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Drug testing and analysis2025; doi: 10.1002/dta.3897

Endogenous Nature of Hydrocortisone Acetate in Horse.

Abstract: Hydrocortisone acetate, a synthetic acetate ester of hydrocortisone, was detected in horse blood samples collected from Thoroughbreds. Hydrocortisone acetate is generally considered an indicator for exogenous administration in horses. As hydrocortisone acetate has been previously reported to be endogenous in selected mammals, a proof-of-concept study was performed to evaluate the possible endogenous nature of hydrocortisone acetate in horses by in vitro incubation experiments using homogenized horse brain tissue.
Publication Date: 2025-04-14 PubMed ID: 40230061DOI: 10.1002/dta.3897Google Scholar: Lookup
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  • Journal Article

Summary

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This research article investigates the natural presence of Hydrocortisone Acetate, a synthetic medicinal compound, in horse blood samples.

Research Objective

  • The research aims to understand whether Hydrocortisone Acetate – a synthetic variant of hydrocortisone generally used for medicinal purposes – can be naturally occurring in horses, specifically in Thoroughbreds.

Background and Significance

  • The presence of hydrocortisone acetate in horses is generally considered an evidence of synthetic administration. However, it has been previously reported to be naturally occurring in certain mammals.
  • Therefore, its presence in horse blood can lead to false-positives, causing unfair disqualification or penalties in horse racing events. This makes understanding the nature of hydrocortisone acetate in horses crucial.

Research Methodology

  • The researchers used in vitro incubation experiments to test the endogenous nature of hydrocortisone acetate in horses.
  • They used homogenized brain tissue from horses for these experiments, as these tissues accurately represent physiological conditions.

Implications and Future Work

  • The results of this study could lead to a better understanding of prohibited substances in equestrian sports and could lead to fairer rulings regarding the use of medicinal substances in horses.
  • Further research could be conducted using other tissues and checking for other substances besides hydrocortisone acetate that could be endogenous in nature.

Cite This Article

APA
Kong FKW, Wong ASY, Wan TSM, Ho ENM. (2025). Endogenous Nature of Hydrocortisone Acetate in Horse. Drug Test Anal. https://doi.org/10.1002/dta.3897

Publication

ISSN: 1942-7611
NlmUniqueID: 101483449
Country: England
Language: English

Researcher Affiliations

Kong, Fred K W
  • Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, NT, Hong Kong, China.
Wong, April S Y
  • Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, NT, Hong Kong, China.
Wan, Terence S M
  • Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, NT, Hong Kong, China.
Ho, Emmie N M
  • Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, NT, Hong Kong, China.

References

This article includes 9 references
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Citations

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