normalization of TKTL1 or reduction in TKTL1, respectively.  Those on a ketogenic diet demonstrated an average reduction of TKTL1 by approximately 50%.

This is the first study of its kind and has significant potential.  Could dietary carbohydrate restriction be an effective cancer treatment or adjunct to cancer treatment?

Because the food diaries were based on reporting only, the sample study was very small, and patients treated in the outpatient setting have the possibility of variability in the standard oncologic treatments,  the results must be interpreted with caution.  However, the data is very promising.   This study is one in which I have great interest as I have seen similar results in my clinic on a case by case basis.

Based on the limitations noted above, rigorous randomized control studies are needed, but this is an exciting an promising first step.  Additionally, the presence of a marker for tumor growth that correlates with diet is remarkable.  And, it provides the ketogenic specialist a possible measurement tool that could be used clinically.

 

References: 

  1. Klement RJ and Kämmerer U: Is there a role for carbohydrate restriction in the treatment and prevention of cancer? Nutr Metab (Lond) 8: 75, 2011
  2. Vaughn AE and Deshmukh M: Glucose metabolism inhibits apoptosis in neurons and cancer cells by redox inactivation of cytochrome c. Nat Cell Biol 10: 1477-1483, 2008.
  3. Gunter MJ, Hoover DR, Yu H, Wassertheil-Smoller S, Rohan TE, Manson JE, Li J, Ho GY, Xue X, Anderson GL, et al: Insulin, insulin-like growth factor-I, and risk of breast cancer in postmenopausal women. J Natl Cancer Inst 101: 48-60, 2009.
  4. Paoli A, Rubini A, Volek JS and GrimaldiKA: Beyond weight loss: A review of the therapeutic uses of very-low-carbohydrate (ketogenic) diets. Eur J Clin Nutr 67: 789-796, 2013.
  5. Ruskin DN and Masino SA: The nervous system and metabolic dysregulation: Emerging evidence converges on ketogenic diet therapy. Front Neurosci 6: 33, 2012.
  6. Jansen, N., Walach, H.”The development of tumours under a ketogenic diet in association with the novel tumour marker TKTL1: A case series in general practice”. Oncology Letters 11.1 (2016): 584-592.
  7. . Schwaab J, Horisberger K, Ströbel P, Bohn B, Gencer D, Kähler G, Kienle P, Post S, Wenz F, Hofmann WK, et al: Expression of Transketolase like gene 1 (TKTL1) predicts disease-free survival in patients with locally advanced rectal cancer receiving neoadjuvant chemoradiotherapy. BMC Cancer 11: 363, 2011.
  8. Zhang S, Yang JH, Guo CK and Cai PC: Gene silencing of TKTL1 by RNAi inhibits cell proliferation in human hepatoma cells. Cancer Lett 253: 108-114, 2007

Today’s Weight Loss Rx . . .

A few of my patients have recently asked me, “Dr. Nally, why to you post pictures of your horse, koi and farm animals on instagram?”

Let me answer that question with the following questions:

  • Do you find yourself longing for the apocalypse?
  • Do you find yourself looking for a reason to live?
  • Are you feeling tired, irritable, stressed out?
  • Do you or you family find yourself to be overly cynical, jaded or emotionally numb?

If you can answer “yes” to any of the questions above, then I highly recommend prescription strength nature . . .

All parody and humor aside, full strength prescription nature is one of the very best treatments for stress.

I find that sitting outside with my animals, watching the birds, dogs, horses and ducks dramatically helps with lowering my stress levels and helps me re-focus.  You can see my favorite place to sit on my farm and watch nature . . . here on Katch.me

You may find the following posts very insightful in explaining how stress wreaks havoc on your weight loss, mood & emotions and how to go about fixing it:

For someone like me, who spends 14-18 hours a day taking care of illness and sickness, I have found that spending time in nature is often more therapeutic than any pill available in the pharmacy.  So, this afternoon, if your looking for me, I’ll be taking my own medicine, a prescription of Nature Rx on my horse.

Obesity Leads to Silent Vitamin A Deficiency

Vitamin ARecent research from Cornell University, recently published in Nature, reveals that increasing obesity leads to poor uptake of Vitamin A in the organ tissues of mammals including humans.  Vitamin A (Retinol) is a key vitamin that helps in gene expression and regulation.   Vitamin A uptake has been shown to diminish in obese patients and patient with hepatic steatosis [fatty liver disease or non-alcoholic fatty liver disease (NAFTL)].

This is a key finding and gives further evidence of the genetic expression of obesity and it’s effect on both the parent and the child.   What is even more fascinating is that this appears to lead to alteration in immune response and changes in cellular differentiation in the human organs.   This means that the Vitamin A deficiencies within the organs are being driven by fatty liver infiltration that is driven by insulin resistance.  This Vitamin A deficiency cannot be detected with a blood test as serum levels of Vitamin A remain normal and has significant roll in masking the cause of autoimmunity function we are seeing more and more of throughout the world.

Metabolic effects of vitamins on the Immune System
Metabolic effects of vitamins on the Immune System

So how do you get your Vitamin A in a ketogenic diet?  Vitamin A can be found in meats (specifically liver and organ meats), eggs, butter, and cod liver oil.  It can also be found in leafy greens, squash and peppers.  The reduction in insulin production that occurs in a low-carb, ketogenic and even paleolithic diet reduces the fatty liver infiltration that arises with the standard American diet (SAD diet).  Clinically, I have seen people reverse the steatosis of the liver within 12 months in my practice through carbohydrate restriction.

More research is needed, of course, but the take home message is that the ketogenic lifestyle plays an even greater roll in genetics and immunity than we ever thought.  More to come . . . I’m sure.

You can see today’s periscope on this subject below . . .

or you can watch it here on Katch:  https://www.katch.me/docmuscles/v/0f7b9835-1ac2-378e-a844-5647e86b700d

Have a great Thursday!!!