[Release of the nucleoli and karyoplasm into the cytoplasm of reticular cells in lymph node cultures].

Successive stages of the process characterizing the release of the nucleoli and part of the nuclei contents into the reticular cell cytoplasm were recorded in the primary cultures of the lymph nodes of albino mice with transplantable leukemia. Comparison of the results obtained with the autoradiographic data pointing to the high proliferative and metabolic activity of the reticular cells permits a suggestion that the recorded phenomenon reflected the secretory function of the stroma cells of the hemopoietic organs at the morphological level.