High-performance liquid chromatographic determination of N-alpha-acetyl-L-carnosine in equine plasma.

This study presents a method for determining the levels of N-alpha-Acetyl-L-carnosine (NAcCAR) in horse plasma using high-performance liquid chromatography. The method’s efficiency is validated through applications on plasma following oral and intravenous administration of NAcCAR.

Research Methods and Procedures

In the experiment, the researchers made use of the following procedures:

• NAcCAR was extracted from horse plasma using perchloric acid.
• The extract was examined by high-performance liquid chromatography (HPLC), which is a method widely used in biochemistry and analytical chemistry to identify, quantify and purify the individual components in a mixture.
• The HPLC method used involved a 3 microns Hypersil ODS column which was eluted (or cleansed) with a chemical mixture of 5 mM phosphoric acid-1 mM triethylamine at pH 2.58.
• For the further purifying and isolating NAcCAR from the mixture, the researchers used solid-phase extraction on Isolute PRS (propylsulphonyl) columns.

Key Findings and Implications

From the study, the researchers found the following:

• The mean retention time for NAcCAR in the HPLC process was approximately 5.9 minutes with a variation of ±0.2 minutes. This retention time marks the period it took for NAcCAR to pass through the HPLC system, which reflects its physical and chemical properties as well as the nature of the HPLC system.
• The recovery rate of NAcCAR from the plasma via solid-phase extraction ranged between 93.9-99.7%, indicating a high level of efficiency in the extraction procedure.
• The minimum detectable amount (or lower limit of detection) of the NAcCAR in the plasma was 0.18 micro-Molar (µM).
• Under normal conditions, the NAcCAR concentration in horse plasma was found to be approximately 2.4 ± 0.3 µM.

These findings are pivotal in biomedical science field, especially in the analysis and understanding of metabolic activity involving NAcCAR in equine health and medicine.