CHEMISTRY & BIODIVERSITY
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2025
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IF 2.5
Hao Xie,Nurmamat Eliyas
To address the low extraction yield and structural degradation issues of conventional methods, this study optimized microwave-assisted extraction (61°C, 64 min, 30:1 mL/g ratio) to obtain Inonotus obliquus polysaccharides (IOP), followed by DEAE-52 and Sephadex G-100 purification to isolate two fractions: neutral IOP-1 (12.67 kDa) and acidic IOP-2 (26.13 kDa). Monosaccharide analysis revealed both as heteropolysaccharides containing mannose, glucose, and galactose with distinct compositional ratios. Structural characterization showed IOP-1 primarily contains 1,4-Glcp, 1,3,6-Glcp, and 1,3-Manp linkages, while IOP-2 features 1,3-Glcp, 1,4-Glcp, 1,4,6-Glcp, and 1,4-Galp linkages. Multiple antioxidant assays demonstrated superior free radical scavenging capacity in both polysaccharides, with IOP-1 exhibiting exceptional activity exceeding typical polysaccharides performance. These findings highlight IOP-1's potential as a novel natural antioxidant for pharmaceutical and food applications. Graphical
研究领域:
食品科学
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药学
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生物化学
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天然产物化学
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分析化学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Yiting Yang,Ping Ren,Ying Sun,Junyi Li,Xinjun Zhou,Haipeng Zhang,Chengguang He,Huining Dai,Lili Guan
Nostoc commune Vaucher, a terrestrial and benthic blue-green alga, widely used in food and medicine worldwide. N. commune Polysaccharides (NCVP) have excellent biological activities, especially immunomodulatory, hypoglycemic and anti-tumor activities. However, the mechanism and structure-activity relationship of NCVP has been less studied. In this study, based on methylation and NMR results, a novel polysaccharide NCVP2 with 135 kDa, containing→4)-α-D-Gal p -(1→, → 4)-β-D-Glc p -(1→, and →4)-α-D-Xyl p -(1→ residues as the backbon, was sequentially purified from N.commune by DEAE-52 and Sephadex G-100 column. NCVP2 (50 μg/mL) exhibited the strong in vitro immunomodulatory activity by promoting the generation of nitric oxide ( NO ) and reactive oxygen species (ROS). A total of 2048 differentially expressed genes (DEGs) were identified by RNA-seq, including 1019 down-regulated genes and 1065 up-regulated genes. These DEGs were mainly enriched in the immune-related biological processes, involving in Mitogen-activated protein kinase (MAPK) and Toll-like receptor (TLR) signaling pathways by GO and KEGG enrichment analysis. Furthermore, Western blot results proved NCVP2 could recognize TLR2 and TLR4/MD2, and regulate TLR7/IRF7, MAPK and PI3K/AKT signaling pathways. In summary, a novel polysaccharide NCVP2 from N.commun e was proposed to exhibit significant immunomodulatory effects with multiple-paths and targets, and has great potential in the development of healthy foods such as immunomodulators.
研究领域:
免疫学
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生物化学
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药理学
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分子生物学
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植物科学
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2015
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IF 4.074
Wuxia Zhang,Dan Song,Dan Xu,Tingting Wang,Lu Chen,Jinyou Duan
Rhizoma Acori Tatarinowii is widely used in traditional Chinese medicine. In this study, three novel polysaccharides designated RATPW, RATPS1 and RATPS2 were isolated from Rhizoma Acori Tatarinowii by DEAE-52 cellulose chromatography. Their structures were characterized using physicochemical and spectral methods. Chemical analysis indicated that RATPW (6.5 × 10 3 Da) mainly composed of glucose and fructose. RATPS1 (1.5 × 10 5 Da) contained galactose and arabinose, while RATPS2 (5.3 × 10 4 Da) contained ∼49.5% galacturonic acid along with rhamnose, fructose, galactose, and arabinose. In vitro , RATPS2 showed the most significant scavenging activity on DPPH and hydroxyl radical. Three polysaccharides could protect the PC12 cells from H 2 O 2 -induced damage. Immunological tests indicated that both RATPW and RATPS2 significantly stimulated NO production and phagocytic activity in RAW264.7, and promoted splenocyte proliferation. These data suggested that polysaccharides RATPW and RATPS2 had the potential as novel natural sources of antioxidative and immunopotentiating agents.
研究领域:
药理学
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生物化学
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免疫学
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传统中药
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DOI
PubMed
高影响因子
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
·
2025
·
IF 1.9
Menglu Li,Ruotong He,Ceyao Yang,Hao Chen,Chaoling Wu,Xiaomiao Zhang,Xin Fu,Chengbo Lu,Liu Yang,Shi Liu,Yi Zhang
Lilium brownii F.E.Brown var. viridulum Baker (Longya Baihe), a traditional medicinal and edible plant. In order to study the activity of its polysaccharide extracts, a three-factor three-level Box-Behnken response surface design was employed to optimize the extraction process. The optimal extraction conditions include: liquid-solid ratio of 32:1 mL/g, extraction temperature of 70 °C, and extraction time of 3.5 h. The purified Longya Baihe polysaccharide (LP), obtained via DEAE-52 cellulose chromatography, was structurally characterized by molecular weight distribution, monosaccharide composition and infrared spectrum. The results show that LP was a macromolecular polysaccharide composed of glucose and mannose (molar ratio of 1:1.56), with an average molecular mass (Mn) of 24.006 kDa. In vitro assays demonstrated its excellent antioxidant and anti-inflammatory activities. LP significantly inhibited lipopolysaccharide (LPS)-induced activation of the nuclear factor kappa-B (NF-κB) pathway in RAW264.7 cells, downregulated the overexpression of nitric oxide (NO), interleukin (IL)-6, inducible nitric oxide synthase (iNOS) and tumor necrosis factor (TNF)-α, and enhancing the levels of the anti-inflammatory factor interleukin (IL)-10. This study suggests LP holds promise as a natural antioxidant and anti-inflammatory agent for potential development and application.
研究领域:
植物化学
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天然产物化学
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生物活性多糖
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食品科学与技术
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生药学
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炎症研究
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuai Chen,Liang Wang,Shuang Rong,Yuyuan Duan,Huizhu Wang
This study aimed to optimize the extraction process of polysaccharides from Rosa laevigata Michx. (RLMP) using an ultrasound-microwave-assisted method and investigate its in vitro hypoglycemic activity. Key factors affecting RLMP yield were identified using a Plackett–Burman design, followed by a Box–Behnken design and response–surface methodology, to determine the optimal extraction conditions. RLMP was purified using DEAE-52 cellulose, yielding two homogeneous fractions: RLMP-1 and RLMP-2. Monosaccharide composition was analyzed by gas chromatography, and structural characterization of RLMP, RLMP-1, and RLMP-2 was performed using FT-IR, SEM, and TEM. Methylation analysis and NMR were used to elucidate the sugar-chain structure of RLMP-1. In vitro hypoglycemic activity analysis showed that RLMP improved the glucose consumption and glycogen synthesis and enhanced the activities of pyruvate kinase and hexokinase in IR-HepG2 cells. Moreover, RLMP significantly increased the activities of antioxidant enzymes, such as CAT, SOD, and GSH-Px and decreased those of ROS and MDA. Western blotting analysis confirmed that RLMP enhances glucose and lipid metabolism and reduces oxidative stress by activating the PI3K/Akt/GLUT-4 signaling pathway, thereby exerting its hypoglycemic effect. These findings suggest that RLMP is a promising candidate for developing novel antioxidant agents or hypoglycemic drugs.
研究领域:
药理学
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生物化学
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分子生物学
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食品科学
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药物化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Meng-Ting Kuang,Jing-Yue Xu,Jin-Yu Li,Liu Yang,Bo Hou,Qi Zhao,Jiang-Miao Hu
A novel polysaccharide (MSP-1) was isolated from the fruiting body of Morchella sextelata and purified using DEAE-52 and Sephadex G-75. The molecular weight of MSP-1 was 1.17 × 10 4 Da, as detected by HPLC analysis. The monosaccharide composition of MSP-1 was mannose and glucose at a ratio of 1.00: 1.25. Methylation and NMR results revealed that the backbone of MSP-1 was composed of →4)- β -D-Man p -(1→, →4)- β -D-Glc p -(1→, →4)- α -D-Glc p -(1→, and →4, 6)- α -D-Glc p -(1→. SEM images of MSP-1 presented a dense network structure with porous characterizations. The immunomodulatory activities of MSP-1 were evaluated using RAW264.7 cells, and the results showed that MSP-1 promoted proliferative and phagocytic activity and increased the production of NO, TNF- α and IL-6. These results indicated that MSP-1 exhibited significant immunomodulatory activities.
研究领域:
真菌学
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免疫学
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生物化学
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DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 9
·2076
·
IF 4.2
Ruiding Wen,Lu Luo,Runcheng Zhang,Xudong Zhou,Wei Wang,Limin Gong
A neutralPolygonatumcyrtonemapolysaccharide (NPCP) was isolated and purified fromPolygonatumcyrtonemaby various chromatographic techniques, including DEAE-52 and Sephadex-G100 chromatography. The structure of NPCP was characterized by HPLC, HPGPC, GC-MS, FT-IR, NMR, and SEM. Results showed that NPCP is composed of glucose (55.4%) and galactose (44.6%) with a molecular weight of 3.2 kDa, and the sugar chain of NPCP was →1)-α-D-Glc-(4→1)-β-D-Gal-(3→. In vitro bioactivity experiments demonstrated that NPCP significantly enhanced macrophages proliferation and phagocytosis while inhibiting the M1 polarization induced by LPS as well as the M2 polarization induced by IL-4 and IL-13 in macrophages. Additionally, NPCP suppressed the secretion of IL-6 and TNF-α in both M1 and M2 cells but promoted the secretion of IL-10. These results suggest that NPCP could serve as an immunomodulatory agent with potential applications in anti-inflammatory therapy.
研究领域:
药理学
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免疫学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）