[Effect of chorionic gonadotropin on the cooperative interrelations of splenocytes involved in the primary immune response].

The influence of chorionic gonadotropin (CG) on the interaction of spleen T- and B-cells has been studied in adoptive transfer system. It has been established that CG increases the primary immune response in non-ovariectomized mice. This effect reversely depended on the hormone concentration and was independent of prostaglandins (PG).

[Relation between interleukin-2 production and the time of irradiation and mitogenic lymphocyte activation].

The effect of radiation on the production of interleukin 2 by activated lymphocytes was shown to be a function of time interval between irradiation and mitogen stimulation of cells. The most intensive production of interleukin 2 was noted in cells exposed 24 h following the effect of the mitogen. The enhancing effect of in vivo irradiation was less pronounced.

Experiments with micro-organisms and human cell cultures in the Zond 5 and Zond 7 flights.

Lysogenic strains of Escherichia coli were exposed to space conditions aboard the flight of Zond 5 and Zond 7. Space flight factors appeared to affect the state of episome systems of bacteria, as judged by data obtained with F-Lac+ donor cells which also carried genetic markers for threonine and leucine. Observations on phage induction are discussed and compared with results obtained aboard Biosatellite 2.