A sensitive and specific radioimmunoassay for leukotriene C4.
A sensitive and specific radioimmunoassay suitable for direct measurement of leukotriene C4 was developed. Acetylated leukotriene C4 was coupled to polyamino bovine serum albumin using 1-ethyl-3-(3-dimethylamino-propyl) carbodiimide hydrochloride as coupling agent. The conjugate in complete or incomplete Freund's adjuvant was injected into New Zealand white rabbits. At a final antiplasma dilution of 1 : 1050 the lowest detection limit of leukotriene C4 was 0.046 pmol. The antiplasma cross-reacted less than 1% with leukotrienes D4, E4 and F4, while high relative cross-reaction (86-100%) was obtained with leukotrienes C3, C5 and 11-trans leukotriene C4. In experiments where known amounts of leukotriene C4 were added to leukocyte suspensions, 67-100% of the added amount was recovered by the method. The radioimmunoassay was used to study leukotriene C4 formation after stimulation of leukocyte suspensions with the ionophore A23187.
D000918:Antibody Specificity; D000001:Calcimycin / Q000494:pharmacology; D002478:Cells, Cultured; D006801:Humans; D009504:Neutrophils / Q000378:metabolism; D011863:Radioimmunoassay / Q000379:methods; D013189:SRS-A / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology*
D013189:SRS-A; D000001:Calcimycin