[Changes in various biochemical indices and ultrastructure of ascites tumors after combined administration of cyclophosphamide and levorin].

The fractional composition of chromatin proteins and an electron-microscopic pattern of cell ultrastructure of the Ehrlich ascite tumours and ascite lymphoma NK/Ly were studied when suppressing their growth by a combined action of cyclophosphane and polyene antibiotic. Changes in the fractional composition of chromatin proteins were found under the effect of levorin. A sharp increase in this effect and summation of heterogeneous morphological changes provoked by each of the preparation occur under a combined application of the preparations.

[Characteristics of the ultrastructural alteration in ascitic lymphoma NK/Ly cells as affected by cyclophosphane].

The ultrastructure of cells of mouse ascites lymphoma was studied by transmission electron microscopy. It was established that cyclophosphamide treatment (6 days) reduces cell concentration in ascitic fluid and alters tumor cell ultrastructure. Apart from dystrophic and necrotized ones, there are cells exhibiting the signs of active protein synthesis.