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Isolation of Immunomodulatory Antitumor Active Polysaccharide (RGAP) from Red Ginseng By-Product and Its Physico-chemical Properties

홍삼추출잔사로부터 항암면역조절 활성을 보여주는 홍삼산성다당체(RGAP)의 분리 및 이화학적 특성

  • Published : 2003.07.01

Abstract

This study was carried out in order to develop the method for isolation of red ginseng acidic polysaccharide (RGAP) haying immunomodulating antitumor activity from red ginseng by-product. The red ginseng by-product was obtained from red ginseng residues produced in processing of red ginseng ethanol extract. The yield of RGAP isolated by ultrafiltration was 20.9%. The active substance (GFP) was purified by DEAE-sepharose column chromatography RGAP induced nitric oxide (NO) exhibited tumoricidal activities against P8l5 (mastocytoma) tumor cells. Acid-hydrolyzed RGAP fragments were shown four to five spots. These sopts showed the same R$_{f}$ values with sugars designated as rhamnose, glucose, glactose and glucuronic acid. Some physico-chemical properties of RGAP were investigated. pH and dry reduction content at 105$^{\circ}C$ were 4.74 and 4.72%, respectively. Crude protein, ash and Pb contents were 3.30%, 4.74% and 2.30 ppm. These results suggest that we will be able to produce RGAP from red ginseng by-product by ultrafiltration in a large scale.e.

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