Anticancer and Cytotoxic Natural Compounds from Central Asian Medicinal Plants: A Narrative Review

Abstract

Plant-derived natural products continue to supply a substantial proportion of clinically used and investigational anticancer agents, yet the medicinal flora of Central Asia, and Uzbekistan in particular, remains comparatively underexplored as a source of such compounds relative to its exceptional botanical diversity. This review synthesises evidence on cytotoxic and antitumour secondary metabolites characterised from Central Asian plant genera, drawing on both classical phytochemical work carried out largely by regional research groups and more recent, internationally published studies. We discuss flavonoids from Scutellaria immaculata and S. ramosissima, phytoecdysteroids isolated from several Silene species with demonstrated in vitro antitumour and antioxidant activity, sesquiterpene coumarins from Ferula species with documented cytokine-modulating and cytotoxic effects, essential-oil constituents from aromatic Tajik plants active against HeLa, Caco-2 and MCF-7 cancer cell lines, and anticancer polysaccharides and proteins isolated from medicinal macrofungi native to the region's forest ecosystems. Across these taxa, the dominant chemical classes with documented cytotoxic activity include flavonoids, phytoecdysteroids, sesquiterpene coumarins and fungal polysaccharide-protein complexes, several of which additionally display antioxidant or immunomodulatory properties that may act synergistically with direct cytotoxicity. We conclude that Central Asian flora and associated macrofungi constitute a genuine, still substantially underexploited source of candidate anticancer natural products, but that the evidence base remains almost entirely preclinical, in vitro and mechanistically incomplete, and that structure-activity elucidation, in vivo efficacy testing and eventual clinical evaluation represent the principal directions required to translate this regional phytochemical heritage into oncological application.