Pregnenolone monosulfate sodium salt is the sodium salt form of Pregnenolone monosulfate.Pregnenolone monosulfate is an endogenous neurosteroid, enhances NMDA receptor-mediated synaptic activity and intracellular Ca²⁺ concentrations, activates CREB phosphorylation, activates TRPM3 channels, and may inhibit GABA A receptors.

Pregnenolone monosulfate sodium does not alter agonist binding, but only agonist efficacy. Pregnenolone monosulfate sodium may act as a signal-specific negative allosteric modulator that occupies a site distinct from that occupied by the orthosteric ligand. When slices were pretreated with 100 nM Pregnenolone monosulfate sodium, the effects of THC were significantly attenuated (15.1 ± 1.8% inhibition). These effects may be due to Pregnenolone monosulfate sodium's presynaptic actions. Thus, Pregnenolone monosulfate sodium prevented the THC-induced increase in paired-pulse ratio but did not alter the amplitude or decay time of miniature EPSCs. [1]

Pregnenolone monosulfate sodium (2, 4 mg/kg) injected before each dose reduced WIN 55,212-2 intake and lowered breakpoints in a progressive ratio schedule.
Pregnenolone monosulfate sodium (2-6 mg/kg) blocked THC-induced food intake in Wistar rats and C57BL/6N mice and attenuated THC-induced memory impairment in mice, but it did not modify these behaviors by itself [1].