Bookmark and Share
BioAssay: AID 199943

Transcriptional activation of CV-1 cells expressing murine Retinoid X receptor RXR gamma

A class of less toxic retinoids, called heteroarotinoids, was evaluated for their molecular mechanism of growth inhibition of two head and neck squamous cell carcinoma (HNSCC) cell lines SCC-2 and SCC-38. A series of 14 heteroarotinoids were screened for growth inhibition activity in vitro. The two most active compounds, one that contained an oxygen heteroatom (6) and the other a sulfur more ..
_
   
 Tested Compounds
 Tested Compounds
All(2)
 
 
Active(2)
 
 
 Tested Substances
 Tested Substances
All(2)
 
 
Active(2)
 
 
 Related BioAssays
 Related BioAssays
AID: 199943
Data Source: ChEMBL (197217)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2010-05-24
Modify Date: 2013-11-15

Data Table ( Complete ):           Active    All
Target
Sequence: RecName: Full=Retinoic acid receptor RXR-gamma; AltName: Full=Nuclear receptor subfamily 2 group B member 3; AltName: Full=Retinoid X receptor gamma
Description ..   
Protein Family: The ligand binding domain of the retinoid X receptor and Ultraspiracle, members of nuclear receptor superfamily
Comment ..   

Gene:RXRG     Related Protein 3D Structures     More BioActivity Data..
BioActive Compounds: 2
Description:
Title: Heteroarotinoids inhibit head and neck cancer cell lines in vitro and in vivo through both RAR and RXR retinoic acid receptors.

Abstract: A class of less toxic retinoids, called heteroarotinoids, was evaluated for their molecular mechanism of growth inhibition of two head and neck squamous cell carcinoma (HNSCC) cell lines SCC-2 and SCC-38. A series of 14 heteroarotinoids were screened for growth inhibition activity in vitro. The two most active compounds, one that contained an oxygen heteroatom (6) and the other a sulfur heteroatom (16), were evaluated in a xenograph model of tumor establishment in nude mice. Five days after subcutaneous injection of 10(7) SCC-38 cells, groups of 5 nu/nu mice were gavaged daily (5 days/week for 4 weeks) with 20 mg/kg/day of all-trans-retinoic acid (t-RA, 1), 10 mg/kg/day of 6, 10 mg/kg/day of 16, or sesame oil. After a few days, the dose of t-RA (1) was decreased to 10 mg/kg/day to alleviate the side effects of eczema and bone fracture. No significant toxic effects were observed in the heteroarotinoid groups. All three retinoids caused a statistically significant reduction in tumor size as determined by the Student t-test (P < 0. 05). Complete tumor regression was noted in 3 of 5 mice treated with t-RA (1), 4 of 5 mice treated with 16, 1 of 5 mice treated with 6, and 1 of 5 mice treated with sesame oil. Reverse transcriptase polymerase chain reaction (RT-PCR) was used to determine that the expression levels of RARalpha, RXRalpha, and RXRbeta were similar in the two cell lines, while RARbeta expression was higher in SCC-2 over SCC-38, and RARgamma expression was higher in SCC-38 over SCC-2. Receptor cotransfection assays in CV-1 cells demonstrated that 16 was a potent activator of both RAR and RXR receptors, while 6 was selective for the RXR receptors. Transient cotransfection assays in CV-1 cells using an AP-1 responsive reporter plasmid demonstrated that t-RA (1), 6, and 16 each inhibited AP-1-driven transcription in this cell line. In conclusion, the growth inhibition activity of the RXR-selective 6 and the more potent growth inhibition activity of the RAR/RXR pan-agonist 16 implicate both RARs and RXRs in the molecular mechanism of retinoid growth inhibition. Moreover, the chemoprevention activity and the lack of toxicity of heteroarotinoids demonstrate their clinical potential in head and neck cancer chemoprevention.
(PMID: 10543887)
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 Assay Cell Type: CV-1

ChEMBL Target ID: 12793

ChEMBL Target Type: Target is a single protein chain

Result Definitions
Show more
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1EC50*EC50 PubChem standard valueFloatμM
2BEIBinding Efficiency Index(nM)Float
3SEISurface Efficiency Index(nM)Float
4LELigand EfficiencyFloat
5LLELipophilic Ligand EfficiencyFloat
6EC50 activity commentEC50 activity commentString
7EC50 standard flagEC50 standard flagInteger
8EC50 qualifierEC50 qualifierString
9EC50 published valueEC50 published valueFloatnM
10EC50 standard valueEC50 standard valueFloatnM
11EC50 binding domainsEC50 binding domainsString

* Activity Concentration.

Data Table (Concise)
Classification
PageFrom: