Purification, structural characterization and immunostimulatory activity of polysaccharides from Umbilicaria esculenta

Shi, Yang; Ye, Yunfang; Zhang, Bi-Wei; Liu, Yong; Wang, Junhui

doi:10.1016/j.ijbiomac.2021.03.176

Cited by 28 publications

(19 citation statements)

References 54 publications

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“…The cross peak at 69.57–95.82 ppm in the heterospectral region of the HSQC spectrum was, tentatively, Man p (Residue D). The chemical shifts of H-1, H-2, H-3, H-4, H-5, and H-6 were obtained from the COSY spectrum at 4.98, 3.73, 4.02, 4.23, 3.56, and 3.68 ppm, respectively, which was consistent with other reports ( 43 ). According to the chemical shift of protons in the HSQC spectrum, the carbon chemical shift of Residue C from C-1 to C-6 was determined ( Table 2 ).…”

Section: Resultssupporting

confidence: 91%

“…Table 2 summarized the proton and carbon assignments of the four main residues in PAP1b based on the chemical shift data obtained from HSQC (Figure 3C), 1 H-1 H COSY (Figure 3D), NOESY (Figure 3E), and HMBC (Figure 3F The cross peak at 69.57-95.82 ppm in the heterospectral region of the HSQC spectrum was, tentatively, Manp (Residue D). The chemical shifts of H-1, H-2, H-3, H-4, H-5, and H-6 were obtained from the COSY spectrum at 4.98, 3.73, 4.02, 4.23, 3.56, and 3.68 ppm, respectively, which was consistent with other reports (43). According to the chemical shift of protons in the HSQC spectrum, the carbon chemical shift of Residue C from C-1 to C-6 was determined (Table 2).…”

Section: Nmr Spectroscopy Of Pap1bsupporting

confidence: 91%

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Structural Elucidation and Antioxidant Activities of a Neutral Polysaccharide From Arecanut (Areca catechu L.)

Guo

Pan³

et al. 2022

Front. Nutr.

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A novel neutral polysaccharide designated as PAP1b was isolated from Areca catechu L. by hot water extraction, ethanol precipitation, and column chromatography. PAP1b was mainly composed of mannose, galactose, xylose, and arabinose in a ratio of 4.1:3.3:0.9:1.7, with an average molecular weight of 37.3 kDa. Structural characterization indicated that the backbone of PAP1b appeared to be composed mainly of → 6-β-Manp-(1 →, → 4)-α-Galp-(1 → and → 3,6)-β-Manp-(1 →) residues with some branches, and terminal of (1 →)-linked-β-Manp residues. The results of bioactivity experiments showed that PAP1b had antioxidant in vitro, esspecially on scavenging DPPH and hydroxyl radicals. Therefore, the polysaccharide from Areca catechu L. could be used as a potential antioxidant in functional food.

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Section: Resultssupporting

confidence: 91%

Section: Nmr Spectroscopy Of Pap1bsupporting

confidence: 91%

Structural Elucidation and Antioxidant Activities of a Neutral Polysaccharide From Arecanut (Areca catechu L.)

Guo

Pan³

et al. 2022

Front. Nutr.

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“…26,27 The activation of such pathways induces the release of pro-and antiinflammatory mediators, leading to immunomodulation, anti-tumor, wound-healing, and other therapeutic effects. 25,[28][29][30] Senegalia macrostachya (Reichenb. ex DC.)…”

Section: Introductionmentioning

confidence: 99%

Immunomodulatory activity ofSenegalia macrostachya(Reichenb. ex DC.) Kyal. & Boatwr seed polysaccharide fraction through the activation of the MAPK signaling pathway in RAW264.7 macrophages

et al. 2022

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“…PCP and SEPCP were methylated and analyzed by GC–MS using the method described in the reference (Shi et al, 2021).…”

Section: Methodsmentioning

confidence: 99%

Effect of steam explosion pretreatment on polysaccharide isolated from Poria cocos : Structure and immunostimulatory activity

Liang

Zhao

Xie

et al. 2022

Journal of Food Biochemistry

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This study aimed to examine the effects of steam explosion (SE) pretreatment on the structural characteristics and immunostimulatory activity of polysaccharide from Poria cocos. Results showed that the average molecular weights of native polysaccharide (PCP) and SE-pretreated polysaccharide (SEPCP) were 18.67 and 6.52 kDa, respectively. PCP and SEPCP shared the same profiles of monosaccharides (mannose, glucose, galactose, and fucose) in different composition ratios, that is, PCP in a molar

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Purification, structural characterization and immunostimulatory activity of polysaccharides from Umbilicaria esculenta

Cited by 28 publications

References 54 publications

Structural Elucidation and Antioxidant Activities of a Neutral Polysaccharide From Arecanut (Areca catechu L.)

Structural Elucidation and Antioxidant Activities of a Neutral Polysaccharide From Arecanut (Areca catechu L.)

Immunomodulatory activity ofSenegalia macrostachya(Reichenb. ex DC.) Kyal. & Boatwr seed polysaccharide fraction through the activation of the MAPK signaling pathway in RAW264.7 macrophages

Effect of steam explosion pretreatment on polysaccharide isolated from Poria cocos : Structure and immunostimulatory activity

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