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Microparticles prepared from biodegradable polyhydroxyalkanoates as matrix for encapsulation of cytostatic drug / A. V. Murueva [et al.] // Journal of Materials Science: Materials in Medicine. - 2013. - Vol. 24, Is. 8. - P1905-1915, DOI 10.1007/s10856-013-4941-2 . - ISSN 0957-4530
Кл.слова (ненормированные):
3-hydroxybutyric acid -- Average diameter -- Cell attachments -- Chemical compositions -- Mass concentration -- Mouse-fibroblasts -- Polyhydroxyalkanoates -- Solvent evaporation techniques -- Biocompatibility -- Cell culture -- Cells -- Loading -- 3 hydroxybutyric acid -- 3 hydroxyhexanoic acid -- 4 hydroxybutyric acid -- 4',6 diamidino 2 phenylindole -- DNA -- doxorubicin -- nanoparticle -- polyhydroxyalkanoic acid -- polymer -- polystyrene -- solvent -- unclassified drug -- animal cell -- article -- biocompatibility -- biodegradability -- cell adhesion -- cell proliferation -- cell strain 3T3 -- cell viability -- chemical composition -- chemical structure -- controlled study -- cytotoxicity -- drug efficacy -- drug release -- electrophoretic mobility -- encapsulation -- evaporation -- fibroblast -- in vitro study -- nonhuman -- particle size -- priority journal -- stain -- study -- surface charge -- zeta potential
Аннотация: Microparticles made from degradable polyhydroxyalkanoates of different chemical compositions a homopolymer of 3-hydroxybutyric acid, copolymers of 3-hydroxybutyric and 4-hydroxybutyric acids (P3HB/4HB), 3-hydroxybutyric and 3-hydroxyvaleric acids (P3HB/3HV), 3-hydroxybutyric and 3-hydroxyhexanoic acids (P3HB/3HHx) were prepared using the solvent evaporation technique, from double emulsions. The study addresses the influence of the chemical compositions on the size and ?-potential of microparticles. P3HB microparticles loaded with doxorubicin have been prepared and investigated. Their average diameter and ?-potential have been found to be dependent upon the level of loading (1, 5, and 10 % of the polymer mass). Investigation of the in vitro drug release behavior showed that the total drug released from the microparticle into the medium increased with mass concentration of the drug. In this study mouse fibroblast NIH 3T3 cells were cultivated on PHA microparticles, and results of using fluorescent DAPI DNA stain, and MTT assay showed that microparticles prepared from PHAs of different chemical compositions did not exhibit cytotoxicity to cells cultured on them and proved to be highly biocompatible. Cell attachment and proliferation on PHA microparticles were similar to those on polystyrene. The cytostatic drug encapsulated in P3HB/3HV microparticles has been proven to be effective against HeLa tumor cells. В© 2013 Springer Science+Business Media New York.

Scopus
Держатели документа:
Institute of Biophysics, SB RAS, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Institute of Modern Biology and Biotechnology, Siberian Federal University, Svobodny Av. 79, Krasnoyarsk 660041, Russian Federation
Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
Engineering Systems Division, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
Health Sciences Technology Division, Massachusetts Institute of Technology, Cambridge, MA 02139, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Murueva, A.V.; Shishatskaya, E.I.; Kuzmina, A.M.; Volova, T.G.; Sinskey, A.J.

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Biocompatibility of polyhydroxybutyrate microspheres: In vitro and in vivo evaluation / E. I. Shishatskaya [et al.] // Journal of Materials Science: Materials in Medicine. - 2008. - Vol. 19, Is. 6. - P2493-2502, DOI 10.1007/s10856-007-3345-6 . - ISSN 0957-4530
Кл.слова (ненормированные):
Biocompatibility -- Drug delivery -- Fibroblasts -- Ion implantation -- Microspheres -- Polymer matrix -- Fibroblast cells -- Hydroxybutyric acid -- Intramuscular implantation -- Polyhydroxybutyrate -- Organic polymers -- microsphere -- poly(3 hydroxybutyric acid) -- polymer -- animal cell -- animal experiment -- animal tissue -- article -- biocompatibility -- cell infiltration -- controlled study -- giant cell -- implantation -- in vitro study -- in vivo study -- inflammation -- macrophage -- mouse -- nonhuman -- priority journal -- rat -- 3-Hydroxybutyric Acid -- Animals -- Biocompatible Materials -- Cell Survival -- Inflammation -- Materials Testing -- Mice -- Microspheres -- Necrosis -- NIH 3T3 Cells -- Polymers -- Rats -- Rats, Wistar -- Tetrazolium Salts -- Thiazoles -- Time Factors -- Rattus norvegicus
Аннотация: Microspheres have been prepared from the resorbable linear polyester of ?-hydroxybutyric acid (polyhydroxybutyrate, PHB) by the solvent evaporation technique and investigated in vitro and in vivo. Biocompatibility of the microspheres has been proved in tests in the culture of mouse fibroblast cell line NIH 3T3 and in experiments on intramuscular implantation of the microspheres to Wistar rats for 3 months. Tissue response to the implantation of polymeric microspheres has been found to consist in a mild inflammatory reaction, pronounced macrophage infiltration that increases over time, involving mono- and poly-nuclear foreign body giant cells that resorb the polymeric matrix. No fibrous capsules were formed around polymeric microparticles; neither necrosis nor any other adverse morphological changes and tissue transformation in response to the implantation of the PHB microparticles were recorded. The results of the study suggest that polyhydroxybutyrate is a good candidate for fabricating prolonged-action drugs in the form of microparticles intended for intramuscular injection. В© 2008 Springer Science+Business Media, LLC.

Scopus
Держатели документа:
Laboratory of Chemoautotrophic Biosynthesis, Institute of Biophysics SB RAS (Siberian Branch Russian Academy of Sciences), Akademgorodok, 50, Krasnoyarsk 660036, Russian Federation
Laboratory of Bacterial Bioluminescence, Institute of Biophysics SB RAS (Siberian Branch Russian Academy of Sciences), Akademgorodok, 50, Krasnoyarsk 660036, Russian Federation
Institute of Fundamental Biology and Biotechnology, Siberian Federal University, Svo Bodnyi Av. 79, Krasnoyarsk 660041, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Voinova, O.N.; Goreva, A.V.; Mogilnaya, O.A.; Volova, T.G.

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Biomedical investigations of biodegradable PHAs / E. I. Shishatskaya // Macromolecular Symposia. - 2008. - Vol. 269, Is. 1. - P65-81, DOI 10.1002/masy.200850909 . - ISSN 1022-1360
Кл.слова (ненормированные):
Biodegradable polymers -- Biomedical investigations -- PHA -- ABS resins -- Biodegradable polymers -- Biopolymers -- Biotechnology -- Bone -- Cell culture -- Endothelial cells -- Fibers -- Functional polymers -- Osteoblasts -- Polymers -- Surgery -- Abdominal surgeries -- Biocompatible -- Biodegradable -- Biomedical -- Biomedical investigations -- Bone defects -- Ectopic bones -- Hepatocytes -- In vitro -- Microparticles -- Oral surgeries -- Osteogenesis -- PHA -- Polyhydroxybutyrate -- Polymer devices -- Ralstonia -- Russian academy of sciences -- Two types -- Polymer films
Аннотация: This work is a review of the results of biomedical studies of polymer devices (films, fibers, microparticles, 30 implants) made from resorbable PHAs synthesized by the bacterium Wautersia (Ralstonia) eutropha 65786, using the technology developed at the Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences. Two types of PHAs - polyhydroxybutyrate (PHB) and a hydroxybutyrate/hydroxyvalerate copolymer (PHB/PHV) - have been proven to be biocompatible in vitro in cultures of fibroblasts, endothelial cells, hepatocytes, and osteoblasts, and in short- and long-duration experiments on animals. Polymer films and membranes have been found to be usable as scaffolds for functioning cells and monofilament suture fibers - for stitching muscular-fascial wounds and in abdominal surgery. Ectopic bone formation assay and experiments with the model of segmental osteotomy showed that 30 PHB and PHB/HA implants can be used for reparative osteogenesis. The paper reports beneficial results of using polymers to repair bone defects in oral surgery. Copyright В© 2008 WILEY-VCH Verlag GmbH & Co. KGaA.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 50, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodnui Av., 69, Krasnoyarsk, 660148, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.

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A comparative investigation of biodegradable polyhydroxyalkanoate films as matrices for in vitro cell cultures [Text] / E. I. Shishatskaya, T. G. Volova // J. Mater. Sci.-Mater. Med. - 2004. - Vol. 15, Is. 8. - P915-923, DOI 10.1023/B:JMSM.0000036280.98763.c1. - Cited References: 34 . - 9. - ISSN 0957-4530

РУБ Engineering, Biomedical + Materials Science, Biomaterials
Рубрики:
DEGRADATION
   POLY(3-HYDROXYBUTYRATE)
   POLYESTERS
   POLYMERS
Аннотация: The paper describes the production and investigation of flexible films made of high-purity polyhydroxyalkanoates (PHAs) - polyhydroxybutyrate [poly-(3HB)] and poly-3-hydroxybutyrate-co-poly-3-hydroxyvalerate [poly(3Hl3-co-3HV)], containing 4-30 mol % hydroxyvalerate. Poly(3HB-co-3HV) films have a more porous structure than poly-(3HB) films, which are more compact, but their surface properties, such as wettability and surface and interface energies, are the same. Sterilisation of the PHA films by conventional methods (heat treatment and gamma-irradiation) did not impair their strength. Cells cultured on PHA films exhibited high levels of cell adhesion. Cell morphology, protein synthesis and DNA synthesis were estimated by extent of H-3-thymidine incorporation into the animal cell cultures of various origins (fibroblasts, endothelium cells, and isolated hepatocytes) in direct contact with PHAs. The investigation showed that this material can be used to make matrices for in vitro proliferous cells. The investigated properties of poly-(3HB) and poly(3HB-co-3HV) films proved to be fundamentally similar. (C) 2004 Kluwer Academic Publishers.

Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 60036, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Volova, T.G.

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DNA synthesis in heterokaryons obtained by fusion of hepatocytes from a regenerating mouse liver and NIH 3T3 fibroblasts / A. V. Eremeev, N. A. Setkov // Doklady Biological Sciences. - 2000. - Vol. 372, Is. 1-6. - P. 329-332 . - ISSN 0012-4966
Кл.слова (ненормированные):
DNA -- thymidine -- animal -- article -- biosynthesis -- cell division -- cell fusion -- cell strain 3T3 -- cytology -- hybrid cell -- kinetics -- liver cell -- liver regeneration -- metabolism -- mouse -- 3T3 Cells -- Animals -- Cell Division -- Cell Fusion -- DNA -- Hepatocytes -- Hybrid Cells -- Kinetics -- Liver Regeneration -- Mice -- Thymidine

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russia. : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Eremeev, A.V.; Setkov, N.A.

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RESTING CELLS PREINCUBATED WITH ACTINOMYCIN-D DO NOT INHIBIT DNA-SYNTHESIS IN HETEROCARYONS WITH STIMULATED CELLS [Текст] / N. A. SETKOV, T. V. ANDREYEVA, V. N. KAZAKOV // DOKLADY AKADEMII NAUK SSSR. - 1991. - Vol. 318, Is. 4. - P. 986-987. - Cited References: 5 . - ISSN 0002-3264

РУБ Multidisciplinary Sciences
Рубрики:
NIH 3T3 CELLS
   NUCLEI
   HETERODIKARYONS
   FIBROBLASTS
   FUSION

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SETKOV, N.A.; ANDREYEVA, T.V.; KAZAKOV, V.N.

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THE ENTRY INTO S-PERIOD OF NUCLEI IN HETERODIKARYONS MODIFIED BY THE CYCLOHEXIMIDE [Текст] / N. A. SETKOV, V. N. KAZAKOV, T. V. ANDREEVA // TSITOLOGIYA. - 1991. - Vol. 33, Is. 12. - P. 73-78. - Cited References: 16 . - ISSN 0041-3771

РУБ Cell Biology
Рубрики:
NIH 3T3 CELLS
   DNA-SYNTHESIS
   RESTING CELLS
   C-MYC
   FUSION
   FIBROBLASTS
   EXPRESSION
   GENES
Аннотация: Serum-deprived (0.2%) resting NIH 3T3 mouse fibroblasts were fused with serum-stimulated (10%) proliferating cells to elucidate mechanisms of entering into S-period operating in the nuclei of the heterokaryons under the effect of cycloheximide - an inhibitor of protein synthesis. Using radioautography DNA synthesis was investigated in mono-, homo- and heterodikaryons. After short (0.5-3.0 h) depressing of protein synthesis, the nuclei of stimulated cells in heterokaryons were found to enter into S-period. Under these conditions no induction of DNA synthesis was found in the nuclei of resting cells in heterodikaryons. In other experiments, resting cells were under the effect of cycloheximide during 2-4 h before the fusion, that led to a great induction of DNA synthesis in the nuclei of these cells in heterodikaryons. The data obtained are consistent with the idea of fibroblast transition to the rest under the action of labile proteins-repressors.

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SETKOV, N.A.; KAZAKOV, V.N.; ANDREEVA, T.V.

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HEPATOCYTES IN HETEROKARYONS DO NOT RETARD THE ENTRY OF STIMULATED FIBROBLAST NUCLEI INTO THE S-PERIOD [Текст] / N. A. SETKOV, V. N. KAZAKOV, T. V. ANDREYEVA // TSITOLOGIYA. - 1991. - Vol. 33, Is. 6. - P. 76-85. - Cited References: 39 . - ISSN 0041-3771

РУБ Cell Biology
Рубрики:
HUMAN-DIPLOID FIBROBLASTS
   LIVER PLASMA-MEMBRANES
   DNA-SYNTHESIS
   PRIMARY CULTURE
   MOUSE HEPATOCYTES
   CELLS INVITRO
   SENESCENT
   GROWTH
   INHIBIT
   PHASE
Аннотация: Serum-deprived (0.2 %) resting and serum-stimulated (10 %) proliferating NIH 3T3 mouse fibroblasts were fused with hepatocytes from intact, regenerating and embryonic mouse livers to elucidate mechanisms of liver cell proliferation, DNA synthesis being investigated in nuclei of heterokaryons and non-fused cells using radioautography. Hepatocytes in heterokaryons were found to have no inhibitory effect on the entry of stimulated fibroblast nuclei into the S-period, but on the contrary they were involved in DNA synthesis. In addition, the nuclei in heterokaryons mutually stimulated each other to enter the S-period. In their turn, the resting fibroblasts did not prevent the proliferating hepatocytes from the regenerating and embryonic livers to enter the S-period. Possible reasons of the absence of inhibitory effect of differentiated cells in heterokaryons are discussed. The data obtained enable us to conclude that the mechanism of proliferative process control in resting immortalized cells differs from that in differentiated cells where proliferation seems to be stopped without affecting the endogenous inhibitor postulated for the resting and ageing fibroblasts.

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SETKOV, N.A.; KAZAKOV, V.N.; ANDREYEVA, T.V.

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PROTEIN-SYNTHESIS INHIBITORS, LIKE GROWTH-FACTORS, MAY RENDER RESTING 3T3 CELLS COMPETENT FOR DNA-SYNTHESIS - A AUTORADIOGRAPHIC AND CELL-FUSION STUDY [Text] / N. A. SETKOV [et al.] // Cell Prolif. - 1992. - Vol. 25, Is. 3. - P. 181-191, DOI 10.1111/j.1365-2184.1992.tb01393.x. - Cited References: 20 . - ISSN 0960-7722

РУБ Cell Biology
Рубрики:
C-MYC
   CYCLOHEXIMIDE
   FIBROBLASTS
   EXPRESSION
   INDUCTION
   GENES
   FOS
Аннотация: Serum-deprived (0.1-0.2%) resting NIH 3T3 mouse fibroblasts pre-incubated with cycloheximide (7.5-mu-g/ml), or puromycin (10-mu-g/ml), were fused with stimulated cells taken 10 h after changing the medium to one containing 10% serum, and DNA synthesis was investigated in the nuclei of monokaryons, homodikaryons and heterodikaryons using radioautography with the double-labelling technique. Pre-incubation of resting cells with inhibitors of protein synthesis for 1-4 h abolished their ability to suppress DNA synthesis in stimulated nuclei in heterokaryons. Three hours after the removal of cycloheximide from the medium, the resting cells acquired once again the inhibitory capacity for entry of stimulated nuclei into the S period. This inhibitory influence disappeared also in the case of post-fusion cycloheximide application as well as following an 8-12 h pre-treatment of resting cells with actinomycin D (1-mu-g/ml) prior to fusion. Pre-incubation of resting cells for 12 h with PDGF (1 u/ml-1) followed by an 8-48 h incubation in serum-free medium stimulated the onset of DNA synthesis. A brief exposure (45 min) of resting cells to cycloheximide (7.5-mu-g/ml), or puromycin (7.5-mu-g/ml), exerted a similar effect, inducing by itself the entry of cells into the S period. The results support the assumption that acquirement, by resting cells, of competence for DNA replication includes as a necessary step the down-regulation of intracellular growth inhibitors whose formation depends on protein synthesis.

WOS
Держатели документа:
ACAD SCI USSR,INST BIOPHYS,KRASNOYARSK,USSR
WA ENGELHARDT MOLEC BIOL INST,MOSCOW,USSR
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SETKOV, N.A.; KAZAKOV, V.N.; ROSENWALD, I.B.; MAKAROVA, G.F.; EPIFANOVA, O.I.

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10.

ACTIVATED INVIVO HEPATOCYTES STIMULATE DNA-SYNTHESIS IN THE NUCLEI OF RESTING FIBROBLASTS IN HETEROKARYONS [Текст] / N. A. SETKOV, V. N. KAZAKOV // DOKLADY AKADEMII NAUK SSSR. - 1992. - Vol. 323, Is. 1. - P. 162-164. - Cited References: 5 . - ISSN 0002-3264

РУБ Multidisciplinary Sciences

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50
Доп.точки доступа:
SETKOV, N.A.; KAZAKOV, V.N.

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11.

APROTININ ACTION ON DNA-SYNTHESIS IN THE NUCLEI OF HETEROKARYONS FORMED BY FUSION RESTING AND STIMULATED NIH 3T3 CELLS [Текст] / N. A. SETKOV, V. N. KAZAKOV // Dokl. Akad. Nauk. - 1993. - Vol. 333, Is. 3. - P. 398-401. - Cited References: 12 . - ISSN 0869-5652

РУБ Multidisciplinary Sciences
Рубрики:
FIBROBLASTS
GROWTH
AUTOPHAGY

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SETKOV, N.A.; KAZAKOV, V.N.

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12.

APROTININ SUPPRESSED ACTION CYCLOHEXIMIDE ON THE DNA-SYNTHESIS IN NUCLEI OF HETEROKARYONS FORMED BY FUSION RESTING AND STIMULATED NIH 3T3 CELLS [Текст] / N. A. SETKOV // Dokl. Akad. Nauk. - 1994. - Vol. 339, Is. 2. - P. 269-271. - Cited References: 13 . - ISSN 0869-5652

РУБ Multidisciplinary Sciences
Рубрики:
HETERODIKARYONS
   FIBROBLASTS
   INHIBITORS
   AUTOPHAGY

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SETKOV, N.A.

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13.

OKADAIC ACID IS AN INHIBITOR OF TYPE-1 AND TYPE 2A PROTEIN PHOSPHATASES STIMULATED DNA-SYNTHESIS IN RESTING CELLS NIH 3T3 [Текст] / N. A. SETKOV // Dokl. Akad. Nauk. - 1995. - Vol. 340, Is. 1. - P. 114-118. - Cited References: 15 . - ISSN 0869-5652

РУБ Multidisciplinary Sciences
Рубрики:
PHOSPHORYLATION
   NUCLEI
   FUSION
   HETERODIKARYONS
   PROLIFERATION
   FIBROBLASTS
   CYCLIN

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SETKOV, N.A.

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14.

Protein synthesis inhibitors stimulated DNA synthesis in resting cells NIT 3T3 [Текст] / N. A. Setkov // Dokl. Akad. Nauk. - 1996. - Vol. 347, Is. 4. - P. 552-555. - Cited References: 15 . - ISSN 0869-5652

РУБ Multidisciplinary Sciences
Рубрики:
GROWTH
   FIBROBLASTS
   NUCLEI
   IDENTIFICATION
   CYCLOHEXIMIDE
   FUSION
   PERIOD
   STATE

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Setkov, N.A.

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15.

Negative control of cell proliferation depend on protein synthesis in resting cells [Текст] / N. A. Setkov // Dokl. Akad. Nauk. - 1996. - Vol. 346, Is. 5. - P. 708-711. - Cited References: 15 . - ISSN 0869-5652

РУБ Multidisciplinary Sciences
Рубрики:
C-FOS
   SYNTHESIS INHIBITORS
   3T3 CELLS
   TRANSCRIPTIONAL ACTIVATION
   DNA-SYNTHESIS
   FIBROBLASTS
   NUCLEI
   FUSION
   MYC
   JUN

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Setkov, N.A.

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16.

Liposomal cysteine proteinases inhibitors can commitment resting NIH 3T3 cells to proliferate [Текст] / N. A. Setkov // Dokl. Akad. Nauk. - 1997. - Vol. 354, Is. 3. - P. 405-408. - Cited References: 14 . - ISSN 0869-5652

РУБ Multidisciplinary Sciences
Рубрики:
FIBROBLASTS
   GROWTH
   DEGRADATION
   TURNOVER

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Setkov, N.A.

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17.

Brief exposures of resting fibroblasts to okadaic acid stimulate DNA synthesis [Text] / N. A. Setkov, O. I. Epifanova // Cell Prolif. - 1997. - Vol. 30, Is. 1. - P. 7-19, DOI 10.1111/j.1365-2184.1997.tb00912.x. - Cited References: 32 . - ISSN 0960-7722

РУБ Cell Biology
Рубрики:
PDGF-INDUCED PROLIFERATION
   HAMSTER-EMBRYO CELLS
   PROTEIN-PHOSPHORYLATION
   PHOSPHATASE INHIBITORS
   MOUSE FIBROBLASTS
   3T3 CELLS
   FUSION
   TRANSFORMATION
   INDUCTION
   ARREST
Аннотация: To study further the factors providing for cellular quiescence, we used okadaic acid (OA) at concentrations (0.1, 1, 10 or 100 nM) inhibiting type 1 and/or type 2A protein phosphatases in mammalian cell cultures. Brief (2 h) exposure of resting (0.2% serum for 72 h) NIH 3T3 mouse fibroblasts to OA with subsequent incubation of cells in a medium with 0.2% serum, stimulated DNA synthesis at all concentrations studied. Maximal stimulation was observed following pre-incubation of resting cells with 10 nM OA. Treatment of cycling cells (10% serum) with OA (2 h pulses at 12 h intervals for 72 h) prevented their exit to the resting state on transfer to a medium with 0.2% serum. Brief exposures of resting cells to OA did not affect the rate of protein synthesis. OA pulses in the late pre-replicative period had no effect on the entry of serum-stimulated cells into the S phase. Cell fusion experiments with resting (serum-deprived) and proliferating (serum-stimulated) NIH 3T3 cells, using radioautography with a double-labelling technique, revealed that pre-incubation of resting cells with OA for 2 h before and after fusion abrogates their ability to suppress the onset of DNA synthesis in the nuclei of proliferating cells in heterodikaryons. The results indicate that protein phosphatases of type 1 and/or 2A may be involved in the growth-arrest machinery that provides for cellular quiescence.

WOS
Держатели документа:
VA ENGELHARDT MOL BIOL INST,MOSCOW 117984,RUSSIA
RUSSIAN ACAD SCI,INST BIOPHYS,SIBERIAN BRANCH,KRASNOYARSK,RUSSIA
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Setkov, N.A.; Epifanova, O.I.

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18.

Inhibitors of protein biosynthesis can stimulate proliferation of mouse hepatocytes in vitro [Text] / N. A. Setkov, A. V. Eremeev // Biol. Bull. - 2003. - Vol. 30, Is. 3. - P. 212-219, DOI 10.1023/A:1023843409416. - Cited References: 43 . - ISSN 1062-3590

РУБ Biology
Рубрики:
TRANSFORMING-GROWTH-FACTOR
   RAT-LIVER REGENERATION
   FACTOR-BETA
   DNA-SYNTHESIS
   PRIMARY CULTURE
   PARTIAL-HEPATECTOMY
   EPITHELIAL-CELLS
   EXPRESSION
   MECHANISMS
   MODULATION
Аннотация: Hepatocyte proliferation in the liver regenerating after partial hepatectomy ceases when the organ is restored, and the mechanism of this phenomenon is still unclear. In the experiments on fusing hepatocytes from the reoenerated mouse liver (15 days after partial hepatectomy) with NIH 3T3 mouse fibroblasts, we revealed no DNA synthesis in the nuclei of stimulated fibroblasts in heterokaryons (in the presence of hepatocyte nuclei), whereas DNA synthesis in nonfused cells was undisturbed. In this work, our purpose was to find out whether the suppression of DNA synthesis in heterokaryons could be due to the appearance in hepatocytes of some endogenous factors having an inhibitory effect on proliferation. To this end, hepatocytes from the mouse liver regenerated after partial hepatectomy were treated with cycloheximide for 1-4 h and were then fused with stimulated fibroblasts. Such a short-term treatment of hepatocytes with cycloheximide proved to result in the loss of their ability to inhibit DNA synthesis in the nuclei of stimulated or quiescent fibroblasts in heterokaryons, but hepatocytes proper actively proliferated in the medium with a low serum content (0.2%). When the mice with the liver reoenerated after partial hepatectomy were treated with a single sublethal dose of cycloheximide (3 mg/kg), their hepatocytes taken two days after this treatment had no inhibitory effect. Puromycin, another inhibitor of protein synthesis, had the same effect on hepatocytes. These results may be interpreted as evidence that the final stage of liver regeneration after damage is controlled by the factors having a C C negative effect on cell proliferation.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Setkov, N.A.; Eremeev, A.V.

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19.

A comparative investigation of biodegradable polyhydroxyalkanoate films as matrices for in vitro cell cultures [Text] / E. I. Shishatskaya, T. G. Volova // J. Mater. Sci.-Mater. Med. - 2004. - Vol. 15, Is. 8. - P. 915-923, DOI 10.1023/B:JMSM.0000036280.98763.c1. - Cited References: 34 . - ISSN 0957-4530

РУБ Engineering, Biomedical + Materials Science, Biomaterials
Рубрики:
DEGRADATION
   POLY(3-HYDROXYBUTYRATE)
   POLYESTERS
   POLYMERS
Аннотация: The paper describes the production and investigation of flexible films made of high-purity polyhydroxyalkanoates (PHAs) - polyhydroxybutyrate [poly-(3HB)] and poly-3-hydroxybutyrate-co-poly-3-hydroxyvalerate [poly(3Hl3-co-3HV)], containing 4-30 mol % hydroxyvalerate. Poly(3HB-co-3HV) films have a more porous structure than poly-(3HB) films, which are more compact, but their surface properties, such as wettability and surface and interface energies, are the same. Sterilisation of the PHA films by conventional methods (heat treatment and gamma-irradiation) did not impair their strength. Cells cultured on PHA films exhibited high levels of cell adhesion. Cell morphology, protein synthesis and DNA synthesis were estimated by extent of H-3-thymidine incorporation into the animal cell cultures of various origins (fibroblasts, endothelium cells, and isolated hepatocytes) in direct contact with PHAs. The investigation showed that this material can be used to make matrices for in vitro proliferous cells. The investigated properties of poly-(3HB) and poly(3HB-co-3HV) films proved to be fundamentally similar. (C) 2004 Kluwer Academic Publishers.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 60036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Volova, T.G.

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20.

Laser processing of polymer constructs from poly(3-hydroxybutyrate) / T. G. Volova [et al.] // J. Biomater. Sci. Polym. Ed. - 2015. - Vol. 26, Is. 16. - P1210-1228, DOI 10.1080/09205063.2015.1082810 . - ISSN 0920-5063
Кл.слова (ненормированные):
biocompatibility -- biopolymers -- laser processing -- poly(3-hydroxybutyrate) -- polymer materials -- Biocompatibility -- Biomechanics -- Biopolymers -- Bone -- Cell culture -- Pulsed lasers -- Scaffolds (biology) -- Stem cells -- 3t3 mouse fibroblasts -- Bone marrow -- Bone regeneration -- Laser process -- Mesenchymal stem cell -- Poly-3-hydroxybutyrate -- Polymer materials -- Pulsed mode -- Laser materials processing
Аннотация: CO2 laser radiation was used to process poly(3-hydroxybutyrate) constructs - films and 3D pressed plates. Laser processing increased the biocompatibility of unperforated films treated with moderate uniform radiation, as estimated by the number and degree of adhesion of NIH 3T3 mouse fibroblast cells. The biocompatibility of perforated films modified in the pulsed mode did not change significantly. At the same time, pulsed laser processing of the 3D plates produced perforated scaffolds with improved mechanical properties and high biocompatibility with bone marrow-derived multipotent, mesenchymal stem cells, which show great promise for bone regeneration. © 2015 Taylor & Francis.

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Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, Russian Federation
School of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, Russian Federation
Special Design and Technological Bureau, Nauka Krasnoyarsk Scientific Centre of Siberian Branch, Russian Academy of Sciences, 53 Mir Avenue, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Volova, T. G.; Tarasevich, A. A.; Golubev, A. I.; Boyandin, A. N.; Shumilova, A. A.; Nikolaeva, E. D.; Shishatskaya, E. I.

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