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 Найдено в других БД:Публикации Чарушина В.Н. (12)
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 1-10    11-20   21-27 
1.
Инвентарный номер: нет.
   


   
    Variation in tumor pH affects pH-triggered delivery of peptide-modified magnetic nanoparticles / A. G. Pershina, O. Y. Brikunova, S. V. Vtorushin [et al.] // Nanomedicine: nanotechnology, biology and medicine. - 2021. - Vol. 32. - P102317
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
PH PROFILE -- ENDOCYTOSIS -- IRON OXIDE MAGNETIC NANOPARTICLES
Аннотация: Acidification of the extracellular matrix, an intrinsic characteristic of many solid tumors, is widely exploited for physiologically triggered delivery of contrast agents, drugs, and nanoparticles to tumor. However, pH of tumor microenvironment shows intra- and inter-tumor variation. Herein, we investigate the impact of this variation on pH-triggered delivery of magnetic nanoparticles (MNPs) modified with pH-(low)-insertion peptide (pHLIP). Fluorescent flow cytometry, laser confocal scanning microscopy and transmission electron microscopy data proved that pHLIP-conjugated MNPs interacted with 4T1 cells in two-dimensional culture and in spheroids more effectively at pH 6.4 than at pH 7.2, and entered the cell via clathrin-independent endocytosis. The accumulation efficiency of pHLIP-conjugated MNPs in 4T1 tumors after their intravenous injection, monitored in vivo by magnetic resonance imaging, showed variation. Analysis of the tumor pH profiles recorded with implementation of original nanoprobe pH sensor, revealed obvious correlation between pH measured in the tumor with the amount of accumulated MNPs.

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2.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of novel carboranyl derivatives of alfa-amino acids [Electronic resource] / D. A. Gruzdev, G. L. Levit, I. V. Bazhov, A. M. Demin, L. Sh. Sadretdinova, V. A. Ol'shevskaya, V. N. Kalinin, V. P. Krasnov, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2010. - Vol. 59, № 1. - P110-115. - Bibliogr. : p. 115 (28 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CARBORANES -- AMINO ACIDS -- AMIDES
Аннотация: New routes to closo-carboranyl derivatives of L-lysine and L-glutamic acid with free gA-NH2 groups were proposed

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2010, 59 (1), 110-115.pdf
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3.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of N-[(3-Amino-1,2-dicarba-closo-dodecaboran-1-yl)acetyl] Derivatives of alfa-Amino Acids [Text] / G. L. Levit, V. P. Krasnov, D. A. Gruzdev, A. M. Demin, I. V. Bazhov, O. N. Chupakhin, V. N. Charushin // Collection of Czechoslovak Chemical Communications. - 2007. - Vol. 72, № 12. - P1697-1706
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The N-[(3-amino-1,2-dicarba-closo-dodecaboran-1-yl)acetyl] derivatives of amino acids were prepared starting from N-protected (Ac, Form, Bz, and Boc) 3-amino-1-(carboxymethyl)-o-carboranes and alkyl esters of natural amino acids using the carbodiimide method of coupling and removing the ester groups. All the amides obtained were diastereoisomeric mixtures. Some diastereoisomers were separated and the assignment of the absolute configuration of aminocarborane fragments was performed by X-ray crystallography

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4.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of Fe@C nanoparticles containing sulfo groups on their surfaces and study of their aggregation behavior in aqueous media / I. A. Bakhteeva, I. V. Medvedeva, I. V. Byzov [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 4. - P722-731
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MAGNETIC NANOPARTICLES -- IRON-CARBON -- BENZENESULFONIC ACID -- IR SPECTROSCOPY
Аннотация: Magnetic iron nanoparticles (MNPs) encapsulated in a carbon shells and containing sulfo groups on the surface (Fe@C-SO3H) were synthesized. The aggregative stability of aqueous suspensions of the Fe@C-SO3H nanoparticles was studied in solutions of bovine serum albumin and calcium chloride and in phosphate-buffered saline, which simulate blood plasma. It is shown that the Fe@C-SO3H particles practically do not aggregate in the phosphate buffer saline for a long time (several days). On the contrary, MNPs encapsulated in a protein shells using ultrasonic treatment form aggregates up to 110–120 nm in size under these conditions. Suspensions of the Fe@C-SO3H particles are stable in aqueous solutions of calcium chloride in the range of the solid phase concentration between 0.05 and 0.10 g L−1. The results obtained indicate the possibility of using the functionalized Fe@C-SO3H nanoparticles in vitro experiments in biological media.

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5.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of derivatives of the RGD peptide with the residues of glutaric and adipic acids [Electronic resource] / A. Yu. Vigorov, I. A. Nizova, V. P. Krasnov, A. M. Demin // Russian Journal of Bioorganic Chemistry. - 2014. - Vol.40, №2. - С. 142-150. - Bibliogr. : p. 149-150 (42 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
AMINO ACIDS -- PEPTIDE SYNTHESIS -- RACEMIZATION
Аннотация: Derivatives of the RGD peptide were prepared by the attachment of the residues of glutaric and adipinic acids to the α-amino group of L-arginine. This modification allowed condensation of these derivatives with other biomolecules or nanoparticles

\\\\expert2\\nbo\\Russian Journal of Bioorganic Chemistry\\2014, v.40, N 2, p.142-150.pdf
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6.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of amides and N-acyl derivatives of 3-amino-1-carboxymetil-1,2-dicarba-closo-dodecarborane [Text] : доклад, тезисы доклада / G. L. Levit, V. P. Krasnov, D. A. Gruzdev, A. M. Demin, I. V. Bazhov, V. A. Ol'shevskaya, V. N. Kalinin, O. N. Chupakhin, V. N. Charushin // Euroboron 4, Bremen, Germany, 2-6 Sept. 2007 : abstr. . - Bremen, Germany, 2007. - 137 (56PO). - Bibliogr. : p. 137 (1 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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7.
Инвентарный номер: нет.
   
   S 90


   
    Study of the effect of the nature of the side chain in esters of amino acids on the diastereoselectivity of condensation with 5(4H)-oxazolone in the synthesis of dipeptides with N-terminal N-acetylphenylalanine [Electronic resource] / V. P. Krasnov, E. A. Zhdanova, N. Z. Solieva, L. Sh. Sadretdinova, I. M. Bukrina, A. M. Demin, G. L. Levit, M. A. Ezhikova, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2004. - Vol. 53, № 6. - P1331-1334
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Conditions for fast racemization of 5(4H)-oxazolones prepared from N-acylphenylalanine were found. Reactions of 4-benzyl-2-methyl-5(4H)-oxazolone with amino acid esters proceed diastereoselectively to give predominantly dipeptides comprising R-phenylalanine. The diastereoselectivity increases with complication of the structure of the side chain in the amino acid esters

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2004, 53 (6), 1331.pdf
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8.
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    Silica coating of Fe3O4 magnetic nanoparticles with pmida assistance to increase the surface area and enhance peptide immobilization efficiency / A. M. Demin, A. I. Maksimovskikh, A. V. Mekhaev [и др.] // Ceramics international. - 2021. - № б/н. - P1-6
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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9.
Инвентарный номер: нет.
   
   S 48


   
    Separation of racemic 1-substituted 3-amino-1,2-dicarba-closo-dodecarboranes by chiral HPLC [Text] : доклад, тезисы доклада / A. M. Demin, A. N. Grishakov, G. L. Levit, V. A. Ol'shevskaya, V. N. Kalinin, V. P. Krasnov // EuroBoron 5, Edinburgh, UK, 29 august - 2 september 2010, Heriot-Watt University : abstr. . - Edinburgh, UK , 2010. - 85 (FP7)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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10.
Инвентарный номер: нет.
   


   
    Peptide ligands on the PEGylated nanoparticle surface and human serum composition are key factors for the interaction between immune cells and nanoparticles / A. G. Pershina, A. M. Demin, N. A. Perekucha [et al.] // Colloids and Surfaces B: Biointerfaces. - 2023. - Vol. 221. - P112981
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The architecture of a nanoparticles' surface formed due to a modification with a ligand and protein corona formation in biofluids is critical for interactions with cells in vivo. Here we studied interactions of immune cells with magnetic nanoparticles (MNPs) covalently modified with polyethylene glycol (PEG) and their counterparts conjugated with peptides: a pH (low) insertion peptide (pHLIP) and cycloRGD as a targeting ligand in human serum. The conjugation of MNPs-PEG with pHLIP, but not with cycloRGD, enhanced the association of these particles with mononuclear phagocytic cells in vitro and in vivo. We did not find a clear difference in protein corona composition between the pHLIP-modified and parental PEGylated nanoparticles. Analysis of the effect of autologous human serum on MNP uptake by monocytes showed that the efficiency of endocytosis varies among healthy donors and depends on intrinsic properties of serum. Nevertheless, using classic blood, coagulation, biochemical tests, and anti-PEG IgG serum level, we failed to identify the cause of the observed interdonor variation. These individual differences should be taken into consideration during testing of nanotherapeutics.

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