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Cellular reprograming

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https://www.readbyqxmd.com/read/29666931/genome-editing-and-induced-pluripotent-stem-cell-technologies-for-personalized-study-of-cardiovascular-diseases
#1
REVIEW
Young Wook Chun, Matthew D Durbin, Charles C Hong
PURPOSE OF REVIEW: The goal of this review is to highlight the potential of induced pluripotent stem cell (iPSC)-based modeling as a tool for studying human cardiovascular diseases. We present some of the current cardiovascular disease models utilizing genome editing and patient-derived iPSCs. RECENT FINDINGS: The incorporation of genome-editing and iPSC technologies provides an innovative research platform, providing novel insight into human cardiovascular disease at molecular, cellular, and functional level...
April 17, 2018: Current Cardiology Reports
https://www.readbyqxmd.com/read/29665673/cooperative-instruction-of-signaling-and-metabolic-pathways-on-the-epigenetic-landscape
#2
Jung-Ae Kim
Cells cope with diverse intrinsic and extrinsic stimuli in order to make adaptations for survival. The epigenetic landscape plays a crucial role in cellular adaptation, as it integrates the information generated from stimuli. Signaling pathways induced by stimuli communicate with chromatin to change the epigenetic landscape through regulation of epigenetic modifiers. Metabolic dynamics altered by these stimuli also affect the activity of epigenetic modifiers. Here, I review the current understanding of epigenetic regulation via signaling and metabolic pathways...
April 11, 2018: Molecules and Cells
https://www.readbyqxmd.com/read/29663886/microrna-regulation-along-the-course-of-cellular-reprogramming-to-pluripotency
#3
M Ishtiaq, M Waseem, R Mehmood
Generation of patient-specific stem cells has been a long-held aim of many developmental biologists. Apart from providing a source for stem cell therapies, these cells have the potential to be utilized in a number of scenarios like disease modeling, drug screening and studying normal development. Various approaches have been used to reprogram terminally differentiated cells to a pluripotent state with varying efficiencies and limitations. The nuclear transfer had been the most successful method for reprogramming until recently...
April 15, 2018: Current Molecular Medicine
https://www.readbyqxmd.com/read/29662623/cancer-reversion-with-oocyte-extracts-is-mediated-by-cell-cycle-arrest-and-induction-of-tumour-dormancy
#4
Norazalina Saad, Ramiro Alberio, Andrew D Johnson, Richard D Emes, Tom C Giles, Philip Clarke, Anna M Grabowska, Cinzia Allegrucci
Inducing stable control of tumour growth by tumour reversion is an alternative approach to cancer treatment when eradication of the disease cannot be achieved. The process requires re-establishment of normal control mechanisms that are lost in cancer cells so that abnormal proliferation can be halted. Embryonic environments can reset cellular programmes and we previously showed that axolotl oocyte extracts can reprogram breast cancer cells and reverse their tumorigenicity. In this study, we analysed the gene expression profiles of oocyte extract-treated tumour xenografts to show that tumour reprogramming involves cell cycle arrest and acquisition of a quiescent state...
March 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29661856/glutamine-utilizing-transaminases-are-a-metabolic-vulnerability-of-taz-yap-activated-cancer-cells
#5
Chih-Sheng Yang, Eleni Stampouloglou, Nathan M Kingston, Liye Zhang, Stefano Monti, Xaralabos Varelas
The transcriptional regulators TAZ and YAP (TAZ/YAP) have emerged as pro-tumorigenic factors that drive many oncogenic traits, including induction of cell growth, resistance to cell death, and activation of processes that promote migration and invasion. Here, we report that TAZ/YAP reprogram cellular energetics to promote the dependence of breast cancer cell growth on exogenous glutamine. Rescue experiments with glutamine-derived metabolites suggest an essential role for glutamate and α-ketoglutarate (AKG) in TAZ/YAP-driven cell growth in the absence of glutamine...
April 16, 2018: EMBO Reports
https://www.readbyqxmd.com/read/29661055/messenger-rna-delivery-for-tissue-engineering-and-regenerative-medicine-applications
#6
Siddharth Patel, Avathamsa Athirasala, Paula Dos Passos Menezes, Narayanan Ashwanikumar, Ting Zou, Gaurav Sahay, Luiz Bertassoni
The ability to control cellular processes and precisely direct cellular reprogramming has revolutionized regenerative medicine. Recent advances in in vitro transcribed (IVT) mRNA technology with chemical modifications have led to development of methods that control spatio-temporal gene expression. Additionally, there is a current thrust towards the development of safe, integration-free approaches to gene therapy for translational purposes. In this review, we describe strategies of synthetic IVT mRNA modifications and non-viral technologies for intracellular delivery...
April 17, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29660515/aspergillus-fumigatus-viability-drives-allergic-responses-to-inhaled-conidia
#7
Ajay P Nayak, Tara L Croston, Angela R Lemons, W T Goldsmith, Nikki B Marshall, Michael L Kashon, Dori R Germolec, Donald H Beezhold, Brett J Green
BACKGROUND: Aspergillus fumigatus induced allergic airway disease has been shown to involve conidial germination in vivo but the immunological mechanisms remain uncharacterized. OBJECTIVE: A subchronic murine exposure model was used to examine the immunological mediators that are regulated in response to either culturable or non-culturable A. fumigatus conidia. METHODS: Female B6C3F1/N mice were repeatedly dosed via inhalation with 1 x 105 viable or heat inactivated conidia (HIC), twice a week for 13 weeks (26 exposures)...
April 13, 2018: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29659513/chromatin-architectural-changes-during-cellular-senescence-and-aging
#8
REVIEW
Luyang Sun, Ruofan Yu, Weiwei Dang
Chromatin 3D structure is highly dynamic and associated with many biological processes, such as cell cycle progression, cellular differentiation, cell fate reprogramming, cancer development, cellular senescence, and aging. Recently, by using chromosome conformation capture technologies, tremendous findings have been reported about the dynamics of genome architecture, their associated proteins, and the underlying mechanisms involved in regulating chromatin spatial organization and gene expression. Cellular senescence and aging, which involve multiple cellular and molecular functional declines, also undergo significant chromatin structural changes, including alternations of heterochromatin and disruption of higher-order chromatin structure...
April 16, 2018: Genes
https://www.readbyqxmd.com/read/29659022/transcription-factor-rd26-is-a-key-regulator-of-metabolic-reprogramming-during-dark-induced-senescence
#9
Iman Kamranfar, Gang-Ping Xue, Takayuki Tohge, Mastoureh Sedaghatmehr, Alisdair R Fernie, Salma Balazadeh, Bernd Mueller-Roeber
Leaf senescence is a key process in plants that culminates in the degradation of cellular constituents and massive reprogramming of metabolism for the recovery of nutrients from aged leaves for their reuse in newly developing sinks. We used molecular-biological and metabolomics approaches to identify NAC transcription factor (TF) RD26 as an important regulator of metabolic reprogramming in Arabidopsis thaliana. RD26 directly activates CHLOROPLAST VESICULATION (CV), encoding a protein crucial for chloroplast protein degradation, concomitant with an enhanced protein loss in RD26 overexpressors during senescence, but a reduced decline of protein in rd26 knockout mutants...
April 16, 2018: New Phytologist
https://www.readbyqxmd.com/read/29657031/warming-induces-significant-reprogramming-of-beige-but-not-brown-adipocyte-cellular-identity
#10
Hyun Cheol Roh, Linus T Y Tsai, Mengle Shao, Danielle Tenen, Yachen Shen, Manju Kumari, Anna Lyubetskaya, Christopher Jacobs, Brian Dawes, Rana K Gupta, Evan D Rosen
Beige and brown adipocytes generate heat in response to reductions in ambient temperature. When warmed, both beige and brown adipocytes exhibit morphological "whitening," but it is unknown whether or to what extent this represents a true shift in cellular identity. Using cell-type-specific profiling in vivo, we uncover a unique paradigm of temperature-dependent epigenomic plasticity of beige, but not brown, adipocytes, with conversion from a brown to a white chromatin state. Despite this profound shift in cellular identity, warm whitened beige adipocytes retain an epigenomic memory of prior cold exposure defined by an array of poised enhancers that prime thermogenic genes for rapid response during a second bout of cold exposure...
April 5, 2018: Cell Metabolism
https://www.readbyqxmd.com/read/29653196/transcription-factors-in-regulatory-and-protein-subnetworks-during-generation-of-neural-stem-cells-and-neurons-from-direct-reprogramming-of-non-fibroblastic-cell-sources
#11
Mohammad Reza Omrani, Moein Yaqubi, Abdulshakour Mohammadnia
Direct reprogramming of non-fibroblastic cells to the neuronal cell types including induced neurons (iNs) and induced neural stem cells (iNSCs) has provided an alternative approach for the direct reprogramming of fibroblasts to those cells. However, to increase the efficiency of the reprogramming process the underlaying mechanisms should be clarified. In the current study, we analyzed the gene expression profiles of five different cellular conversions to understand the most significant molecular mechanisms and transcription factors (TFs) underlying each conversion...
April 10, 2018: Neuroscience
https://www.readbyqxmd.com/read/29651445/regulation-of-immune-cell-functions-by-metabolic-reprogramming
#12
REVIEW
Jaehong Kim
Recent findings show that the metabolic status of immune cells can determine immune responses. Metabolic reprogramming between aerobic glycolysis and oxidative phosphorylation, previously speculated as exclusively observable in cancer cells, exists in various types of immune and stromal cells in many different pathological conditions other than cancer. The microenvironments of cancer, obese adipose, and wound-repairing tissues share common features of inflammatory reactions. In addition, the metabolic changes in macrophages and T cells are now regarded as crucial for the functional plasticity of the immune cells and responsible for the progression and regression of many pathological processes, notably cancer...
2018: Journal of Immunology Research
https://www.readbyqxmd.com/read/29643333/srf-destabilizes-cellular-identity-by-suppressing-cell-type-specific-gene-expression-programs
#13
Takashi Ikeda, Takafusa Hikichi, Hisashi Miura, Hirofumi Shibata, Kanae Mitsunaga, Yosuke Yamada, Knut Woltjen, Kei Miyamoto, Ichiro Hiratani, Yasuhiro Yamada, Akitsu Hotta, Takuya Yamamoto, Keisuke Okita, Shinji Masui
Multicellular organisms consist of multiple cell types. The identity of these cells is primarily maintained by cell-type-specific gene expression programs; however, mechanisms that suppress these programs are poorly defined. Here we show that serum response factor (Srf), a transcription factor that is activated by various extracellular stimuli, can repress cell-type-specific genes and promote cellular reprogramming to pluripotency. Manipulations that decrease β-actin monomer quantity result in the nuclear accumulation of Mkl1 and the activation of Srf, which downregulate cell-type-specific genes and alter the epigenetics of regulatory regions and chromatin organization...
April 11, 2018: Nature Communications
https://www.readbyqxmd.com/read/29643171/fungal-morphogenesis-from-the-polarized-growth-of-hyphae-to-complex-reproduction-and-infection-structures
#14
REVIEW
Meritxell Riquelme, Jesús Aguirre, Salomon Bartnicki-García, Gerhard H Braus, Michael Feldbrügge, Ursula Fleig, Wilhelm Hansberg, Alfredo Herrera-Estrella, Jörg Kämper, Ulrich Kück, Rosa R Mouriño-Pérez, Norio Takeshita, Reinhard Fischer
Filamentous fungi constitute a large group of eukaryotic microorganisms that grow by forming simple tube-like hyphae that are capable of differentiating into more-complex morphological structures and distinct cell types. Hyphae form filamentous networks by extending at their tips while branching in subapical regions. Rapid tip elongation requires massive membrane insertion and extension of the rigid chitin-containing cell wall. This process is sustained by a continuous flow of secretory vesicles that depends on the coordinated action of the microtubule and actin cytoskeletons and the corresponding motors and associated proteins...
June 2018: Microbiology and Molecular Biology Reviews: MMBR
https://www.readbyqxmd.com/read/29629338/metabolic-symbiosis-and-immunomodulation-how-tumor-cell-derived-lactate-may-disturb-innate-and-adaptive-immune-responses
#15
REVIEW
Alexandre Morrot, Leonardo Marques da Fonseca, Eduardo J Salustiano, Luciana Boffoni Gentile, Luciana Conde, Alessandra Almeida Filardy, Tatiany Nunes Franklim, Kelli Monteiro da Costa, Celio Geraldo Freire-de-Lima, Leonardo Freire-de-Lima
The tumor microenvironment (TME) is composed by cellular and non-cellular components. Examples include the following: (i) bone marrow-derived inflammatory cells, (ii) fibroblasts, (iii) blood vessels, (iv) immune cells, and (v) extracellular matrix components. In most cases, this combination of components may result in an inhospitable environment, in which a significant retrenchment in nutrients and oxygen considerably disturbs cell metabolism. Cancer cells are characterized by an enhanced uptake and utilization of glucose, a phenomenon described by Otto Warburg over 90 years ago...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29627442/a-novel-role-of-endocan-in-alleviating-lps-induced-acute-lung-injury
#16
Xiaolong Zhang, Rong Zhuang, Haiya Wu, Jie Chen, Fangyan Wang, Guoping Li, Chengyun Wu
AIMS: Endotoxin induced acute lung injury (ALI) is a critical complication of some clinical illnesses. Endothelial cell dysfunction and excessive pro-inflammation cytokine release are pivotal to the injury of alveolar-capillary membrane which is the typical characteristic of endotoxic lung injury. As a potential marker of endothelial cells, endocan plays an important role in many endothelial-dependent pathophysiological diseases. We speculated that endocan have anti-inflammatory property in ALI...
April 5, 2018: Life Sciences
https://www.readbyqxmd.com/read/29627292/altered-cellular-metabolism-drives-trained-immunity
#17
Yahya Sohrabi, Rinesh Godfrey, Hannes M Findeisen
Exposing innate immune cells to an initial insult induces a long-term proinflammatory response due to metabolic and epigenetic alterations which encompass an emerging new concept called trained immunity. Recent studies provide novel insights into mechanisms centered on metabolic reprogramming which induce innate immune memory in hematopoietic stem cells and monocytes.
April 4, 2018: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/29626215/the-coming-of-age-of-chaperone-mediated-autophagy
#18
REVIEW
Susmita Kaushik, Ana Maria Cuervo
Chaperone-mediated autophagy (CMA) was the first studied process that indicated that degradation of intracellular components by the lysosome can be selective - a concept that is now well accepted for other forms of autophagy. Lysosomes can degrade cellular cytosol in a nonspecific manner but can also discriminate what to target for degradation with the involvement of a degradation tag, a chaperone and a sophisticated mechanism to make the selected proteins cross the lysosomal membrane through a dedicated translocation complex...
April 6, 2018: Nature Reviews. Molecular Cell Biology
https://www.readbyqxmd.com/read/29623532/genome-editing-in-induced-pluripotent-stem-cells-using-crispr-cas9
#19
REVIEW
Ronen Ben Jehuda, Yuval Shemer, Ofer Binah
The development of the reprogramming technology led to generation of induced Pluripotent Stem Cells (iPSC) from a variety of somatic cells. Ever since, fast growing knowledge of different efficient protocols enabled the differentiation of these iPSCs into different cells types utilized for disease modeling. Indeed, iPSC-derived cells have been increasingly used for investigating molecular and cellular pathophysiological mechanisms underlying inherited diseases. However, a major barrier in the field of iPSC-based disease modeling relies on discriminating between the effects of the causative mutation and the genetic background of these cells...
April 6, 2018: Stem Cell Reviews
https://www.readbyqxmd.com/read/29622030/mapping-human-pluripotent-stem-cell-differentiation-pathways-using-high-throughput-single-cell-rna-sequencing
#20
Xiaoping Han, Haide Chen, Daosheng Huang, Huidong Chen, Lijiang Fei, Chen Cheng, He Huang, Guo-Cheng Yuan, Guoji Guo
BACKGROUND: Human pluripotent stem cells (hPSCs) provide powerful models for studying cellular differentiations and unlimited sources of cells for regenerative medicine. However, a comprehensive single-cell level differentiation roadmap for hPSCs has not been achieved. RESULTS: We use high throughput single-cell RNA-sequencing (scRNA-seq), based on optimized microfluidic circuits, to profile early differentiation lineages in the human embryoid body system. We present a cellular-state landscape for hPSC early differentiation that covers multiple cellular lineages, including neural, muscle, endothelial, stromal, liver, and epithelial cells...
April 5, 2018: Genome Biology
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