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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Markova S.V., Golz S..., Frank L.A., Kalthof B..., Vysotski E.S.
Заглавие : Cloning and expression of cDNA for a luciferase from the marine copepod Metridia longa - A novel secreted bioluminescent reporter enzyme
Колич.характеристики :6 с
Место публикации : J. Biol. Chem.: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC, 2004. - Vol. 279, Is. 5. - С. 3212-3217. - ISSN 0021-9258, DOI 10.1074/jbc.M309639200
Примечания : Cited References: 37
Предметные рубрики: VARGULA-HILGENDORFII LUCIFERASE
GREEN FLUORESCENT PROTEIN
GENE-EXPRESSION
FIREFLY LUCIFERASE
PROMOTER ACTIVITY
MAMMALIAN-CELLS
RECEPTOR
CANCER
PHOTOPROTEINS
LUMINESCENCE
Аннотация: Metridia longa is a marine copepod from which a blue bioluminescence originates as a secretion from epidermal glands in response to various stimuli. We demonstrate that Metridia luciferase is specific for coelenterazine to produce blue light (lambda(max)=480 nm). Using an expression cDNA library and functional screening, we cloned and sequenced the cDNA encoding the Metridia luciferase. The cDNA is an 897-bp fragment with a 656-bp open reading frame, which encodes a 219-amino acid polypeptide with a molecular weight of 23,885. The polypeptide contains an N-terminal signal peptide of 17 amino acid residues for secretion. On expression of the Metridia luciferase gene in mammalian Chinese hamster ovary cells the luciferase is detected in the culture medium confirming the existence of a naturally occurring signal peptide for secretion in the cloned luciferase. The novel secreted luciferase was tested in a practical assay application in which the activity of A2a and NPY2 G-protein-coupled receptors was detected. These results clearly suggest that the secreted Metridia luciferase is well suited as a reporter for monitoring gene expression and, in particular, for the development of novel ultra-high throughput screening technologies.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ranjan, Rajeev, Kirillova, Maria A., Esimbekova, Elena N., Zharkov, Sergey M., Kratasyuk, Valentina A.
Заглавие : Agglomeration behavior of lipid-capped gold nanoparticles
Колич.характеристики :11 с
Коллективы : Russian Foundation for Basic Research [16-34-60100]; [0356-2017-0017]
Место публикации : J. Nanopart. Res.: SPRINGER, 2018. - Vol. 20, Is. 4. - Ст.107. - ISSN 1388-0764, DOI 10.1007/s11051-018-4215-5. - ISSN 1572-896X(eISSN)
Примечания : Cited References:35. - The research was supported by the Russian Foundation for Basic Research [project no. 16-34-60100] and the state budget allocated to the fundamental research (project no. 0356-2017-0017). The authors thank Prof. Tatiana Volova, Prof. Evgenia Slyusareva, and Ms. Nina Slyusarenko of the Siberian Federal University for their assistance in the zeta potential and zeta-average analysis.
Предметные рубрики: COLORIMETRIC SENSOR ARRAY
OPTICAL-PROPERTIES
AGGREGATION
CANCER
Ключевые слова (''Своб.индексиров.''): gold nanoparticles--ionic interference--agglomeration--stabilization--lipid capping--nanobiotechnology applications
Аннотация: The current investigation deciphers aggregation pattern of gold nanoparticles (AuNPs) and lipid-treated AuNPs when subjected to aqueous sodium chloride solution with increasing ionic strengths (100-400 nM). AuNPs were synthesized using 0.29 mM chloroauric acid and by varying the concentrations of trisodium citrate (AuNP1 1.55 mM, AuNP2 3.1 mM) and silver nitrate (AuNP3 5.3 mu M, AuNP4 10.6 mu M) with characteristic LSPR peaks in the range of 525-533 nm. TEM analysis revealed AuNPs to be predominantly faceted nanocrystals with the average size of AuNP1 to be 35 +/- 5 nm, AuNP2 15 +/- 5 nm, AuNP3 30 +/- 5 nm, and AuNP4 30 +/- 5 nm and the zeta-average for AuNPs were calculated to be 31.23, 63.80, 26.08, and 28 nm respectively. Induced aggregation was observed within 10 s in all synthesized AuNPs while lipid-treated AuNP2 (AuNP2-L) was found to withstand ionic interferences at all concentration levels. However, lipid-treated AuNPs synthesized using silver nitrate and 1.55 mM trisodium citrate (AuNP3, AuNP4) showed much lower stability. The zeta potential values of lipid-treated AuNPs (AuNP1-L-1x/200, -17.93 +/- 1.02 mV; AuNP2-L-1x/200, -21.63 +/- 0.70; AuNP3-L-1x/200, -14.54 +/- 0.90; AuNP3-L-1x/200 -13.77 +/- 0.83) justified these observations. To summarize, AuNP1 and AuNP2 treated with lipid mixture 1 equals or above 1x/200 or 1x/1000 respectively showed strong resistance against ionic interferences (up to 400 mM NaCl). Use of lipid mixture 1 for obtaining highly stable AuNPs also provided functional arms of various lengths which can be used for covalent coupling.
WOS,
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bashmakova, Eugenia E., Krasitskaya, Vasilisa V., Zamay, Galina S., Zamay, Tatiana N., Frank, Ludmila A.
Заглавие : Bioluminescent aptamer-based solid-phase microassay to detect lung tumor cells in plasma
Колич.характеристики :5 с
Коллективы : Russian Academy of Sciences [0356-2017-0017]
Место публикации : Talanta: ELSEVIER SCIENCE BV, 2019. - Vol. 199. - С. 674-678. - ISSN 0039-9140, DOI 10.1016/j.talanta.2019.03.030. - ISSN 1873-3573(eISSN)
Примечания : Cited References:19. - The authors are grateful to the staff of Krasnoyarsk regional clinical oncology center named after A.I. Kryzhanovsky and particularly doctor Alexey V. Krat for the experimental material provided. This work was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences, project No. 0356-2017-0017.
Предметные рубрики: CONJUGATED NANOPARTICLES
CANCER
COLLECTION
LIGANDS
PROBES
Ключевые слова (''Своб.индексиров.''): dna aptamers--lung tumor--bioluminescent solid-phase microassay
Аннотация: Two high-affinity DNA aptamers for lung tumor cells were applied as biospecific elements in bioluminescent assay of patient blood. The oligonucleotide complementary to the 5' end of both aptamers carrying either biotin or Ca2+-regulated photoprotein obelin was used to form a sandwich-type analytical complex on the surfaces of magnetic streptavidin-activated microspherical particles. Clinical blood samples from cases of morphologically confirmed lung cancer and control samples were analyzed applying the developed assay. From the receiver operator curve (ROC) analysis, the chosen threshold value as clinical decision limit offers the sensitivity of 91.5% and the specificity of 75% (p 0.001). The area under ROC curve with the value of 0.901 distinguishes well between the two groups under investigation.
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