The influence of platelet concentrate on the development of cattle embryos in аn in vitro system

There are many studies on the improvement of the conditions for cultivating bovine embryos in vitro. However, the issue of co-cultivation of platelets and cow embryos is understudied, although platelet activation leads to the release of a considerable amount of biologically active substances into the culture medium and their co-cultivation with embryos can positively affect the growth and development of the latter. Therefore, the purpose of this study was to investigate the effect of different platelet concentrations in the in vitro culture system on the development of cow embryos. Fertilized zygotes (total number 180) were divided into 5 groups: Group 1 – culture medium without platelet addition (control); Group 2 – medium for cultivation with the addition of 10×106 platelets/cm3 ; Group 3 – final concentration in the system is 20×106 platelets/cm3 ; Group 4 – 50×106 platelets/cm3 ; Group 5 – 100×106 platelets/cm3 . According to the results, it was found that co-cultivation of embryos with platelets in the in vitro system is effective. Thus, a correlation was found between improved embryo development indicators and an increase in platelet concentration. The optimal platelet concentration was 50×106 /cm3 , which allowed obtaining a 13.9% higher level of blastulation, 15.7% higher average embryo size, and 2.5% higher average number of cells in the blastocyst compared to the control. At the same time, the platelet concentration of 100×106 /cm3 led to a significant decrease in the indicators under study, compared with the group without platelets. Therefore, co-cultivation of cow embryos with platelets is advisable since it allows improving the development indicators of cow embryos. The data analysed and presented in this paper will increase the efficiency of cultivation of bovine embryos for both scientific and industrial purposes