1
|
Yermak IM, Volod’ko AV, Khasina EI, Davydova VN, Chusovitin EA, Goroshko DL, Kravchenko AO, Solov’eva TF, Maleev VV. Inhibitory Effects of Carrageenans on Endotoxin-Induced Inflammation. Mar Drugs 2020; 18:E248. [PMID: 32397584 PMCID: PMC7281451 DOI: 10.3390/md18050248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 04/24/2020] [Accepted: 05/08/2020] [Indexed: 02/07/2023] Open
Abstract
The inhibitory effects of carrageenans (CRGs) on lipopolysaccharide (LPS) induced inflammation in a mouse model of endotoxemia and in complex therapy of patients with enteric infections of Salmonella etiology were studied. The atomic force microscopy (AFM) examination of LPS and its mixture with CRGs showed that the LPS morphology is significantly changed under the action of κ- and κ/β-CRGs. CRGs were able to increase the synthesis of anti-inflammatory interleukin 10 (IL-10) in vitro, and, at low concentrations, their activity in the mixture with LPS was higher. The protective effect of CRGs against Escherichia coli LPS was studied in vivo by monitoring the biochemical and pathomorphological parameters. The κ- and κ/β-CRGs and food supplement "Carrageenan-FE" increased the nonspecific resistance of mice to E. coli LPS at the expense of the inhibition of processes of thymus involution, adrenals hypertrophy, thyroid atrophy, hypercorticoidism, glycogenolysis, and lactate acidosis. The estimation of the therapeutic action of food supplement Carrageenan-FE in complex therapy of patients with enteric infections of Salmonella etiology is given. Carrageenan-FE restores the system of hemostasis and corrects some biochemical indicators and parameters in the immune systems of patients. These results allow us to hope for the practical application of CRGs for lowering the endotoxemia level in patients under the development of the infectious process caused by Gram-negative bacteria.
Collapse
Affiliation(s)
- Irina M. Yermak
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia; (A.V.V.); (V.N.D.); (A.O.K.); (T.F.S.)
| | - Aleksandra V. Volod’ko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia; (A.V.V.); (V.N.D.); (A.O.K.); (T.F.S.)
| | - Eleonora I. Khasina
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia;
| | - Viktoriya N. Davydova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia; (A.V.V.); (V.N.D.); (A.O.K.); (T.F.S.)
| | - Evgeniy A. Chusovitin
- Institute for Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, 5 Radio St., Vladivostok 690041, Russia; (E.A.C.); (D.L.G.)
| | - Dmitry L. Goroshko
- Institute for Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, 5 Radio St., Vladivostok 690041, Russia; (E.A.C.); (D.L.G.)
- Far Eastern Federal University, 8 Sukhanova St., Vladivostok 690950, Russia
| | - Anna O. Kravchenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia; (A.V.V.); (V.N.D.); (A.O.K.); (T.F.S.)
| | - Tamara F. Solov’eva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia; (A.V.V.); (V.N.D.); (A.O.K.); (T.F.S.)
| | - Victor V. Maleev
- Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Welfare, 3a, Novogireyevskaya St., Moscow 111123, Russia;
| |
Collapse
|
2
|
Kononova SV, Volod'ko AV, Petrova VA, Kruchinina EV, Baklagina YG, Chusovitin EA, Skorik YA. Pervaporation multilayer membranes based on a polyelectrolyte complex of λ-carrageenan and chitosan. Carbohydr Polym 2017; 181:86-92. [PMID: 29254046 DOI: 10.1016/j.carbpol.2017.10.050] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 10/12/2017] [Accepted: 10/12/2017] [Indexed: 11/16/2022]
Abstract
A polyelectrolyte complex (PEC) was prepared from chitosan (CS) and λ-carrageenan (λ-CAR) using a layer-by-layer deposition of polyion solutions on a plated nonporous support. This material was then used as a multilayer membrane for the pervaporation separation of aqueous ethanol solutions. The fabricated complex film (25-30μm thick) was a multilayer system (λ-CAR-PEC-CS) containing a polycation CS (MW 3.1×105, DDА 0.93), a polyanion λ-CAR (MW 3.5×105, extracted from the alga Chondrus armatus), and a PEC layer formed between the two polyion layers. X-ray diffraction indicated a significant structuring of the film in the region of the composite PEC-CS bilayer. The structural and morphological characteristics of the CS surface in the multilayer membrane, as revealed by atomic force microscopy, were close to the characteristics of the dense CS film. However, this structure changed following pervaporation (i.e., the distinct spherical structures on the surface disappeared). Similarly, the initially loose surface of λ-CAR in the composite changed to an ordered domain after pervaporation. The transport properties of the pervaporation membranes were tested by examining the separation of ethanol-water mixtures of different compositions. The flux increased with an increase in the weight percentage of water in the feed mixture, but the separation capacity of the membrane was unchanged. In a range of feed concentrations of 50-94wt%, the membrane mainly releases water with a corresponding concentration in the permeate of 99.9-99.8wt% and substantial fluxes of 0.003-1.130kgm-2h-1 at 40°C. The obtained results indicate significant prospects for the use of non-gelling type CARs for the formation of highly effective pervaporation membranes.
Collapse
Affiliation(s)
- Svetlana V Kononova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Aleksandra V Volod'ko
- Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, Pr. 100-letiya Vladivostoka 159, Vladivostok 690022, Russian Federation
| | - Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Elena V Kruchinina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Yulia G Baklagina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation
| | - Evgeniy A Chusovitin
- Institute for Automation and Control Processes, Far Eastern Branch of the Russian Academy of Sciences, ul. Radio 5, Vladivostok 690041, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. VO 31, St. Petersburg 199004, Russian Federation; Institute of Experimental Medicine, Almazov National Medical Research Centre, Akkuratova ul. 2, St. Petersburg 197341, Russian Federation; Tyumen State University, ul. Volodarskogo 6, Tyumen 625003, Russian Federation.
| |
Collapse
|
3
|
Shevlyagin AV, Goroshko DL, Chusovitin EA, Galkin KN, Galkin NG, Gutakovskii AK. Enhancement of the Si p-n diode NIR photoresponse by embedding β-FeSi2 nanocrystallites. Sci Rep 2015; 5:14795. [PMID: 26434582 PMCID: PMC4593177 DOI: 10.1038/srep14795] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 09/09/2015] [Indexed: 11/29/2022] Open
Abstract
By using solid phase epitaxy of thin Fe films and molecular beam epitaxy of Si, a p+-Si/p-Si/β-FeSi2 nanocrystallites/n-Si(111) diode structure was fabricated. Transmission electron microscopy data confirmed a well-defined multilayered structure with embedded nanocrystallites of two typical sizes: 3–4 and 15–20 nm, and almost coherent epitaxy of the nanocrystallites with the Si matrix. The diode at zero bias conditions exhibited a current responsivity of 1.7 mA/W, an external quantum efficiency of about 0.2%, and a specific detectivity of 1.2 × 109 cm × Hz1/2/W at a wavelength of 1300 nm at room temperature. In the avalanche mode, the responsivity reached up to 20 mA/W (2% in terms of efficiency) with a value of avalanche gain equal to 5. The data obtained indicate that embedding of β-FeSi2 nanocrystallites into the depletion region of the Si p-n junction results in expansion of the spectral sensitivity up to 1600 nm and an increase of the photoresponse by more than two orders of magnitude in comparison with a conventional Si p-n junction. Thereby, fabricated structure combines advantage of the silicon photodiode functionality and simplicity with near infrared light detection capability of β-FeSi2.
Collapse
Affiliation(s)
- A V Shevlyagin
- Institute of Automation and Control Processes FEB RAS, Radio St. 5, 690041 Vladivostok, Russia
| | - D L Goroshko
- Institute of Automation and Control Processes FEB RAS, Radio St. 5, 690041 Vladivostok, Russia.,Far Eastern Federal University, School of Natural Sciences, Sukhanova St. 8, 690950 Vladivostok, Russia
| | - E A Chusovitin
- Institute of Automation and Control Processes FEB RAS, Radio St. 5, 690041 Vladivostok, Russia
| | - K N Galkin
- Institute of Automation and Control Processes FEB RAS, Radio St. 5, 690041 Vladivostok, Russia.,Far Eastern Federal University, School of Natural Sciences, Sukhanova St. 8, 690950 Vladivostok, Russia
| | - N G Galkin
- Institute of Automation and Control Processes FEB RAS, Radio St. 5, 690041 Vladivostok, Russia.,Far Eastern Federal University, School of Natural Sciences, Sukhanova St. 8, 690950 Vladivostok, Russia
| | - A K Gutakovskii
- Rzhanov Institute of Semiconductor Physics, SB RAS, Lavrentieva Ave.1, 630090 Novosibirsk, Russia.,Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
| |
Collapse
|
4
|
Davydova VN, Volod'ko AV, Sokolova EV, Chusovitin EA, Balagan SA, Gorbach VI, Galkin NG, Yermak IM, Solov'eva TF. The supramolecular structure of LPS-chitosan complexes of varied composition in relation to their biological activity. Carbohydr Polym 2015; 123:115-21. [PMID: 25843841 DOI: 10.1016/j.carbpol.2015.01.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 01/13/2015] [Accepted: 01/15/2015] [Indexed: 10/24/2022]
Abstract
The complexes of chitosan (Ch) with lipopolysaccharides (LPSs) from Escherichia coli O55:B5 (E-LPS) and Yersinia pseudotuberculosis 1B 598 (Y-LPS) of various weight compositions were investigated using quasi-elastic light scattering, ζ-potential distribution assay and atomic force microscopy. The alteration of ζ-potential of E-LPS-Ch complexes from negative to positive values depending on Ch content was detected. The Y-LPS-Ch complexes had similar positive ζ-potentials regardless of Ch content. The transformation of the supramolecular structure of E-LPS after binding with to Ch was revealed. Screening of E-LPS and Y-LPS particles by Ch in the complexes with high polycation was detected. The ability of LPS-Ch complex to induce biosynthesis of TNF-α and reactive oxygen species in stimulated human mononuclear cells was studied. A significant decrease in activity complexes compared to that of the initial LPS was observed only for E-LPS-Ch complexes.
Collapse
Affiliation(s)
- V N Davydova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia.
| | - A V Volod'ko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia
| | - E V Sokolova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia
| | - E A Chusovitin
- Institute of Automation and Control Processes, Far Eastern Branch of Russian Academy of Sciences, Radio Str. 5, Vladivostok 690041, Russia
| | - S A Balagan
- Institute of Automation and Control Processes, Far Eastern Branch of Russian Academy of Sciences, Radio Str. 5, Vladivostok 690041, Russia
| | - V I Gorbach
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia
| | - N G Galkin
- Institute of Automation and Control Processes, Far Eastern Branch of Russian Academy of Sciences, Radio Str. 5, Vladivostok 690041, Russia; Far Eastern Federal University, Sukhanova Str. 8, Vladivostok 690091, Russia
| | - I M Yermak
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia
| | - T F Solov'eva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, Vladivostok 690022, Russia
| |
Collapse
|
5
|
Galkin NG, Goroshko DL, Polyarnyi VO, Chusovitin EA, Korobtsov VV, Balashev VV, Khang Y, Dozsa L, Gutakovsky AK, Latyshev AV, Shamirzaev TS, Zhuravlev KS. Investigation of multilayer silicon structures with buried iron silicide nanocrystallites: growth, structure, and properties. J Nanosci Nanotechnol 2008; 8:527-534. [PMID: 18464366 DOI: 10.1166/jnn.2008.a093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The growth of nanosize islands of iron silicides on Si(100) substrates and epitaxial silicon overgrowth atop them have been studied by low energy electron diffraction and reflectance high energy electron diffraction methods. The near optimal formation conditions of iron silicide islands with high density and minimal sizes have been determined by using of atomic force microscopy. Multilayer (8-10) monolithic structures with buried iron silicide nanocrystallites have been grown after the definition of monocrystalline burying conditions of iron silicides nanocrystallites in silicon lattice. The structure of buried nanocrystallites has been studied in multilayer monolithic heterostructures by high resolution transmission electron microscopy. It was established that in multilayer samples the majority of nanocrystallites have beta-FeSi2 structure, but some of them have gamma-FeSi2 structure. It was observed an influence of additional annealing at 850 degrees C on the morphology and structure of nanocrystallites. By means of deep level transient spectroscopy data one and two trap levels have been observed in multilayer structures (without and with additional annealing, respectively). Photoluminescence spectra have been studied at 4.2 K and the causes of its absence from buried beta-FeSi, NC have been analyzed.
Collapse
Affiliation(s)
- N G Galkin
- Institute forAutomation and Control Processes, Vladivostok 690032, Russia
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|