title: [Structural analysis and anti-tumor activity in vivo of polysaccharide APS-2a from Angelica sinensis].
abstract: The polysaccharide APS-2a was isolated from Angelica sinensis (Oliv.) Diels through water extraction, deprotein, ethanol precipitation and DEAE-sephades A-25 column chromatography respectively,and was further purified by Sephacryl S-400 and Sephadex G-100 column chromatography. The phenol-sulfuric acid assay and Bradford method were used to determine the contents of carbohydrate and protein, respectively. The molecular weight was carried out with high-performance size exclusion chromatography (HPSEC) combined with a differential refractometer detector. The monosaccharide compositions were determined by gas chromatography after complete hydrolysis with acid. The models of mice transplanted sarcoma S-180 were used to study the anti-tumor effects in vivo. Thymus indexes, spleen indexes were determined. The HPSEC result showed the APS-2a was a single homogeneous component and its weight average molecular weight was 7.4 x 10(5) Da. The monosaccharide composition of APS-2a was glucose, galactose, arabinose, rhamnose, galcturonic acid. Furthermore, APS-2a (20.50 mg/kg) could inhibit the proliferation of tumor cells in mice transplanted S-180. The thymus indexes and spleen indexes in the groups treated with APS-2a were higher than control group.
authors.affiliation: Department of Pharmacology, School of Pharmacy, the Fourth Military Medical University, Xi'an 710032, China. caowei@fmmu.edu.cn
authors.forename: Wei
authors.initials: W
authors.lastname: Cao
authors.forename: Xiao-Qiang
authors.initials: XQ
authors.lastname: Li
authors.forename: Ying
authors.initials: Y
authors.lastname: Hou
authors.forename: Hui-Ting
authors.initials: HT
authors.lastname: Fan
authors.forename: Xiao-Nan
authors.initials: XN
authors.lastname: Zhang
authors.forename: Qi-Bing
authors.initials: QB
authors.lastname: Mei
mesh_terms: D029971:Angelica sinensis / Q000737:chemistry*; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification / Q000494:pharmacology*; D045744:Cell Line, Tumor; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D008970:Molecular Weight; D009368:Neoplasm Transplantation; D010946:Plants, Medicinal / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D012510:Sarcoma 180 / Q000473:pathology / Q000517:prevention & control*; D013154:Spleen / Q000187:drug effects / Q000473:pathology; D013950:Thymus Gland / Q000187:drug effects / Q000473:pathology
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D011134:Polysaccharides