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https://read.qxmd.com/read/30773261/loss-of-emp2-compromises-cardiogenic-differentiation-in-mouse-embryonic-stem-cells
#1
Yang Liu, Eleni Dakou, Ying Meng, Luc Leyns
Isolated mouse embryonic stem cells (mESCs) retain the capacities to self-renew limitlessly and to give rise to all tissues of an adult mouse. A precise understanding of the relationships, mechanisms of action and functions of novel genes involved in mESCs differentiation is crucial to expand our knowledge of vertebrate development. The epithelial membrane protein 2 (EMP2) is a membrane-spanning protein found in epithelial and endothelial cell-cell junctions that has been implicated in the regulation of cell proliferation and migration in normal and tumor tissues...
February 14, 2019: Biochemical and Biophysical Research Communications
https://read.qxmd.com/read/30771272/strategies-for-controlling-egress-of-therapeutic-cells-from-hydrogel-microcapsules
#2
Ainara Benavente-Babace, Kristina Haase, Duncan J Stewart, Michel Godin
Endothelial progenitor cells (EPCs) and human mesenchymal stem cells (hMSCs) have shown great regenerative potential to repair damaged tissue; however, their injection in vivo results in low retention and poor cell survival. Early clinical research has focused on cell-encapsulation, to improve viability and integration of delivered cells. However, this strategy has been limited by the inability to reproduce large volumes of standardized microcapsules and the lack of information on cell-specific egress and timed release from hydrogel microcapsules...
February 16, 2019: Journal of Tissue Engineering and Regenerative Medicine
https://read.qxmd.com/read/30769337/bioprinted-osteon-like-scaffolds-enhance-in-vivo-neovascularization
#3
Charlotte Piard, Hannah Baker, Timur Kamalitdinov, John P Fisher
Bone tissue engineers are facing a daunting challenge when attempting to fabricate bigger constructs intended for use in the treatment of large bone defects, which is the vascularization of the graft. Cell-based approaches and, in particular, the use of in vitro coculture of human umbilical vein endothelial cells (HUVECs) and human mesenchymal stem cells (MSCs) has been one of the most explored options. We present in this paper an alternative method to mimic the spatial pattern of HUVECs and hMSCs found in native osteons based on the use of extrusion-based 3D bioprinting (3DP)...
February 15, 2019: Biofabrication
https://read.qxmd.com/read/30767234/the-marrow-stem-cell-niche-in-normal-and-malignant-hematopoiesis
#4
REVIEW
Kenneth Kaushansky, Huichun Zhan
The hematopoietic niche is composed of endothelial cells, mesenchymal stromal cells of several types, and megakaryocytes, and functions to support the survival, proliferation, and differentiation of normal hematopoietic stem cells (HSCs). An abundance of evidence from a range of hematological malignancies supports the concept that the niche also participates in the pathogenesis of malignant hematopoiesis, differentially supporting malignant stem or progenitor cells over that of normal blood cell development...
February 14, 2019: Annals of the New York Academy of Sciences
https://read.qxmd.com/read/30761686/il-7-over-expression-enhances-therapeutic-potential-of-rat-bone-marrow-mesenchymal-stem-cells-for-diabetic-wounds
#5
Ramla Sana Khalid, Irfan Khan, Midhat Batool Zaidi, Nadia Naeem, Kanwal Haneef, Rida-E-Maria Qazi, Rakhshinda Habib, Tuba Shakil Malick, Anwar Ali, Asmat Salim
This study was aimed to enhance the healing potential of rat bone marrow mesenchymal stem cells against chronic diabetic wounds through interleukin-7 (IL-7) transfection. IL-7 plays an important role in wound healing and acts as a survival factor in some cell types. This study involves isolation, propagation and characterization of MSCs and their modification with IL-7 gene via retroviral transfection. Transfected MSCs were assessed for their effect on angiogenic genes by qPCR. Wound healing potential of transfected MSCs was analyzed by scratch assay in vitro and by transplanting these cells in rat diabetic wound models in vivo...
February 13, 2019: Wound Repair and Regeneration
https://read.qxmd.com/read/30760321/the-role-of-the-vasculature-niche-on-insulin-producing-cells-generated-by-transdifferentiation-of-adult-human-liver-cells
#6
Irit Meivar-Levy, Fatima Zoabi, Gil Nardini, Eugenia Manevitz-Mendelson, Gil S Leichner, Oranit Zadok, Michael Gurevich, Eytan Mor, Simona Dima, Irinel Popescu, Aviv Barzilai, Sarah Ferber, Shoshana Greenberger
BACKGROUND: Insulin-dependent diabetes is a multifactorial disorder that could be theoretically cured by functional pancreatic islets and insulin-producing cell (IPC) implantation. Regenerative medicine approaches include the potential for growing tissues and organs in the laboratory and transplanting them when the body cannot heal itself. However, several obstacles remain to be overcome in order to bring regenerative medicine approach for diabetes closer to its clinical implementation; the cells generated in vitro are typically of heterogenic and immature nature and the site of implantation should be readily vascularized for the implanted cells to survive in vivo...
February 13, 2019: Stem Cell Research & Therapy
https://read.qxmd.com/read/30758710/treatment-of-cancer-stem-cells-from-human-colon-adenocarcinoma-cell-line-ht-29-with-resveratrol-and-sulindac-induced-mesenchymal-endothelial-transition-rate
#7
Ayda Pouyafar, Aysa Rezabakhsh, Reza Rahbarghazi, Milad Zadi Heydarabad, Elhameh Shokrollahi, Emel Sokullu, Majid Khaksar, Alireza Nourazarian, Çığır Biray Avci
In the current experiment, the combined regime of resveratrol and a Wnt-3a inhibitor, sulindac, were examined on the angiogenic potential of cancer stem cells from human colon adenocarcinoma cell line HT-29 during 7 days. Cancer stem cells were enriched via a magnetic-activated cell sorter technique and cultured in endothelial induction medium containing sulindac and resveratrol. Expression of endothelial markers such as the von Willebrand factor (vWF) and vascular endothelial cadherin (VE-cadherin) and genes participating in mesenchymal-to-epithelial transition was studied by real-time PCR assay...
February 13, 2019: Cell and Tissue Research
https://read.qxmd.com/read/30747358/micropatterning-of-endothelial-cells-to-create-a-capillary-like-network-with-defined-architecture-by-laser-assisted-bioprinting
#8
Olivia Kérourédan, Jean-Michel Bourget, Murielle Rémy, Sylvie Crauste-Manciet, Jérôme Kalisky, Sylvain Catros, Noëlie B Thébaud, Raphaël Devillard
Development of a microvasculature into tissue-engineered bone substitutes represents a current challenge. Seeding of endothelial cells in an appropriate environment can give rise to a capillary-like network to enhance prevascularization of bone substitutes. Advances in biofabrication techniques, such as bioprinting, could allow to precisely define a pattern of endothelial cells onto a biomaterial suitable for in vivo applications. The aim of this study was to produce a microvascular network following a defined pattern and preserve it while preparing the surface to print another layer of endothelial cells...
February 12, 2019: Journal of Materials Science. Materials in Medicine
https://read.qxmd.com/read/30747045/engineered-human-adipose-derived-stem-cells-inducing-endothelial-lineage-and-angiogenic-response
#9
Amita Ajit, Santhoshkumar Thankayyan Retnabai, Lissy K Krishnan
Biotechnological interventions to engineer favorable biochemical environments that facilitate wound repair through quick attainment of vasculature are of immense demand. Potential of angiogenic factors (AF), notably vascular endothelial growth factor A (VEGF-A) and hypoxia-inducible factor-1α (Hif-1α) and the paracrine role of human adipose derived mesenchymal stromal cells (hADMSCs) in establishing vasculature has been reported. Independent application of AF or hADMSCs has led to clinical failure, pertaining to poor means of delivery, deprived bioavailability and insufficiency to drive adequate angiogenesis, respectively...
February 12, 2019: Tissue Engineering. Part C, Methods
https://read.qxmd.com/read/30745579/haematopoietic-stem-cell-activity-and-interactions-with-the-niche
#10
REVIEW
Sandra Pinho, Paul S Frenette
The haematopoietic stem cell (HSC) microenvironment in the bone marrow, termed the niche, ensures haematopoietic homeostasis by controlling the proliferation, self-renewal, differentiation and migration of HSCs and progenitor cells at steady state and in response to emergencies and injury. Improved methods for HSC isolation, driven by advances in single-cell and molecular technologies, have led to a better understanding of their behaviour, heterogeneity and lineage fate and of the niche cells and signals that regulate their function...
February 11, 2019: Nature Reviews. Molecular Cell Biology
https://read.qxmd.com/read/30740625/a-novel-approach-to-septal-perforation-repair-septal-cartilage-cells-induce-chondrogenesis-of-hascs-in-vitro
#11
Ayşe Sezim Şafak, Ezgi Avşar Abdik, Hüseyin Abdik, Pakize Neslihan Taşlı, Fikrettin Şahin
The aim of this study was to investigate the effect of medium harvested from septal cartilage cells on chondrogenic differentiation of adipose stem cells (hASCs) and to compare/contrast its properties to those of a commonly used standard medium formulation in terms of induction and maintenance of chondrogenic hASCs. Differentiation was carried out under three different conditions: septal cartilage medium-SCM, chondrogenic differentiation medium-CM, and 50:50 mixture of CM/SCM. Mesenchymal stem cells (MSCs) markers were determined by flow cytometry...
February 11, 2019: Applied Biochemistry and Biotechnology
https://read.qxmd.com/read/30739994/the-localization-and-distribution-of-cells-labeled-by-a-somatic-stem-cell-recognizing-antibody-a3-in-rat-colon-development-possible-presence-of-a-new-cell-type-forming-the-intestinal-stem-cell-niche
#12
Hironobu Nishina, Chisa Katou-Ichikawa, Mizuki Kuramochi, Takeshi Izawa, Mitsuru Kuwamura, Jyoji Yamate
A3, generated as a monoclonal antibody against rat malignant fibrous histiocytoma (MFH)-derived cloned cells, recognizes somatic stem cells (bone-marrow/hair follicle stem cells). We investigated the distribution of cells immunoreactive to A3 in the developing rat intestine (particularly, the colon), focusing on the ontogenic kinetics of A3-positive cells. In the rat intestine, A3 labeled spindle-shaped stromal cells localized in the submucosa and labeled endothelial cells of capillaries in the lamina propria forming villi in the early development stage...
January 2019: Journal of Toxicologic Pathology
https://read.qxmd.com/read/30739424/-vascular-endothelial-growth-factor-polylactide-polyethyleneglycol-polylactic-acid-copolymer-basic-fibroblast-growth-factor-mixed-microcapsules-in-promoting-angiogenic-differentiation-of-rat-bone-marrow-mesenchymal-stem-cells-in-vitro
#13
Shengli Zhao, Jie Yin, Qinghe Yu, Guowei Zhang, Shaoxiong Min
Objective: To observe the effect of vascular endothelial growth factor/polylactide-polyethyleneglycol-polylactic acid copolymer/basic fibroblast growth factor (VEGF/PELA/bFGF) mixed microcapsules in promoting the angiogenic differentiation of rat bone marrow mesenchymal stem cells (BMSCs) in vitro . Methods: The BMSCs were isolated by the method of whole bone marrow adherent, and sub-cultured. The passage 3 BMSCs were identified by Wright-Giemsa staining and flow cytometry, and used for subsequent experiments...
February 1, 2019: Chinese Journal of Reparative and Reconstructive Surgery
https://read.qxmd.com/read/30738131/chitosan-ascorbate-hydrogel-improves-water-uptake-capacity-and-cell-adhesion-of-electrospun-poly-epsilon-caprolactone-membranes
#14
Robin Augustine, Pan Dan, Inbar Schlachet, Didier Rouxel, Patrick Menu, Alejandro Sosnik
The most important prerequisites for wound coverage matrices are biocompatibility, adequate porosity, degradability and exudate uptake capacity. A moderate hydrophilicity and exudate uptake capacity can often favour cell adhesion and wound healing potential, however, most of the synthetic polymers like polycaprolactone (PCL) are hydrophobic. Hydrogels based on natural polymers can improve the hydrophilicity and exudate uptake capacity of synthetic dressings and improve healing. In this work, we report the development of chitosan ascorbate-infiltrated electrospun PCL membranes...
February 6, 2019: International Journal of Pharmaceutics
https://read.qxmd.com/read/30734535/pgs-scaffolds-promote-the-in-vivo-survival-and-directional-differentiation-of-bone-marrow-mesenchymal-stem-cells-restoring-the-morphology-and-function-of-wounded-rat-uterus
#15
Bang Xiao, Wenjun Yang, Dong Lei, Jinfeng Huang, Yupeng Yin, Yiqing Zhu, Zhengwei You, Fang Wang, Shuhan Sun
Intrauterine adhesion (IUA) causing infertility and recurrent miscarriage of reproductive female mammals usually results from endometrium injury. Nevertheless, there is no efficient therapeutic method to avoid IUA. Bone marrow derived mesenchymal stem cells (BMSCs) are an important cell source for tissue regeneration. This study designs and explores the ability of BMSC-loaded elastic poly(glycerol sebacate) (PGS) scaffold to prevent IUA and compares the effect of PGS with poly(lactic-co-glycolic acid) (PLGA) and collagen scaffolds in resumption of damaged rat uteruses...
February 7, 2019: Advanced Healthcare Materials
https://read.qxmd.com/read/30733301/hif-prolyl-hydroxylase-inhibitor-fg-4497-enhances-mouse-hematopoietic-stem-cell-mobilization-via-vegfr2-kdr
#16
Kavita Bisht, Marion E Brunck, Taichi Matsumoto, Crystal McGirr, Bianca Nowlan, Whitney Fleming, Thomas Keech, Graham Magor, Andrew C Perkins, Julie Davies, Gail Walkinshaw, Lee Flippin, Ingrid G Winkler, Jean-Pierre Levesque
In normoxia, hypoxia-inducible transcription factors (HIFs) are rapidly degraded within the cytoplasm as a consequence of their prolyl hydroxylation by oxygen-dependent prolyl hydroxylase domain (PHD) enzymes. We have previously shown that hematopoietic stem and progenitor cells (HSPCs) require HIF-1 for effective mobilization in response to granulocyte colony-stimulating factor (G-CSF) and CXCR4 antagonist AMD3100/plerixafor. Conversely, HIF PHD inhibitors that stabilize HIF-1 protein in vivo enhance HSPC mobilization in response to G-CSF or AMD3100 in a cell-intrinsic manner...
February 12, 2019: Blood Advances
https://read.qxmd.com/read/30720911/extracellular-vesicle-educated-macrophages-promote-early-achilles-tendon-healing
#17
Connie S Chamberlain, Anna B Clements, John A Kink, Ugeun Choi, Geoffrey S Baer, Matthew A Halanski, Peiman Hematti, Ray Vanderby
Tendon healing follows a complex series of coordinated events that ultimately produces a mechanically inferior tissue more scar-like than native tendon. More regenerative healing occurs when anti-inflammatory M2 macrophages play a more dominant role. Mesenchymal stromal/stem cells (MSCs) are able to polarize macrophages to an M2 immunophenotype via paracrine mechanisms. We previously reported that co-culture of CD14+ macrophages (MQs) with MSCs resulted in a unique M2-like macrophage. More recently, we generated M2-like macrophages using only extracellular vesicles (EVs) isolated from MSCs creating "EV-educated macrophages" (also called exosome-educated macrophages, EEMs), thereby foregoing direct use of MSCs...
February 5, 2019: Stem Cells
https://read.qxmd.com/read/30720220/exosomes-derived-from-sdf1-overexpressing-mesenchymal-stem-cells-inhibit-ischemic-myocardial-cell-apoptosis-and-promote-cardiac-endothelial-microvascular-regeneration-in-mice-with-myocardial-infarction
#18
Xu-He Gong, Hui Liu, Si-Jia Wang, Si-Wen Liang, Guo-Gan Wang
Exosomes extracted from mesenchymal stem cells (MSCs) was reported to reduce myocardial ischemia/reperfusion damage. Besides, stromal-derived factor 1 (SDF1a) functions as cardiac repair after myocardial infarction (MI). Therefore, the present study aims to identify whether exosomes (Exo) released from SDF1-overexpressing MSCs display a beneficial effect on ischemic myocardial infarction. Initially, a gain-of-function study was performed to investigate the function of SDF1 in ischemic myocardial cells and cardiac endothelial cells...
February 5, 2019: Journal of Cellular Physiology
https://read.qxmd.com/read/30718646/cadaverine-a-metabolite-of-the-microbiome-reduces-breast-cancer-aggressiveness-through-trace-amino-acid-receptors
#19
Tünde Kovács, Edit Mikó, András Vida, Éva Sebő, Judit Toth, Tamás Csonka, Anita Boratkó, Gyula Ujlaki, Gréta Lente, Patrik Kovács, Dezső Tóth, Péter Árkosy, Borbála Kiss, Gábor Méhes, James J Goedert, Péter Bai
Recent studies showed that changes to the gut microbiome alters the microbiome-derived metabolome, potentially promoting carcinogenesis in organs that are distal to the gut. In this study, we assessed the relationship between breast cancer and cadaverine biosynthesis. Cadaverine treatment of Balb/c female mice (500 nmol/kg p.o. q.d.) grafted with 4T1 breast cancer cells ameliorated the disease (lower mass and infiltration of the primary tumor, fewer metastases, and lower grade tumors). Cadaverine treatment of breast cancer cell lines corresponding to its serum reference range (100-800 nM) reverted endothelial-to-mesenchymal transition, inhibited cellular movement and invasion, moreover, rendered cells less stem cell-like through reducing mitochondrial oxidation...
February 4, 2019: Scientific Reports
https://read.qxmd.com/read/30710751/exosomes-from-hypoxia-treated-human-adipose-derived-mesenchymal-stem-cells-enhance-angiogenesis-through-vegf-vegf-r
#20
Yudi Han, Jing Ren, Yun Bai, Xuetao Pei, Yan Han
BACKGROUND: We previously reported that co-transplantation of exosomes from hypoxia-preconditioned adipose mesenchymal stem cells (ADSCs) improves the neoangiogenesis and survival of the grafted tissue. This study aimed to investigate the molecular mechanism of this protective effect. METHODS: Exosomes were collected from normoxia-treated (nADSC-Exo) or hypoxia--treated (hypADSC-Exo) human ADSCs, and their pro-angiogenic capacity was evaluated in human umbilical vein endothelial cells (HUVECs) and a nude mouse model of subcutaneous fat grafting...
January 30, 2019: International Journal of Biochemistry & Cell Biology
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