New study from Steve Freedland et al.
"Serum metabolomic analysis of men on a low-carbohydrate diet for biochemically recurrent prostate cancer reveals the potential role of ketogenesis to slow tumor growth: a secondary analysis of the CAPS2 diet trial" [1]
Bottom line: Low-carb diet may lenghthen PSADT {PSA doubling time}.
"Conclusion: These results suggest a potential association of ketogenesis and TCA * metabolites with slower PC growth and conversely glycolysis with faster PC growth. The link of high ketone bodies with longer PSADT supports future studies of ketogenic diets to slow PC growth."
* TCA: "The citric acid cycle (CAC) – also known as the TCA cycle (tricarboxylic acid cycle) or the Krebs cycle[1][2] – is a series of chemical reactions to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins." [2]
"Regression analysis of the PSADT revealed a correlation between longer PSADT with higher level of 2-hydroxybutyric acids, ketone bodies, citrate and malate.
"Longer PSADT was also associated with LCD {low-carb diet} reduced nicotinamide, fructose-1, 6-biphosphate (FBP) and 2-oxobutanoate."
-Patrick
[1] pubmed.ncbi.nlm.nih.gov/353...
Prostate Cancer Prostatic Dis
. 2022 Mar 25. doi: 10.1038/s41391-022-00525-6. Online ahead of print.
Serum metabolomic analysis of men on a low-carbohydrate diet for biochemically recurrent prostate cancer reveals the potential role of ketogenesis to slow tumor growth: a secondary analysis of the CAPS2 diet trial
Jen-Tsan Chi 1 , Pao-Hwa Lin 2 , Vladimir Tolstikov 3 , Lauren Howard 4 , Emily Y Chen 3 , Valerie Bussberg 3 , Bennett Greenwood 3 , Niven R Narain 3 , Michael A Kiebish 3 , Stephen J Freedland 5 6
Affiliations collapse
Affiliations
1 Department of Molecular Genetics and Microbiology, Center for Genomics and Computational Biology, Durham, NC, USA. jentsan.chi@duke.edu.
2 Department of Medicine, Division of Nephrology, Duke University Medical Center, Durham, NC, USA.
3 BERG, Framingham, MA, USA.
4 Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.
5 Center for Integrated Research in Cancer and Lifestyle, Cedars-Sinai, Los Angeles, CA, USA. stephen.freedland@cshs.org.
6 Durham VA Medical Center, Durham, NC, USA. stephen.freedland@cshs.org.
PMID: 35338353 DOI: 10.1038/s41391-022-00525-6
Abstract
Background: Systemic treatments for prostate cancer (PC) have significant side effects. Thus, newer alternatives with fewer side effects are urgently needed. Animal and human studies suggest the therapeutic potential of low carbohydrate diet (LCD) for PC. To test this possibility, Carbohydrate and Prostate Study 2 (CAPS2) trial was conducted in PC patients with biochemical recurrence (BCR) after local treatment to determine the effect of a 6-month LCD intervention vs. usual care control on PC growth as measured by PSA doubling time (PSADT). We previously reported the LCD intervention led to significant weight loss, higher HDL, and lower triglycerides and HbA1c with a suggested longer PSADT. However, the metabolic basis of these effects are unknown.
Methods: To identify the potential metabolic basis of effects of LCD on PSADT, serum metabolomic analysis was performed using baseline, month 3, and month 6 banked sera to identify the metabolites significantly altered by LCD and that correlated with varying PSADT.
Results: LCD increased the serum levels of ketone bodies, glycine and hydroxyisocaproic acid. Reciprocally, LCD reduced the serum levels of alanine, cytidine, asymmetric dimethylarginine (ADMA) and 2-oxobutanoate. As high ADMA level is shown to inhibit nitric oxide (NO) signaling and contribute to various cardiovascular diseases, the ADMA repression under LCD may contribute to the LCD-associated health benefit. Regression analysis of the PSADT revealed a correlation between longer PSADT with higher level of 2-hydroxybutyric acids, ketone bodies, citrate and malate. Longer PSADT was also associated with LCD reduced nicotinamide, fructose-1, 6-biphosphate (FBP) and 2-oxobutanoate.
Conclusion: These results suggest a potential association of ketogenesis and TCA metabolites with slower PC growth and conversely glycolysis with faster PC growth. The link of high ketone bodies with longer PSADT supports future studies of ketogenic diets to slow PC growth.
© 2022. The Author(s), under exclusive licence to Springer Nature Limited.
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