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Transcription factor regeneration

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https://www.readbyqxmd.com/read/28522413/microglia-support-atf3-positive-neurons-following-hypoglossal-nerve-axotomy
#1
Tatsuhide Tanaka, Koichi Murakami, Yoshio Bando, Taichi Nomura, Ayami Isonishi, Shoko Morita-Takemura, Kouko Tatsumi, Akio Wanaka, Shigetaka Yoshida
Microglia are essential in developmental processes and maintenance of neuronal homeostasis. Experimental axotomy of motor neurons results in neurodegeneration, and microglia in motor nuclei become activated and migrate towards injured neurons. However, whether these activated microglia are protective or destructive to neurons remains controversial. In the present study, we transected the hypoglossal nerve in BALB/c mice, causing activating transcription factor 3 (ATF3) and growth associated protein 43 (GAP43) induction, and partial neuronal death...
May 15, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28522298/%C3%AE-cyclodextrin-induces-the-differentiation-of-resident-cardiac-stem-cells-to-cardiomyocytes-through-autophagy
#2
Xingxing Shi, Wenjing Li, Honghong Liu, Deling Yin, Jing Zhao
Cardiac stem cells (CSCs) have emerged as promising cell candidates to regenerate damaged hearts, because of the potential in differentiating to cardiomyocytes. However, the differentiation is difficult to trigger without inducers. Here we reported that β-cyclodextrin (β-CD) increased the expression of cardiac transcription factors (Nkx2.5 and GATA4), structural proteins (cardiac Troponin T, cTnt), transcriptional enhancer (Mef2c) and induced GATA4 nucleus translocation in adult resident CSCs, thus β-CD could be used to enhance myogenic transition...
May 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28522297/three-dimensional-spheroid-culture-promotes-the-stemness-maintenance-of-cranial-stem-cells-by-activating-pi3k-akt-and-suppressing-nf-%C3%AE%C2%BAb-pathways
#3
Da He, Ren-Xian Wang, Jian-Ping Mao, Bin Xiao, Da-Fu Chen, Wei Tian
Multipotent stem cells are one of the most powerful tools available for the bone regeneration. However, owing to various limitations, including a lack of tissue-specific stem cell identification, reconstruction of large cranial bone defects remains challenging. In the current study, we isolated a population of Sca-1(+)CD105(+)CD140a(+) stem cells from adult mouse calvarium and cultured them as three-dimensional spheroids. Although these cells shared similar surface antigens when grown in either monolayers or spheroids, the cranial stem cells grown in spheroids possessed enhanced multipotency and proliferation capacity...
May 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28522294/activating-transcription-factor-3-promotes-spinal-cord-regeneration-of-adult-zebrafish
#4
Lin-Fang Wang, Shu-Bing Huang, Hou-De Zhao, Chun-Jie Liu, Li Yao, Yan-Qin Shen
Zebrafish is an excellent model to study the mechanisms underlying successful central nervous system (CNS) regeneration. Previous study shows that activating transcription factor 3 (ATF3) promotes neurite outgrowth and is involved in optic nerve regeneration in zebrafish. Here, we used zebrafish model to investigate the role of ATF3 in regeneration following spinal cord injury (SCI). Quantitative polymerase chain reaction (qPCR) and in situ hybridization revealed that ATF3 mRNA levels increased at 12 h and 6 d following SCI...
May 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28517970/osteoblast-progenitors-enhance-osteogenic-differentiation-of-periodontal-ligament-stem-cells
#5
Miao Yu, Limei Wang, Pengfei Ba, Linxia Li, Long Sun, Xiaoqi Duan, Pishan Yang, Chengzhe Yang, Qinfeng Sun
BACKGROUND: Osteoblasts and periodontal ligament stem cells (PDLSCs) play an important role in maintaining physiological function of periodontal tissues and participating in periodontal regeneration. Elucidation of interactions between osteoblasts and PDLSCs will aid understanding of periodontal regeneration mechanisms. This study aimed to determine whether pre-osteoblasts can promote osteoblastic/cementoblastic differentiation of PDLSCs. METHODS: PDLSCs were cultured alone (control group), or co-cultured indirectly with human gingival fibroblasts (HGFs) (HGFs group) or MC3T3-E1 cells (OB groups)...
May 18, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28512649/purification-and-characterization-of-schwann-cells-from-adult-human-skin-and-nerve
#6
Jo Anne Stratton, Ranjan Kumar, Sarthak Sinha, Prajay Shah, Morgan Stykel, Yuval Shapira, Rajiv Midha, Jeff Biernaskie
Despite its modest capacity for regeneration, peripheral nervous system injury often results in significant long-term disability. Supplementing peripheral nervous system injury with autologous Schwann cells (SCs) may serve to rejuvenate the postinjury environment to enhance regeneration and ultimately improve functional outcomes. However, human nerve-derived SC (hN-SC) collection procedures require invasive surgical resection. Here, we describe the characterization of SCs from adult human skin (hSk-SCs) of four male donors ranging between 27 and 46 years old...
May 2017: ENeuro
https://www.readbyqxmd.com/read/28512473/vitamin-c-in-stem-cell-biology-impact-on-extracellular-matrix-homeostasis-and-epigenetics
#7
REVIEW
Cristina D'Aniello, Federica Cermola, Eduardo Jorge Patriarca, Gabriella Minchiotti
Transcription factors and signaling molecules are well-known regulators of stem cell identity and behavior; however, increasing evidence indicates that environmental cues contribute to this complex network of stimuli, acting as crucial determinants of stem cell fate. l-Ascorbic acid (vitamin C (VitC)) has gained growing interest for its multiple functions and mechanisms of action, contributing to the homeostasis of normal tissues and organs as well as to tissue regeneration. Here, we review the main functions of VitC and its effects on stem cells, focusing on its activity as cofactor of Fe(+2)/αKG dioxygenases, which regulate the epigenetic signatures, the redox status, and the extracellular matrix (ECM) composition, depending on the enzymes' subcellular localization...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28511717/pancreatic-%C3%AE-cell-regeneration-advances-in-understanding-the-genes-and-signaling-pathways-involved
#8
Solomon Afelik, Meritxell Rovira
Recent advances in β-cell regeneration in vivo are providing insights into the mechanisms involved in the conversion of distinct pancreatic cell lineages into β cells. These mechanisms mostly involve reactivation of the gene encoding the pancreatic endocrine cell-specifying transcription factor neurogenin-3.
May 16, 2017: Genome Medicine
https://www.readbyqxmd.com/read/28509407/il-1%C3%AE-inhibits-osteogenesis-of-human-bone-marrow-derived-mesenchymal-stem-cells-by-activating-foxd3-microrna-496-to-repress-wnt-signaling
#9
Jian Huang, Liang Chen
IL-1β, a major cytokine of pro-inflammatory response, has been implicated in bone loss. However, its effects on mesenchymal progenitor cells-associated bone regeneration remain elusive. Here, we investigated the role of microRNA for the regulation of osteogenesis by IL-1β in human bone marrow-derived mesenchymal stem cells (hBMMSC). Our data suggested homo sapiens (hsa)-miR-496 is induced by IL-1β in hBMMSC and mediates the decreased β-catenin expression. Reporter assays using the 3'-UTR of β-catenin demonstrated sequence-dependent gene suppression with hsa-miR-496...
May 16, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/28508358/degradomics-in-neurotrauma-profiling-traumatic-brain-injury
#10
Hadi Abou-El-Hassan, Fares Sukhon, Edwyn Jeremy Assaf, Hisham Bahmad, Hussein Abou-Abbass, Hussam Jourdi, Firas H Kobeissy
Degradomics has recently emerged as a subdiscipline in the omics era with a focus on characterizing signature breakdown products implicated in various disease processes. Driven by promising experimental findings in cancer, neuroscience, and metabolomic disorders, degradomics has significantly promoted the notion of disease-specific "degradome." A degradome arises from the activation of several proteases that target specific substrates and generate signature protein fragments. Several proteases such as calpains, caspases, cathepsins, and matrix metalloproteinases (MMPs) are involved in the pathogenesis of numerous diseases that disturb the physiologic balance between protein synthesis and protein degradation...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28502821/sasp-regulation-by-noncoding-rna
#11
REVIEW
Amaresh C Panda, Kotb Abdelmohsen, Myriam Gorospe
Noncoding RNAs (ncRNAs), including micro (mi)RNAs, long noncoding (lnc)RNAs, and circular (circ)RNAs, control specific gene expression programs by regulating transcriptional, post-transcriptional, and post-translational processes. Through their broad influence on protein expression and function, ncRNAs have been implicated in virtually all cellular processes such as proliferation, senescence, quiescence, differentiation, apoptosis, and the stress and immune responses. Senescence is a cellular phenotype associated with the physiologic decline of aging and with age-related pathologies...
May 11, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28502796/in-vivo-reprogramming-for-heart-regeneration-a-glance-at-efficiency-environmental-impacts-challenges-and-future-directions
#12
REVIEW
Behnam Ebrahimi
Replacing dying or diseased cells of a tissue with new ones that are converted from patient's own cells is an attractive strategy in regenerative medicine. In vivo reprogramming is a novel strategy that can circumvent the hurdles of autologous/allogeneic cell injection therapies. Interestingly, studies have demonstrated that direct injection of cardiac transcription factors or specific miRNAs into the infarct border zone of murine hearts following myocardial infarction converts resident cardiac fibroblasts into functional cardiomyocytes...
May 11, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28502669/biomimetic-tendon-extracellular-matrix-composite-gradient-scaffold-enhances-ligament-to-bone-junction-reconstruction
#13
Huanhuan Liu, Long Yang, Erchen Zhang, Rui Zhang, Dandan Cai, Shouan Zhu, Jisheng Ran, Varitsara Bunpetch, Youzhi Cai, Boon Chin Heng, Yejun Hu, Xuesong Dai, Xiao Chen, Hongwei Ouyang
Management of ligament/tendon-to-bone-junction healing remains a formidable challenge in the field of orthopedic medicine to date, due to deficient vascularity and multi-tissue transitional structure of the junction. Numerous strategies have been employed to improve ligament-bone junction healing, including delivery of stem cells, bioactive factors, and synthetic materials, but these methods are often inadequate at recapitulating the complex structure-function relationships at native tissue interfaces. Here, we developed an easily-fabricated and effective biomimetic composite to promote the regeneration of ligament-bone junction by physically modifying the tendon extracellular matrix (ECM) into a Random-Aligned-Random composite using ultrasound treatment...
May 11, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28501777/mir-140-bdnf-axis-regulates-normal-human-astrocyte-proliferation-and-lps-induced-il-6-and-tnf-%C3%AE-secretion
#14
Zhiming Tu, Yawei Li, Yuliang Dai, Lei Li, Guohua Lv, Ivan Chen, Bing Wang
Reactive astrocyte proliferation after spinal cord injury (SCI) contributes to glial scar formation that impedes axonal regeneration. The mechanisms underlying astrocyte proliferation upon injury remain partially understood. MicroRNAs (miRNAs) function as a major class of post-transcriptional gene expression regulators that participate in many biological processes. In this study, we focused on the functional role of miR-140 in normal human astrocyte (NHA) cell proliferation. Ectopic miR-140 expression significantly inhibited NHA cell viability and proliferation; miR-140 inhibition exerted the opposite function...
May 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28501623/efficient-direct-conversion-of-human-fibroblasts-into-myogenic-lineage-induced-by-co-transduction-with-mycl-and-myod1
#15
Junko Wakao, Tsunao Kishida, Shigehisa Fumino, Koseki Kimura, Kenta Yamamoto, Shinichiro Kotani, Katsura Mizushima, Yuji Naito, Toshikazu Yoshikawa, Tatsuro Tajiri, Osam Mazda
The skeletal muscle consists of contractile myofibers and plays essential roles for maintenance of body posture, movement, and metabolic regulation. During the development and regeneration of the skeletal muscle tissue, the myoblasts fuse into multinucleated myotubes that subsequently form myofibers. Transplantation of myoblasts may make possible a novel regenerative therapy against defects or dysfunction of the skeletal muscle. It is reported that rodent fibroblasts are converted into myoblast-like cells and fuse to form syncytium after forced expression of exogenous myogenic differentiation 1 (MYOD1) that is a key transcription factor for myoblast differentiation...
May 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28501131/microrna-203-promotes-liver-regeneration-after-partial-hepatectomy-in-cirrhotic-rats
#16
Xiao-Bo Chen, Xiao-Bo Zheng, Zhen-Xing Cai, Xian-Jian Lin, Ming-Qing Xu
BACKGROUND: Liver resection or partial hepatectomy (PH) is still the most commonly used therapeutic option for hepatocellular carcinoma (HCC) at present. However, the impaired regenerative ability induced by the accompanied liver cirrhosis is an important risk factor of posthepatectomy liver failure, and posthepatectomy liver failure is a feared complication that accounts for up to 75% of mortality after extensive liver resection. MicroRNA(miR)-203 is a tumor suppressor of HCC and may act as a positive intermediary in A20-enhanced interleukin (IL-6)/signal transducer and activator of transcription 3 (STAT3) pro-proliferative signals, which may promote liver regeneration after PH...
May 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28498296/interleukin-22-prevents-microbial-dysbiosis-and-promotes-intestinal-barrier-regeneration-following-acute-injury
#17
Adam M Hammer, Niya L Morris, Abigail R Cannon, Omair M Khan, Robin C Gagnon, Nellie V Movtchan, Ilse van Langeveld, Xiaoling Li, Bin Gao, Mashkoor A Choudhry
Intestine barrier disruption and bacterial translocation can contribute to sepsis and multiple organ failure- leading causes of mortality in burn-injured patients. Additionally, findings suggest ethanol (alcohol) intoxication at the time of injury worsens symptoms associated with burn injury. We have previously shown that interleukin-22 (IL-22) protects from intestinal leakiness and prevents overgrowth of Gram-negative bacteria following ethanol and burn injury, but how IL-22 mediates these effects has not been established...
May 11, 2017: Shock
https://www.readbyqxmd.com/read/28491023/characterization-of-the-transcriptomes-of-lgr5-hair-cell-progenitors-and-lgr5-supporting-cells-in-the-mouse-cochlea
#18
Cheng Cheng, Luo Guo, Ling Lu, Xiaochen Xu, ShaSha Zhang, Junyan Gao, Muhammad Waqas, Chengwen Zhu, Yan Chen, Xiaoli Zhang, Chuanying Xuan, Xia Gao, Mingliang Tang, Fangyi Chen, Haibo Shi, Huawei Li, Renjie Chai
Cochlear supporting cells (SCs) have been shown to be a promising resource for hair cell (HC) regeneration in the neonatal mouse cochlea. Previous studies have reported that Lgr5+ SCs can regenerate HCs both in vitro and in vivo and thus are considered to be inner ear progenitor cells. Lgr5+ progenitors are able to regenerate more HCs than Lgr5- SCs, and it is important to understand the mechanism behind the proliferation and HC regeneration of these progenitors. Here, we isolated Lgr5+ progenitors and Lgr5- SCs from Lgr5-EGFP-CreERT2/Sox2-CreERT2/Rosa26-tdTomato mice via flow cytometry...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28490659/runx-transcription-factors-at-the-interface-of-stem-cells-and-cancer
#19
REVIEW
Elitza Deltcheva, Rachael Nimmo
The RUNX1 transcription factor is a critical regulator of normal haematopoiesis and its functional disruption by point mutations, deletions or translocations is a major causative factor leading to leukaemia. In the majority of cases, genetic changes in RUNX1 are linked to loss of function classifying it broadly as a tumour suppressor. Despite this, several recent studies have reported the need for a certain level of active RUNX1 for the maintenance and propagation of acute myeloid leukaemia and acute lymphoblastic leukaemia cells, suggesting an oncosupportive role of RUNX1...
May 10, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28485389/egfr-dependent-tor-independent-endocycles-support-drosophila-gut-epithelial-regeneration
#20
Jinyi Xiang, Jennifer Bandura, Peng Zhang, Yinhua Jin, Hanna Reuter, Bruce A Edgar
Following gut epithelial damage, epidermal growth factor receptor/mitogen-activated protein kinase (EGFR/MAPK) signalling triggers Drosophila intestinal stem cells to produce enteroblasts (EBs) and enterocytes (ECs) that regenerate the gut. As EBs differentiate into ECs, they become postmitotic, but undergo extensive growth and DNA endoreplication. Here we report that EGFR/RAS/MAPK signalling is required and sufficient to drive damage-induced EB/EC growth. Endoreplication occurs exclusively in EBs and newborn ECs that inherit EGFR and active MAPK from fast-dividing progenitors...
May 9, 2017: Nature Communications
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