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Planta Med 2006; 72(13): 1193-1199
DOI: 10.1055/s-2006-947222
Original Paper
Pharmacology
© Georg Thieme Verlag KG Stuttgart · New York

Immunoactive Polysaccharide-Rich Fractions from Panax notoginseng

Ying Zhu1 , Filomena Pettolino1 , Shaio-lim Mau1 , Yu-Chang Shen2 , Chie-Fu Chen2 , Yuh-Chi Kuo3 , Antony Bacic1
  • 1Cooperative Research Centre for Bioproducts, School of Botany, University of Melbourne, Australia
  • 2National Research Institute of Chinese Medicine, Taipei, Taiwan, R.O.C.
  • 3Institute of Life Science, Fu-Jen University, Taipei, Taiwan, R.O.C.
Further Information

Publication History

Received: January 9, 2006

Accepted: July 2, 2006

Publication Date:
18 September 2006 (online)

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Abstract

Panax notoginseng is a commonly used medicinal plant in south-western China. In a previous study, a sequential solubilisation of P. notoginseng high-molecular-weight (HMW) polymers using phenol-acetic acid-water, hot water, weak and strong alkali was performed to determine the structure of the component polysaccharides and proteins. The effects of these extracted HMW fractions on the human complement system, polymorphonuclear neutrophils (PMN) and peripheral blood mononuclear cells (PBMC) are reported here. Fr1MKOH, which was extracted with 1 M KOH, showed the strongest complement-fixing activity and priming of reactive oxygen species (ROS) production by PMNs, as well as a mitogenic effect. Fr1MKOH was further fractionated by anion-exchange chromatography followed by gel-permeation chromatography. 1MD3-G2, the fraction most strongly bound to the DEAE anion-exchange column with a molecular weight of 1140 kDa, showed the highest complement-fixing activity. It is composed of acidic polysaccharides [including glucuronoarabinoxylan (GAX), homogalacturonan (HGA), rhamnogalacturonan I (RG I)], neutral polysaccharides (4-galactan and arabinan), and some protein.

Key words

Panax notoginseng - Araliaceae - polysaccharides - complement-fixing activity - ROS production - mitogenic effect - immunomodulation

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Professor A. Bacic

Cooperative Research Centre for Bioproducts

School of Botany

University of Melbourne

Victoria 3010

Australia

Phone: +61-3-8344-5041

Fax: +61-3-9347-1071

Email: abacic@unimelb.edu.au