Differences in serum protein 2D gel electrophoresis patterns of Przewalski’s (Mongolian wild horse) and thoroughbred horses.

This research study aimed to compare the serum protein expression profiles of Przewalski’s (Mongolian wild horse) and thoroughbred horses by analysing the differences in protein products. The study identified two proteins (tetraspanin-18 and pM5) that were more prevalent in Przewalski’s horses and three proteins (a haptoglobin-2 alpha glycoprotein and two haptoglobin-2beta glycoproteins) that were less prevalent compared to thoroughbred horses.

Methods Used in the Study

• The study utilized proteome analysis, a technique used to study the entire set of proteins that are produced or modified by an organism. This analysis was conducted to compare the protein expression profiles of the two types of horses.
• The serum proteins were separated using a technique known as two-dimensional electrophoresis (2-DE). This process allows for the separation of complex mixtures of proteins on the basis of two distinct properties: their isoelectric point and their molecular weight.
• Five distinct protein gene products were identified from the mix. These proteins were identified by matrix-assisted laser desorption ionization-time-of-flight (MALDI-TOF) mass spectrometry, a method that allows for the identification and characterization of molecules based on their mass and charge. The identities of the proteins were deduced from their similarity to proteins found in the human plasma protein database.

Findings of the Study

• Three proteins – a haptoglobin-2 alpha glycoprotein and two haptoglobin-2beta glycoproteins with different identification numbers – were found in lower quantities in the serum of Przewalski’s horses compared to thoroughbred horses.
• Two proteins – tetraspanin-18 and pM5 – were found in higher quantities in the serum of Przewalski’s horses compared to thoroughbred horses.
• These differences in protein expression suggest that the two types of horses may possess different metabolic or immune processes. The haptoglobin-2 alpha and haptoglobin-2beta proteins in particular could be useful in future studies involving inflammation, coagulation, immune modulation, and pro-antioxidant and anti-oxidant activity. These proteins may influence the entire metabolism of the horse.