Structural analysis of an immunoenhancing heteropolysaccharide isolated from the green (unripe) fruits of Solenum melongena (Brinjal)

A water-soluble polysaccharide (SMPS) isolated from the aqueous extract of the green (unripe) fruits of Solenum melongena (Brinjal) contains d-galactose, d-methyl galacturonate, 3-O-acetyl d-methyl galacturonate, and l-arabinose in a molar proportion of nearly 1:1:1:1. Structural investigation of the polysaccharide was carried out using total acid hydrolysis, methylation analysis, periodate oxidation study, and NMR studies (1H, 13C, DQF-COSY, TOCSY, NOESY, ROESY, HMQC, and HMBC). On the basis of the above experiments the structure of the repeating unit of the polysaccharide (SMPS) was established asFigure optionsDownload as PowerPoint slideThis molecule showed splenocyte and thymocyte activations.

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