EFFECTS OF A 1600M LONG TROTTING RACE ON SERUM-PROTEINS, LIPOPROTEINSAND LIPIDS IN STANDARD-BRED HORSES

The evaluation of total concentrations of proteins, lipoproteins and l ipids together with the relative contribution of their fractions in se rum was performed in six healthy trotters before and immediately after a 1600 metres long race. The results obtained demonstrated a signific ant increase of the total protein level in the post-race serum samples . The relative contribution of the separated protein fractions i. e. a lbumin, alpha, beta and gamma globulins was similar in the resting and in the post-race samples. The levels of total lipoproteins, cholester ol and phospholipids increased significantly after the race. Agarose g el electrophoresis separated serum lipoproteins into four fractions: p re-alpha, alpha, pre-beta and beta. The alpha lipoproteins were the ma jor fraction in the horse sera. The relative amount of the pre-alpha l ipoproteins was increased while beta lipoproteins decreased in the ser um samples obtained after the race.