Influence of Different Processing Methods on Polysaccharide Content in Morinda Officinalis(Ⅰ)
狄士文1,, 周灿1,, 廖莎2, 陈娥1
1.湖北医药学院附属人民医院药学部,十堰 442000
2.湖北医药学院附属太和医院中西医结合风湿病科,十堰 442000
DI Shiwen1,, ZHOU Can1,, LIAO Sha2, CHEN E1
1.Department of Pharmacy,Renmin Hospital Affiliated to Hubei University of Medicine,Shiyan 442000,China
2.Department of Combine Traditional Chinese and Western Medicine Rheumatology,Taihe Hospital Affiliated to Hubei University of Medicine,Shiyan 442000,China
Objective To compare the influence of different processing methods on polysaccharide content in Morinda Officinalis. Methods Reflux extraction was performed with 80% ethanol.Ultraviolet spectrophotometery was used to determine the polysaccharide content after Phenol-sulferic acid method. ResultsMorinda officinalis was treated with different processing methods to remove moody core.The polysaccharide content in Morinda officinalis was the highest by cooking method (4.001±0.004)%,and the next was steaming method with salt (2.312±0.006)%,the sequence of the others was moistening method (2.163±0.010)%,steaming method after soaking (1.910±0.008)%,soaking method (1.731±0.008)% and steaming method (1.123±0.013)%. Conclusion The highest polysaccharide content is obtained in Morinda officinalis when processed by cooking method for removing woody core.
KIM SD.Isolation,structure and cholesterol esterase inhi-bitory activity of a polysaccharide,PS-A,from Gordyceps-sinensis[J].,2010,53:784-789.
A heteropolysaccharide possessing strong inhibitory activity against cholesterol esterase, namely PS-A, was isolated from water extracts of Cordyceps sinensis by activity-guided fractionation. The molecular weight of PS-A was estimated as 4.6-10 5 Da. Compositional analysis revealed the presence of D-glucose, D-galactose, and D-mannose at a molar ratio of 2:1:1. The 1 H and 13 C nuclear magnetic resonance spectra, correlation spectroscopy, nuclear Overhauser effect spectroscopy, and heteronuclear multiple bond correlations experiment established the structure of PS-A as follows: {fx784-1} Results of the in vitro enzyme assay showed strong inhibition of cholesterol esterase by PS-A, with an IC 50 value of 12.7 g/mL, suggesting the possibility of its usefulness as a potential agent for control of hypercholesterolemia.
GUNELIE,TUGYANK,OZURLTH,et al.Effect of mela-tonin on testicular damage in streptozotocin-induced diabetes rats[J].,2008,40(4):354-355.
Background: It is well known that diabetes mellitus is associated with impairment of testicular function. In the present study, we aimed to demonstrate the effect of melatonin on testicular damage in male rats with streptozotocin (STZ)-induced diabetes. Methods: Male Wistar rats were divided into 4 groups: (1) control group, (2) melatonin-treated nondiabetic group, (3) diabetic group and (4) melatonin-treated diabetic group. Diabetes was induced by STZ injection. Melatonin was administered intraperitoneally at the dose of 10 mg/kg for 5 days. Testicular damage was examined by using hematoxylin and eosin staining and periodic acid-Schiff staining, and apoptosis was determined by terminal-deoxynucleotidyl-transferase-mediated dUTP nick end labeling (TUNEL). Potential disorders associated with seminiferous tubular sperm formation were evaluated using the Johnsen score. Results: Diabetic rats showed a reduction in seminiferous tubule diameter, increased thickening of the basement membrane in seminiferous tubules and degenerated germ cells. TUNEL-positive cells were significantly more numerous in diabetic rats than in control rats. Melatonin significantly attenuated the diabetes-induced morphological changes and germ cell apoptosis in the diabetic rat testis. The number of polymorphonuclear leukocytes was significantly decreased in group 4 when compared to group 3. Conclusions: These results suggest that intraperitoneal administration of melatonin for 5 days is a potentially beneficial agent to reduce testicular damage in adult diabetic rats, probably by decreasing oxidative stress.