Abstract
Alkaloids are waste products of plant metabolic processes, containing at least one nitrogen
atom in the heterocyclic ring. They serve a wide variety of physiological functions in humans and animals.
Metabolism plays a central role in regulating the toxicity of various phytochemicals. Available literature
of biological sources and metabolism study of pyrrolidine, pyrrolizidine, pyridine, quinoline, isoquinoline,
phenanthrene, phenethylamine, indole, terpenoid, and aporphine groups of experimental plantsderived
alkaloids were collected from the Google Scholar, PubMed/Medline, Science Direct, Scopus,
Wiley Online Library, and Web of Science search engines. The literature reveals that hepatic microsomal
enzymes such as monooxygenase and putative NADPH-FMN-reductase, carboxyl esterase, CYP2B6,
CYP3A4, and CYP2D6 are primarily involved in the metabolism of alkaloids. This review may encourage
natural product researchers to further research and develop new plant-derived alkaloidal drugs.
Keywords:
Experimental alkaloids, biological sources, metabolite study, metabolic pathway, hepatic microsomal enzymes, plant-derived alkaloidal drugs.
Graphical Abstract
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