Abstract:Water soluble pectic polysaccharide fractions were isolated from different parts of Echinacea purpurea in order to elucidate any structural and biological differences. Water extracts of stems, leaves, flower buds, open flowerheads, post fertile flowers and roots were purified by ion exchange chromatography and by gelfiltration. The polysaccharides consisted of a high amount of galacturonic acid, but also rhamnose, arabinose and galactose with glycosidic linkages compatible with rhamnogalacturonan type I (RG-I)… Show more
“…Yeast-derived particulate β -glucan (p- β -glucan) shows it has the ability to activate macrophages and dendritic cells via the dectin-1 pathway [ 42 ]. Pectic polysaccharides have certain complement activity that could improve immunity in vivo [ 43 ]. Experiments have demonstrated that the TNF- α produced after drug-induced rat peritoneal macrophage activation is dependently stimulated by acidic E. purpurea in a concentration (3.7 μ g/mL-500 μ g/mL) that could stimulate the activation of macrophages to secrete IFN- β 2 , while the E. purpurea acidic arabinogalactan could also dependently stimulate macrophage phagocytosis in the range of 20-200 μ g/mL [ 16 , 44 ].…”
Polyploidization is an effective means of improving the active components and quality of secondary metabolism in medicinal plants. In the present study, we compared the immunostimulatory effects of crude polysaccharides from tetraploid and diploid Echinacea purpurea. The results showed that the carbohydrate contents of crude polysaccharide of tetraploid E. purpurea (CPE4) and diploid E. purpurea (CPE2) were 85.51% and 44.65%, respectively. 1H-nuclear magnetic resonance (NMR) spectroscopy and gel-permeation chromatography (GPC) analyses showed no major differences in the overall structure and molecular weight of polysaccharides between CPE4 and CPE2. However, some differences in the relative content of the same polysaccharides group were observed between CPE4 and CPE2. In in vitro tests, EP4 could stimulate lymphocyte proliferation and secretion of cytokines maximally at the concentration of 0.0312 mg/mL, and EP2 could stimulate lymphocyte proliferation and secretion of cytokines maximally at the concentration of 0.125 mg/mL. In in vivo tests, EP4 was more effective at promoting the proliferation of lymphocytes and secretion of cytokines in mice immunosuppressed by cyclophosphamide than EP2 at the same concentration. Taken together, these data demonstrated that the relative content of the partial polysaccharides group is increased, and the immunoregulatory effect is enhanced in tetraploid E. purpurea.
“…Yeast-derived particulate β -glucan (p- β -glucan) shows it has the ability to activate macrophages and dendritic cells via the dectin-1 pathway [ 42 ]. Pectic polysaccharides have certain complement activity that could improve immunity in vivo [ 43 ]. Experiments have demonstrated that the TNF- α produced after drug-induced rat peritoneal macrophage activation is dependently stimulated by acidic E. purpurea in a concentration (3.7 μ g/mL-500 μ g/mL) that could stimulate the activation of macrophages to secrete IFN- β 2 , while the E. purpurea acidic arabinogalactan could also dependently stimulate macrophage phagocytosis in the range of 20-200 μ g/mL [ 16 , 44 ].…”
Polyploidization is an effective means of improving the active components and quality of secondary metabolism in medicinal plants. In the present study, we compared the immunostimulatory effects of crude polysaccharides from tetraploid and diploid Echinacea purpurea. The results showed that the carbohydrate contents of crude polysaccharide of tetraploid E. purpurea (CPE4) and diploid E. purpurea (CPE2) were 85.51% and 44.65%, respectively. 1H-nuclear magnetic resonance (NMR) spectroscopy and gel-permeation chromatography (GPC) analyses showed no major differences in the overall structure and molecular weight of polysaccharides between CPE4 and CPE2. However, some differences in the relative content of the same polysaccharides group were observed between CPE4 and CPE2. In in vitro tests, EP4 could stimulate lymphocyte proliferation and secretion of cytokines maximally at the concentration of 0.0312 mg/mL, and EP2 could stimulate lymphocyte proliferation and secretion of cytokines maximally at the concentration of 0.125 mg/mL. In in vivo tests, EP4 was more effective at promoting the proliferation of lymphocytes and secretion of cytokines in mice immunosuppressed by cyclophosphamide than EP2 at the same concentration. Taken together, these data demonstrated that the relative content of the partial polysaccharides group is increased, and the immunoregulatory effect is enhanced in tetraploid E. purpurea.
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