Features of Erythrocyte Cytoarchitectonics Pelophylax ridibunda at Temperature Load in vitro Experiments

Morphometric and biophysical properties of erythrocytes of the marsh frog Pelophylax ridibunda Pall. incubated at different temperatures in vitro experiments were studied using atomic force microscopy. It was found that a decrease in the incubation temperature (to 5°C) does not cause changes in the morphometric parameters of the cells, while an increase in the incubation temperature (to 40°C) contributes to a decrease in the above-mentioned parameters compared to incubation at the control temperature (20°C). With a decrease and increase in the incubation temperature compared to the control temperature, an increase in the number of globular protrusions on the surface of erythrocytes and an increase in their height are observed. At decreased and increased incubation temperatures, an increase in the number and an increase in the diameter of depressions on the surface of erythrocytes, as well as a decrease in the depth of protrusions are observed. A decrease in the incubation temperature does not cause changes in the morphometric parameters of erythrocytes compared to incubation at the control temperature, whereas under conditions of an increased incubation temperature, these parameters significantly decrease. Incubation of erythrocytes at a temperature of 40°C contributes to a decrease in the volume and area compared to the control temperature. When the incubation temperature is reduced to 5°C, the Young’s modulus of nucleated erythrocytes increases compared to the control temperature; incubation of nucleated erythrocytes at a temperature of 40°C causes an insignificant change in this indicator compared to the control. Adhesion of the nucleated erythrocyte membrane to the nanoprobe increases after incubation at a temperature of 5°C and decreases after incubation at a temperature of 40°C. The study found that under the influence of the temperature factor, adaptive changes occur in the physiological properties of the plasma membrane and morphometric parameters of the cells.