In a search for high-affinity receptor ligands that might serve for development as radioligands for the imaging of brain 5-HT(4) receptors in vivo with positron emission tomography (PET), structural modifications were made to the high-affinity 5-HT(4) antagonist (1-butylpiperidin-4-yl)methyl 8-amino-7-iodo-2,3-dihydrobenzo[b][1,4]dioxine-5-carboxylate (1, SB 207710). These modifications were made more ..
Related BioAssays
Related BioAssays
Target
BioActive Compound: 1
Description:
Title: Synthesis, structure-affinity relationships, and radiolabeling of selective high-affinity 5-HT4 receptor ligands as prospective imaging probes for positron emission tomography.
Abstract: In a search for high-affinity receptor ligands that might serve for development as radioligands for the imaging of brain 5-HT(4) receptors in vivo with positron emission tomography (PET), structural modifications were made to the high-affinity 5-HT(4) antagonist (1-butylpiperidin-4-yl)methyl 8-amino-7-iodo-2,3-dihydrobenzo[b][1,4]dioxine-5-carboxylate (1, SB 207710). These modifications were made mainly on the aryl side of the ester bond to permit possible rapid labeling of the carboxylic acid component with a positron emitter, either carbon-11 (t(1/2) = 20.4 min) or fluorine-18 (t(1/2) = 109.7 min), and included (i) replacement of the iodine atom with a small substituent such as nitrile, methyl, or fluoro, (ii) methylation of the 8-amino group, (iii) opening of the dioxan ring, and (iv) alteration of the length of the N-alkyl goup. High-affinity ligands were discovered for recombinant human 5-HT(4) receptors with amenability to labeling with a positron emitter and potential for development as imaging probes. The ring-opened radioligand, (([methoxy-(11)C]1-butylpiperidin-4-yl)methyl 4-amino-3-methoxybenzoate; [(11)C]13), showed an especially favorable array of properties for future evaluation as a PET radioligand for brain 5-HT(4) receptors.
(PMID: 20812727)
Abstract: In a search for high-affinity receptor ligands that might serve for development as radioligands for the imaging of brain 5-HT(4) receptors in vivo with positron emission tomography (PET), structural modifications were made to the high-affinity 5-HT(4) antagonist (1-butylpiperidin-4-yl)methyl 8-amino-7-iodo-2,3-dihydrobenzo[b][1,4]dioxine-5-carboxylate (1, SB 207710). These modifications were made mainly on the aryl side of the ester bond to permit possible rapid labeling of the carboxylic acid component with a positron emitter, either carbon-11 (t(1/2) = 20.4 min) or fluorine-18 (t(1/2) = 109.7 min), and included (i) replacement of the iodine atom with a small substituent such as nitrile, methyl, or fluoro, (ii) methylation of the 8-amino group, (iii) opening of the dioxan ring, and (iv) alteration of the length of the N-alkyl goup. High-affinity ligands were discovered for recombinant human 5-HT(4) receptors with amenability to labeling with a positron emitter and potential for development as imaging probes. The ring-opened radioligand, (([methoxy-(11)C]1-butylpiperidin-4-yl)methyl 4-amino-3-methoxybenzoate; [(11)C]13), showed an especially favorable array of properties for future evaluation as a PET radioligand for brain 5-HT(4) receptors.
(PMID: 20812727)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.
Categorized Comment
ChEMBL Assay Type: Binding
ChEMBL Assay Data Source: Scientific Literature
ChEMBL Target ID: 10624
ChEMBL target type: Target is a single protein chain
ChEMBL Assay Data Source: Scientific Literature
ChEMBL Target ID: 10624
ChEMBL target type: Target is a single protein chain
Result Definitions
Show more |
| TID | Name | Description | Histogram | Type | Unit | |
|---|---|---|---|---|---|---|
| Outcome | The BioAssay activity outcome | Outcome | ||||
| 1 | Ki* | Ki PubChem standard value |  | Float | μM | |
| 2 | BEI | Binding Efficiency Index(nM) | | Float | ||
| 3 | SEI | Surface Efficiency Index(nM) | | Float | ||
| 4 | Ki activity comment | Ki activity comment | String | |||
| 5 | Ki standard flag | Ki standard flag | | Integer | ||
| 6 | Ki qualifier | Ki qualifier | String | |||
| 7 | Ki published value | Ki published value | | Float | nM | |
| 8 | Ki standard value | Ki standard value | | Float | nM | |
| 9 | Ki binding domains | Ki binding domains | String |
* Activity Concentration.
Data Table (Concise)
Classification
PageFrom: