Deficits in the clearance of amyloidβprotein(Aβ)by the peripheral system play a critical role in the pathogenesis of sporadic Alzheimer’s disease(AD).Impaired uptake of Aβby dysfunctional monocytes is deemed to be...Deficits in the clearance of amyloidβprotein(Aβ)by the peripheral system play a critical role in the pathogenesis of sporadic Alzheimer’s disease(AD).Impaired uptake of Aβby dysfunctional monocytes is deemed to be one of the major mechanisms underlying deficient peripheral Aβclearance in AD.In the current study,flow cytometry and biochemical and behavioral techniques were applied to investigate the effects of polysaccharide krestin(PSK)on AD-related pathology in vitro and in vivo.We found that PSK,widely used in therapy for various cancers,has the potential to enhance Aβuptake and intracellular processing by human monocytes in vitro.After administration of PSK by intraperitoneal injection,APP/PS1 mice performed better in behavioral tests,along with reduced Aβdeposition,neuroinflammation,neuronal loss,and tau hyperphosphorylation.These results suggest that PSK holds promise as a preventive agent for AD by strengthening the Aβclearance by blood monocytes and alleviating AD-like pathology.展开更多
The effect of protein bound polysaccharide Krestin (PSK,a polysacchride extracted from Coriolus Versicolor)intraperitoneally injected into mice on the gene expression of SeGSHPx in peritoneal macrophages and of small ...The effect of protein bound polysaccharide Krestin (PSK,a polysacchride extracted from Coriolus Versicolor)intraperitoneally injected into mice on the gene expression of SeGSHPx in peritoneal macrophages and of small dosage(1×10-6μmol/L) of tert-butyl hydroperoxide (tbOOH) in vitro on the gene expression of SeGSHPx in macrophage from mice treated by PSK were studied. The results showed that PSK could enhance the gene expression of SeGSHPx in macrophages,this corresponded with our previous work that PSK could increase the activity of SeGSHPx in macrophages. Small dosage of tbOOH had no marked effect on the gene expression of SeGSHPx in macrophages from mice treated by PSK,but could significantly induce the gene expression of SeGSHPx in macrophages from non-PSK treated mice.展开更多
基金the National Natural Science Foundation of China(81930028,91749206,81625007,and 31921003).
文摘Deficits in the clearance of amyloidβprotein(Aβ)by the peripheral system play a critical role in the pathogenesis of sporadic Alzheimer’s disease(AD).Impaired uptake of Aβby dysfunctional monocytes is deemed to be one of the major mechanisms underlying deficient peripheral Aβclearance in AD.In the current study,flow cytometry and biochemical and behavioral techniques were applied to investigate the effects of polysaccharide krestin(PSK)on AD-related pathology in vitro and in vivo.We found that PSK,widely used in therapy for various cancers,has the potential to enhance Aβuptake and intracellular processing by human monocytes in vitro.After administration of PSK by intraperitoneal injection,APP/PS1 mice performed better in behavioral tests,along with reduced Aβdeposition,neuroinflammation,neuronal loss,and tau hyperphosphorylation.These results suggest that PSK holds promise as a preventive agent for AD by strengthening the Aβclearance by blood monocytes and alleviating AD-like pathology.
文摘The effect of protein bound polysaccharide Krestin (PSK,a polysacchride extracted from Coriolus Versicolor)intraperitoneally injected into mice on the gene expression of SeGSHPx in peritoneal macrophages and of small dosage(1×10-6μmol/L) of tert-butyl hydroperoxide (tbOOH) in vitro on the gene expression of SeGSHPx in macrophage from mice treated by PSK were studied. The results showed that PSK could enhance the gene expression of SeGSHPx in macrophages,this corresponded with our previous work that PSK could increase the activity of SeGSHPx in macrophages. Small dosage of tbOOH had no marked effect on the gene expression of SeGSHPx in macrophages from mice treated by PSK,but could significantly induce the gene expression of SeGSHPx in macrophages from non-PSK treated mice.
