title: [Anticomplement activity of native dextrans].
abstract: An anticomplementary activity of native dextrans of various structure was studied among the nine dextrans studied, eight polymers exhibited the anticomplementary activity of variable magnitude; only one dextran, containing 95% of 1--6 links and 2% of 1--2 links was unactive. The highest activity was exhibited by dextrans with high content of 1--2 links; lower activity was observed in dextrans, containing high amount of 1--3 links. The anticomplementary activity was not found in partially hydrolyzed dextrans, containing 90% and more links of the 1--6 type, with molecular weight of 2-10(6) daltons and lower. Polyaldehydes, obtained from these dextrans by oxidation with iodic acid, acquired the anticomplementary activity, comparable with the activity of native dextrans.
mesh_terms: D000818:Animals; D003169:Complement Inactivator Proteins; D003911:Dextrans / Q000276:immunology*; D006168:Guinea Pigs; D011817:Rabbits
chemical_list: D003169:Complement Inactivator Proteins; D003911:Dextrans
vernacular_title: Antikomplementarnaia aktivnost' nativnykh dekstranov.