Effects of Agaricus blazei Murill Polysaccharides on Leadinduced Disturbance of Morphology and ASIC1a and ASIC2b Gene Expression in Hippocampus of Rats

The present study was undertaken to investigate the effects of Agaricus blazei murill polysaccharides on morphology of hippocampus tissue and expression of ASIC1a and ASIC2b mRNA in lead-poisoning rats.Forty SD rats were divided into five groups：control group,lead group,experimental group 1,2,3.After 60d of treatments,hippocampus tissues were observed by HE staining and the expression levels of ASIC1a and ASIC2b mRNA were determined by the flouoreescent quantitative real-time polymerase chain reaction（FQRT-PCR）.The results showed that after lead induction,the number of hippocampus neuron increased,cell gap increased,the chromatin was stained lightly;after administration of ABMP,the number of the hippocampus neuron increased as the dose of ABMP rose,cell gap decreased,the chromatin was stained darkly.The expression level of ASIC1a mRNA in hippocampus of rats in ABMP group decreased extremely significantly compared with that in the model group（P〈0.01）.Lead exposure and ABMP exhibited no significant effects on the expression level of ASIC2b mRNA.ABMP possesses a protective effect on nervous system of rats exposed to lead by combining with lead.

Study on Anti-infection Effect of Polysaccharide from Agaricus blazei Murrill on Mice

In order to study the anti-infection effect of phoshporylated Agaricus blazei polysaccharide on mice, mice were drenched phoshporylated A. blazei polysaccharide for 14 d, and an A. blazei polysaccharide control group and a blank control group were also set. The mice in all the three groups were infected with Escherichia coli on the 15 th day and the 29 th day of the experiment, the body weight of the mice in each group was recorded, as well as the spleen index on the 29 th day of infection and the 36 th day of the experiment, and the anti- E. coli titer in serum was also detected. The results showed that phoshporylated A. blazei polysaccharide could promote and maintain the development of spleen, and improve the immune response of organisms, thereby resisting bacterial infection. Furthermore, phoshporylated A. blazei polysaccharide has better immunoregulation and anti-infection effects than A. blazei polysaccharide, and could play an important role in veterinary clinical treatment and prevention and control of diseases as a immunologic adjuvant or immunopotentiator.

Study on Anti-infection Effect of Polysaccharide from Agaricus blazei Murrill on Chickens

In order to study the anti-bacterial infection effect of polysaccharide from Agaricus blazei Murrill on chickens, the experimental groups were orally administrated A. blazei polysaccharide at low dose and high dose, respectively, for 14 d continuously, and then, the chickens in various groups were infected with Escherichia coli or Pasteurella pneumotropica , so as to observe the clinical symptoms of chickens and record the change in body weight. Anatomy was performed 14 d later, and the organ indices were determined, so as to study the anti-bacterial infection effect of A. blazei polysaccharide on chickens. The results showed that after bacterial infection, the high-dose A. blazei polysaccharide group was significantly differed from other groups in changes of body weight and organ indices. It indicates that oral administration of high concentration of A. blazei polysaccharide could promote the development of poultry organs, thereby improving the immunity of organisms.

Agaricus blazei Murill polysaccharides alleviate oxidative stress and inflammatory responses against liver and lung injury

As a kind of well-known edible mushroom,the medicinal values of Agaricus blazei Murill also have been well acknowledged.There is no efficient treatment strategy for multiple organ dysfunction syndrome (MODS) so far,a crucial cause of clinical death.The present work was designed to evaluate the beneficially protective effects of Agaricus blazei Murill polysaccharides (ABMP) on liver and lung against zymosan (ZY)-induced MODS related damages.The MODS mice were successfully established by given one-time injection of zymosan solution (500 mg/kg) intraperitoneally.The in vivo results demonstrated that ABMP could improve the 10-day survival rate,ease abnormal physiological behavior and alleviate tissues oxidative stress in MODS mice.Besides,ABMP showed potential effects on attenuating the functional impairments of liver and lung.Meanwhile,ABMP effectively inhibited the activation of NF-κB signaling pathway and reduced the expressions of inflammatory cytokines,including TNF-α,IL-1β,IL-6,COX-2 and PGE-2.Additionally,the structural characterizations showed that the significant function of ABMP was possibly related with the β-pyranose configuration with a triple-helical structure composing of glucose mainly with the proper molecular weights of 12.26 kDa.These findings demonstrated that ABMP exhibited potential protections against liver and lung damages in the ZY-induced MODS mice,providing more theoretical basis and reference significance for the exploration of biological activity of A.blazei Murill.