Systematic review describes polysaccharide mechanisms and structure-activity relationships for anti-cancer effects

A systematic review article synthesized existing research on natural polysaccharides and their potential anti-cancer properties. The review summarized preclinical and cell-based studies, describing mechanisms of action but did not report on a specific clinical population, sample size, comparator, or primary outcome. No clinical trial data, statistical measures of effect, or safety outcomes from human studies were included.

The main findings from the reviewed literature indicate polysaccharides may exert synergistic anti-cancer effects through multi-target, multi-pathway mechanisms. These include the induction of immune cell polarization and tumor cell apoptosis, inhibition of tumor cell migration and angiogenesis, and modulation of key signaling pathways such as P53, NF-κB, and Wnt/β-catenin. The review also reported that polysaccharides with specific structural features—like certain monosaccharide compositions, optimal molecular weights, β-glycosidic linkages, triple-helix conformations, or chemical modifications—exhibit enhanced biological and anti-tumor activities in preclinical models.

Safety and tolerability data from human studies were not reported. The authors of the review identified key limitations in the current evidence base, noting that future efforts should focus on elucidating structure-activity relationships, developing targeted delivery systems to improve bioavailability and tumor specificity, and advancing large-scale, multi-center, long-term clinical trials. The practice relevance is restrained; this review summarizes mechanistic and preclinical findings only. It serves as a foundation for future research but does not provide evidence to support current clinical use, as clinical efficacy and safety profiles remain unestablished.