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Assay Method Information

Assay Name:  ET-1 Assay
Description:  Fibroblasts (primary human lung and dermal, HFL-1, 3T3 etc) are seeded in 96-well plates at ~15000 cells/well and serum starved for 0-48 hours. After media exchange, compounds serially diluted in DMSO are added to the cells. After a brief incubation of ~30 min, stimulants (TGFb, serum, LPA etc) are added followed by further incubation for 16-48 hours. Media is then harvested and stored frozen in plate format for later endothelin-1 (ET-1) determination by ELISA. Toxicity measurements are made using the ATPlite kit (Perkin-Elmer). ET-1 is quantified using an ELISA kit (R&D Systems). The amount of ET-1 produced in the assay wells are back-calculated using the ELISA standard. The ability of a compound to inhibit ET-1 production is typically analyzed by fitting dose-response curves to a 4-parameter logistic function to obtain an EC50 value.
Affinity data for this assay
 

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Last update November 1, 2007
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