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BioAssay: AID 434929

SAR analysis of antagonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 3

Assay Provider: Dr. Mary Abood, Temple University, formerly at California Pacific Medical Center Research Institute ..more
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 Tested Compounds
 Tested Compounds
All(39)
 
 
Active(4)
 
 
Inactive(35)
 
 
 Tested Substances
 Tested Substances
All(39)
 
 
Active(4)
 
 
Inactive(35)
 
 
AID: 434929
Data Source: Burnham Center for Chemical Genomics (BCCG-A369-CB1-Antagonist-DryPowder-3)
BioAssay Type: Confirmatory, Concentration-Response Relationship Observed
Depositor Category: NIH Molecular Libraries Probe Production Network
BioAssay Version:
Deposit Date: 2010-05-20
Hold-until Date: 2011-03-30
Modify Date: 2011-03-31

Data Table ( Complete ):           View Active Data    View All Data
Target
BioActive Compounds: 4
Related Experiments
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AIDNameTypeProbeComment
1961Image-based HTS for Selective Agonists of GPR55Confirmatory depositor-specified cross reference
1965Summary of Image-based HTS for Selective Agonists of GPR55Summary3 depositor-specified cross reference
2338SAR analysis of Antagonists of the GPR35 Receptor using an Image-Based AssayConfirmatory same project related to Summary assay
2339SAR analysis of antagonists of the Cannabinoid Receptor 1 using an Image-Based AssayConfirmatory same project related to Summary assay
2340SAR analysis of Agonists of the GPR35 Receptor using an Image-Based AssayConfirmatory same project related to Summary assay
2341SAR analysis of agonists of the Cannabinoid Receptor 1 using an Image-Based AssayConfirmatory same project related to Summary assay
2347SAR analysis of selective Agonists of GPR55 using an Image-Based AssayConfirmatory same project related to Summary assay
2397SAR Analysis of Selective Antagonists of GPR55 using an Image-Based AssayConfirmatory same project related to Summary assay
2480SAR analysis of Antagonists of the GPR35 Receptor using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2809SAR analysis of Agonists of the GPR35 Receptor using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2814SAR analysis of agonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2820SAR Analysis of Selective Antagonists of GPR55 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2822SAR analysis of antagonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2843SAR analysis of selective Agonists of GPR55 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2844SAR analysis of agonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
434922SAR analysis of antagonists of the Cannabinoid Receptor 2 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
434924SAR analysis of Agonists of the GPR35 Receptor using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
434925SAR analysis of Antagonists of the GPR35 Receptor using an Image-Based Assay - Set 4Confirmatory same project related to Summary assay
434928SAR analysis of agonists of the Cannabinoid Receptor 2 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
463192SAR Analysis for the identification of Selective Agonists of GPR55 using an Image-Based ScreenOther same project related to Summary assay
463227SAR analysis of Antagonists of the GPR35 Receptor using an Image-Based Assay - Set 5Confirmatory same project related to Summary assay
485279SAR analysis of Agonists of GPR55 using MAPK Activation AssayOther same project related to Summary assay
2013Image-Based HTS for Selective Antagonists for GPR55Confirmatory same project related to Summary assay
2026Summary of Image-based HTS for Selective Antagonists of GPR55Summary3 same project related to Summary assay
2397SAR Analysis of Selective Antagonists of GPR55 using an Image-Based AssayConfirmatory same project related to Summary assay
2809SAR analysis of Agonists of the GPR35 Receptor using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2814SAR analysis of agonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2815SAR analysis of Antagonists of the GPR35 Receptor using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
2820SAR Analysis of Selective Antagonists of GPR55 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2822SAR analysis of antagonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
2835SAR analysis of agonists of the Cannabinoid Receptor 2 using an Image-Based AssayConfirmatory same project related to Summary assay
2836SAR analysis of antagonists of the Cannabinoid Receptor 2 using an Image-Based AssayConfirmatory same project related to Summary assay
2844SAR analysis of agonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
434922SAR analysis of antagonists of the Cannabinoid Receptor 2 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
434924SAR analysis of Agonists of the GPR35 Receptor using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
434928SAR analysis of agonists of the Cannabinoid Receptor 2 using an Image-Based Assay - Set 2Confirmatory same project related to Summary assay
463228SAR Analysis of Selective Antagonists of GPR55 using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
485277SAR analysis of agonists of the Cannabinoid Receptor 2 using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
485278SAR analysis of antagonists of the Cannabinoid Receptor 2 using an Image-Based Assay - Set 3Confirmatory same project related to Summary assay
485282SAR analysis of agonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 4Confirmatory same project related to Summary assay
485283SAR analysis of Antagonists of the GPR35 Receptor using an Image-Based Assay - Set 6Confirmatory same project related to Summary assay
485285SAR analysis of antagonists of the Cannabinoid Receptor 1 using an Image-Based Assay - Set 4Confirmatory same project related to Summary assay
485286SAR analysis of Agonists of the GPR35 Receptor using an Image-Based Assay - Set 4Confirmatory same project related to Summary assay
485287SAR Analysis of Selective Antagonists of GPR55 using an Image-Based Assay - Set 4Confirmatory same project related to Summary assay
488947SAR Analysis for the identification of Selective Antagonists of GPR55 using an Image-Based ScreenOther same project related to Summary assay
Description:
Data Source: Sanford-Burnham Center for Chemical Genomics
Source Affiliation: Sanford-Burnham Medical Research Institute (SBMRI, San Diego, CA)
Network: NIH Molecular Libraries Production Centers Network (MLPCN)
Grant Number: 1X01 DA026205-01
Assay Provider: Dr. Mary Abood, Temple University, formerly at California Pacific Medical Center Research Institute

Drug addiction is a disease that involves the G-protein coupled receptors in the central nervous system resulting in compulsive or abnormal behavior. Recent studies have shown that opioid receptors play a role in regulating other receptors that interact with drug and other substance abuse. The cannabinoid receptors (type 1 and 2) are members of the G-protein coupled receptor family and have been found to be involved in alterations in mood and cognition, as experienced by marijuana users.

The specific aim of this assay is to identify small molecule antagonists of the human cannabinoid receptor type 1 (CB1). This dose response assay is developed and performed to evaluate selectivity of hits originally identified in "Image-based HTS for Selective Agonists of GPR55" (AID 1961) and to study the structure-activity relationship on analogs of the confirmed hits. Compounds are either acquired from commercial sources or synthesized internally.

This imaging assay utilizes a cell line permanently expressing a beta-arrestin GFP biosensor and the cannabinoid receptor type 1. Upon agonist-mediated GPCR activation, the arrestin-GFP redistributes from the cytosolic compartment to the plasma membrane and further to coated pits / endosomal vesicles, which can be quantified as increased local aggregation of the GFP-arrestins.
Protocol
Assay Materials:
1) 384-well plates, black with clear bottom (Greiner# 781091)
2) U2OS (Human Osteosarcoma) cell line stably expressing the Beta-arrestin GFP and the CB1 receptor
3) Culture Media: MEM with L-glutamine, Pen-strep, 10% Fetal Bovine Serum and selection antibiotics - 200ug/ml G418 and 50ug/ml Zeocin
4) Positive Control Working Solution: WIN55212 (Sigma W102 25mg) - 5mM stock in DMSO).
5) Negative Control Working Solution: AM251 (Sigma A6226-10mg) 5mM stock in DMSO
6) Test compounds from dry powders, working solution: 10mM in 100% DMSO
7) Fixative Working Solution: 6% Paraformaldehyde (PFA) diluted in PBS.
8) Nuclear Stain Working Solution: DAPI (Invitrogen, D1306) diluted to 150ng/ml in DAPI buffer (10mM TRIS, 10mM EDTA, 100mM NaCl, pH 7.4).
Assay Procedure:
1) 45ul of cell suspension (200,000 cells/ml in culture medium) was dispensed in each well of the assay plates using a Wellmate bulk dispenser.
2) Plates are incubated overnight or approximately 20 hours at 37 degree C and 5% CO2.
3) Serum is removed by media aspiration and replaced with 45ul serum-free MEM prior to addition of compounds.
4) Compound addition was done on the ECHO550 Liquid Handler. The #dose response protocol# was used to dispense corresponding volumes of each 10mM compound on the assay plate.
a. Compounds were added to columns 3 to 22. Final concentration ranged from 62nM to 32uM (ten doses), in duplicate.
b. AM251 was added to column 1 and 24. AM251 (positive control) final concentration was 1uM.
c. DMSO was added to column 2. DMSO final concentration was 0.31%.
d. DMSO was back-filled to each well to achieve a 0.31% final concentration.
5) Plates were incubated for 30 minutes at 37 degrees C and 5% CO2.
6) After 30 minutes, WIN55212 was added to the entire plate except column 23. Final WIN55212 concentration was 1uM. Plates were incubated for another 60 minutes.
7) Media was aspirated leaving 20ul liquid in each well using a Titertek plate washer.
8) 40ul of fixative working solution was added to each well using a Wellmate bulk dispenser (Matrix) for a final concentration of 4% PFA.
9) Plates were incubated for 40 minutes at room temperature.
10) Fixative was aspirated and plates were washed twice with 50ul PBS leaving 20ul liquid in each well using a Titertek plate washer.
11) 40ul of DAPI working solution was added using a Wellmate bulk dispenser for a final DAPI concentration of 100ng/ml. Aluminum plate sealers were applied to each plate.
Image Acquisition and Analysis:
1) Image acquisition was performed on an Opera QEHS (Perkin Elmer) with 45 plate capacity loader/stacker and the following settings:
40x 0.6 NA air objective
Acquisition camera set to 2-by-2 binning for an image size of 688 by 512 pixels
2 channels acquired sequentially: Exp1Cam1 = Beta-arrestin GFP using 488 nm laser excitation and 540/70 nm emission filters, Exp2Cam2 = DAPI (nuclei) using 365 nm Xenon lamp excitation and 450/50 nm emission filters
4 fields per well
2) Image analysis was performed using the Acapella Spot Detection Algorithm.
Analysis settings:
Nuclei Detection
Threshold Adjustment: 1.5
Nuclear Individual Threshold Adjustment: 0.45
Nuclear Splitting Adjustment: 7
Minimum Nuclear Area: 70
Minimum Nuclear Distance: 7
Minimum Nuclear Contrast: 0.1
Cytoplasm Detection
Cytoplasm Threshold Adjustment: 0.2
Cytoplasm Individual Threshold Adjustment: 0.1
Spot Detection
Spot Minimum Distance 3
Spot Peak Radius 0
Spot Reference Radius 3
Spot Minimum Contrast 0.3
Spot Minimum to Cell Intensity 1
3) Metrics calculated from
Nuclei Images: Cell Count ("NumberofCellsAnalyzed"), Nuclei Area ("AreaoftheNucleus"), Integrated Intensity of the Nuclei ("TotalIntegratedIntensityoftheNucleus"), Average Intensity of the Nuclei ("AverageIntensityoftheNucleus")
GFP Images: Integrated Intensity of the Cytoplasm ("TotalCytoplasmIntensity"), Integrated Intensity of the Detected Spots ("TotalSpotIntensity"), Ratio of the Integrated Spot to Integrated Cytoplasm Intensities ("RatioofSpotIntensitytoCytoplasmintensity"), Number of Spots per Cell ("AverageSpotsPerCell"), Percentage of Cells Positive for Spot Formation ("PercentagePositiveCells")
4) The "RatioofSpotIntensitytoCytoplasmintensity" metric was used to calculate the dose response curves and parameters.
IC50 values were calculated using CBIS software (ChemInnovations) employing a sigmoidal dose-response equation through non-linear regression.
Comment
Compounds with an IC50 < 10 uM are defined as actives in the dose response confirmation.
To simplify the distinction between the inactives of the primary screen and of the confirmatory screening stage, the Tiered Activity Scoring System was developed and implemented. Its utilization for the assay is described below.
Activity Scoring
Activity scoring rules were devised to take into consideration compound efficacy, its potential interference with the assay and the screening stage that the data was obtained. Details of the Scoring System will be published elsewhere. Briefly, the outline of the scoring system utilized for the assay is as follows:
1) First tier (0-40 range) is reserved for primary screening data and is not applicable to this assay
2) Second tier (41-80 range) is reserved for dose-response confirmation data and is not applicable to this assay
3) Third tier (81-100 range) is reserved for resynthesized true positives and their analogues.
a. Inactive compounds of the confirmatory stage are assigned a score value equal 81.
b. For the remaining compounds the score is linearly correlated with a compound's inhibitory potency and, in addition, provides a measure of the likelihood that the compound is not an artifact based on the available information.
c. Summary equation that takes into account the items discussed above is
Score = 82 + 3*(pIC50 - 3),
where pIC50 is a negative log(10) of the IC50 value expressed in mole/L concentration units. This equation results in the Score values above 85 for compounds that demonstrate high potency and predictable behavior. Compounds that are inactive in the assay or whose concentration-dependent behavior are likely to be an artifact of that assay will generally have lower Score values.
Categorized Comment - additional comments and annotations
From ChEMBL:
Assay Type: Functional
Result Definitions
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TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
ScoreThe BioAssay activity ranking scoreInteger
1IC50_Mean_QualifierThis qualifier is to be used with the next TID, IC50_Mean. If qualifier is "=", the IC50 result equals the value in that column. If the qualifier is ">", the IC50 result is greater than that value. If the qualifier is "<", the IC50 result is smaller than that valueString
2IC50_Mean*IC50 value determined using sigmoidal dose response equationFloatμM
3IC50_Qualifier_1_Range1This qualifier is to be used with the next TID, IC50_1_Range1. If qualifier is "=", the IC50 result equals the value in that column. If the qualifier is ">", the IC50 result is greater than that value. If the qualifier is "<", the IC50 result is smaller than that valueString
4IC50_1_Range1IC50 value determined using sigmoidal dose response equationFloatμM
5Std.Err(IC50)_1_Range1Standard Error of IC50 valueFloatμM
6nH_1_Range1Hill coefficient determined using sigmoidal dose response equationFloat
7Excluded_Points_first_point_Range1Flags to indicate which of the first dose-response points were excluded from analysis. (1) means the titration point was excluded and (0) means the point was not excluded.String
8% inhibition at 32 uM_first_point_Range1 (32μM**)% inhibition at a given concentrationFloat%
9% inhibition at 16 uM_first_point_Range1 (16μM**)% inhibition at a given concentrationFloat%
10% inhibition at 8 uM_first_point_Range1 (8μM**)% inhibition at a given concentrationFloat%
11% inhibition at 4 uM_first_point_Range1 (4μM**)% inhibition at a given concentrationFloat%
12% inhibition at 2 uM_first_point_Range1 (2μM**)% inhibition at a given concentrationFloat%
13% inhibition at 1 uM_first_point_Range1 (1μM**)% inhibition at a given concentrationFloat%
14% inhibition at 0.5 uM_first_point_Range1 (0.5μM**)% inhibition at a given concentrationFloat%
15% inhibition at 0.25 uM_first_point_Range1 (0.25μM**)% inhibition at a given concentrationFloat%
16% inhibition at 0.125 uM_first_point_Range1 (0.125μM**)% inhibition at a given concentrationFloat%
17% inhibition at 0.0625 uM_first_point_Range1 (0.0625μM**)% inhibition at a given concentrationFloat%
18Excluded_Points_second_point_Range1Flags to indicate which of the second dose-response points were excluded from analysis. (1) means the titration point was excluded and (0) means the point was not excluded.String
19% inhibition at 32 uM_second_point_Range1 (32μM**)% inhibition at a given concentrationFloat%
20% inhibition at 16 uM_second_point_Range1 (16μM**)% inhibition at a given concentrationFloat%
21% inhibition at 8 uM_second_point_Range1 (8μM**)% inhibition at a given concentrationFloat%
22% inhibition at 4 uM_second_point_Range1 (4μM**)% inhibition at a given concentrationFloat%
23% inhibition at 2 uM_second_point_Range1 (2μM**)% inhibition at a given concentrationFloat%
24% inhibition at 1 uM_second_point_Range1 (1μM**)% inhibition at a given concentrationFloat%
25% inhibition at 0.5 uM_second_point_Range1 (0.5μM**)% inhibition at a given concentrationFloat%
26% inhibition at 0.25 uM_second_point_Range1 (0.25μM**)% inhibition at a given concentrationFloat%
27% inhibition at 0.125 uM_second_point_Range1 (0.125μM**)% inhibition at a given concentrationFloat%
28% inhibition at 0.0625 uM_second_point_Range1 (0.0625μM**)% inhibition at a given concentrationFloat%
29IC50_Qualifier_2_Range1This qualifier is to be used with the next TID, IC50_2_Range1. If qualifier is "=", the IC50 result equals the value in that column. If the qualifier is ">", the IC50 result is greater than that value. If the qualifier is "<", the IC50 result is smaller than that valueString
30IC50_2_Range1IC50 value determined using sigmoidal dose response equationFloatμM
31Std.Err(IC50)_2_Range1Standard Error of IC50 valueFloatμM
32nH_2_Range1Hill coefficient determined using sigmoidal dose response equationFloat
33Excluded_Points_third_point_Range1Flags to indicate which of the third dose-response points were excluded from analysis. (1) means the titration point was excluded and (0) means the point was not excluded.String
34% inhibition at 32 uM_third_point_Range1 (32μM**)% inhibition at a given concentrationFloat%
35% inhibition at 16 uM_third_point_Range1 (16μM**)% inhibition at a given concentrationFloat%
36% inhibition at 8 uM_third_point_Range1 (8μM**)% inhibition at a given concentrationFloat%
37% inhibition at 4 uM_third_point_Range1 (4μM**)% inhibition at a given concentrationFloat%
38% inhibition at 2 uM_third_point_Range1 (2μM**)% inhibition at a given concentrationFloat%
39% inhibition at 1 uM_third_point_Range1 (1μM**)% inhibition at a given concentrationFloat%
40% inhibition at 0.5 uM_third_point_Range1 (0.5μM**)% inhibition at a given concentrationFloat%
41% inhibition at 0.25 uM_third_point_Range1 (0.25μM**)% inhibition at a given concentrationFloat%
42% inhibition at 0.125 uM_third_point_Range1 (0.125μM**)% inhibition at a given concentrationFloat%
43% inhibition at 0.0625 uM_third_point_Range1 (0.0625μM**)% inhibition at a given concentrationFloat%
44Excluded_Points_fourth_point_Range1Flags to indicate which of the fourthsecond dose-response points were excluded from analysis. (1) means the titration point was excluded and (0) means the point was not excluded.String
45% inhibition at 32 uM_fourth_point_Range1 (32μM**)% inhibition at a given concentrationFloat%
46% inhibition at 16 uM_fourth_point_Range1 (16μM**)% inhibition at a given concentrationFloat%
47% inhibition at 8 uM_fourth_point_Range1 (8μM**)% inhibition at a given concentrationFloat%
48% inhibition at 4 uM_fourth_point_Range1 (4μM**)% inhibition at a given concentrationFloat%
49% inhibition at 2 uM_fourth_point_Range1 (2μM**)% inhibition at a given concentrationFloat%
50% inhibition at 1 uM_fourth_point_Range1 (1μM**)% inhibition at a given concentrationFloat%
51% inhibition at 0.5 uM_fourth_point_Range1 (0.5μM**)% inhibition at a given concentrationFloat%
52% inhibition at 0.25 uM_fourth_point_Range1 (0.25μM**)% inhibition at a given concentrationFloat%
53% inhibition at 0.125 uM_fourth_point_Range1 (0.125μM**)% inhibition at a given concentrationFloat%
54% inhibition at 0.0625 uM_fourth_point_Range1 (0.0625μM**)% inhibition at a given concentrationFloat%

* Activity Concentration. ** Test Concentration.
Additional Information
Grant Number: 1X01 DA026205-01

Data Table (Concise)
Data Table ( Complete ):     View Active Data    View All Data
Classification
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