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Stem cell replacement

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https://www.readbyqxmd.com/read/28822354/3d-brain-organoids-derived-from-pluripotent-stem-cells-promising-experimental-models-for-brain-development-and-neurodegenerative-disorders
#1
REVIEW
Chun-Ting Lee, Raphael M Bendriem, Wells W Wu, Rong-Fong Shen
Three-dimensional (3D) brain organoids derived from human pluripotent stem cells (hPSCs), including embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs), appear to recapitulate the brain's 3D cytoarchitectural arrangement and provide new opportunities to explore disease pathogenesis in the human brain. Human iPSC (hiPSC) reprogramming methods, combined with 3D brain organoid tools, may allow patient-derived organoids to serve as a preclinical platform to bridge the translational gap between animal models and human clinical trials...
August 20, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28819363/combined-analysis-of-endothelial-hematopoietic-and-mesenchymal-stem-cell-compartments-shows-simultaneous-but-independent-effects-of-age-and-heart-disease
#2
Carine Ghem, Lucinara Dadda Dias, Roberto Tofani Sant'Anna, Renato A K Kalil, Melissa Markoski, Nance Beyer Nardi
Clinical trials using stem cell therapy for heart diseases have not reproduced the initial positive results obtained with animal models. This might be explained by a decreased regenerative capacity of stem cells collected from the patients. This work aimed at the simultaneous investigation of endothelial stem/progenitor cells (EPCs), mesenchymal stem/progenitor cells (MSCs), and hematopoietic stem/progenitor cells (HSCs) in sternal bone marrow samples of patients with ischemic or valvular heart disease, using flow cytometry and colony assays...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28816104/the-immune-response-to-allogeneic-differentiated-mesenchymal-stem-cells-in-the-context-of-bone-tissue-engineering
#3
Caoimhe H Kiernan, Eppo B Wolvius, Pieter A J Brama, Eric Farrell
The use of allogeneic differentiated mesenchymal stem cells (MSCs) to mediate bone formation may be a potential alternative to the current gold standards of bone repair. While it is known that undifferentiated MSCs are immunomodulatory and weakly immunogenic, the host immune reaction to differentiated MSCs is less known. Implantation of allogeneic osteogenic or chondrogenically differentiated MSC pellets may be promising routes to induce bone repair via the processes of intramembranous and endochondral ossification...
August 17, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/28814482/lrig1-gastric-isthmal-progenitor-cells-restore-normal-gastric-lineage-cells-during-damage-recovery-in-adult-mouse-stomach
#4
Eunyoung Choi, Tyler L Lantz, Gregory Vlacich, Theresa M Keeley, Linda C Samuelson, Robert J Coffey, James R Goldenring, Anne E Powell
OBJECTIVE: Lrig1 is a marker of proliferative and quiescent stem cells in the skin and intestine. We examined whether Lrig1-expressing cells are long-lived gastric progenitors in gastric glands in the mouse stomach. We also investigated how the Lrig1-expressing progenitor cells contribute to the regeneration of normal gastric mucosa by lineage commitment to parietal cells after acute gastric injury in mice. DESIGN: We performed lineage labelling using Lrig1-CreERT2/+;R26R-YFP/+ (Lrig1/YFP) or R26R-LacZ/+ (Lrig1/LacZ) mice to examine whether the Lrig1-YFP-marked cells are gastric progenitor cells...
August 16, 2017: Gut
https://www.readbyqxmd.com/read/28811674/regenerative-medicine-and-cell-based-approaches-to-restore-pancreatic-function
#5
REVIEW
Cara Ellis, Adam Ramzy, Timothy J Kieffer
The pancreas is a complex organ with exocrine and endocrine components. Many pathologies impair exocrine function, including chronic pancreatitis, cystic fibrosis and pancreatic ductal adenocarcinoma. Conversely, when the endocrine pancreas fails to secrete sufficient insulin, patients develop diabetes mellitus. Pathology in either the endocrine or exocrine pancreas results in devastating economic and personal consequences. The current standard therapy for treating patients with type 1 diabetes mellitus is daily exogenous insulin injections, but cell sources of insulin provide superior glycaemic regulation and research is now focused on the goal of regenerating or replacing β cells...
August 16, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28805791/low-circulating-mannan-binding-lectin-levels-correlate-with-increased-frequency-and-severity-of-febrile-episodes-in-myeloma-patients-who-undergo-asct-and-do-not-receive-antibiotic-prophylaxis
#6
E Eleutherakis-Papaiakovou, M-A Dimopoulos, E Kastritis, D Christoulas, M Roussou, M Migkou, M Gavriatopoulou, D Fotiou, I Panagiotidis, D C Ziogas, N Kanellias, C Papadimitriou, E Terpos
Patients with multiple myeloma (MM) who undergo autologous stem cell transplantation (ASCT) are susceptible to severe infections. Low levels of circulating mannan-binding lectin (MBL) are associated with increased risk of infection. In this prospective study, we evaluated 100 patients who underwent ASCT regarding the effect of MBL on the incidence and severity of febrile episodes. Seventeen patients had MBL levels <500 ng/mL (11 received antibiotic prophylaxis and 6 did not). Although there was no statistical difference regarding the development of febrile episodes between patients with low and normal MBL, among 17 patients with low MBL levels, six out of eleven patients who received antibiotic prophylaxis developed a febrile episode compared with six out of six patients who did not receive antibiotic prophylaxis and developed a febrile episode...
August 14, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28805694/progenitor-cells-from-cartilage-grade-specific-differences-in-stem-cell-marker-expression
#7
Marija Mazor, Annabelle Cesaro, Mazen Ali, Thomas M Best, Eric Lespessaille, Hechmi Toumi
Recent research has confirmed the presence of Mesenchymal stem cell (MSC)-like progenitors (MPC) in both normal and osteoarthritic cartilage. However, there is only limited information concerning how MPC markers are expressed with osteoarthritis (OA) progression. The purpose of this study was to compare the prevalence of various MPC markers in different OA grades. Human osteoarthritic tibial plateaus were obtained from ten patients undergoing total knee replacement. Each sample had been classified into a mild or severe group according to OARSI scoring...
August 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28798841/microfluidic-engineering-of-neural-stem-cell-niches-for-fate-determination
#8
Yachen Wang, Jingyun Ma, Na Li, Liang Wang, Liming Shen, Yu Sun, Yajun Wang, Jingyuan Zhao, Wenjuan Wei, Yan Ren, Jing Liu
Neural stem cell (NSC) transplantation has great therapeutic potential for neurodegenerative diseases and central nervous system injuries. Successful NSC replacement therapy requires precise control over the cellular behaviors. However, the regulation of NSC fate is largely unclear, which severely restricts the potential clinical applications. To develop an effective model, we designed an assembled microfluidic system to engineer NSC niches and assessed the effects of various culture conditions on NSC fate determination...
January 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28795951/gelma-collagen-blends-enable-drop-on-demand-3d-printablility-and-promote-angiogenesis
#9
Henrike Stratesteffen, Marius Johannes Köpf, Franziska Kreimendahl, Andreas Blaeser, Stefan Jockenhoevel, Horst Fischer
Effective vascularization is crucial for three dimensional (3D) printed hydrogel-cell constructs to efficiently supply cells with oxygen and nutrients. Till date, several hydrogel blends have been developed that allow the in vitro formation of a capillary-like network within the gels but comparatively less effort has been made to improve the suitability of the materials for a 3D bioprinting process. Therefore, we hypothesize that tailored hydrogel blends of photo-crosslinkable gelatin and type I collagen exhibit favorable 3D drop-on-demand printing characteristics in terms of rheological and mechanical properties and that further capillary-like network formation can be induced by co-culturing human umbilical vein endothelial cells (HUVEC) and human mesenchymal stem cells (hMSC) within the proposed blends...
August 10, 2017: Biofabrication
https://www.readbyqxmd.com/read/28792423/novel-%C3%AE-tcp-pva-bilayered-hydrogels-with-considerable-physical-and-bio-functional-properties-for-osteochondral-repair
#10
Hang Yao, Junpei Kang, Weichang Li, Jian Liu, Renjian Xie, Yingjun Wang, Sa Liu, Dong An Wang, Li Ren
Cartilage repairing graft had been widely studied and the osteochondral replacement hydrogels were proved to be an excellent method in research and clinical. However, it was difficult to solve three main issues in osteochondral replacement preparation at one time: surface lubrication, overall mechanical support and good simulations of cell regeneration. A novel integrated bilayered hydrogel osteochondral replacement was constructed by blending polyvinyl alcohol (PVA) and β-tricalcium phosphate (β-TCP) in this study...
August 9, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28791807/proceedings-regenerative-medicine-for-lung-diseases-a-cirm-workshop-report
#11
Lisa C Kadyk, Natalie D DeWitt, Brigitte Gomperts
The mission of the California Institute of Regenerative Medicine (CIRM) is to accelerate treatments to patients with unmet medical needs. In September 2016, CIRM sponsored a workshop held at the University of California, Los Angeles to discuss regenerative medicine approaches for treatment of lung diseases, and to identify the challenges remaining for advancing such treatments to the clinic and market approval. Workshop participants discussed current preclinical and clinical approaches to regenerative medicine in the lung, as well as the biology of lung stem cells and the role of stem cells in the etiology of various lung diseases...
August 9, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28789815/bioprinting-and-cellular-therapies-for-type-1-diabetes
#12
REVIEW
Dino J Ravnic, Ashley N Leberfinger, Ibrahim T Ozbolat
Type 1 diabetes mellitus is a chronic autoimmune disease that results from the destruction of beta (β) cells in the pancreatic islets, leading to loss of insulin production and resultant hyperglycemia. Recent developments in stem cell biology have generated much excitement for β-cell replacement strategies; β cells are one of many cell types in the complex islet environment and pancreas. In this Opinion, we discuss recent successful attempts to generate β cells and how this can be coupled with bioprinting technologies in order to fabricate pancreas tissues, which holds great potential for type 1 diabetes...
August 5, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28781074/activin-signals-through-smad2-3-to-increase-photoreceptor-precursor-yield-during-embryonic-stem-cell-differentiation
#13
Amy Q Lu, Evgenya Y Popova, Colin J Barnstable
In vitro differentiation of mouse embryonic stem cells (ESCs) into retinal fates can be used to study the roles of exogenous factors acting through multiple signaling pathways during retina development. Application of activin A during a specific time frame that corresponds to early embryonic retinogenesis caused increased generation of CRX(+) photoreceptor precursors and decreased PAX6(+) retinal progenitor cells (RPCs). Following activin A treatment, SMAD2/3 was activated in RPCs and bound to promoter regions of key RPC and photoreceptor genes...
July 18, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28780147/stem-cells-in-pulmonary-disease-and-regeneration
#14
REVIEW
Rohan R Nadkarni, Soumeya Abed, Jonathan S Draper
The epithelial cells lining the mammalian lung are subjected to constant interaction with the external environment, necessitating robust regeneration strategies to deal with cell loss due to natural turn over or damage arising via inhaled agents or disease. Since lung epithelium function extends beyond respiratory gas exchange to include roles such as immune defense and mucocillary clearance, a diverse complement of epithelial cell types exists that are regionally distributed along the respiratory tree and extensive surface area of the alveolar interface...
August 2, 2017: Chest
https://www.readbyqxmd.com/read/28777295/soymilk-improves-muscle-weakness-in-young-ovariectomized-female-mice
#15
Yuriko Kitajima, Shizuka Ogawa, Shintaro Egusa, Yusuke Ono
Estrogens play a key role in an extensive range of physiological functions in various types of tissues throughout the body in females. We previously showed that estrogen insufficiency caused muscle weakness that could be rescued by estrogen administration in a young female ovariectomized (OVX) mouse model. However, long-term estrogen replacement therapy increases risks of breast cancer and cardiovascular diseases. Soymilk contains plant-based protein and isoflavones that exert estrogen-like activity. Here we examined the effects of prolonged soymilk intake on muscle and its resident stem cells, called satellite cells, in the estrogen-insufficient model...
August 4, 2017: Nutrients
https://www.readbyqxmd.com/read/28771731/repairing-the-vibratory-vocal-fold
#16
Jennifer L Long
OBJECTIVE: A vibratory vocal fold replacement would introduce a new treatment paradigm for structural vocal fold diseases such as scarring and lamina propria loss. This work implants a tissue-engineered replacement for vocal fold lamina propria and epithelium in rabbits and compares histology and function to injured controls and orthotopic transplants. Hypotheses were that the cell-based implant would engraft and control the wound response, reducing fibrosis and restoring vibration. STUDY DESIGN: Translational research...
August 3, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28768055/harnessing-cxcr4-antagonists-in-stem-cell-mobilization-hiv-infection-ischemic-diseases-and-oncology
#17
REVIEW
Lun Kelvin Tsou, Ying-Huey Huang, Jen-Shin Song, Yi-Yu Ke, Jing-Kai Huang, Kak-Shan Shia
CXCR4 antagonists (e.g., Plerixafor(TM) ) have been successfully validated as stem cell mobilizers for peripheral blood stem cell transplantation. Applications of the CXCR4 antagonists have heralded the era of cell-based therapy and opened a potential therapeutic horizon for many unmet medical needs such as kidney injury, ischemic stroke, cancer, and myocardial infarction. In this review, we first introduce the central role of CXCR4 in diverse cellular signaling pathways and discuss its involvement in several disease progressions...
August 2, 2017: Medicinal Research Reviews
https://www.readbyqxmd.com/read/28763191/nanoporous-immunoprotective-device-for-stem-cell-derived-%C3%AE-cell-replacement-therapy
#18
Ryan Chang, Gaetano Faleo, Holger A Russ, Audrey V Parent, Susanna K Elledge, Daniel A Bernards, Jessica L Allen, Karina Villanueva, Matthias Hebrok, Qizhi Tang, Tejal A Desai
Encapsulation of human embryonic stem-cell-differentiated beta cell clusters (hES-βC) holds great promise for cell replacement therapy for the treatment of diabetics without the need for chronic systemic immune suppression. Here, we demonstrate a nanoporous immunoprotective polymer thin film cell encapsulation device that can exclude immune molecules while allowing exchange of oxygen and nutrients necessary for in vitro and in vivo stem cell viability and function. Biocompatibility studies show the device promotes neovascular formation with limited foreign body response in vivo...
August 7, 2017: ACS Nano
https://www.readbyqxmd.com/read/28763118/mechanical-stimulation-of-mesenchymal-stem-cells-implications-for-cartilage-tissue-engineering
#19
REVIEW
Niamh Fahy, Mauro Alini, Martin J Stoddart
Articular cartilage is a load-bearing tissue playing a crucial mechanical role in diarthrodial joints, facilitating joint articulation, and minimizing wear. The significance of biomechanical stimuli in the development of cartilage and maintenance of chondrocyte phenotype in adult tissues has been well documented. Furthermore, dysregulated loading is associated with cartilage pathology highlighting the importance of mechanical cues in cartilage homeostasis. The repair of damaged articular cartilage resulting from trauma or degenerative joint disease poses a major challenge due to a low intrinsic capacity of cartilage for self-renewal, attributable to its avascular nature...
August 1, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28758111/the-neuroprotective-effects-of-muscle-derived-stem-cells-via-brain-derived-neurotrophic-factor-in-spinal-cord-injury-model
#20
Donghe Han, Shurui Chen, Shiqiang Fang, Shiqiong Liu, Meihua Jin, Zhanpeng Guo, Yajiang Yuan, Yansong Wang, Chang Liu, Xifan Mei
Muscle-derived stem cells (MDSCs) possess multipotent differentiation and self-renewal capacities; however, the effects and mechanism in neuron injury remain unclear. The aim of this study was to investigate the effects of MDSCs on neuron secondary injury, oxidative stress-induced apoptosis. An in vivo study showed the Basso, Beattie, and Bresnahan (BBB) score and number of neurons significantly increased after MDSCs' transplantation in spinal cord injury (SCI) rats. An in vitro study demonstrated that MDSCs attenuated neuron apoptosis, and the expression of antioxidants was upregulated as well as the ratio of Bcl-2 and Bax in the MNT (MDSCs cocultured with injured neurons) group compared with the NT (injured neurons) group...
2017: BioMed Research International
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