An arabinose-rich heteropolysaccharide isolated from Belamcanda chinensis (L.) DC treats liver cancer by targeting FAK and activating CD40.

An undisclosed polysaccharide, BCP80–2, was isolated from Belamcanda chinensis (L.) DC. Structural investigation revealed that BCP80–2 consists of ten monosaccharide residues including t- α -Ara f -(1→, →3,5)- α -Ara f -(1→, →5)- α -Ara f -(1→, →4)- β -Xyl p -(1→, →3)- α -Rha p -(1→, →4)- β -Man p -(1→, t- β -Glc p -(1→, →6)- α -Glc p -(1→, t- β -Gal p -(1→, and→3)- α -Gal p -(1→. In vivo activity assays showed that BCP80–2 significantly suppressed neoplasmic growth, metastasis, and angiogenesis in zebrafish. Mechanistic studies have shown that BCP80–2 inhibited cell migration of HepG2 cells by suppressing the FAK signaling pathway. Moreover, BCP80–2 also activated immunomodulation and upregulated the secretion of co-stimulatory molecules CD40, CD86, CD80, and MHC-II. In conclusion, BCP80–2 inhibited tumor progression by targeting the FAK signaling pathway and activating CD40-induced adaptive immunity. [Display omitted] [ABSTRACT FROM AUTHOR]