[Study of the action of immunomodulator T-activin on electric properties of plasma membranes of thymus cells by the use of fluorescent probes].

T-activin alters the electric properties of plasmatic membranes of the T-activin treated suspension of mouse (CBAX X057B1) F1 thymic cells. These alterations were registered by means of negative charged fluorescent probe l-anilino-naphthalene-8-sulfonate (ANS) and positive charged 4-(p-dimethylaminostyryl)-1-methylpyridinium (DSM) by measurement of their fluorescence in the individual thymic cell. Apparently, T-activin leads to depolarization of transmembrane potential on plasmatic membrane of thymic cells. It seems that action of T-activin is similar to the effect of polycations, which alter cells ionic streams during lymphocyte activation. However, there is a version, that T-activin acts like neuraminidase, but it is activity less expressed.