Protective effects of a neutral polysaccharide isolated from the mycelium of Antrodia cinnamomea on Propionibacterium acnes and lipopolysaccharide induced hepatic injury in mice.
Mycelia of Antrodia cinnamomea were extracted with chloroform and hot water. A neutral polysaccharide named ACN2a separated from the water extract was purified using 10% CCl3COOH, and repeated column chromatography on HW-65 and DE-52 cellulose. Its structure was determined by chemical and spectroscopic analyses. ACN2a was composed of Gal, Glc, Fuc, Man and GalN (in the ratio 1:0.24:0.07:0.026:faint), in which an alpha-D-(1-->6)-Gal linkage accounted for 73% of all linkages. The ratio of branch points was about 16% of the total residual numbers, and branches were attached to C-2 of galactosyl residues of the main chain. ACN2a had an average molecular weight of 12.9x10(5) Daltons, [alpha]D25=+115 degrees (c=0.44, H2O); [eta]=0.0417dl.g-1, Cp=0.2663 cal/(g. degrees C). The hepatoprotective effect of ACN2a was evaluated using a mouse model of hepatic injury that was induced by Propionibacterium acnes (P. acnes) and lipopolysaccharide (LPS). The administration of ACN2a (0.4, 0.8 g/kg/d, p.o.), significantly prevented increases in serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) enzyme activities in mice treated with P. acnes-LPS, indicating hepatoprotective activity in vivo.
Han
Hao-Feng
HF
Institute of Natural Medicine, University of Toyama, Japan.
Nakamura
Norio
N
Zuo
Feng
F
Hirakawa
Akiko
A
Yokozawa
Takako
T
Hattori
Masao
M
D000410:Alanine Transaminase / Q000097:blood / Q000187:drug effects; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood / Q000187:drug effects; D056486:Chemical and Drug Induced Liver Injury; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D008070:Lipopolysaccharides; D008107:Liver Diseases / Q000517:prevention & control*; D051379:Mice; D008970:Molecular Weight; D025282:Mycelium / Q000737:chemistry*; D020072:Polyporales / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology / Q000627:therapeutic use*; D011425:Propionibacterium acnes; D020011:Protective Agents / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D013997:Time Factors
D008070:Lipopolysaccharides; D011134:Polysaccharides; D020011:Protective Agents; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase