[Effects of the fraction (1-10 kDa) of the brain of a Yakut horse on kinetic parameters of Ca2+ transport system in sarcolemma vesicles of cardiomyocytes].

This research investigates the impact of a specific protein fraction obtained from the brain of the Yakut horse, a cold-adapted animal, on calcium transport in heart cell membranes. The study suggests that the use of this fraction could decrease the concentration of calcium within cells.

Introduction and Methodology

• The research focuses on a specific protein fraction, referred to as 1-10 kDa, which is obtained from the brain of a Yakut horse, a species adapted to cold climates. The goal is to investigate how this fraction impacts calcium (Ca2+) transport in sarcolemma vesicles, which are components of heart muscle cells (cardiomyocytes).
• In order to analyze the effect of this fraction, it was inserted into an incubation medium, creating different concentrations ranging from 10(-9) M to 3.10(-5) M. The substrate concentration for Ca2+ transport varied from 0.1 mM to 3.0 mM.

Results

• The research observed that there’s a minor increase in the rate of passive calcium penetration into vesicles when the protein fraction from Yakut horse brain was present and the calcium transport substrate concentration ranged from 0.1 to 1.0 mM.
• However, when the Ca2+ transport substrate concentration was increased to a physiological level of 3 mM, the presence of the Yakut horse brain fraction resulted in a decrease in the rate of Ca2+ penetration.
• When focusing on active Ca2+ transport, the presence of the Yakut horse brain fraction showed increased calcium accumulation rates by the vesicles compared to control scenarios. This was observed for all tested concentrations of the protein fraction (1-10 kDa) at calcium concentrations in the incubation medium ranging from 10(-7) to 3.10(-6) M.

Conclusion

• The findings suggest the application of the Yakut horse brain fraction has a direct impact on calcium transport in heart cell membranes.
• The most significant outcome points to a decrease in intracellular calcium concentration when the protein fraction (1-10 kDa) of the Yakut horse brain is applied.
• This research could lead to further investigations into the potential benefits and uses of this protein fraction in the medical field, in particular concerning conditions related to calcium regulation in cardiomyocytes.