title: Immunostimulatory activity of the polysaccharides from Hyriopsis cumingii.
abstract: The immunostimulatory activity of Hyriopsis cumingii polysaccharides (HCPS) was evaluated by using in vitro cell models and in vivo animal models. The results demonstrated that crude HCPS and its purified fractions (HCPS-1, HCPS-2 and HCPS-3) could promote the splenocyte proliferation, increase the activity of acid phosphatase in peritoneal macrophages and strengthen peritoneal macrophages to devour neutral red in vitro in a dose-dependent manner. Furthermore, HCPS-3 exhibited much stronger immunostimulatory activity in vitro than crude HCPS, HCPS-1 and HCPS-2, probably due to the higher sulfate content of HCPS-3. For assay in vivo, crude HCPS significantly increased the indices of spleen and thymus, the activity of lysozyme in serum and the swelling rate of earlap in delayed-type hypersensitivity in a dose-dependent manner. These results suggested that HCPS might be a potential natural immunomodulator.
authors.affiliation: College of Food Science and Technology, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China.
authors.forename: Deliang
authors.initials: D
authors.lastname: Qiao
authors.forename: Jianguang
authors.initials: J
authors.lastname: Luo
authors.forename: Chunling
authors.initials: C
authors.lastname: Ke
authors.forename: Yi
authors.initials: Y
authors.lastname: Sun
authors.forename: Hong
authors.initials: H
authors.lastname: Ye
authors.forename: Xiaoxiong
authors.initials: X
authors.lastname: Zeng
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000818:Animals; D049109:Cell Proliferation / Q000187:drug effects; D045424:Complex Mixtures / Q000494:pharmacology; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007114:Immunization; D017737:Macrophages, Peritoneal / Q000187:drug effects / Q000201:enzymology; D051379:Mice; D009113:Muramidase / Q000097:blood; D009499:Neutral Red / Q000378:metabolism; D011134:Polysaccharides / Q000276:immunology* / Q000494:pharmacology; D013154:Spleen / Q000166:cytology / Q000187:drug effects / Q000276:immunology; D013950:Thymus Gland / Q000187:drug effects / Q000276:immunology; D049876:Unionidae / Q000737:chemistry*
chemical_list: D045424:Complex Mixtures; D011134:Polysaccharides; D009499:Neutral Red; D000135:Acid Phosphatase; D009113:Muramidase