[Total protein content of cells as a factor regulating their proliferation].

Proliferation kinetics in stimulated stationary cultures of chick embryo fibroblasts was studied using cytophotometric and autoradiographic methods. Part of 4c cells are blocked at G2 when the culture becomes stationary. A fraction is formed among them which fails to divide in response to proliferation stimulus.

[DNA content and synthesis in the nuclei of rat cerebellar cells in organotypic cultures].

Using cytophotometric and autoradiographic methods, it has been shown for the first time that in condition of an organotypic culture the replicative synthesis of DNA is induced in the Purkinje neurons of the cerebellum of newborn rats completing their terminal differentiation. This synthesis is accompanied by polyploidization of the initially diploid population of these cells (4c, much more rarely 8c, and a single 16c cell appear) rather than by cell division. In constant, the granular cells mostly retain their diploid state and only a few of them synthesize DNA to H2c values.

[In vitro culture of the hypothalamic supraoptic nucleus. I. General morphological characteristics].

Kinetics and morphology of supraoptic nuclei (SON) organ culture of newborn rat hypothalamus have been described. Explants of SON were cultured for 7-90 days. Cell migration, growth of neuron sprouts, formation of nerve bundles and growth zone, and mitotic activity were followed.

[Serotypes of herpes simplex virus and their association with cervical cancer].

Comparative studies of some properties of Herpes simplex viruses type I and II and their ability to reproduce latent infection in vitro revealed no essential differences between them. Virus-neutralizing and hemagglutinating antibodies to the virus type II are detected reliably more frequently in cervical cancer patients than in healthy ones. Forty six per cent of cervical cancer patients and thirty nine per cent of healthy females along with antibodies against the virus of serotype II showed a specific cellular response, which was demonstrated in the reaction of leucocyte migration inhibition.