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Crocus sativus L. (family: Iridaceae) has been documented in traditional medicine with numerous medicinal properties. Recently, we have shown that C. sativus extract (IIIM-141) displays promising efficacy in a genetic mice (5XFAD) model of Alzheimer's disease (AD) ( ACS Chem. Neurosci . 2017,  16 , 1756). To translate the available traditional knowledge and the scientifically validated results into modern medicine, herein we aimed to carry out its preclinical development. IIIM-141 is primarily a mixture of crocins containing trans -4-GG-crocin (36 % w/w) as the principal component. The in vitro studies show that IIIM-141 has protective as well as therapeutic properties in assays related to AD. It induces the expression of P-gp, thereby enhancing the amyloid-β clearance from an AD brain. It also inhibits NLRP3 inflammasome and protects SH-SY5Y cells against amyloid-β- and glutamate-induced neurotoxicities. In behavioral models, it decreased the streptozotocin-induced memory impairment in rats and recovered the scopolamine-induced memory deficit in Swiss albino mice at 100 mg/kg dose. The acute oral toxicity study shows that IIIM-141 is safe up to the dose of 2000 mg/kg, with no effect on the body weight and on the biochemical/hematological parameters of the rats. The repeated oral administration of IIIM-141 for 28 days at 100 mg/kg dose did not cause any preterminal deaths and abnormalities in Wistar rats. The pharmacokinetic analysis indicated that after oral administration of IIIM-141, the majority of crocin gets hydrolyzed to its aglycone crocetin. The sustained release (SR) capsule formulation was developed, which showed an improved in vitro dissolution profile and a significantly enhanced plasma exposure in the pharmacokinetic study. The SR formulation resulted in 3.3-fold enhancement in the area under the curve of crocetin and doubling of the crocetin/crocin ratio in plasma compared with the extract. The data presented herein will serve as the benchmark for further research on this botanical candidate.

acs omega

Preclinical Development of <i>Crocus sativus</i>-Based Botanical Lead IIIM-141 for Alzheimer’s Disease: Chemical Standardization, Efficacy, Formulation Development, Pharmacokinetics, and Safety Pharmacology

Preclinical Development of Crocus sativus-Based Botanical Lead IIIM-141 for Alzheimer’s Disease: Chemical Standardization, Efficacy, Formulation Development, Pharmacokinetics, and Safety Pharmacology