Equine Asthma Does Not Affect Circulating Myostatin Concentrations in Horses

Area of Science:

• Veterinary Medicine
• Respiratory Physiology
• Biomarker Discovery

Background:

• Equine asthma diagnosis lacks reliable methods, impacting horse welfare.
• Elevated myostatin (MSTN) observed in human asthma suggests potential as a biomarker.
• MSTN's role in inhibiting cell growth presents a hypothesis for its involvement in equine respiratory disease.

Purpose of the Study:

• To investigate myostatin (MSTN) plasma concentrations in horses with and without equine asthma.
• To evaluate the potential of MSTN as a diagnostic biomarker for equine asthma.
• To compare MSTN levels across different horse groups: asthmatic, healthy young, and healthy adult leisure horses.

Main Methods:

• Clinical examinations and bronchoalveolar lavage (BAL) cytology were performed on 61 horses.
• Horses were categorized into asthmatic and two healthy groups (young Thoroughbreds, adult leisure horses).
• Plasma MSTN concentrations were quantified using the ELISA method.

Main Results:

• Asthmatic horses exhibited significantly higher plasma MSTN concentrations than healthy young Thoroughbreds (p < 0.05).
• No significant difference in MSTN levels was found between asthmatic horses and healthy adult leisure horses.
• The study is the first to analyze plasma MSTN in equine asthma patients.

Conclusions:

• The findings do not conclusively support MSTN as a reliable early diagnostic marker for equine asthma.
• Further investigation is required to validate the potential role of MSTN in equine respiratory conditions.
• This study provides novel insights into MSTN concentrations in equine asthma, necessitating additional research.