title: Induction of circulating interferon in calves with three different types of double stranded ribonucleic acid.
abstract: Three double-stranded ribonucleic acids (dsRNA), given intravenously, were evaluated for interferon induction in calves. Groups of four calves were given an initial injection then, 24 h later, a second injection of each dsRNA material. The synthetic dsRNA, poly I.poly C, at 0.5 mg/kg stimulated serum interferon in two calves after an initial injection and in three calves after a second dose, whereas a natural dsRNA (BRL 5907) at 0.5 mg/kg induced interferon in only one calf after both injections. A polyquaternary ammonium complex (BRL 10739) of natural dsRNA, at 0.1 mg/kg, induced interferon in all four calves after a single injection and circulating interferon persisted longer than with the other two dsRNA materials.
mesh_terms: D000818:Animals; D002417:Cattle / Q000097:blood*; D007372:Interferons / Q000096:biosynthesis*; D008297:Male; D011070:Poly I-C / Q000494:pharmacology; D012330:RNA, Double-Stranded / Q000494:pharmacology*
chemical_list: D012330:RNA, Double-Stranded; D007372:Interferons; D011070:Poly I-C