Abstract
Crude polysaccharide fractions, rich mainly in arabinogalactans (A), pectin (B) and glucuronoxylan-related polymers (D), have been obtained from aerial parts of sage ( Salvia officinalis L.) by sequential extraction with various reagents. Arabinogalactans displayed on HPLC a dominance of lower molecular-mass polymers ( M ̄ w <10 ,000), while pectin and glucuronoxylan-related polysaccharides showed predominance of polymers with M ̄ w >50 ,000. Individual polysaccharide fractions were examined for their immunomodulatory activity in the in vitro comitogenic thymocyte test. The polysaccharide fractions tested possessed the capacity to induce rat thymocyte proliferation in the order D>B>A. Besides, fraction D possessed a significant comitogenic effect, and the SI comit/SI mit ratio 3–4 indicates potential adjuvant properties of this glucuronoxylan-rich material.
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