排序方式: 共有210条查询结果,搜索用时 15 毫秒
11.
High‐Resolution Molecular Validation of Self‐Renewal and Spontaneous Differentiation in Clinical‐Grade Adipose‐Tissue Derived Human Mesenchymal Stem Cells 下载免费PDF全文
Amel Dudakovic Emily Camilleri Scott M. Riester Eric A. Lewallen Sergiy Kvasha Xiaoyue Chen Darcie J. Radel Jarett M. Anderson Asha A. Nair Jared M. Evans Aaron J. Krych Jay Smith David R. Deyle Janet L. Stein Gary S. Stein Hee‐Jeong Im Simon M. Cool Jennifer J. Westendorf Sanjeev Kakar Allan B. Dietz Andre J. van Wijnen 《Journal of cellular biochemistry》2014,115(10):1816-1828
12.
13.
14.
Shakiru O. Alapafuja Michael S. Malamas Vidyanand Shukla Alexander Zvonok Sally Miller Laura Daily Girija Rajarshi Christina Yume Miyabe Honrao Chandrashekhar JodiAnne Wood Sergiy Tyukhtenko Alex Straiker Alexandros Makriyannis 《Bioorganic & medicinal chemistry》2019,27(1):55-64
Monoacylglycerol lipase (MGL) inhibition provides a potential treatment approach to glaucoma through the regulation of ocular 2-arachidonoylglycerol (2-AG) levels and the activation of CB1 receptors. Herein, we report the discovery of new series of carbamates as highly potent and selective MGL inhibitors. The new inhibitors showed potent nanomolar inhibitory activity against recombinant human and purified rat MGL, were selective (>1000-fold) against serine hydrolases FAAH and ABHD6 and lacked any affinity for the cannabinoid receptors CB1 and CB2. Protein-based 1H NMR experiments indicated that inhibitor 2 rapidly formed a covalent adduct with MGL with a residence time of about 6?h. This interconversion process “intrinsic reversibility” was exploited by modifications of the ligand’s size (length and bulkiness) to generate analogs with “tunable’ adduct residence time (τ). Inhibitor 2 was evaluated in a normotensive murine model for assessing intraocular pressure (IOP), which could lead to glaucoma, a major cause of blindness. Inhibitor 2 was found to decrease ocular pressure by ~4.5?mmHg in a sustained manner for at least 12?h after a single ocular application, underscoring the potential for topically-administered MGL inhibitors as a novel therapeutic target for the treatment of glaucoma. 相似文献
15.
Predicting Calendar Aging in Lithium Metal Secondary Batteries: The Impacts of Solid Electrolyte Interphase Composition and Stability 下载免费PDF全文
Sean M. Wood Chengcheng Fang Eric J. Dufek Shrikant C. Nagpure Sergiy V. Sazhin Boryann Liaw Y. Shirley Meng 《Liver Transplantation》2018,8(26)
Calendar aging of lithium metal batteries, in which cells' components degrade internally due to chemical reactions while no current is being applied, is a relatively unstudied field. In this work, a model to predict calendar aging of lithium metal cells is developed using two sets of readily obtainable data: solid electrolyte interphase (SEI) layer composition (measured via X‐ray photoelectron spectroscopy) and SEI stability (measured as a degradation rate using a simple constant current–constant voltage charging protocol). Electrolyte properties such as volume and salt concentration are varied in order to determine their effect on SEI stability and composition, with subsequent impacts to calendar aging. Lower salt concentrations produce a solvent‐based, more soluble SEI, while the highest concentration produces a salt‐based, less soluble SEI. Higher electrolyte volumes promote dissolution of the SEI and thus decrease its stability. The model predicts that lithium metal would be the limiting factor in calendar aging, depleting long before the electrolyte does. Additionally, the relative composition of the electrolyte during aging is modeled and found to eventually converge to the same value independent of initial salt concentration. 相似文献
16.
17.
18.
Umesh K. Jinwal John C. O'Leary III Sergiy I. Borysov Jeffrey R. Jones Qingyou Li John Koren III Jose F. Abisambra Grant D. Vestal Lisa Y. Lawson Amelia G. Johnson Laura J. Blair Ying Jin Yoshinari Miyata Jason E. Gestwicki Chad A. Dickey 《The Journal of biological chemistry》2010,285(22):16798-16805
The microtubule-associated protein Tau plays a crucial role in regulating the dynamic stability of microtubules during neuronal development and synaptic transmission. In a group of neurodegenerative diseases, such as Alzheimer disease and other tauopathies, conformational changes in Tau are associated with the initial stages of disease pathology. Folding of Tau into the MC1 conformation, where the amino acids at residues 7–9 interact with residues 312–342, is one of the earliest pathological alterations of Tau in Alzheimer disease. The mechanism of this conformational change in Tau and the subsequent effect on function and association to microtubules is largely unknown. Recent work by our group and others suggests that members of the Hsp70 family play a significant role in Tau regulation. Our new findings suggest that heat shock cognate (Hsc) 70 facilitates Tau-mediated microtubule polymerization. The association of Hsc70 with Tau was rapidly enhanced following treatment with microtubule-destabilizing agents. The fate of Tau released from the microtubule was found to be dependent on ATPase activity of Hsc70. Microtubule destabilization also rapidly increased the MC1 folded conformation of Tau. An in vitro assay suggests that Hsc70 facilitates formation of MC1 Tau. However, in a hyperphosphorylating environment, the formation of MC1 was abrogated, but Hsc70 binding to Tau was enhanced. Thus, under normal circumstances, MC1 formation may be a protective conformation facilitated by Hsc70. However, in a diseased environment, Hsc70 may preserve Tau in a more unstructured state, perhaps facilitating its pathogenicity. 相似文献
19.
In vivo functions of mitogen-activated protein kinases: conclusions from knock-in and knock-out mice 总被引:4,自引:0,他引:4
Multicellular organisms achieve intercellular communication by means of signalling molecules whose effect on the target cell
is mediated by signal transduction pathways. Such pathways relay, amplify and integrate signals to elicit appropriate biological
responses. Protein kinases form crucial intermediate components of numerous signalling pathways. One group of protein kinases,
the mitogen-activated protein kinases (MAP kinases) are kinases involved in signalling pathways that respond primarily to
mitogens and stress stimuli. In vitro studies revealed that the MAP kinases are implicated in several cellular processes,
including cell division, differentiation, cell survival/apoptosis, gene expression, motility and metabolism. As such, dysfunction
of specific MAP kinases is associated with diseases such as cancer and immunological disorders. However, the genuine in vivo
functions of many MAP kinases remain elusive. Genetically modified mouse models deficient in a specific MAP kinase or expressing
a constitutive active or a dominant negative variant of a particular MAP kinase offer valuable tools for elucidating the biological
role of these protein kinases. In this review, we focus on the current status of MAP kinase knock-in and knock-out mouse models
and their phenotypes. Moreover, examples of the application of MAP kinase transgenic mice for validating therapeutic properties
of specific MAP kinase inhibitors, and for investigating the role of MAP kinase in pathogen-host interactions will be discussed. 相似文献
20.
Law WC Markowicz P Yong KT Roy I Baev A Patskovsky S Kabashin AV Ho HP Prasad PN 《Biosensors & bioelectronics》2007,23(5):627-632
In this study, a novel phase-sensitive surface plasmon resonance (SPR) setup, based on temporal modulation of a pumping beam by a photoelastic modulator, and subsequent extraction of phase information at the second and the third harmonics of the modulation frequency, has been developed to study biomolecular interactions on SPR-supporting gold. We demonstrated that the design setup provides ultra-high phase sensitivity, together with a wide dynamic range of measurements. In particular, the proposed scheme was used to study real-time interaction of biotin-protein and streptavidin-BSA complexes. We have found that the proposed technique has a detection limit as high as 2.89 x 10(-7) in terms of refractive index units (RIU). In terms of biosensing performance, a detection sensitivity of 1.3 nM from the streptavidin-maleimide/thiolated BSA complex binding reaction has also been demonstrated. 相似文献