OBJECTIVE: To investigate the anti-apoptotic effect of Angelica polysaccharide (APS) on cryopreservated platelets and its mechanism. METHODS: The platelets were divided into 4 group: control group(4 ℃ stored platelets),APS group (APS-treated platelets stored at 4 ℃), LY294002 group (LY294002-treated platelets stored at 4 ℃) and LY294002+APS group(LY294002+APS treated platelets stored at 4 ℃ ). The expression of platelet membrane glycoprotein CD41 and CD61, as well as the platelet apoptotic rate, Caspase 3 expression and mitochondrial membrane potential (MMP) were detected by flow cytometry; the anti-apoptotic mechanism of APS by PI3K /AKT signaling pathway was analyzed by Western blot assay. RESULTS: The apoptosis rate of platelets in LY294002 group obviously increased, the activity of CD41 and CD61 expression gradually decreased along with the enhancement of LY294002 concentrations (r=-0.953)； compared with control group, the apoptosis rate of platelets in LY294002 group was enhanced significantly(P<0.05)，while the apoptosis rate of platelets in LY294002+APS group significantly was reduced(P<0.05) as compare with LY294002 group, which suggest that APS has an anti-apoptotic effect on the cryopreserved platelets. APS decreased the expression of Caspase-3 and inhibited the reduction of mitochondrial membrane potential induced by LY294002, moreover, APS could increase the activation of PI3K /AKT pathway in Plt. CONCLUSION APS has an anti-apoptotic effect on the cryopreserved platelets through activating the PI3K /AKT pathway, decreasing the expression of apoptosis protease Caspase-3 and inhibiting the reduction of MMP.
Angelica ; Apoptosis ; Blood Platelets ; Chromones ; Morpholines ; Phosphatidylinositol 3-Kinases ; Polysaccharides ; Proto-Oncogene Proteins c-akt

Polysaccharides are macromolecular compounds formed by more than 10 monosaccharide molecules linked by glycosidic bonds. Polysaccharides have a wide range of sources, high safety and low toxicity, with a variety of biological activities, such as anti-tumor, anti-virus, immune regulation, lowering blood glucose, and lowering blood lipids. Type 2 diabetes mellitus(T2 DM) is a chronic metabolic disorder characterized by hyperglycemia, insulin resistance and low inflammation. In recent years, the treatment of T2 DM with polysaccharide has become a research hotspot. Polysaccharides can not only make up for the side effects such as hypoglycemia, weight gain, gastrointestinal injury caused by long-term treatment of acarbose, biguanidine and sulfonylurea, but also play an effective role in reducing glucose by regulating glucose metabolism, oxidative stress, inflammatory response, intestinal flora, etc. In this paper, the research progress of polysaccharides in the treatment of T2 DM was reviewed. In addition, the hot spots such as the hypoglycemic activity of polysaccharides with structural modifications were summarized, providing theoretical guidance for the development of active polysaccharide hypoglycemic medicines and the further study of action mechanism.
Blood Glucose ; Diabetes Mellitus, Type 2/drug therapy* ; Humans ; Hypoglycemic Agents/pharmacology* ; Insulin Resistance ; Polysaccharides

Animals ; Blood Glucose ; Cucurbita ; chemistry ; Diabetes Mellitus, Experimental ; drug therapy ; Hypoglycemic Agents ; pharmacology ; Lipids ; blood ; Oxidative Stress ; Polysaccharides ; pharmacology ; Rats

Traditional Chinese medicine polysaccharides is a biologically active ingredient that is not easy to be digested. It is fermented by intestinal microflora to promote qualitative and selective changes in the composition of the intestinal microbiome, which often result in beneficial effects on the health of the host. People call it "prebiotics". In this review, we systematically summarized the anti-diabetic effect of traditional Chinese medicine polysaccharides. These polysaccharides regulate the metabolism of sugar and lipids by inter-influence with the intestinal microflora, and maintain human health, while improving type 2 diabetes-like symptoms such as high blood glucose, and abnormal glucose and lipid metabolism.
Blood Glucose/metabolism* ; Diabetes Mellitus, Type 2/metabolism* ; Humans ; Lipids ; Medicine, Chinese Traditional ; Polysaccharides/pharmacology* ; Probiotics/therapeutic use*

OBJECTIVETo use a lectin microarray to study the alteration of glycan affinity profiles of serum glycoproteins during the hepatitis B e antigen (HBeAg) and hepatitis B surface antigen (HBsAg) seroconversion in patients with chronic hepatitis B (CHB) following treatment with antiviral therapy,and to explore its biological significance.

METHODSCHB patients were divided into the following four groups:untreated HBeAg-positive,HBeAg seroconversion after anti-HBV therapy,HBsAg loss after anti-HBV therapy,and healthy individuals (controls).Serum samples were collected from each participant,depleted of high abundance proteins and analyzed by a lectin microarray containing 50 lectins.The lectin-affinity glycan profiles of serum proteins were partially verified by lectin blotting.Between-group differences were analyzed by one-way analysis of variance,and pairwise comparisons were carried out with the Student-Newman-Keuls (SNK) method.

RESULTSThe results from the lectin microarray and lectin blotting assay showed significantly reduced affinity for 16 lectins in the untreated HBeAg-positive group compared to the control group (P less than 0.05);in addition,the specific glycan profiles of the untreated HBeAg-positive group included decreased terminal and core fructose,GalNAc alpha-Thr/Ser (T,Tn-antigen),GalNac alpha,terminal beta1-4,and beta-D galactose,bisecting and/or GlcNAc,mannose and Sia.However,the HBeAg seroconversion after anti-HBV therapy group showed enhanced binding of PSA,MPL and the above-mentioned 16 lectins (P less than 0.05),suggesting that the reduced serum glycoprotein glycan structures returned to normal or slightly higher than healthy levels after the therapy-induced seroconversion.Comparison of the group with HBsAg loss after anti-HBV therapy to the group with HBeAg seroconversion after anti-HBV therapy showed the binding ability of ten lectins (AAL,ACL,HAL,HPL,RCA-I,LEL,STL,PHA-E,NML and PCL) were weakened to near control levels and six lectins (VAL,LCA,GNL,PSA,MPL and JAC) were significantly strengthened (all P less than 0.05). These findings implied that the glycan containing terminal fructose, GalNacalpha, terminal beta1-4 galactose,and bisecting GlcNAc glycan structures dropped to near control levels, while the terminal beta-D-galactose residues and core fructose structure increased significantly.

CONCLUSIONThe glycan structures of serum glycoproteins are closely related to HBeAg and HBsAg seroconversion in CHB patients.It is possible that a special lectin binding glycan involving the terminal beta-D-galactose residues and core fructose may act as sugar markers associated with the disappearance of serum HBsAg during anti-HBV therapy for CHB.

Antiviral Agents ; therapeutic use ; Galactose ; Glycoproteins ; blood ; Hepatitis B e Antigens ; Hepatitis B, Chronic ; drug therapy ; Humans ; Phytohemagglutinins ; Polysaccharides ; analysis

AIMTo investigate the effects of pumpkin polysaccharides on blood glucose and lipids levels in diabetic rats.

METHODSDiabetic rats induced by alloxan through intraperitoneal injection were randomly divided into three groups, diabetes, xiaoke pill and pumpkin polysaccharides group, according to weight and blood glucose level. And the normal control group was founded at the same time. The normal control group and diabetes group were lavaged with distilled water, other two groups were respectively lavaged with xiaoke pill or pumpkin polysaccharides. Weighed once a week, and analyzed fasting blood glucose, total cholesterol, triglyceride, high density lipoprotein, low density lipoprotein, and free fatty acid level in serum after 4 weeks.

RESULTSIn diabetes group, weight and high density lipoprotein level decreased, and fasting blood glucose, total cholesterol, triglyceride, low density lipoprotein, and free fatty acid level in serum increased significantly. But, all of the indexes changed oppositely in xiaoke pill group and pumpkin polysaccharides group, and effects of pumpkin polysaccharides were better.

CONCLUSIONPumpkin polysaccharides can increase the weight, decrease the blood glucose and lipids levels in diabetic rats, and have some good effects to diabetes and diabetes complications.

Animals ; Blood Glucose ; metabolism ; Cucurbita ; chemistry ; Diabetes Mellitus, Experimental ; blood ; Hypoglycemic Agents ; pharmacology ; Lipids ; blood ; Male ; Polysaccharides ; pharmacology ; Rats ; Rats, Wistar

OBJECTIVETo study the protective effects of polysaccharide of Spirulina platensis and Sargassum thunbeergii on vascular of alloxan (ALX) induced diabetic rats.

METHODWith the doses of polysaccharide of Spirulina platensis (PSP) and Sargassum thunbeergii (PST) compound (1:1) 12.261, 36.783, 110.349 mg x kg(-1) by i.g. administration to alloxan induced diabetic rats respectively for 6 weeks. Then the blood glucose and the TC, HDL-C, TG, NO, ET in serum were detected. The contraction and relaxation response to NE and ACh in aortic rings of the alloxan induced diabetic rats has been studied.

RESULTThe results showed the compound of PSP and PST could decrease the blood glucose and the TC, TG, NO, ET in serum and increase HDL-C than in the alloxan induced diabetic rats. The contraction responses to NE in aortic rings of the alloxan induced diabetic rats were significantly elevated in the normal rats, and the responses to ACh were significantly lower. PSP and PST compound could significantly lower the responses to NE and significantly elevate the responses to ACh in aortic rings of the alloxan induced diabetic rats.

CONCLUSIONPSP and PST compound could decrease blood glucose and could protect the vascular of alloxan induced diabetic rats.

Animals ; Aorta, Thoracic ; drug effects ; Blood Glucose ; metabolism ; Cholesterol ; blood ; Cholesterol, HDL ; blood ; Cyanobacteria ; chemistry ; Diabetes Mellitus, Experimental ; blood ; Endothelins ; blood ; Female ; Male ; Mice ; Muscle Contraction ; drug effects ; Muscle, Smooth, Vascular ; drug effects ; Nitric Oxide ; blood ; Polysaccharides ; isolation & purification ; pharmacology ; Polysaccharides, Bacterial ; isolation & purification ; pharmacology ; Protective Agents ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Sargassum ; chemistry ; Triglycerides ; blood

Nonalcoholic fatty liver disease (NAFLD) is a major public health issue worldwide. Immunoglobulin G (IgG) N-glycans are associated with risk factors for NAFLD, such as obesity and diabetes. A cross-sectional study involving 500 Han Chinese adults recruited from a community in Beijing was carried out to explore the association between IgG N-glycans and NAFLD. IgG N-glycosylation was significantly associated with NAFLD, with the disease showing a negative correlation with galactosylation (GP14, GP14n, and G2n), positive correlation with fucosylation (FBG2n/G2n), and positive correlation with bisecting N-acetylglucosamine (GlcNAc) [FBG2n/FG2n and FBG2n/(FG2n+FBG2n)], after controlling age, gender, and prevalence of obesity, type 2 diabetes mellitus, hypertension, and hyperlipidemia. In other words, the present study showed a possible association between NAFLD and the loss of galactose and elevations of fucose and bisecting GlcNAc. Aberrant IgG glycosylation might therefore be a potential biomarker for the primary or secondary prevention of NAFLD.
Biomarkers ; blood ; China ; Cross-Sectional Studies ; Diabetes Mellitus, Type 2 ; blood ; complications ; Female ; Glycosylation ; Humans ; Immunoglobulin G ; blood ; Male ; Middle Aged ; Non-alcoholic Fatty Liver Disease ; blood ; etiology ; Obesity ; blood ; complications ; Odds Ratio ; Polysaccharides ; blood ; Risk Factors

OBJECTIVETo investigate the changes of serum inteferon-gamma (IFN-gamma) in mice bearing S-180 tumor and explore the role of the endogenous IFN-gamma in confining the transplanted tumor by intervention with immunomodulators.

METHODSMouse models bearing S-180 solid tumor were established and subjected to intragastric administration of Ganoderma lucidum polysaccharides (GLP) or cyclosporine A (CsA) at different daily doses for 9 consecutive days. Serum IFN-gamma levels were measured in untreated tumor-bearing mice and in those after completion of GLP or CsA treatments by enzyme-linked immunosorbent assay (ELISA), and the changes of the tumor weight in the treated mice were evaluated.

RESULTSIt was found for the first time that serum IFN-gamma levels in the tumor-bearing mice increased progressively within the initial 20 days after tumor implantation. The serum IFN-gamma levels in the 3 GLP-treated groups (at daily doses of 400, 200, and 100 mg/kg) all increased, which was the most obvious in 400 mg/kg GLP-treated group, and the tumor weight decreased significantly in response to GLP treatment, but the most conspicuous effect occurred with the daily dose of 200 mg/kg, and no significant statistical correlation was found between the two parameters. CsA treatment (at 20, 10, and 5 mg/kg, respectively) resulted in reduced serum IFN-gamma levels but produced virtually no effect on the tumor weight, and no obvious correlation was found between serum IFN-gamma level and the tumor weight.

CONCLUSIONIncreased serum IFN-gamma levels following GLP treatment are not significantly correlated to tumor growth inhibition in mice, and CsA reduces serum IFN-gamma levels without affecting the tumor weight, suggesting that endogenous IFN-gamma is not a major immunomodulating factor in growth inhibition of transplanted S-180 tumor.

Animals ; Cyclosporine ; pharmacology ; Female ; Ganoderma ; chemistry ; Immunologic Factors ; pharmacology ; Interferon-gamma ; blood ; Male ; Mice ; Polysaccharides ; pharmacology ; Sarcoma 180 ; blood ; pathology ; prevention & control ; Tumor Burden ; drug effects

OBJECTIVETo study the effects of Enshi green tea tea polysaccharide on serum glucose in experimental diabetic rats.

METHODSDiabetic rats model were established by alloxan, Enshi green tea tea polysaccharide was poured into rats' stomach for four weeks, then the changes of the level about fasting blood glucose (FBG), glucokinase (GK), insulin (INS), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), spleen index and thymus index were observed.

RESULTSEnshi green tea tea polysaccharide could reduce the level of FBG in diabetic rats, and increase the activity of KG, SOD and GSH-Px, moreover, it could reduce the level of MDA and increase the spleen index and thymus index.

CONCLUSIONEnshi green tea tea polysaccharide has remarkable effect on playing down the blood sugar, and can increase the antioxygenic activity and immunity.

Animals ; Antioxidants ; pharmacology ; Blood Glucose ; metabolism ; Diabetes Mellitus, Experimental ; blood ; Male ; Oxidative Stress ; Plant Extracts ; pharmacology ; Polysaccharides ; pharmacology ; Rats ; Rats, Wistar ; Tea ; chemistry