Characterization of an Acidic Polysaccharide with Immunological Activities from the Tuber of Pinellia ternata

Ryoko Gonda, Masashi Tomoda, Noriko Shimizu, Naoko ōHARA, Hiroko Takagi, Shinobu Hoshino

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


An acidic polysaccharide, called pinellian PA, was isolated from the tuber of Pinellia ternata Breit. It was homogeneous on electrophoresis and gel chromatography, and its molecular mass was estimated to be 11.8 x 104. Pinellian PA is composed of L-arabinose: n-galactose: L-rhamnose: D-galacturonic acid: D-glucuronic acid in the molar ratio of 5:15:1:3:3, in addition to small amounts of O-acetyl groups and peptide moieties. Reduction of carboxyl groups, methylation analysis and nuclear magnetic resonance studies show that the core structural features include a backbone chain composed of β-1,3-linked D-galactose units. Some of the galactose units in the backbone carry β-1,6-linked D-galactosyl side-chains at position 6. Pinellian PA produces significant potentiation of the reticuloendothelial system, as shown by a carbon clearance test, and also exhibits potent anti-complementary activity.

Original languageEnglish
Pages (from-to)1549-1553
Number of pages5
JournalBiological and Pharmaceutical Bulletin
Issue number12
Publication statusPublished - 1994 Jan 1


  • Pinellia ternata
  • acidic arabinogalactan
  • immunological activity
  • pinellian PA
  • polysaccharide structure
  • tuber

ASJC Scopus subject areas

  • Pharmacology
  • Pharmaceutical Science


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