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Stem Cells and Development

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https://www.readbyqxmd.com/read/28548571/correlation-of-cdc42-activity-with-cell-proliferation-and-palmitate-mediated-cell-death-in-human-umbilical-cord-wharton-s-jelly-derived-mesenchymal-stromal-cells
#1
Jun Lu, Qinghua Wang, Lianghu Huang, Huiyue Dong, Lingjing Lin, Jianming Tan
RHO GTPases regulate cell migration, cell-cycle progression, and cell survival in response to extracellular stimuli. However, the regulatory effects of RHO GTPases in mesenchymal stromal cells (MSCs) are unclear. Herein, we show that CDC42 acts as an essential factor in regulating cell proliferation and also takes part in lipotoxic effects of palmitate in human umbilical cord Wharton's jelly derived MSCs (hWJ-MSCs). Cultured human bone marrow (hBM-MSCs), adipose tissue (hAD-MSCs), and umbilical cord Wharton's jelly (hWJ-MSCs) derived cells had varying pro-inflammatory cytokine secretion levels and cell death rates when treated by palmitate...
May 26, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28537846/uremic-toxins-affect-the-imbalance-of-redox-state-and-overexpression-of-prolyl-hydroxylase-2-in-human-adipose-tissue-derived-mesenchymal-stem-cells-involved-in-wound-healing
#2
Vuong Cat Khanh, Kinuko Ohneda, Toshiki Kato, Toshiharu Yamashita, Fujio Sato, Kana Tachi, Osamu Ohneda
Chronic kidney disease (CKD) results in a delay in wound healing because of its complications such as uremia, anemia, and fluid overload. Mesenchymal stem cells (MSCs) are considered to be a candidate for wound healing because of the ability to recruit many types of cells. However, it is still unclear whether the CKD-adipose tissue-derived MSCs (CKD-AT-MSCs) have the same function in wound healing as healthy donor-derived normal AT-MSCs (nAT-MSCs). In this study, we found that uremic toxins induced elevated reactive oxygen species (ROS) expression in nAT-MSCs, resulting in the reduced expression of hypoxia-inducible factor-1α (HIF-1α) under hypoxic conditions...
May 24, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28537496/feeder-free-derivation-of-na%C3%A3-ve-human-pluripotent-stem-cells
#3
Emily Ward, Kirk Twaroski, Jakub Tolar
Human pluripotent stem cells (HPSCs) cultured in conditions that maintain pluripotency via FGF and TGFβ signaling have been described as being in a primed state. These cells have been shown to exhibit characteristics more closely related to mouse epiblast-derived stem cells than to so called naïve mouse PSCs said to possess a more ground state pluripotency that mimics the early mouse embryo inner cell mass. Initial attempts to create culture conditions favorable for generation of naïve HPSCs from primed HPSCs has required the use of mouse embryonic fibroblasts as a feeder layer to support this transition...
May 24, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28537488/capturing-human-na%C3%A3-ve-pluripotency-in-the-embryo-and-in-the-dish
#4
Ludovic Zimmerlin, Tea Soon Park, Elias T Zambidis
Although human embryonic stem cells (hESC) were first derived almost 20 years ago, it was only recently acknowledged that they share closer molecular and functional identity to post-implantation lineage-primed murine epiblast stem cells (EpiSC) than to naïve pre-implantation ICM-derived mouse embryonic stem cells (ESC). A myriad of transcriptional, epigenetic, biochemical, and metabolic attributes have now been described that distinguish naïve and primed pluripotent states in both rodents and humans. Conventional hESC and human induced pluripotent stem cells (hiPSC) appear to lack many of the defining hallmarks of naïve mouse ESC...
May 24, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28537471/characteristics-of-labial-gland-mesenchymal-stem-cells-of-healthy-individuals-and-patients-with-sj%C3%A3-gren-syndrome-a-preliminary-study
#5
Shiqin Wang, Hong Hua, Yixiang Wang
Sjögren's Syndrome (SS) is a systemic autoimmune disease characterized by focal lymphocytic infiltration into exocrine organs such as salivary and lacrimal glands, resulting in dry mouth and eyes, and other systemic injuries. The mesenchymal stem cells (MSCs) in the salivary glands of healthy individuals and patients with SS have not been extensively studied. The aim of this study was to eluciadate the characteristics of MSCs from the labial glands of healthy controls and of those from patients with SS in order to elucidate the related pathogenesis and uncover potential avenues for novel clinical interventions...
May 24, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28446066/a-novel-three-dimensional-culture-system-for-oligodendrocyte-precursor-cells
#6
Naohiro Egawa, Akihiro Shindo, Anna C Liang, Yang Du, Changhong Xing, Evan K Lo, Kanako Itoh, Hisanori Kinoshita, Takakuni Maki, Ryosuke Takahashi, Ryo Sudo, Myron Spector, Josephine Lok, Ken Arai
Oligodendrocytes are generated from oligodendrocyte precursor cells (OPCs). Mechanisms of OPC differentiation have been extensively examined with two-dimensional cell culture systems. However, these cellular events may be more accurately represented using a three-dimensional (3D) model. In this study, we report the development of a novel 3D OPC culture system using gels composed of a mixture of collagen and hyaluronan, wherein cultured rat primary OPCs can proliferate and differentiate into oligodendrocytes...
May 24, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28520534/cpg-island-methylation-correlates-with-the-use-of-alternative-promoter-for-usp44-gene-expression-in-human-pluripotent-stem-cells-and-testis
#7
Philippe Tropel, Laura Jung, Cécile André, Adeline Ndandougou, Stéphane Viville
Deubiquitinating enzymes may play a major regulatory role in pluripotent stem cells (PSCs) but few studies have investigated this topic. Within this family of enzymes, we found that the ubiquitin specific peptidase, USP44, is highly expressed in embryonic stem cells, induced PSCs and testes as compared to differentiated progenies and somatic organs. Analysis by qPCR and 5'RACE showed that alternate promoters are responsible for expression in PSCs and organs. We noticed 7 regions of transcription initiation, some of them with cell- or tissue-specific activity...
May 18, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28520516/mesenchymal-stem-cell-migration-and-proliferation-are-mediated-by-hypoxia-inducible-factor-1%C3%AE-upstream-of-notch-and-sumo-pathways
#8
María Ciria, Nahuel A García, Imelda Ontoria-Oviedo, Hernán González-King, Rubén Carrero, José Luis De La Pompa, José Anastasio Montero, Pilar Sepúlveda
Mesenchymal stem cells (MSCs) are effective in treating several pathologies. We and others have demonstrated that hypoxia or hypoxia-inducible factor 1 alpha (HIF-1α) stabilization improves several MSC functions, including cell adhesion, migration, and proliferation, thereby increasing their therapeutic potential. To further explore the mechanisms induced by HIF-1α in MSCs, we studied its relationship with Notch signaling and observed that overexpression of HIF-1α in MSCs increased protein levels of the Notch ligands Jagged 1-2 and Delta-like (Dll)1, Dll3, and Dll4 and potentiated Notch signaling only when this pathway was activated...
May 18, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28447876/intrinsic-mesenchymal-stem-cell-dysfunction-in-diabetes-mellitus-implications-for-autologous-cell-therapy
#9
Mari van de Vyver
Mesenchymal stem cells derived from bone marrow (BM-MSCs) have multifunctional properties that have made them a promising therapeutic agent for many regenerative, anti-inflammatory, and autoimmune applications. Under chronic pathological conditions, however, BM-MSCs can become functionally compromised due to long-term exposure to changes in the systemic and localized stem cell niche microenvironments. In addition to the fact that functionally compromised BM-MSCs may be therapeutically ineffective, impairment of BM-MSCs is potentially a contributing factor to disease progression and development of comorbidities...
May 18, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28446071/human-neural-stem-cell-therapy-for-chronic-ischemic-stroke-charting-progress-from-laboratory-to-patients
#10
John D Sinden, Caroline Hicks, Paul Stroemer, Indira Vishnubhatla, Randolph Corteling
Chronic disability after stroke represents a major unmet neurologic need. ReNeuron's development of a human neural stem cell (hNSC) therapy for chronic disability after stroke is progressing through early clinical studies. A Phase I trial has recently been published, showing no safety concerns and some promising signs of efficacy. A single-arm Phase II multicenter trial in patients with stable upper-limb paresis has recently completed recruitment. The hNSCs administrated are from a manufactured, conditionally immortalized hNSC line (ReNeuron's CTX0E03 or CTX), generated with c-mycER(TAM) technology...
May 18, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28298159/biological-behavior-of-human-nucleus-pulposus-mesenchymal-stem-cells-in-response-to-changes-in-the-acidic-environment-during-intervertebral-disc-degeneration
#11
Jianjun Liu, Hui Tao, Hanbang Wang, Fulong Dong, Renjie Zhang, Jie Li, Peng Ge, Peiwen Song, Huaqing Zhang, Peng Xu, Xiaoying Liu, Cailiang Shen
An acidic environment is vital for the maintenance of cellular activities but can be affected tremendously during intervertebral disc degeneration (IVDD). The effect of changes in the acidity of the environment on human nucleus pulposus mesenchymal stem cells (NP-MSCs) is, however, unknown. Thus, this study aimed to observe the biological effects of acidic conditions mimicking a degenerated intervertebral disc on NP-MSCs in vitro. NP-MSCs were isolated from patients with lumbar disc herniation and were further identified by their immunophenotypes and multilineage differentiation...
May 18, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28401804/human-umbilical-cord-mesenchymal-stromal-cells-improve-survival-and-bacterial-clearance-in-neonatal-sepsis-in-rats
#12
Yueniu Zhu, Liqun Xu, Jennifer J P Collins, Arul Vadivel, Chanèle Cyr-Depauw, Shumei Zhong, Lars Mense, Marius A Möbius, Bernard Thébaud
Sepsis is the main cause of morbidity and mortality in neonates. Mesenchymal stromal cells (MSCs) are potent immune-modulatory cells. Their effect in neonatal sepsis has never been explored. We hypothesized that human umbilical cord-derived MSCs (hUC-MSCs) improve survival in experimental neonatal sepsis. Sepsis was induced in 3-day-old rats by intravenous injection of Escherichia coli (5 × 10(5)/rat). One hour after infection, rats were treated intravenously with normal saline, hUC-MSCs, or with interferon-γ preconditioned hUC-MSCs (10(7) cells/kg)...
May 17, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28398169/paving-the-way-toward-complex-blood-brain-barrier-models-using-pluripotent-stem-cells
#13
Karin Lauschke, Lise Frederiksen, Vanessa Jane Hall
A tissue with great need to be modeled in vitro is the blood-brain barrier (BBB). The BBB is a tight barrier that covers all blood vessels in the brain and separates the brain microenvironment from the blood system. It consists of three cell types [neurovascular unit (NVU)] that contribute to the unique tightness and selective permeability of the BBB and has been shown to be disrupted in many diseases and brain disorders, such as vascular dementia, stroke, multiple sclerosis, and Alzheimer's disease. Given the progress that pluripotent stem cells (PSCs) have made in the past two decades, it is now possible to produce many cell types from the BBB and even partially recapitulate this complex tissue in vitro...
May 17, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28494695/the-role-of-integrin-%C3%AE-6-cd49f-in-stem-cells-more-than-a-conserved-biomarker
#14
Paul H Krebsbach, Luis Gerardo Villa-Diaz
Stem cells have the capacity for self-renewal and differentiation into specialized cells that form and repopulated all tissues and organs, from conception to adult life. Depending on their capacity for differentiation, stem cells are classified as totipotent (i.e., zygote), pluripotent (i.e., embryonic stem cells) and multipotent (i.e., neuronal stem cells, hematopoietic stem cells, epithelial stem cells, etc.). Adult, or tissue-specific stem cells, reside in specific niches located in, or nearby, their organ or tissue of origin...
May 11, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28494646/a-randomized-study-comparing-stem-cell-transplantation-vs-conventional-therapy-for-low-and-intermediate-risk-myelodysplastic-syndrome-patients
#15
Zhengping Yu, Jiahua Ding, Aining Sun, Zheng Ge, Baoan Chen, Depei Wu
The treatment of myelodysplastic syndromes (MDS) involves improving patient survival and quality of life and decreasing the likelihood of progression to AML. Although the treatment outcomes of MDS remain unsatisfactory, few comparative studies have been performed comparing the outcomes of low-risk and intermediate-risk patients treated with supportive care and chemotherapeutics to those of patients treated with allo-HSCT. Therefore, we designed a clinical control study to compare the outcomes of supportive care and chemotherapeutics versus allo-HSCT treatment in MDS patients...
May 11, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28494644/the-alpha-7-nicotinic-acetylcholine-receptor-of-deciduous-dental-pulp-stem-cells-regulates-osteoclastogenesis-during-physiological-root-resorption
#16
Lulu Wang, Zhifei Zhou, Yujiang Chen, Shuai Yuan, Yang Du, Xinke Ju, Lizheng Wu, Xiaojing Wang
The physiological root resorption of deciduous teeth is a normal phenomenon, but the mechanisms underlying this process are still unclear. In this study, deciduous dental pulp stem cells (DDPSCs) and permanent dental pulp stem cells (DPSCs) were derived from deciduous teeth and normal permanent teeth at different stages of resorption. In the middle stage of root resorption, DDPSCs exhibited an increase in the ability to induce osteoclast differentiation. Activation of the alpha 7 nicotinic acetylcholine receptor (α7 nAChR) by secretory mammalian Ly-6 urokinase-type plasminogen activator receptor-associated protein 1 (SLURP-1) caused a significant increase in the expression levels of NF-κB, RANKL and the ratio of RANKL/OPG...
May 11, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28490256/how-plastic-are-pericytes
#17
Alexander Birbrair, Isabella da Terra Borges, Isadora Fernandes Gilson Sena, Gregório Guilherme Almeida, Lindolfo da Silva Meirelles, Ricardo Gonçalves, Akiva Mintz, Osvaldo Delbono
Pericytes are defined by both their anatomical location and molecular markers. Numerous publications have reported their role as stem cells, contributing to the formation of tissues other than blood vessels. However, using cell-lineage tracing in a new transgenic mouse model, Guimarães-Camboa et al. (2017) show that in the context of aging and some pathologies, Tbx18+ pericytes do not function as stem cells in vivo. Their study challenges the current view that pericytes can differentiate into other cells and reopens questions about their plasticity...
May 10, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28376684/equine-mesenchymal-stromal-cells-retain-a-pericyte-like-phenotype
#18
Cristina L Esteves, Tara A Sheldrake, Lucy Dawson, Timothy Menghini, Burgunde Elisabeth Rink, Karin Amilon, Nusrat Khan, Bruno Péault, Francesc Xavier Donadeu
Mesenchymal stem/stromal cells (MSCs) have been used in human and equine regenerative medicine, and interest in exploiting their potential has increased dramatically over the years. Despite significant effort to characterize equine MSCs, the actual origin of these cells and how much of their native phenotype is maintained in culture have not been determined. In this study, we investigated the relationship between MSCs, derived from adipose tissue (AT) and bone marrow (BM), and pericytes in the horse. Both pericyte (CD146, NG2, and αSMA) and MSC (CD29, CD90, and CD73) markers were detected in equine AT and colocalized around blood vessels...
May 9, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28474540/generation-of-canine-induced-extraembryonic-endoderm-like-cell-line-that-forms-both-extraembryonic-and-embryonic-endoderm-derivatives
#19
Toshiya Nishimura, Naoya Unezaki, Ryoji Kanegi, Himali Daluthgamage Patsy Wijesekera, Shingo Hatoya, Kikuya Sugiura, Noritoshi Kawate, Hiromichi Tamada, Hiroshi Imai, Toshio Inaba
Extraembryonic endoderm (XEN) cells are stem cell lines derived from primitive endoderm cells of inner cell mass in blastocysts. These cells have self-renewal properties and differentiate into visceral endoderm (VE) and parietal endoderm (PE) of the yolk sac. Recently, it has been reported that XEN cells can contribute to fetal embryonic endoderm and their unique potency has been evaluated. Here, we have described the induction and characterization of new canine stem cell lines that closely resemble to XEN cells...
May 5, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28474535/long-term-propagation-of-porcine-undifferentiated-spermatogonia
#20
Pengfei Zhang, Xiaoxu Chen, Yi Zheng, Jinsheng Zhu, Yuwei Qin, Yinghua Lv, Wenxian Zeng
Spermatogonial stem cells (SSCs) provide the foundation for spermatogenesis and fertility throughout the adult life of a male. Genetic manipulations of SSCs combined with germ cell transplantation present a novel approach for gene therapy and production of genetically modified animals. However, the rarity of SSCs within mammalian testes remains an impediment to related applications that require sufficient numbers of SSCs, making in vitro expansion of SSCs a prerequisite. Nevertheless, long-term culture systems of SSCs from large animals have not been established yet...
May 5, 2017: Stem Cells and Development
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