Browsing by Subject "GENE-EXPRESSION"
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Item Open Access A new non-enzymatic method for isolating human intervertebral disc cells preserves the phenotype of nucleus pulposus cells.(Cytotechnology, 2014-12) Tang, Xinyan; Richardson, William J; Fitch, Robert D; Brown, Christopher R; Isaacs, Robert E; Chen, JunCells isolated from intervertebral disc (IVD) tissues of human surgical samples are one of potential sources for the IVD cellular therapy. The purpose of this study was to develop a new non-enzymatic method, "tissue incubation", for isolating human IVD cells. The IVD tissues of annulus fibrosus (AF) and nucleus pulposus (NP) were incubated separately in tissue culture flasks with culture medium. After 7-10 days incubation, cells were able to migrate out of IVD tissues and proliferate in vitro. After 3-4 weeks culture, expanded cells were harvested by trypsinization, and the remaining tissues were transferred to a new flask for another round of incubation. The molecular phenotype of IVD cells from juvenile and adult human samples was evaluated by both flow cytometry analysis and immunocytochemical staining for the expression of protein markers of NP cells (CD24, CD54, CD239, integrin α6 and laminin α5). Flow cytometry confirmed that both AF and NP cells of all ages positively expressed CD54 and integrin α6, with higher expression levels in NP cells than in AF cells for the juvenile group sample. However, CD24 expression was only found in juvenile NP cells, and not in AF or older disc cells. Similar expression patterns for NP markers were also confirmed by immunocytochemistry. In summary, this new non-enzymatic tissue incubation method for cell isolation preserves molecular phenotypic markers of NP cells and may provide a valuable cell source for the study of NP regeneration strategies.Item Open Access Adaptive Transcriptome Profiling of Subterranean Zokor, Myospalax baileyi, to High- Altitude Stresses in Tibet.(Scientific reports, 2018-03-16) Cai, Zhenyuan; Wang, Liuyang; Song, Xiaoying; Tagore, Somnath; Li, Xiangfeng; Wang, Huihua; Chen, Jiarui; Li, Kexin; Frenkel, Zeev; Gao, Dahai; Frenkel-Morgenstern, Milana; Zhang, Tongzuo; Nevo, EviatarAnimals living at high altitudes have evolved distinct phenotypic and genotypic adaptations against stressful environments. We studied the adaptive patterns of altitudinal stresses on transcriptome turnover in subterranean plateau zokors (Myospalax baileyi) in the high-altitude Qinghai-Tibetan Plateau. Transcriptomes of zokors from three populations with distinct altitudes and ecologies (Low: 2846 m, Middle: 3282 m, High: 3,714 m) were sequenced and compared. Phylogenetic and principal component analyses classified them into three divergent altitudinal population clusters. Genetic polymorphisms showed that the population at H, approaching the uppermost species boundary, harbors the highest genetic polymorphism. Moreover, 1056 highly up-regulated UniGenes were identified from M to H. Gene ontologies reveal genes like EPAS1 and COX1 were overexpressed under hypoxia conditions. EPAS1, EGLN1, and COX1 were convergent in high-altitude adaptation against stresses in other species. The fixation indices (F ST and G ST )-based outlier analysis identified 191 and 211 genes, highly differentiated among L, M, and H. We observed adaptive transcriptome changes in Myospalax baileyi, across a few hundred meters, near the uppermost species boundary, regardless of their relatively stable underground burrows' microclimate. The highly variant genes identified in Myospalax were involved in hypoxia tolerance, hypercapnia tolerance, ATP-pathway energetics, and temperature changes.Item Open Access Assessment of CD37 B-cell antigen and cell of origin significantly improves risk prediction in diffuse large B-cell lymphoma(BLOOD, 2016-12-29) Xu-Monette, Zijun Y; Li, Ling; Byrd, John C; Jabbar, Kausar J; Manyam, Ganiraju C; de Winde, Charlotte Maria; van den Brand, Michiel; Tzankov, Alexandar; Visco, Carlo; Wang, Jing; Dybkaer, Karen; Chiu, April; Orazi, Attilio; Zu, Youli; Bhagat, Govind; Richards, Kristy L; Hsi, Eric D; Choi, William WL; Huh, Jooryung; Ponzoni, Maurilio; Ferreri, Andres JM; Moller, Michael B; Parsons, Ben M; Winter, Jane N; Wang, Michael; Hagemeister, Frederick B; Piris, Miguel A; van Krieken, J Han; Medeiros, L Jeffrey; Li, Yong; van Spriel, Annemiek B; Young, Ken HItem Open Access Integrative Regulatory Mapping Indicates that the RNA-Binding Protein HuR Couples Pre-mRNA Processing and mRNA Stability(MOLECULAR CELL, 2011-08-05) Mukherjee, Neelanjan; Corcoran, David L; Nusbaum, Jeffrey D; Reid, David W; Georgiev, Stoyan; Hafner, Markus; Ascano, Manuel; Tuschl, Thomas; Ohler, Uwe; Keene, Jack D