Structure characterization of three polysaccharides and a comparative study of their immunomodulatory activities on chicken macrophage

Fan, Wentao; Zhang, Shijie; Pān, Hào; Zheng, Pimiao; Liu, Jianzhu; Zhao, Xiaona

doi:10.1016/j.carbpol.2016.07.116

Cited by 32 publications

(11 citation statements)

References 20 publications

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“…The signals at δ71.9, δ73.1, δ69.3, δ70.4, and δ65.6 ppm are attributed to C-2, C-3, C-4, C-5, and C6 signals of (1 → 6)-α-D-Glcp, respectively [34,35]. The signals at δ100.2, δ72.7, δ72.3, δ81.2, and δ73.3 ppm are attributed to C-1, C-2, C-3, C-4, and C-5 signal peaks of (1 → 4)-GalA, respectively [36]. The signals at δ92.1, δ72.2, δ70.1, δ83.7, and δ69.0 ppm correspond to the C-1, C-2, C-3, C-4, and C-5 signal peaks of (1→)-α-D-Rha, respectively.…”

Section: Structural Analysis Of Aps By 1 H Nmr and 13 C Nmrmentioning

confidence: 97%

Structural Characterization, Antioxidant Activity, and Biomedical Application of Astragalus Polysaccharide Degradation Products

Wang

Sun

Ouyang

2018

International Journal of Polymer Science

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To study the antioxidant capacity of Astragalus polysaccharides (APS) with different molecular weights, we used hydrogen peroxide to degrade original Astragalus polysaccharide (APS0) with an initial molecular weight of 11.03 kDa and obtained three degraded polysaccharides with molecular weights of 8.38 (APS1), 4.72 (APS2), and 2.60 kDa (APS3). The structures of these polysaccharides were characterized by 1H NMR, 13C NMR, FT-IR, and GC/MS. The degradation process did not cause significant changes in the main chain structure of APS. The monosaccharide component of APS before and after degradation was slightly changed. The antioxidant ability in vitro (removing hydroxyl and ABTS radicals and reducing ability) and in cells (superoxide dismutase and malondialdehyde generation) of these polysaccharides is closely related to their molecular weight. If the molecular weight of APS is very high or low, it is not conducive to their activity. Only APS2 with moderate molecular weight showed the greatest antioxidant activity and ability to repair human kidney epithelial (HK-2) cells. Therefore, APS2 can be used as a potential antistone polysaccharide drug.

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Section: Structural Analysis Of Aps By 1 H Nmr and 13 C Nmrmentioning

confidence: 97%

Structural Characterization, Antioxidant Activity, and Biomedical Application of Astragalus Polysaccharide Degradation Products

Wang

Sun

Ouyang

2018

International Journal of Polymer Science

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“…Astragalus polysaccharide (APS) is the major active ingredient extracted from Radix Astragali , which is a popular traditional Chinese medicine. It has been reported that APS possesses various biological activities, including antioxidant, anti-inflammation, immuno-modulation, anti-viral, and anti-tumor activities [ 16 – 19 ] Recent studies reported that APS had anti-tumor properties that can modulate various cancer signaling pathways and interact with specific transcription molecules, such as Wnt, p53, and NF-κB signaling pathway [ 20 – 24 ]. However, it was unknown whether APS has anti-tumor effects or synergistic reaction with chemotherapy agents on NPC, and the underlying mechanism is unclear.…”

Section: Introductionmentioning

confidence: 99%

Chemosensitizing Effect of Astragalus Polysaccharides on Nasopharyngeal Carcinoma Cells by Inducing Apoptosis and Modulating Expression of Bax/Bcl-2 Ratio and Caspases

Zhou

Meng

2017

Med Sci Monit

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BackgroundPlatinum-based chemotherapy is the most effective regimen for nasopharyngeal carcinoma, which presents highly invasive and metastatic activity. However, the dose-related toxicity of chemotherapy agents limits the dose administration. Astragalus polysaccharide (APS) is the major active ingredient extracted from Chinese herb Radix Astragali and is proven to be active against carcinomas. We aimed to assess the chemosensitizing effects of Astragalus polysaccharides on nasopharyngeal carcinoma in vitro and in vivo and to explore the underlying mechanism.Material/MethodsWe used BALB/c nu/nu mice and human nasopharyngeal carcinoma cell lines CNE-1, CNE-2, and SUNE-1. MTT, Annexin V/PI, Western blot analysis, and TUNEL assay were carried out.ResultsAPS significantly promoted anti-proliferative and apoptotic effects of cisplatin on nasopharyngeal carcinoma cells. APS also enhanced the anti-tumor effects and cisplatin-induced apoptosis in the xenograft model. The level of Bcl-2 decreased, while the levels of Bax, caspase-3, and caspase-9 increased in cisplatin combined with APS treatment compared to cisplatin only treatment. The ratio of Bax to Bcl-2 was significantly enhanced by the APS to cisplatin.ConclusionsAPS enhanced the anti-proliferative and apoptotic effect of cisplatin by modulating expression of Bax/Bcl-2 ratio and caspases on nasopharyngeal carcinoma cells and in the xenograft model.

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“…Further analysis of structure-activity relationship showed that the molecular weight, content of uronic acid, and degree of branching of WPMP-2 were all higher than those of WPMP-1, and these factors were suggested to be the positive characteristics for the better immunostimulatory activity. In addition, many other reports also showed that uronic acid content and molecular weight might influence the activity of the polysaccharides [18,33,34]. More studies on the structure–activity relationship of the two polysaccharides will be done in the future.…”

Section: Discussionmentioning

confidence: 91%

Purification, Characterization of Two Polysaccharides from Pinelliae Rhizoma Praeparatum Cum Alumine and Their Anti-Inflammatory Effects on Mucus Secretion of Airway Epithelium

Liu

Wang

et al. 2019

IJMS

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Pinelliae Rhizoma Praeparatum cum Alumine (PRPCA) is an important traditional processed herbal medicine mainly used for treating phlegm in China for more than 2000 years. In our previous studies, extraction optimization, characterization, and bioactivities of total polysaccharides from PRPCA were investigated. In this study, further purification of these polysaccharides was performed. Two polysaccharides named neutral fraction of total polysaccharides-II (TPN-II) and acidic fraction of total polysaccharides-II (TPA-II) were obtained by gradient ion-exchange chromatography followed by gel-permeation chromatography. Results of scanning electron microscopy (SEM) analysis in the present study showed that TPN-II had a tight structure with a rough and uneven surface, while TPA-II had a relative homogeneous surface and a loose structure. Further studies indicated that TPN-II was a homosaccharide mainly composed by glucose with a molecular weight of 8.0 kDa. TPA-II was mainly composed of mannose, rhamnose, glucuronic acid, galacturonic acid, glucose, galactose and arabinose in a molar ratio of 2.1, 2.3, 1.7, 10.6, 2.6, 14.2, and 2.5, with a molecular weight of 1250 kDa. The nuclear magnetic resonance (NMR) results indicated that α and β form glycoside bonds existed in TPN-II and TPA-II, and TPN-II was composed of α-glucopyranose. In addition, both purified polysaccharides have significant anti-inflammatory effects on mucus secretion of human airway epithelial NCI-H292 cells without cytotoxicity. Compared with TPN-II, TPA-II exhibited more significant anti-inflammatory effects on lipopolysaccharide (LPS)-induced airway inflammation by regulating levels of interleukin-4 (IL-4) and interferon-γ (IFN-γ) and inhibiting mucus secretion. The results suggest that polysaccharides from PRPCA could be explored as therapeutic agents in treating inflammation and over secretion of mucus in asthma.

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Structure characterization of three polysaccharides and a comparative study of their immunomodulatory activities on chicken macrophage

Cited by 32 publications

References 20 publications

Structural Characterization, Antioxidant Activity, and Biomedical Application of Astragalus Polysaccharide Degradation Products

Structural Characterization, Antioxidant Activity, and Biomedical Application of Astragalus Polysaccharide Degradation Products

Chemosensitizing Effect of Astragalus Polysaccharides on Nasopharyngeal Carcinoma Cells by Inducing Apoptosis and Modulating Expression of Bax/Bcl-2 Ratio and Caspases

Purification, Characterization of Two Polysaccharides from Pinelliae Rhizoma Praeparatum Cum Alumine and Their Anti-Inflammatory Effects on Mucus Secretion of Airway Epithelium

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