OBJECTIVE:

To perform a bioinformatics assessment of the physicochemical, pharmacokinetic, and druglikeness properties of the alkaloids emetine and cephaeline from Carapichea ipecacuanha, aiming to predict their potential pharmacological profiles and explore possible mechanisms of antimalarial activity.

MATERIALS AND METHODS:

In silico analyses were conducted to evaluate physicochemical, pharmacokinetic, and toxicodynamic parameters based on the chemical structures of emetine and cephaeline, including isotopic and stereochemical specifications. To explore a possible mechanism of antimalarial activity, a prediction algorithm for major human macromolecular targets was applied, screening more than three thousand proteins through domain homology using programs from the Swiss Institute of Bioinformatics.

RESULTS:

Both alkaloids exhibited favorable druglike physicochemical and pharmacokinetic properties, such as high predicted gastrointestinal absorption and the ability to cross the blood-brain barrier. However, both compounds appeared to act as substrates for P-glycoprotein, an efflux transporter that limits central nervous system access. Neither alkaloid showed inhibitory potential against major cytochrome P450 isoenzymes. Target prediction indicated significant interaction probabilities with class A (rhodopsin-like) G protein-coupled receptors - particularly α1A- and α2A-adrenergic receptors - as well as enzymes such as putative RBBP9 hydrolase and voltage-gated ion channels.

CONCLUSION:

The in silico analyses suggest that emetine and cephaeline possess promising druglike profiles, supporting further experimental studies to validate their antimalarial and other pharmacological activities.