Abstract: A novel hyposensitization agent was prepared by covalently attaching a saccharide to a cedar pollen allergen having a partial amino acid sequence of Ala-Ile-Asn-Ile-Phe-Asn- beginning at its N-terminal. The hyposensitization agent, when compared with an intact cedar pollen allergen, extremely accelerates the production of immunoglobulin G and M antibodies which are specific to intact cedar pollen allergen, but extremely reduces the production of immunoglobulin E antibody which is specific to the allergen. Thus, the hyposensitization agent is administrable to cedar pollinosis patients with no anaphylaxis and allergy, and cuts hyposensitization period to about 1/3 to 1/200.

Abstract: A novel hyposensitization agent was prepared by covalently attaching a saccharide, e.g. homo- and heteroglycans, for example, starch, amylose, dextran, polysucrose, pullulan, elsinan, curdlan, gum arabic, gum tragacanth, guar gum, xanthan gum carrageenan, pectin, cellulose, glucomannan, chitosan, and lipopolysaccharide, and their derivatives and partial hydrolysates to, a cedar pollen allergen. The hyposensitization agent can be administered to a cedar pollinosis patient without fear of eliciting anaphylaxis and allergy within a shortened hyposensitization period because the hyposensitization agent much more enhances the production of immunoglobulin G and M antibodies which are specific to intact cedar pollen allergen, but extremely reduces the production of immunoglobulin E antibody which is specific to the allergen and responsible for anaphylaxis and allergy.