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• W2085878653 abstract "Corticotropin-releasing factor (CRF) receptors type 1 (CRF(1)) and type 2 (CRF(2)) differ from each other in their pharmacological properties. The human and ovine CRF versions bind to CRF(1) receptors with significantly higher affinity than to CRF(2) receptors. Recently antisauvagine-30, an N-terminally truncated version of the CRF analog sauvagine, was characterized as a specific antagonist to mouse CRF(2B). We have synthesized the radiolabeled version (125)I-antisauvagine-30 and tested it for its affinity at human CRF(1) (hCRF(1)), hCRF(2A), Xenopus CRF(1) (xCRF(1)) and xCRF(2) receptors. In control binding studies (125)I-labeled hCRF, sauvagine and astressin were also bound to these receptors. (125)I-antisauvagine-30 exclusively bound to hCRF(2A) and xCRF(2) but not to hCRF(1) and xCRF(1) receptors. (125)I-antisauvagine-30 binding to hCRF(2A) and xCRF(2) receptors was saturable and of high affinity (hCRF(2A): K(d)=125 pM; xCRF(2): K(d)=1.1 nM). In displacement binding experiments using (125)I-antisauvagine-30 as radioligand several CRF analogs bound to hCRF(2A) and xCRF(2) receptors with similar rank orders as reported with other CRF radioligands. Finally, preliminary studies using (125)I-antisauvagine-30 binding to membrane homogenates prepared from different rat brain structures showed that the peptide bound specifically to brain areas expressing CRF(2) receptors. These data demonstrate that (125)I-antisauvagine-30 is the first high-affinity ligand to specifically label CRF(2) receptors." @default.
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• W2085878653 date "2001-01-01" @default.
• W2085878653 modified "2023-10-13" @default.
• W2085878653 title "125I-Antisauvagine-30: a novel and specific high-affinity radioligand for the characterization of corticotropin-releasing factor type 2 receptors" @default.
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• W2085878653 doi "https://doi.org/10.1016/s0028-3908(00)00105-2" @default.
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