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Echicetin Coated Polystyrene Beads: A Novel Tool to Investigate GPIb-Specific Platelet Activation and Aggregation [Text] / A. . Navdaev [et al.] // PLoS One. - 2014. - Vol. 9, Is. 4. - Ст. e93569, DOI 10.1371/journal.pone.0093569. - Cited References: 36. - This study was supported by DFG (SFB688, TP A2, and grant GA 1561/1-1), BMBF (01EO1003) and Rudolf-Marx-stipendium 2014 funded by Gesellschaft fur Thrombose- und Hamostaseforschung (GTH). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. . - ISSN 1932-6203

РУБ Multidisciplinary Sciences
Рубрики:
VON-WILLEBRAND-FACTOR
   GLYCOPROTEIN IB-ALPHA
   DEPENDENT PROTEIN-KINASE
   SIGNALING PATHWAY
   THROMBUS FORMATION
   INTEGRIN ALPHA(IIB)BETA(3)
   VONWILLEBRAND-FACTOR
   HIGH-SHEAR
   IGM-KAPPA
   RISTOCETIN
Аннотация: von Willebrand factor/ristocetin (vWF/R) induces GPIb-dependent platelet agglutination and activation of alpha IIb beta 3 integrin, which also binds vWF. These conditions make it difficult to investigate GPIb-specific signaling pathways in washed platelets. Here, we investigated the specific mechanisms of GPIb signaling using echicetin-coated polystyrene beads, which specifically activate GPIb. We compared platelet activation induced by echicetin beads to vWF/R. Human platelets were stimulated with polystyrene beads coated with increasing amounts of echicetin and platelet activation by echicetin beads was then investigated to reveal GPIb specific signaling. Echicetin beads induced alpha IIb beta 3-dependent aggregation of washed platelets, while under the same conditions vWF/R treatment led only to alpha IIb beta 3-independent platelet agglutination. The average distance between the echicetin molecules on the polystyrene beads must be less than 7 nm for full platelet activation, while the total amount of echicetin used for activation is not critical. Echicetin beads induced strong phosphorylation of several proteins including p38, ERK and PKB. Synergistic signaling via P2Y(12) and thromboxane receptor through secreted ADP and TxA(2), respectively, were important for echicetin bead triggered platelet activation. Activation of PKG by the NO/sGC/cGMP pathway inhibited echicetin bead-induced platelet aggregation. Echicetin-coated beads are powerful and reliable tools to study signaling in human platelets activated solely via GPIb and GPIb-triggered pathways.

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Держатели документа:
[Navdaev, Alexey
Subramanian, Hariharan
Gambaryan, Stepan] Univ Wurzburg, Inst Clin Biochem & Pathobiochem, Wurzburg, Germany
[Petunin, Alexey] Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia
[Clemetson, Kenneth J.] Univ Bern, Theodor Kocher Inst, Bern, Switzerland
[Gambaryan, Stepan] Russian Acad Sci, Sechenov Inst Evolutionary Physiol & Biochem, St Petersburg 196140, Russia
[Walter, Ulrich] Univ Med Ctr Mainz, CTH, Mainz, Germany
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Navdaev, A...; Subramanian, H...; Petunin, A...; Clemetson, K.J.; Gambaryan, S...; Walter, U...; DFG [SFB688, TP A2, GA 1561/1-1]; BMBF [01EO1003]; Rudolf-Marx-stipendium; Gesellschaft fur Thrombose- und Hamostaseforschung (GTH)

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Salinity modulates thermotolerance, energy metabolism and stress response in amphipods Gammarus lacustris / K. P. Vereshchagina [et al.] // PeerJ. - 2016. - Vol. 2016, Is. 11, DOI 10.7717/peerj.2657 . - ISSN 2167-8359
Кл.слова (ненормированные):
Adaptation -- Amphipoda -- Gammarus lacustris -- Salinity -- Thermal tolerance
Аннотация: Temperature and salinity are important abiotic factors for aquatic invertebrates. We investigated the influence of different salinity regimes on thermotolerance, energy metabolism and cellular stress defense mechanisms in amphipods Gammarus lacustris Sars from two populations. We exposed amphipods to different thermal scenarios and determined their survival as well as activity of major antioxidant enzymes (peroxidase, catalase, glutathione S-transferase) and parameters of energy metabolism (content of glucose, glycogen, ATP, ADP, AMP and lactate). Amphipods from a freshwater population were more sensitive to the thermal challenge, showing higher mortality during acute and gradual temperature change compared to their counterparts from a saline lake. A more thermotolerant population from a saline lake had high activity of antioxidant enzymes. The energy limitations of the freshwater population (indicated by low baseline glucose levels, downward shift of the critical temperature of aerobic metabolism and inability to maintain steady-state ATP levels during warming) was ob- served, possibly reflecting a trade-off between the energy demands for osmoregulation under the hypo-osmotic condition of a freshwater environment and protection against temperature stress. © 2016 Vereshchagina et al.

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Держатели документа:
Institute of Biology, Irkutsk State University, Irkutsk, Russian Federation
Baikal Research Centre, Irkutsk, Russian Federation
Institute of Biophysics SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute for Biological Sciences, University of Rostock, Rostock, Germany

Доп.точки доступа:
Vereshchagina, K. P.; Lubyaga, Y. A.; Shatilina, Z.; Bedulina, D.; Gurkov, A.; Axenov-Gribanov, D. V.; Baduev, B.; Kondrateva, E. S.; Gubanov, M.; Zadereev, E.; Sokolova, I.; Timofeyev, M.

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Nutritional biomarkers: Current view and future perspectives / S. Pande [et al.] // Crit. Rev. Food Sci. Nutr. - 2018. - Vol. 58, Is. 18. - P3055-3069, DOI 10.1080/10408398.2017.1350136. - Cited References:163. - The research was partially supported by the Russian Foundation for Basic Research [Grant No 16-06-00-439], the Russian Ministry of Education, Post-Doctoral Program of Project "5-100" [Grant No. M 2.2.3] and the Russian Foundation for Basic Research in collaboration with Krasnoyarsk Regional Fund for Scientific and Technical Activity Support [project No 16-44-242126]. . - ISSN 1040-8398. - ISSN 1549-7852

РУБ Food Science & Technology + Nutrition & Dietetics
Рубрики:
PROMOTES CELL-SURVIVAL
FATTY-ACID OXIDATION
CALORIE RESTRICTION
Кл.слова (ненормированные):
Sirtuins -- NAD -- biomarker -- proteomics -- calorie restriction -- longitivity
Аннотация: There is a poor relationship between nutrient intake and existing nutritional biomarkers due to variety of factors affecting their sensitivity and specificity. To explore the impact of nutrients at molecular level and devising a sensitive biomarker, proteomics is a central technology with sirtuins as one of the most promising nutritional biomarker. Sirtuins (seven mammalian sirtuins reported so far) have been reported to perform protein deacetylases and ADP-ribosyltransferases activity. It is distributed in different cellular compartments thereby controlling several metabolic processes. Sirtuins are oxidized nicotinamide adenine dinucleotide dependent, which implicates a direct effect of the metabolic state of the cell on its activity. Calorie restriction upregulates the mammalian sirtuin protein levels in variety of tissues and organs where it acts upon both histone and nonhistone substrates. Sirtuin senses nutrient availability and impacts gluconeogenesis, glycolysis, and insulin sensitivity. It deacetylates and inhibits the nuclear receptor that activates fat synthesis and adipogenesis in the body, leading to fat loss and bringing favorable cellular and health changes. Sirtuins mediates intracellular response that promotes cell survival, DNA damage repair thereby increasing the cell longitivity. The activation of sirtuins brings a wide spectrum of other health benefits and its activity levels are indicative of nutritional status as well as disease progression in cancer, inflammation, obesity, cardiovascular diseases, and viral infections. There are several foods that activate sirtuin activity and offer significant health benefits by their consumption.

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Держатели документа:
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Dept Biophys, Lab Bioluminescent Biotechnol, Krasnoyarsk, Russia.
Krasnoyarsk State Med Univ, Krasnoyarsk, Russia.
RAS, Siberian Branch, Inst Biophys, Fed State Budgetary Sci Inst, Krasnoyarsk, Russia.
Fed State Budgetary Sci Inst, Sci Res Inst Med Problems North, Krasnoyarsk, Russia.

Доп.точки доступа:
Pande, Shubhra; Kratasyuk, Valentina A.; Medvedeva, Nadezhda N.; Kolenchukova, Oxana A.; Salmina, Alla B.; Kratazyuk, Valentina; KAYITESI, EUGENIE; Russian Foundation for Basic Research [16-06-00-439]; Russian Ministry of Education [M 2.2.3]; Russian Foundation for Basic Research; Krasnoyarsk Regional Fund for Scientific and Technical Activity Support [16-44-242126]

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