Evidence that diclofenac and celecoxib are thyroid hormone receptor beta antagonists

Life Sciences
Mire ZlohLouise S Mackenzie

Abstract

Long term use of NSAIDs is linked to side effects such as gastric bleeding and myocardial infarction. Use of in silico methods and pharmacology to investigate the potential for NSAIDs diclofenac, celecoxib and naproxen to bind to nuclear receptors. In silico screening predicted that both diclofenac and celecoxib has the potential to bind to a number of different nuclear receptors; docking analysis confirmed a theoretical ability for diclofenac and celecoxib but not naproxen to bind to TRβ. Results from TRβ luciferase reporter assays confirmed that both diclofenac and celecoxib display TRβ antagonistic properties; celecoxib, IC50 3.6×10(-6)M, and diclofenac IC50 5.3×10(-6)M, comparable to the TRβ antagonist MLS (IC50 3.1×10(-6)M). In contrast naproxen, a cardio-sparing NSAID, lacked TRβ antagonist effects. In order to determine the effects of NSAIDs in whole organ in vitro, we used isometric wire myography to measure the changes to Triiodothyronine (T3) induced vasodilation of rat mesenteric arteries. Incubation of arteries in the presence of the TRβ antagonist MLS000389544 (10(-5)M), as well as diclofenac (10(-5)M) and celecoxib (10(-5)M) but not naproxen significantly inhibited T3 induced vasodilation compared to controls. The...Continue Reading

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Citations

Jan 5, 2019·Journal of Molecular Endocrinology·Sogol GachkarJens Mittag
Apr 11, 2019·Brazilian Dental Journal·Marcella Goetz MoroMarinella Holzhausen
Jan 16, 2021·Journal of Chemical Information and Modeling·André FischerMartin Smieško

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