Cell experiment:

Powder forms of Mefenamic acid, indometacin, aspirin, and celecoxib are dissolved in 0.1% dimethyl sulfoxide (DMSO) to achieve a concentration of 100 μM of stock solution, which is sterilized by filtration through a 0.22-μm filter and then stored at 4℃. Different concentrations (100, 50, 25, 10, and 5 μM) of the drugs (Mefenamic acid, etc.) are prepared by serial dilutions with the FCS-free medium or the medium containing 10% FCS in sterile plastic centrifuge tubes[2].

Mefenamic acid is a non-steroidal anti-inflammatory agent, acting as a competitive inhibitor of hCOX-1 and hCOX-2, with IC50s of 40 nM and 3 μM for hCOX-1 and hCOX-2, respectively.

Mefenamic acid is a non-steroidal anti-inflammatory agent, acting as a competitive inhibitor of hCOX-1, with IC50s of 40 nM and 3 μM for hCOX-1 and hCOX-2, respectively[1]. Mefenamic acid (0-100 μM) has cytotoxic effects on KB, Saos-2, and 1321N cells, however, U-87MG cells are resistant to Mefenamic acid[2].

References:
[1]. Gierse JK, et al. Expression and selective inhibition of the constitutive and inducible forms of human cyclo-oxygenase. Biochem J. 1995 Jan 15;305 (Pt 2):479-84.
[2]. Hashemipour MA, et al. In Vitro Cytotoxic Effects of Celecoxib, Mefenamic Acid, Aspirin and Indometacin on Several Cells Lines. J Dent (Shiraz). 2016 Sep;17(3):219-25.