Therapeutics

Ketasyn

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Overview

Name: Ketasyn
Synonyms: Axona, Caprylic Acid, AC-1202
Therapy Type: Dietary Supplement (timeline)
Target Type: Other (timeline)
Condition(s): Alzheimer's Disease
U.S. FDA Status: Alzheimer's Disease (Phase 4)
Status in Select Countries: Sold in the United States as a medical food.
Company: Accera, Inc.

Background

This is a nutritional beverage. Ketasyn/AC-1202 was tested in Phase 1 and 2 safety/dosing trials, but in Phase 2 missed its primary endpoint and was not avanced to Phase 3 efficacy trials. Rather, in 2009 its developer, Accera Inc., brought it to market as a once-daily medical food called Axona. Medical foods do not undergo pre-market FDA review or approval. Unlike dietary supplements, they are not available over the counter but are prescribed by physicians.

Axona is a proprietary formulation of processed coconut or other oils and glycerin. Its active ingredient is caprylic acid, along with other medium-chain triglycerides. Caprylic acid metabolism in the liver leads to substances called "ketone bodies," which cross the blood-brain barrier. These have been hypothesized to provide an alternative to glucose as the brain's source of energy in conditions marked by impaired neuronal metabolism, such as Alzheimer's. Brain imaging by FDT-PET shows cerebral glucose hypometaboism in regions affected by Alzheimer's. 

Axona's effectiveness has been called into question by experts in the field, e.g. , Oct 2009 news series. As a result of media stories covering the controversy (e.g., ABC News), demand for coconut oil as a cheaper source of caprylic acid has risen. However, there is no scientific evidence that it is effective.

Findings

A two-week open-label safety, tolerability, and pharmacokinetics study of different formulations of Ketasyn in 60 healthy elderly volunteers preceded two Phase 2 studies.

From 2004 to 2006, a 90-day, double-blind, multicenter trial in 152 patients with mild to moderate Alzheimer's disease evaluated Ketasyn against the Alzheimer's Disease Assessment Scale—cognitive subscale (ADAS-cog), the Alzheimer's Disease Cooperative Study—Clinician's Global Impression of Change (ADCS-CGIC), and the Mini-Mental State Exam (MMSE). This trial was reported to have improved cognitive function in participants on Ketasyn at the 45-day trial mid-point, though the difference was no longer statistically significant by 90 days. In ApoE4 non-carriers, the effect did remain statistically significant by 90 days. Adverse event discontinuations were 23 percent, mostly for diarrhea, flatulence, and dyspepsia (Henderson et al., 2009).

From 2006 to 2007, a second 90-day trial in 150 older adults with "normal" loss of memory abilities since early adult life evaluated Ketasyn. This trial used changes in the Psychologix and Cogscreen Test Batteries, RAVLT (Rey Auditory Verbal Learning Test), as primary outcome. The results were not published. 

In 2010, Accera started a PET study at the University of California, Los Angeles, to evaluate the effects of Axona on cerebral metabolism in 22 participants with Alzheimer's disease. This trial measures regional cerebral blood flow in response to Ketasyn, comparing ApoE4 carriers to non-carriers.

For all clinical trials on Ketasyn, see clinicaltrials.gov

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References

News Citations

  1. Medical Foods—Fallback Option for Elusive AD Drug Status?

Paper Citations

  1. . Study of the ketogenic agent AC-1202 in mild to moderate Alzheimer's disease: a randomized, double-blind, placebo-controlled, multicenter trial. Nutr Metab (Lond). 2009;6:31. PubMed.

External Citations

  1. clinicaltrials.gov
  2. ABC News

Further Reading

Papers

  1. . Role of Medium Chain Triglycerides (Axona(R)) in the Treatment of Mild to Moderate Alzheimer's Disease. Am J Alzheimers Dis Other Demen. 2014 Jan 9; PubMed.
  2. . Use of medical foods and nutritional approaches in the treatment of Alzheimer’s disease. Clin Pract (Lond). Mar 2012; 9(2); 199-209
  3. . Effects of beta-hydroxybutyrate on cognition in memory-impaired adults. Neurobiol Aging. 2004 Mar;25(3):311-4. PubMed.