Argon

Argon has neuroprotective properties. The effect is not well understood, but it appears that argon mediates significant reduction of TLR2 and TLR4 receptor density and protein expression [6]. Another experiment showed that argon in the mixture argon 74%, CO₂ 5%, O₂ 21%) relaxed the pulmonary circulation. GABA-receptors appear to be involved in this [5].

Argon has been shown to have antiapoptotic activity by inhibiting the apoptotic activation of caspase-3 [7].

The growth of Escherichia coli, Saccharomyces cerevisiae, and Tetrahymena thermophila is not inhibited by Ar(g) under hydrostatic pressure, but can in fact reverse the growth inhibitory action of hydrostatic pressures [8].