排序方式: 共有123条查询结果,搜索用时 31 毫秒
61.
Xenia Latypova Marie Vincent Alice Mollé Oluwadamilare A. Adebambo Cynthia Fourgeux Tahir N. Khan Alfonso Caro Monica Rosello Carmen Orellana Dmitriy Niyazov Damien Lederer Marie Deprez Yline Capri Peter Kannu Anne Claude Tabet Jonathan Levy Emmelien Aten Nicolette den Hollander Bertrand Isidor 《American journal of human genetics》2021,108(5):929-941
62.
Rémi Gau Stephanie Noble Katja Heuer Katherine L. Bottenhorn Isil P. Bilgin Yu-Fang Yang Julia M. Huntenburg Johanna M.M. Bayer Richard A.I. Bethlehem Shawn A. Rhoads Christoph Vogelbacher Valentina Borghesani Elizabeth Levitis Hao-Ting Wang Sofie Van Den Bossche Xenia Kobeleva Jon Haitz Legarreta Samuel Guay Xi-Nian Zuo 《Neuron》2021,109(11):1769-1775
63.
Nicola J. Robertson Christopher Meehan Kathryn A. Martinello Adnan Avdic-Belltheus Tiziana Boggini Tatenda Mutshiya Ingran Lingam Qin Yang Magdalena Sokolska Xenia Charalambous Alan Bainbridge Mariya Hristova Boris W. Kramer Xavier Golay Ben Weil Mark W. Lowdell 《Cytotherapy》2021,23(6):521-535
Background: With therapeutic hypothermia (HT) for neonatal encephalopathy, disability rates are reduced, but not all babies benefit. Pre-clinical rodent studies suggest mesenchymal stromal cells (MSCs) augment HT protection. Aims:The authors studied the efficacy of intravenous (IV) or intranasal (IN) human umbilical cord-derived MSCs (huMSCs) as adjunct therapy to HT in a piglet model. Methods:A total of 17 newborn piglets underwent transient cerebral hypoxia-ischemia (HI) and were then randomized to (i) HT at 33.5°C 1–13 h after HI (n = 7), (ii) HT+IV huMSCs (30 × 106 cells) at 24 h and 48 h after HI (n = 5) or (iii) HT+IN huMSCs (30 × 106 cells) at 24 h and 48 h after HI (n = 5). Phosphorus-31 and hydrogen-1 magnetic resonance spectroscopy (MRS) was performed at 30 h and 72 h and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-positive cells and oligodendrocytes quantified. In two further piglets, 30 × 106 IN PKH-labeled huMSCs were administered. Results:HI severity was similar between groups. Amplitude-integrated electroencephalogram (aEEG) recovery was more rapid for HT+IN huMSCs compared with HT from 25 h to 42 h and 49 h to 54 h (P ≤ 0.05). MRS phosphocreatine/inorganic phosphate was higher on day 2 in HT+IN huMSCs than HT (P = 0.035). Comparing HT+IN huMSCs with HT and HT+IV huMSCs, there were increased OLIG2 counts in hippocampus (P = 0.011 and 0.018, respectively), internal capsule (P = 0.013 and 0.037, respectively) and periventricular white matter (P = 0.15 for IN versus IV huMSCs). Reduced TUNEL-positive cells were seen in internal capsule with HT+IN huMSCs versus HT (P = 0.05). PKH-labeled huMSCs were detected in the brain 12 h after IN administration. Conclusions:After global HI, compared with HT alone, the authors saw beneficial effects of HT+IN huMSCs administered at 24 h and 48 h (30 × 106 cells/kg total dose) based on more rapid aEEG recovery, improved 31P MRS brain energy metabolism and increased oligodendrocyte survival at 72 h. 相似文献
64.
Beebe X Darczak D Henry RF Vortherms T Janis R Namovic M Donnelly-Roberts D Kage KL Surowy C Milicic I Niforatos W Swensen A Marsh KC Wetter JM Franklin P Baker S Zhong C Simler G Gomez E Boyce-Rustay JM Zhu CZ Stewart AO Jarvis MF Scott VE 《Bioorganic & medicinal chemistry》2012,20(13):4128-4139
A novel 4-aminocyclopentapyrrolidine series of N-type Ca(2+) channel blockers have been discovered. Enantioselective synthesis of the 4-aminocyclopentapyrrolidines was enabled using N-tert-butyl sulfinamide chemistry. SAR studies demonstrate selectivity over L-type Ca(2+) channels. N-type Ca(2+) channel blockade was confirmed using electrophysiological recording techniques. Compound 25 is an N-type Ca(2+) channel blocker that produces antinociception in inflammatory and nociceptive pain models without exhibiting cardiovascular or motor liabilities. 相似文献
65.
Haidar JN Yuan QA Zeng L Snavely M Luna X Zhang H Zhu W Ludwig DL Zhu Z 《Proteins》2012,80(3):896-912
Antibody (Ab) humanization is crucial to generate clinically relevant biologics from hybridoma-derived monoclonal antibodies (mAbs). In this study, we integrated antibody structural information from the Protein Data Bank with known back-to-mouse mutational data to build a universal consensus of framework positions (10 heavy and 7 light) critical for the preservation of the functional conformation of the Complimentarity Determining Region of antibodies. On the basis of FR consensus, we describe here a universal combinatorial library suitable for humanizing exogenous antibodies by CDR-grafting. The six CDRs of the murine anti-human EGFR Fab M225 were grafted onto a distinct (low FR sequence similarity to M225) human FR sequence that incorporates at the 17 FR consensus positions the permutations of the naturally observed amino acid diversities. Ten clones were selected from the combinatorial library expressing phage-displayed humanized M225 Fabs. Surprisingly, 2 of the 10 clones were found to bind EGFR with stronger affinity than M225. Cell-based assays demonstrated that the 10 selected clones retained epitope specificity by blocking EGFR phosphorylation and thus hindering cellular proliferation. Our results suggest that there is a universal and structurally rigid near-CDR set of FR positions that cooperatively support the binding conformation of CDRs. 相似文献
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67.
Ilya Ruvinsky Olga Chertkov Xenia V. Borue Sergei I. Agulnik Jeremy J. Gibson-Brown Stephen R. Lyle Lee M. Silver 《Mammalian genome》2002,13(12):675-679
Mutations in the mouse Brachyury (T) gene are characterized by a dominant reduction of tail length and recessive lethality.
Two quantitative trait loci, Brachyury-modifier 1 and 2 (Brm1 and Brm2) are defined by alleles that enhance the short-tail
Brachyury phenotype. Here we report on a genetic analysis of a visible dominant mutation Abnormal feet and tail (Aft) located
in the vicinity of Brm1. Affected animals display kinky tails and syndactyly in the hindlimbs, both likely resulting from
a defect in apoptosis. We observed an unusual genetic incompatibility between Aft and certain genetic backgrounds. We show
that Aft and T are likely to interact genetically, since some double heterozygotes are tailless. In addition to the tail and
hindlimb phenotypes, Aft-bearing mutants display characteristic late-onset skin lesions. We therefore tested for allelism
between Aft and a closely linked recessive mutation rough coat (rc) and found that these two mutations are likely nonallelic.
Our results provide a valuable resource for the study of mammalian skin development and contribute to the genetic analysis
of Brachyury function. 相似文献
68.
Mark Schütte Philippe Thullier Thibaut Pelat Xenia Wezler Philip Rosenstock Dominik Hinz Martina Inga Kirsch Mike Hasenberg Ronald Frank Thomas Schirrmann Matthias Gunzer Michael Hust Stefan Dübel 《PloS one》2009,4(8)
Background
Aspergillus fumigatus is a common airborne fungal pathogen for humans. It frequently causes an invasive aspergillosis (IA) in immunocompromised patients with poor prognosis. Potent antifungal drugs are very expensive and cause serious adverse effects. Their correct application requires an early and specific diagnosis of IA, which is still not properly achievable. This work aims to a specific detection of A. fumigatus by immunofluorescence and the generation of recombinant antibodies for the detection of A. fumigatus by ELISA.Results
The A. fumigatus antigen Crf2 was isolated from a human patient with proven IA. It is a novel variant of a group of surface proteins (Crf1, Asp f9, Asp f16) which belong to the glycosylhydrolase family. Single chain fragment variables (scFvs) were obtained by phage display from a human naive antibody gene library and an immune antibody gene library generated from a macaque immunized with recombinant Crf2. Two different selection strategies were performed and shown to influence the selection of scFvs recognizing the Crf2 antigen in its native conformation. Using these antibodies, Crf2 was localized in growing hyphae of A. fumigatus but not in spores. In addition, the antibodies allowed differentiation between A. fumigatus and related Aspergillus species or Candida albicans by immunofluorescence microscopy. The scFv antibody clones were further characterized for their affinity, the nature of their epitope, their serum stability and their detection limit of Crf2 in human serum.Conclusion
Crf2 and the corresponding recombinant antibodies offer a novel approach for the early diagnostics of IA caused by A. fumigatus. 相似文献69.
70.
Garcia MX Alexander H Mahadeo D Cotter DA Alexander S 《Biochimica et biophysica acta》2003,1641(1):55-64
Changes in the levels of reactive oxygen species (ROS) have been associated previously with cell differentiation and development in several systems. Thus, there is interest in studying the developmental regulation of antioxidant enzymes, whose activities may modulate ROS levels and subsequent oxidant-mediated signal transduction events in specific tissues. Our recent identification in Dictyostelium discoideum of the prespore-specific catalase B (CatB) enzyme suggested (a) that the CatB enzyme functions to provide protection to the mature spores, and (b) that the CatB enzyme may have a regulatory role in cell differentiation and morphogenesis. We have now confirmed both these hypotheses. We specifically disrupted the catB gene by homologous recombination. The resulting catB null strain displays a 4-h delay in development at the time of normal catB gene expression, followed by slow and asynchronous development of fruiting bodies, taking 10 h longer than the isogenic parent strain. The expression of both prestalk- and prespore-specific genes was altered in the mutant both temporally and quantitatively, and the resultant mutant spores had increased sensitivity to H(2)O(2). This study supports the idea that CatB functions in the development of D. discoideum by regulating the level of ROS, and adds to the growing body of evidence for regulatory roles for ROS. 相似文献