The effects of nucleic acids on homograft tolerance

Therapeutic Effects of Ribunucleinate (Ribonucleotides) in Immuno-Inflammatory and Arthritic Diseases

Ribonucleic acids from different organs and from yeast have been used for the treatment of chronic and degenerative diseases in the context of naturopathic medicine in the last 60 years. This chapter provides general information about ribonucleinates as therapeutic agents. Past and present pharmacological and clinical investigations are discussed in the field of the central nervous system, sensory organs, cancer and degenerative diseases of joints and vertebra.

Experimental Salmonellosis VI. In Vitro Transfer of Cellular Immunity of Mouse Mononuclear Phagocytes

Saito, Kazuko (Gunma University, Maebashi, Japan), and Susumu Mitsuhashi. Experimental salmonellosis. VI. In vitro transfer of cellular immunity of mouse mononuclear phagocytes. J. Bacteriol. 90:629-634. 1965.-A culture medium of the mononuclear phagocytes (monocytes) of mice immunized with live vaccine of Salmonella enteritidis contains the transfer agent (TA) of cellular immunity from immune to non-immune monocytes. The TA is of ribonucleic acid nature, is nondialyzable through cellophane, and maintains its active state for 3 months in a frozen state (-10 C) and for 24 hr at 37 C.

Appearance of radioactivity in mouse cells after administration of labeled macromolecular RNA

Although various induced effects have been reported to follow administration of ribonucleic acid, direct evidence of cellular uptake has been lacking. Radioautographic evidence is presented of incorporation of label from radioactive macromolecular RNA presented to normal and neoplastic mouse cells. Although most of the label appeared in cellular RNA, deoxyribonucleic acid also was occasionally labeled. This suggested that at least partial degradation of the RNA occurred prior to or after incorporation.

STUDIES OF TUBERCLE BACILLUS-HISTIOCYTE RELATIONSHIPS. VI. INDUCTION OF CELLULAR RESISTANCE BY RIBOSOMES AND RIBOSOMAL RNA

The various cellular components of immune rabbit histiocytes have been analyzed for their ability to induce cellular resistance in normal animals. The results of these investigations have shown that the nuclear and mitochondrial fractions were inactive and that the microsomal and ribosomal fractions were active. The importance of ribonucleic acid in induction of cellular resistance was established by isolation of an active ribosomal RNA and by demonstration of inactivation of this material with ribonuclease but not with deoxyribonuclease or trypsin. The possibility that viable bacilli were present in immune ribosomes was tested; the absence of complement-fixing antibodies and of skin reactivity to tuberculin in animals inoculated with ribosomes was considered as partial evidence of absence of living bacilli.