title: Water-soluble polysaccharides from Angelica sinensis (Oliv.) Diels: Preparation, characterization and bioactivity.
abstract: Crude water-soluble polysaccharides (ASP) were separated from Angelica sinensis (Oliv.) Diels by hot water extraction. They were fractionated into neutral and acidic polysaccharides by anion-exchange chromatography. The neutral polysaccharide (ASP1) was rich in glucose, galactose, and arabinose suggesting a mixture of glucan and arabinogalactan. The acidic polysaccharide (ASP2, ASP3) consisted mainly of galacturonic acid along with rhamnose, arabinose, and galactose indicating a pectic polysaccharide. The degree of esterification of ASP and ASP3 were 54.06% and 47.14% for the crude and purified sample, respectively. ASP3, with a molecular weight of 3.4x10(4)Da determined by high-performance size-exclusion chromatography (HPSEC), was the major constituent for the crude extracts. The radioprotective effect of the pectic polysaccharide ASP3 was studied in murine models. ASP3 pretreated mice exhibited a significant decrease of apoptosis (P<0.05, dosage of 200 mg/kgd body weight) in peripheral lymphocytes compared to the irradiated control. The results showed that ASP3 can protect leucocytes and lymphocytes of mice against radiation induced damage, which has potential radioprotective effect on acute radiation injured mice.
authors.affiliation: School of Food Science and Technology, Southern Yangtze University, Wuxi 214036, China.
authors.forename: Yuanlin
authors.initials: Y
authors.lastname: Sun
authors.forename: Jian
authors.initials: J
authors.lastname: Tang
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Gu
authors.forename: Deyuan
authors.initials: D
authors.lastname: Li
mesh_terms: D029971:Angelica sinensis / Q000378:metabolism*; D000818:Animals; D017209:Apoptosis; D001089:Arabinose / Q000737:chemistry; D001835:Body Weight; D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D005434:Flow Cytometry; D005690:Galactose / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D007962:Leukocytes / Q000378:metabolism; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism / Q000473:pathology / Q000528:radiation effects; D051379:Mice; D010936:Plant Extracts / Q000494:pharmacology; D018517:Plant Roots / Q000378:metabolism; D010946:Plants, Medicinal / Q000378:metabolism; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification*; D011837:Radiation-Protective Agents / Q000494:pharmacology; D012210:Rhamnose / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014574:Uronic Acids / Q000378:metabolism; D014867:Water / Q000378:metabolism
chemical_list: D006603:Hexuronic Acids; D010936:Plant Extracts; D011134:Polysaccharides; D011837:Radiation-Protective Agents; D014574:Uronic Acids; D014867:Water; C007819:galacturonic acid; D001089:Arabinose; D005947:Glucose; D012210:Rhamnose; D005690:Galactose