Dupont A, Coy D H, Alvarado-Urbina G, Côté J, Meyers C A, McManus J, Barden N, De Léan A, Labrie F
Clin Endocrinol (Oxf). 1979 Jan;10(1):47-54. doi: 10.1111/j.1365-2265.1979.tb03032.x.
A sensitive radioimmunoassay for somatostatin using N-[125I]-Tyr-somatostatin is described and compared with that using [125I]-Tyr1-somatostatin. The minimum detectable amount of somatostatin using N-[125I]-Tyr-somatostatin as tracer was 0.1 to 0.5 pg, which is approximately 10-fold lower than the lower detection limit of the RIA using [125I]-Tyr1-somatostatin. Moreover, it was found that the shelf-life of N[125I]Tyr-somatostatin was prolonged in comparison with labelled Tyr1-somatostatin. Human pancreatic and gastric extracts displayed immunological similarity to synthetic somatostatin tetradecapeptide.
