title: Immune-stimulating properties of polysaccharides from Phellodendri cortex (Hwangbek).
abstract: Heteropolysaccarides were isolated from the Korean medicinal plant, Phellodendri cortex (Hwangbek), by hot water and alkali extractions. The extracted polysaccharides were fractionated into eight fractions and they are mainly composed of D-N-acetylglucosamine, D-galactose, D-mannose, and D-glucose. Among the polysaccharide fractions, Fr.-2 showed a potent B-lymphocyte-stimulating activity in a system using polyclonal antibody forming cells in C57BL/6XC3H mice at dosages of 2-10 mg. On the basis of their solubility in aqueous ethanol, four fractions of Fr.-2-1 to Fr.-2-4 were further obtained from the Fr.-2, and Fr.-2-3 was divided into Fr.-2-3-1, 2, 3, and 4 by DEAE cellulose chromatography. The main activity was found in Fr.-2-3-2, which contained 100% (w/w) of carbohydrates and further purified to Fr.-2-3-2-2 by gel filtration chromatography using TSK Gel HW50S. Fr.-2-3-2-2, having a molecular weight of about 230 kDa, showed the highest B-cell-stimulating activity and the half-maximal concentration for B-lymphocyte-stimulating activity was ca. 2.2 microg/ml.
authors.affiliation: Department of Biochemistry, Molecular Biology and Gynecology, College of Oriental Medicine, Dongguk University, Kyungju City, Kyungpook, Korea.
authors.forename: J I
authors.initials: JI
authors.lastname: Park
authors.forename: J K
authors.initials: JK
authors.lastname: Shim
authors.forename: J W
authors.initials: JW
authors.lastname: Do
authors.forename: S Y
authors.initials: SY
authors.lastname: Kim
authors.forename: E K
authors.initials: EK
authors.lastname: Seo
authors.forename: H J
authors.initials: HJ
authors.lastname: Kwon
authors.forename: T K
authors.initials: TK
authors.lastname: Lee
authors.forename: J K
authors.initials: JK
authors.lastname: Kim
authors.forename: D Y
authors.initials: DY
authors.lastname: Choi
authors.forename: C H
authors.initials: CH
authors.lastname: Kim
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000378:metabolism*; D005591:Chemical Fractionation; D002848:Chromatography, DEAE-Cellulose; D002850:Chromatography, Gel; D005260:Female; D006168:Guinea Pigs; D007723:Korea; D008213:Lymphocyte Activation; D008518:Medicine, East Asian Traditional; D051379:Mice; D008815:Mice, Inbred Strains; D010936:Plant Extracts / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D010936:Plant Extracts; D011134:Polysaccharides