| Assay Method Information | |
| | Radioligand Binding Assay NTR1 |
| Description: | In order to determine the binding affinity of compounds comprising a radiolabel for NTR1, a radioligand binding assay was carried out. A radioligand is a radioactive biochemical substance that is used for diagnosis or for research-oriented study of cellular receptor systems of the body. In in vivo systems it is often used to quantify the binding of a test molecule to the binding site of radioligand. The higher the affinity of the molecule, the more radioligand is displaced from the binding site. The amount of bound radioligand can be measured by scintillation counting and thereby quantified. This assay is commonly used to calculate binding constants of molecules to receptors. This example shows that conjugates of the present invention bind to NTR1 with high affinity.The NTR1 radioligand binding assay was performed by Cerep (Celle l'Evescault, France; Catalog reference 0109) according to Vita et al., FEBS Lett., 1993, 317, 139-142. NTR1 was prepared from CHO cells recombinantly expressing the human receptor and incubated with 0.05 nM 125I-(Tyr3-neurotensin) and serial dilutions of the test compounds. After 60 min incubation at 4° C. and washing to remove unbound neurotensin, bound radioactivity was measured by scintillation counting. The result for each test compound is expressed as IC50 concentration and provides a measure for the affinity of the test compound for NTR1. |
| Affinity data for this assay | |
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