Combined Lycium babarum polysaccharides and C-phycocyanin increase gastric Bifidobacterium relative abundance and protect against gastric ulcer caused by aspirin in rats
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01.12.2021 |
Hsieh S.Y.
Lian Y.Z.
Lin I.H.
Yang Y.C.
Tinkov A.A.
Skalny A.V.
Chao J.C.J.
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Nutrition and Metabolism |
10.1186/s12986-020-00538-9 |
0 |
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© 2021, The Author(s). Background: Non-steroidal anti-inflammatory drugs such as aspirin are used for the treatment of cardiovascular disease. Chronic use of low-dose aspirin is associated with the occurrence of gastric ulcer. The aim of this study was to investigate the healing potential of Lycium barbarum polysaccharides (LBP) from Chinese Goji berry and C-phycocyanin (CPC) from Spirulina platensis on gastric ulcer in rats. Methods: Male Sprague–Dawley rats were divided into five groups: normal, aspirin (700 mg/kg bw), LBP (aspirin + 100 mg/kg bw/d LBP), CPC (aspirin + 50 mg/kg bw/d CPC), and MIX (aspirin + 50 mg/kg bw/d LBP + 25 mg/kg bw/d CPC) groups. Gastric ulcer was developed by daily oral feeding of aspirin for 8 weeks. Treatments were given orally a week before ulcer induction for 9 weeks. Results: The MIX group elevated gastric cyclooxygenase-1, prostaglandin E2, and total nitrite and nitrate levels by 139%, 86%, and 66%, respectively, compared with the aspirin group (p < 0.05). Moreover, the MIX group reduced lipid peroxides malondialdehyde levels by 78% (p < 0.05). The treatment of LBP and/or CPC increased gastric Bifidobacterium relative abundance by 2.5–4.0 times compared with the aspirin group (p < 0.05). Conclusions: We conclude that combined LBP and CPC enhance gastroprotective factors, inhibit lipid peroxidation, and increase gastric Bifidobacterium relative abundance. Combined LBP and CPC have protective potential against gastric ulcer caused by aspirin in rats.
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Combined Lycium babarum polysaccharides and C-phycocyanin increase gastric Bifidobacterium relative abundance and protect against gastric ulcer caused by aspirin in rats
|
01.12.2021 |
Hsieh S.Y.
Lian Y.Z.
Lin I.H.
Yang Y.C.
Tinkov A.A.
Skalny A.V.
Chao J.C.J.
|
Nutrition and Metabolism |
10.1186/s12986-020-00538-9 |
0 |
Ссылка
© 2021, The Author(s). Background: Non-steroidal anti-inflammatory drugs such as aspirin are used for the treatment of cardiovascular disease. Chronic use of low-dose aspirin is associated with the occurrence of gastric ulcer. The aim of this study was to investigate the healing potential of Lycium barbarum polysaccharides (LBP) from Chinese Goji berry and C-phycocyanin (CPC) from Spirulina platensis on gastric ulcer in rats. Methods: Male Sprague–Dawley rats were divided into five groups: normal, aspirin (700 mg/kg bw), LBP (aspirin + 100 mg/kg bw/d LBP), CPC (aspirin + 50 mg/kg bw/d CPC), and MIX (aspirin + 50 mg/kg bw/d LBP + 25 mg/kg bw/d CPC) groups. Gastric ulcer was developed by daily oral feeding of aspirin for 8 weeks. Treatments were given orally a week before ulcer induction for 9 weeks. Results: The MIX group elevated gastric cyclooxygenase-1, prostaglandin E2, and total nitrite and nitrate levels by 139%, 86%, and 66%, respectively, compared with the aspirin group (p < 0.05). Moreover, the MIX group reduced lipid peroxides malondialdehyde levels by 78% (p < 0.05). The treatment of LBP and/or CPC increased gastric Bifidobacterium relative abundance by 2.5–4.0 times compared with the aspirin group (p < 0.05). Conclusions: We conclude that combined LBP and CPC enhance gastroprotective factors, inhibit lipid peroxidation, and increase gastric Bifidobacterium relative abundance. Combined LBP and CPC have protective potential against gastric ulcer caused by aspirin in rats.
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Unsaturated and thiolated derivatives of polysaccharides as functional matrixes for tissue engineering and pharmacology: A review
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01.05.2021 |
Farion I.A.
Burdukovskii V.F.
Kholkhoev B.C.
Timashev P.S.
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Carbohydrate Polymers |
10.1016/j.carbpol.2021.117735 |
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© 2021 Elsevier Ltd This review examines investigations into the functionalization of polysaccharides by substituents containing multiple (C[dbnd]C) bonds and thiol (SH) groups that are prone to (co)polymerization in the presence of thermal, redox and photoinitiators or Michael addition reactions. A comparative analysis of the approaches to grafting the mentioned substituents onto the polysaccharide macromolecules was conducted. The use of the modified polysaccharides for the design of the 3D structures, including for the development of the pore bearing matrixes of cells or scaffolds utilized in regenerative medicine was examined. These modified polymers were also examined toward the design of excipient matrixes in pharmacological compositions, including with controllable release of active pharmaceuticals, as wel as of antibacterial and antifungal agents and others. In addition, a few examples of the use of modified derivatives in other areas are given.
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Effect of lipopolysaccharide structure on functional response of whole blood cells
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01.01.2021 |
Zubova S.V.
Grachev S.V.
Prokhorenko I.R.
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Immunobiology |
10.1016/j.imbio.2020.152030 |
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© 2020 Elsevier GmbH Lipopolysaccharides (LPSs) induce a wide spectrum of functional activities after interaction with blood cells. Effect of structure of toxic LPS from S- and Re-chemotypes of E. coli and/or non-toxic LPS of Rhodobacter capsulatus PG (R. caps.) on activation of neutrophils and monocytes of human whole blood were studied, particularly, expression of TLR4, CD14 and CD11b receptors, phagocytosis of BioParticles Alexa Fluor 488, synthesis of cytokines and chemokines. A leading role of CD11b receptor in phagocytic activity of neutrophils primed by LPS from various E. coli chemotypes was shown. The non-toxic LPS of R. caps. does not affect the efficiency of phagocytosis activity of the neutrophils. The LPS of R. caps. was shown to induce production of TRIF-dependent cytokine IFN-β in human whole blood leukocytes selectively, without activating MyD88-dependent pathway of pro-inflammatory cytokine synthesis, displaying properties of patrial agonist of TLR4. Structure and biological activity of LPS R. caps. allows considering it as a promising immunity stimulating pharmacological agent.
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Effect of lipopolysaccharide structure on functional response of whole blood cells
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01.01.2021 |
Zubova S.V.
Grachev S.V.
Prokhorenko I.R.
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Immunobiology |
10.1016/j.imbio.2020.152030 |
0 |
Ссылка
© 2020 Elsevier GmbH Lipopolysaccharides (LPSs) induce a wide spectrum of functional activities after interaction with blood cells. Effect of structure of toxic LPS from S- and Re-chemotypes of E. coli and/or non-toxic LPS of Rhodobacter capsulatus PG (R. caps.) on activation of neutrophils and monocytes of human whole blood were studied, particularly, expression of TLR4, CD14 and CD11b receptors, phagocytosis of BioParticles Alexa Fluor 488, synthesis of cytokines and chemokines. A leading role of CD11b receptor in phagocytic activity of neutrophils primed by LPS from various E. coli chemotypes was shown. The non-toxic LPS of R. caps. does not affect the efficiency of phagocytosis activity of the neutrophils. The LPS of R. caps. was shown to induce production of TRIF-dependent cytokine IFN-β in human whole blood leukocytes selectively, without activating MyD88-dependent pathway of pro-inflammatory cytokine synthesis, displaying properties of patrial agonist of TLR4. Structure and biological activity of LPS R. caps. allows considering it as a promising immunity stimulating pharmacological agent.
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Coating of polylactide films by chitosan: Comparison of methods
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15.01.2020 |
Demina T.
Frolova A.
Istomin A.
Kotova S.
Piskarev M.
Bardakova K.
Yablokov M.
Altynov V.
Kravets L.
Gilman A.
Akopova T.
Timashev P.
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Journal of Applied Polymer Science |
10.1002/app.48287 |
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© 2019 Wiley Periodicals, Inc. Control over biomaterials surface characteristics through surface modification or deposition of coatings is one of the key aspects of tissue engineering. This work was aimed to evaluate an effectiveness of various methods of chitosan-coating formations onto polylactide films using a number of techniques, such as vacuum deposition by electron-beam sputtering, chemical entrapment method, and electrospray procedure. Differently coated films were studied in terms of surface morphology (scanning electron and atomic-force microscopy), chemical structure (FTIR and X-ray photoelectron spectroscopy), and hydrophilic/hydrophobic balance (goniometry). The effect of coating technique on homogeneity of chitosan distribution over the substrate surface was evaluated using genipin and fluorescein isothiocyanate labeling as well as FTIR-microscopy. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48287.
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Development and Validation of an Express Technique for Isolation and Quantitative Determination of Water-Soluble Polysaccharides from Roots of Taraxacum Officinale Wigg.
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01.07.2018 |
D’yakova N.
Slivkin A.
Samylina I.
Gaponov S.
Myndra A.
Shushunova T.
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Pharmaceutical Chemistry Journal |
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© 2018, Springer Science+Business Media, LLC, part of Springer Nature. An express technique for isolation and quantitative determination of water-soluble polysaccharides from roots of Taraxacum officinaleWigg. was developed and allowed the assay time to be shortened to 3.5 h. The developed technique was validated for precision, accuracy, robustness, and linearity and was demonstrated to be precise under repeatable conditions, accurate, and robust. The precipitate mass was strictly linearly dependent on the analyzed raw-material mass for gravimetric determination of water-soluble polysaccharides from roots of T. officinale. The technique could be used for express quality control of T. officinale roots and for commercial production of inulin from this raw material.
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Effect of various agents on the direction of THP-1 cell differentiation
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01.01.2018 |
Zubova S.
Radzyukevich Y.
Grachev S.
Prokhorenko I.
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Serbian Journal of Experimental and Clinical Research |
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© 2018, University of Kragujevac, Faculty of Science. All rights reserved. The ability of physiological (1α,25-dihydroxyvitamin D3, retinoic acid) and non-physiological (various LPS) agents and their combinations to influence the direction of pro-monocytic THP-1 cell differentiation was studied. The differentiating activity of the agents was evaluated by the expression and the ratio of surface receptors (TLR4, CD11b, and CD14) as well as by the change in THP-1 cell phagocytic activity of different degree of differentiation by Flow cytometry. The THP-1 cell differentiation by VD3 was shown to lead probably to the formation of classical monocytes. Summarizing we can conclude that VD3 induces the THP-1 cells differentiation with the formation of classical monocytes and the sequence of 1α, 25-dihydroxyvitamin D3 and non-toxic LPS R. capsulatus PG causes the THP-1 cells differentiation with the formation of inflammatory or intermediate monocytes.
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