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Stem cell research

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https://www.readbyqxmd.com/read/28545230/nanog-plays-a-hierarchical-role-in-the-transcription-network-regulating-the-pluripotency-and-plasticity-of-adipose-tissue-derived-stem-cells
#1
Maria Pitrone, Giuseppe Pizzolanti, Laura Tomasello, Antonina Coppola, Lorenzo Morini, Gianni Pantuso, Romina Ficarella, Valentina Guarnotta, Sebastio Perrini, Francesco Giorgino, Carla Giordano
The stromal vascular cell fraction (SVF) of visceral and subcutaneous adipose tissue (VAT and SAT) has increasingly come into focus in stem cell research, since these compartments represent a rich source of multipotent adipose-derived stem cells (ASCs). ASCs exhibit a self-renewal potential and differentiation capacity. Our aim was to study the different expression of the embryonic stem cell markers NANOG (homeobox protein NANOG), SOX2 (SRY (sex determining region Y)-box 2) and OCT4 (octamer-binding transcription factor 4) and to evaluate if there exists a hierarchal role in this network in ASCs derived from both SAT and VAT...
May 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28544655/3d-bioprinting-human-induced-pluripotent-stem-cell-constructs-for-in-situ-cell-proliferation-and-successive-multilineage-differentiation
#2
Qi Gu, Eva Tomaskovic-Crook, Gordon G Wallace, Jeremy M Crook
The ability to create 3D tissues from induced pluripotent stem cells (iPSCs) is poised to revolutionize stem cell research and regenerative medicine, including individualized, patient-specific stem cell-based treatments. There are, however, few examples of tissue engineering using iPSCs. Their culture and differentiation is predominantly planar for monolayer cell support or induction of self-organizing embryoids (EBs) and organoids. Bioprinting iPSCs with advanced biomaterials promises to augment efforts to develop 3D tissues, ideally comprising direct-write printing of cells for encapsulation, proliferation, and differentiation...
May 24, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28544497/cell-tracking-using-gold-nanoparticles-and-computed-tomography-imaging
#3
REVIEW
Rinat Meir, Rachela Popovtzer
Cell-based therapies utilize transplantation of living cells with therapeutic traits to alleviate numerous diseases and disorders. The use of such biological agents is an attractive alternative for diseases that existing medicine cannot effectively treat. Although very promising, translating cell therapy to the clinic has proven to be challenging, due to inconsistent results in preclinical and clinical studies. To examine the underlying cause for these inconsistencies, it is crucial to noninvasively monitor the accuracy of cell injection, and cell survival and migration patterns...
May 24, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28544217/towards-a-crispr-picture-use-of-crispr-cas9-to-model-diseases-in-human-stem-cells-in-vitro
#4
Jamie L Freiermuth, Ian J Powell-Castilla, G Ian Gallicano
Human induced pluripotent stem cells (iPSCs) can be differentiated into any cell in the body unlocking enormous research potential. Combined with the recent discovery of CRISPR/Cas9 endonucleases in bacteria and their modification for use in biomedical research, these methods have the potential to revolutionize the field of genetic engineering and open the door to generating in vitro models that more closely resemble the in vivo system than ever before. Use of CRISPR/Cas9 has created a whirlwind within the scientific community in the last few years, as the race to move beyond just disease analysis and towards the goal of gene and cell therapy moves further...
May 23, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28543661/building-the-next-bioethics-commission
#5
Alexander M Capron
At every moment, somewhere in the world, a group of men and women are sitting around a table deliberating about an ethical issue posed by medicine and research, whether as a research ethics committee; a hospital or clinical ethics committee; a stem-cell review committee; a gene transfer research committee; a biobank ethics committee; an ethics advisory committee for a medical or nursing association or nongovernmental organization; a state, provincial, national, or intergovernmental bioethics committee; or an ad hoc panel examining a particular development or case...
May 2017: Hastings Center Report
https://www.readbyqxmd.com/read/28543424/how-to-rethink-the-fourteen-day-rule
#6
Sarah Chan
Recently, attention has been drawn to the basic principles governing the use of human embryos in research: specifically, the so-called fourteen-day rule. This rule stipulates that human embryos should not be allowed to grow in vitro past fourteen days of development. For years, the fourteen-day limit was largely theoretical, since culture techniques were not sufficient to maintain embryos up to this point. Yet in the past year, research has suggested that growing embryos beyond fourteen days might be feasible and scientifically valuable...
May 2017: Hastings Center Report
https://www.readbyqxmd.com/read/28542563/evaluation-of-somatostatin-and-nucleolin-receptors-for-therapeutic-delivery-in-non-small-cell-lung-cancer-stem-cells-applying-the-somatostatin-analog-dotatate-and-the-nucleolin-targeting-aptamer-as1411
#7
Sif Holmboe, Pernille Lund Hansen, Helge Thisgaard, Ines Block, Carolin Müller, Niels Langkjær, Poul Flemming Høilund-Carlsen, Birgitte Brinkmann Olsen, Jan Mollenhauer
Cancer stem cells represent the putative tumor-driving subpopulation thought to account for drug resistance, relapse, and metastatic spread of epithelial and other cancer types. Accordingly, cell surface markers for therapeutic delivery to cancer stem cells are subject of intense research. Somatostatin receptor 2 and nucleolin are known to be overexpressed by various cancer types, which have elicited comprehensive efforts to explore their therapeutic utilization. Here, we evaluated somatostatin receptor 2 targeting and nucleolin targeting for therapeutic delivery to cancer stem cells from lung cancer...
2017: PloS One
https://www.readbyqxmd.com/read/28542481/effect-of-hyperbaric-oxygen-on-bdnf-release-and-neuroprotection-investigations-with-human-mesenchymal-stem-cells-and-genetically-modified-nih3t3-fibroblasts-as-putative-cell-therapeutics
#8
Jennifer Schulze, Odett Kaiser, Gerrit Paasche, Hans Lamm, Andreas Pich, Andrea Hoffmann, Thomas Lenarz, Athanasia Warnecke
Hyperbaric oxygen therapy (HBOT) is a noninvasive widely applied treatment that increases the oxygen pressure in tissues. In cochlear implant (CI) research, intracochlear application of neurotrophic factors (NTFs) is able to improve survival of spiral ganglion neurons (SGN) after deafness. Cell-based delivery of NTFs such as brain-derived neurotrophic factor (BDNF) may be realized by cell-coating of the surface of the CI electrode. Human mesenchymal stem cells (MSC) secrete a variety of different neurotrophic factors and may be used for the development of a biohybrid electrode in order to release endogenously-derived neuroprotective factors for the protection of residual SGN and for a guided outgrowth of dendrites in the direction of the CI electrode...
2017: PloS One
https://www.readbyqxmd.com/read/28542093/feasibility-and-applicability-of-antimicrobial-stewardship-in-immunocompromised-patients
#9
Elizabeth Robilotti, Marisa Holubar, Susan K Seo, Stan Deresinski
PURPOSE OF REVIEW: Antimicrobial stewardship is the primary intervention in the battle against antimicrobial resistance, but clinicians do not always apply many key antimicrobial stewardship principles to patients with significant immune defects due to lack of data and fear of bad outcomes. We review evidence regarding the application of stewardship principles to immunocompromised patients, with a focus on solid organ and hematopoietic stem cell transplant recipients. RECENT FINDINGS: Antimicrobial stewardship programs (ASPs), targeting immunocompromised patient populations such as oncology and transplant, are gaining traction...
May 24, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28541444/blood-brain-barrier-pericyte-importance-in-malignant-gliomas-what-we-can-learn-from-stroke-and-alzheimer-s-disease
#10
Sadhana Jackson, Ayman ElAli, Daniela Virgintino, Mark R Gilbert
The pericyte, a constitutive component of the central nervous system, is a poorly understood cell type that envelops the endothelial cell with the intended purpose of regulating vascular flow and endothelial cell permeability. Previous studies of pericyte function have been limited to a small number of disease processes such as ischemic stroke and Alzheimer's disease. Recently, publications have postulated a link between glioma stem cell differentiation and pericyte function. These studies suggest that there may be an important interaction of pericytes with tumor cells and other components of the tumor microenvironment in malignant primary glial neoplasms, most notably glioblastoma...
May 24, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28540499/cell-based-therapies-with-t-regulatory-cells
#11
REVIEW
Mateusz Gliwiński, Dorota Iwaszkiewicz-Grześ, Piotr Trzonkowski
CD4(+)CD25(high)FoxP3(+) T regulatory cells (Tregs) are immunodominant suppressors in the immune system. Tregs use various mechanisms to control immune responses. Preclinical data from animal models have confirmed the huge therapeutic potential of Tregs in many immune-mediated diseases. Hence, these cells are now on the road to translation to cell therapy in the clinic as the first clinical trials are accomplished. To date, clinical research has involved mainly hematopoietic stem cell transplantations, solid organ transplantations, and autoimmunity...
May 24, 2017: BioDrugs: Clinical Immunotherapeutics, Biopharmaceuticals and Gene Therapy
https://www.readbyqxmd.com/read/28539897/long-term-effects-of-haematopoietic-stem-cell-transplantation-after-pediatric-cancer-a-qualitative-analysis-of-life-experiences-and-adaptation-strategies
#12
Magali Lahaye, Isabelle Aujoulat, Christiane Vermylen, Bénédicte Brichard
Haematopoietic stem cell transplantation (HSCT) improves the survival rate of children and adolescents with malignant and non-malignant conditions; however, the physical, psychological and social burden of such a procedure is considerable both during and after treatment. The present qualitative study investigated the long-term effects of HSCT after pediatric cancer. Thirty adolescent and young adult (AYA) survivors (Mage = 23.61 years, SD = 5.21) participated in individual interviews and were invited to speak about their life experiences following their treatment and strategies they use to deal with their past medical experiences and the long-term sequelae...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28539643/myostatin-a-profibrotic-factor-and-the-main-inhibitor-of-striated-muscle-mass-is-present-in-the-penile-and-vascular-smooth-muscle
#13
I Kovanecz, M Masouminia, R Gelfand, D Vernet, J Rajfer, N F Gonzalez-Cadavid
Myostatin is present in striated myofibers but, except for myometrial cells, has not been reported within smooth muscle cells (SMC). We investigated in the rat whether myostatin is present in SMC within the penis and the vascular wall and, if so, whether it is transcriptionally expressed and associated with the loss of corporal SMC occurring in certain forms of erectile dysfunction (ED). Myostatin protein was detected by immunohistochemistry/fluorescence and western blots in the perineal striated muscles, and also in the SMC of the penile corpora, arteries and veins, and aorta...
May 25, 2017: International Journal of Impotence Research
https://www.readbyqxmd.com/read/28538706/the-importance-of-pericytes-in-healing-wounds-and-other-pathologies
#14
REVIEW
Hannah Thomas, Allison J Cowin, Stuart J Mills
Much of current research investigates the beneficial properties of mesenchymal stem cells (MSCs) as a treatment for wounds and other forms of injury. In this review, we bring attention to and discuss the role of the pericyte, a cell type which shares much of the differentiation potential and regenerative properties of the MSC as well as specific roles in the regulation of angiogenesis, inflammation and fibrosis. Pericytes have been identified as dysfunctional or depleted in many disease states, and observing the outcomes of pericyte perturbation in models of disease and wound healing informs our understanding of overall pericyte function and identifies these cells as an important target in the development of therapies to encourage healing...
May 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28537496/feeder-free-derivation-of-na%C3%A3-ve-human-pluripotent-stem-cells
#15
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/28536939/three-dimensional-co-culture-microfluidic-model-and-its-application-for-research-on-cancer-stem-like-cells-inducing-migration-of-endothelial-cells
#16
Yi Zhao, Xiaoqing Yan, Bo Li, Ming Ke, Sijia Chen, Zhiling Xu, Shaoxi Cai
OBJECTIVES: To build a three-dimensional co-culture model in a microfluidic device for cancer research and evaluate its feasibility by investigating cancer stem-like cells (SCs) induced migration of human umbilical vein endothelial cells (ECs). RESULTS: The microfluidic device provided two-dimensional and three-dimensional (2D/3D) culture and co-culture environments without affecting cell viability. The device also provided an effective concentration for the chemiotaxis of cells, and to support real-time monitoring of cell behavior...
May 23, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28536890/progress-and-future-prospectives-in-skin-on-chip-development-with-emphasis-on-the-use-of-different-cell-types-and-technical-challenges
#17
Lenie J van den Broek, Lambert I J C Bergers, Christianne M A Reijnders, Susan Gibbs
Understanding the healthy and diseased state of skin is important in many areas of basic and applied research. Although the field of skin tissue engineering has advanced greatly over the last years, current in vitro skin models still do not mimic the complexity of the human skin. Skin-on-chip and induced pluripotent stem cells (iPSC) might be key technologies to improve in vitro skin models. This review summarizes the state of the art of in vitro skin models with regard to cell sources (primary, cell line, iPSC) and microfluidic devices...
May 24, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28536379/plant-toxin-based-immunotoxins-for-cancer-therapy-a-short-overview
#18
REVIEW
Letizia Polito, Alice Djemil, Massimo Bortolotti
Immunotoxins are chimeric proteins obtained by linking a toxin to either an intact antibody or an antibody fragment. Conjugation can be obtained by chemical or genetic engineering, where the latter yields recombinant conjugates. An essential requirement is that the target molecule recognized by the antibody is confined to the cell population to be deleted, or at least that it is not present on stem cells or other cell types essential for the organism's survival. Hundreds of different studies have demonstrated the potential for applying immunotoxins to many models in pre-clinical studies and in clinical trials...
June 1, 2016: Biomedicines
https://www.readbyqxmd.com/read/28536141/melk-and-ezh2-cooperate-to-regulate-medulloblastoma-cancer-stem-like-cell-proliferation-and-differentiation
#19
Hailong Liu, Qianwen Sun, Youliang Sun, Junping Zhang, Hongyu Yuan, Shuhuan Pang, Xueling Qi, Haoran Wang, Mingshan Zhang, Honwei Zhang, Chunjiang Yu, Chunyu Gu
Medulloblastoma is the most common malignant brain tumor in children. Although accumulated research has suggested that cancer stem-like cells play a key role in medulloblastoma tumorigenesis, the specific molecular mechanism regarding proliferation remains elusive. Here, we reported that more abundant expression of maternal embryonic leucine-zipper kinase (MELK) and enhancer of zeste homolog 2 (EZH2) in medulloblastoma stem-like cells than in neural stem cells and the interaction between the two proteins could mediate the self-renewal of sonic hedgehog (SHH)-subtype medulloblastoma...
May 23, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28535522/restenosis-in-hemodialytic-fistulas-and-chronic-kidney-disease-associated-vascular-disease-two-pathologies-driven-by-metakaryotic-stem-cells
#20
Gianandrea Pasquinelli, William G Thilly, Elena V Gostjeva, Paola Todeschini, Giuseppe Cianciolo, Claudio Ronco, Gaetano La Manna
Chronic kidney disease (CKD) exacerbating vascular disease poses a major challenge to nephrology. Surgically placed vascular fistulas, as an aid to hemodialysis prior to kidney transplant, have extended many lives, while post-surgical restenosis closure of the fistula by smooth muscle cells affects many lives. When post-surgical restenosis is developed, palliative measures are almost always surgical: there are no effective drug treatments. In this study, we offer a testable hypothesis that effects of CKD on widely distributed vascular diseases and the phenomenon of fistula restenosis are both driven by the pathologic creation of non-dividing smooth muscle cells via asymmetric division of exponentially increasing metakaryotic stem cells...
2017: Contributions to Nephrology
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