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[Hepatocytes from the liver of mice with experimental post-toxic cirrhosis stimulate in heterokaryons DNA synthesis in the nuclei of resting fibroblasts of the NIH 373 line].

Hepatocytes from mouse liver with experimental post-toxic cirrhosis (received by means of 10-12 inhalations with CCl4) were fused with serum-deprived (0.2%) resting NIH 3T3 mouse fibroblasts to elucidate mechanisms of liver stroma cells proliferation at cirrhosis. After fusion, nuclei of fibroblasts in such heterokaryons were found to enter into S-period without any exogenous stimulation of cell proliferation (in the medium with low content of serum). The obtained data allow us to suggest that hepatocytes from mouse liver with experimental post-toxic cirrhosis can produce and secrete into the medium (blood) factor (s) capable of stimulating the mesenchymal origin cell proliferation.