Preparation and biological properties of water-soluble adjuvant fractions from delipidated cells of Mycobacterium smegmatis and Nocardia opaca.
Digestion by lysozyme of delipidated cells of Mycobacterium smegmatis liberates a water-soluble immunoadjuvant fraction which is chemically very similar to the water-soluble adjuvant (WSA) obtained previously from purified cell walls, but which contains somewhat more non-peptidoglycan amino acids. The yield of peptidoglycan-arabinogalactan complex is about 10 times greater starting from whole cells than from cell walls. The main biological properties of this "neo-WSA" are described: it increases circulating antibodies to ovalbumin in guinea pigs, it does not produce polyarthritis in rats or induce hypersensitivity to tuberculin, it does not increase susceptibility to histamine or hyperreactivity to endotoxin, and does not produce spleen and liver hypertrophy. Analogous immunostimulant fractions have also been obtained from delipidated cells of Nocardia opaca by lysozyme treatment.
14 references, click to expand
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