Ketogenic Diet in Advanced Cancer
|ClinicalTrials.gov Identifier: NCT01716468|
Recruitment Status : Completed
First Posted : October 29, 2012
Results First Posted : May 9, 2016
Last Update Posted : May 9, 2016
|Condition or disease||Intervention/treatment|
|Cancer||Other: Ketogenic Diet|
Hide Detailed Description
In their natural state within the body, cells normally depend on cellular respiration as the source of energy and ATP. During times of complete or partial food deprivation these cells can also rely on ketosis as an additional energy source. Tumor cells in contrast are defective in this respect, lacking in the ability to utilize ketone bodies for energy and instead are heavily dependent on glycolysis for their survival. Malignant cells depend heavily on glycolysis for energy production even in high oxygen states. If the investigators limit the supply of glucose, glycolysis would decrease and tumor cells would lose their main source of energy supply.
In addition, increased carbohydrate intake is sensed by the pancreas and results in increased insulin secretion. Insulin is important for normal growth in the body and is a potent growth factor stimulating mitosis via signal transduction and DNA synthesis. It is a potent growth factor which acts by binding to cell membrane insulin receptors and stimulates mitosis via protein kinase B/Akt- mediated signal transduction and DNA synthesis.
Insulin also has anti-apoptotic properties, meaning less tumor cell death. Increased circulating insulin levels have been associated with increasing risk of certain cancers (i.e. prostate and colon cancer), but no association with serum glucose levels (8). By limiting carbohydrate intake, the investigators might expect decreased tumor growth and increased tumor cell destruction.
Most human and mouse tumors take up more glucose than their surrounding normal tissue. By using positron emission tomography with fluoro-deoxy-glucose, FDG-PET scans can be used to detect and monitor tumor response to chemotherapy and radiation.
In this study, PET/CT scanning would be utilized to measure the amount of (at the screening visit) glucose activity within certain tumors, before and after the diet.
Primary Aim: To determine the safety and tolerability of a modified low carbohydrate diet in people with advanced cancer across different tumor types.
Hypothesi(e)s: The long term tolerability of the KD (Ketogenic Diet) has been established (Groesbeck et al., 2006). Recent studies involving human patients with brain cancer showed tolerability of the Ketogenic diet over a period as long as 19 months with minimal side effects. However the MAD (Modified Atkins Diet) long term side effects are as of yet unclear. Given the similarity of the MAD compared to the KD, and being less restrictive, the long term side effects (kidney stones, dyslipidemia, gastroesophageal reflux) of the MAD is projected to be similar, if not reduced, in comparison to the KD. Modified carbohydrate diets as well as ketogenic diets have been tolerated by people with epilepsy. It is hypothesized that the effect this diet will have on overall weight loss, hyperlipidemia, and blood glucose levels will be minimal and tolerable even by cancer patients over a prolonged period of time, up to 12 months or possibly longer. Given the tolerability of the diet in brain cancer patients, it is hypothesized that patients with other types of tumors will find this diet tolerable and safe.
Secondary Aims: To determine if quality of life is improved with the use of this diet. To determine if the diet has any effect on tumor growth (size or spread) or to determine if there is any effect on progression free survival (PFS) and overall survival (OS) of subjects enrolled in the study.
Hypothesis(e): The diet showed good tolerance in human adult patient studies wherein the diet was tolerated well up to 12 weeks in a group of diverse tumor types and up to more than 10 years in a glioma patient. It is hypothesized that cancer patients will be able to tolerate this diet at 16 weeks or more. Studies in animals as well as in tumor tissue models show slowing of tumor growth, and in some instances also showed tumor shrinkage. Human case reports and a small study of 16 patients show tumor shrinkage and stable disease while on the diet.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||17 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||A Low-Carbohydrate Diet for Advanced or Metastatic Cancer|
|Study Start Date :||October 2012|
|Primary Completion Date :||January 2015|
|Study Completion Date :||December 2015|
Advanced or metastatic cancer
Patients chosen must be diagnosed with advanced or metastatic cancer of the following tumor types (colorectal, prostate, brain, breast, pancreatic, hepatobiliary, melanoma, sarcoma, non-small cell /small cell lung, genitourinary cancers).All participants will be assigned to a ketogenic diet. There are no randomization to other separate arms since this is a safety and feasibility study.
Other: Ketogenic Diet
modified ketogenic diet
- To Determine the Safety and Tolerability of a Modified Low Carbohydrate Diet in People With Advanced Cancer Across Different Tumor Types. [ Time Frame: 16 weeks ]Recent studies involving human patients with brain cancer showed tolerability of the Ketogenic diet over a period as long as 19 months with minimal side effects. It is hypothesized that the effect this diet will have on overall weight loss, hyperlipidemia, and blood glucose levels will be minimal and tolerable even by cancer patients over a prolonged period of time, up to 12 months or possibly longer. Serum fasting glucose, cholesterol, total, LDL, HDL and triglycerides, serum ketones in mg/dl units , weight in lbs. will be measured at designated time points. Number of patients actually tolerating the diet for at least 4 weeks or more will be recorded.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01716468
|United States, Pennsylvania|
|VA Pittsburgh Healthcare System|
|Pittsburgh, Pennsylvania, United States, 15240|
|Principal Investigator:||Jocelyn Tan, MD||VA Pittsburgh Healthcare System|