Application of fluorogenic derivatization-liquid chromatography-tandem mass spectrometric proteome method to skeletal muscle proteins in fast Thoroughbred horses.

This research article explains the testing of a method called fluorogenic derivatization-liquid chromatography-tandem mass spectrometric analysis (FD-LC-MS/MS) on Thoroughbred horse muscle. The study optimized the process for protein extraction, producing repeatable results and allowing changes in protein expression during exercise to be studied.

Research Methodology

• The study used the FD-LC-MS/MS method, which is a highly accurate approach for protein analysis. It involves a step for fluorogenic derivatization (FD), where proteins are chemically altered to become fluorescent, making them easier to detect. This is followed by separation of components using liquid chromatography (LC), and then the detailed examination and identification of the protein types by tandem mass spectrometry (MS/MS).
• To improve the efficiency of this method for Thoroughbred horse muscle analysis, the team refined the protein extraction and separation procedures. This resulted in reproducible chromatograms – graphs showing the results of the chromatography.
• The researchers then used this method to analyze changes in protein expressions during exercise.

Results and Findings

• The researchers quantified the changes in protein expression by calculating the ‘training-to-detraining’ ratios for different proteins.
• They then investigated the correlation between these ratios and VO2max, a measure of maximum oxygen consumption. VO2max is used as an indicator of running speed or aerobic fitness.
• The study found that the expression of 16 proteins, especially those linked with anaerobic energy production, increased with an increase in VO2max. This suggests that these proteins are related to an increased running speed in horses.
• Therefore, the use of the method supported the understanding of the biochemical processes related to faster running and could be beneficial for evaluating training effects in Thoroughbred horses.