[Effects of a lymph node extract on hemopoietic and lymphoid cells in normal state and in different forms of leukemia].

The chemical composition and properties of the lymphatic node extract (LNE) obtained from the porcine submandibular lymphatic nodes have been studied. It has been established that the LNE is the mixture of low-molecular weight peptides and the components of nucleic acids with the molecular mass below 2 kD. It possesses antiproliferative, immunosuppressive and antileukemic activities in vitro and in vivo. The inhibitory effect was the most pronounced in respect to lymphoid cells rather than myeloid cells of the patients with leukemia.