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stem cell development

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https://www.readbyqxmd.com/read/28945007/nonmineralized-and-mineralized-collagen-scaffolds-induce-differential-osteogenic-signaling-pathways-in-human-mesenchymal-stem-cells
#1
Qi Zhou, Xiaoyan Ren, David Bischoff, Daniel W Weisgerber, Dean T Yamaguchi, Timothy A Miller, Brendan A C Harley, Justine C Lee
The instructive capabilities of extracellular matrix components in progenitor cell differentiation have recently generated significant interest in the development of bioinspired materials for regenerative applications. Previously, a correlation was described between the osteogenic capabilities of nanoparticulate mineralized collagen glycosaminoglycan scaffolds (MC-GAG) and an autogenous activation of small mothers against decapentaplegic ( Smad1/5) in the canonical bone morphogenetic protein receptor (BMPR) pathway with a diminished extracellular signal regulated kinase 1/2 (ERK1/2) activation when compared to nonmineralized collagen glycosaminoglycan scaffolds (Col-GAG)...
September 25, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28944953/nk-cells-produce-high-levels-of-il-10-early-after-allogeneic-stem-cell-transplantation-and-suppress-development-of-acute-gvhd
#2
Yl Tracey Chan, Jianmin Zuo, Charlotte Inman, Wayne Croft, Jusnara Begum, Joanne Croudace, Francesca Kinsella, Luke Maggs, Sandeep Nagra, Jane Nunnick, Ben Abbotts, Charles Craddock, Ram Malladi, Paul Moss
Natural killer (NK) cells rapidly reconstitute following allogeneic stem cell transplantation (allo-SCT), at the time when alloreactive T cell immunity is being established. We investigated very early NK cell reconstitution in 82 patients following T cell-depleted allo-SCT. NK cell number rapidly increased, exceeding T cell reconstitution such that the NK:T cell ratio was over 40 by day 14. NK cells at day 14 (NK-14) were donor-derived, intensely proliferating and expressed chemokine receptors targeted to lymphoid and peripheral tissue...
September 25, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28944841/microrna%C3%A2-138%C3%A2-5p-regulates-neural-stem-cell-proliferation-and-differentiation-in%C3%A2-vitro-by-targeting-trip6-expression
#3
Juan Wang, Jixia Li, Jian Yang, Lianguo Zhang, Shane Gao, Fei Jiao, Maoli Yi, Jun Xu
Research on neural stem cells (NSCs) has recently focused on microRNAs (miRNAs), a class of small non‑coding RNAs that have crucial roles in regulating NSC proliferation and differentiation. In the present study, a quantitative‑polymerase chain reaction assay revealed that the expression of miRNA (miR)‑138‑5p was significantly decreased during neural differentiation of NSCs in vitro. Overexpression of miR‑138‑5p reduced NSC proliferation and increased NSC differentiation. Furthermore, suppression of miR‑138‑5p via transfection with a miRNA inhibitor enhanced NSC proliferation and attenuated NSC differentiation...
September 18, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944762/a-cell-laden-hybrid-fiber-hydrogel-composite-for-ligament-regeneration-with-improved-cell-delivery-and-infiltration
#4
Jeong Hwa Kim, Yeong-Jin Choi, Hee-Gyeong Yi, Joon Ho Wang, Dong-Woo Cho, Young Hun Jeong
Ligament, a fibrous connective tissue between bones, is a unique tissue in human anatomy because it has complex viscoelastic properties and is very tough. Moreover, it is an important tissue for regeneration because frequent injuries occur, but there are limited types of substitutes that can be used as a tissue replacement. In this study, we present a stem cell-laden fiber/hydrogel composite structure with a layered fibrous structure, which can enhance cell infiltration, topographical cue and mechanical properties...
September 25, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28944661/tempo-conjugated-gold-nanoparticles-for-reactive-oxygen-species-scavenging-and-regulation-of-stem-cell-differentiation
#5
Jingchao Li, Jing Zhang, Ying Chen, Naoki Kawazoe, Guoping Chen
Controlling the differentiation of human mesenchymal stem cells (hMSCs) shows a great potential in regenerative medicine. Because overproduced reactive oxygen species (ROS) have obvious inhibitory effect on the differentiation and functions of hMSCs, it is highly desirable to develop effective strategy for ROS scavenging and stem cell differentiation controlling. In this study, gold nanoparticles (Au NPs) with an average size of 40 nm were conjugated with 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) to endow them with ROS scavenging capacity while holding the beneficial effect of Au NPs...
September 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28944484/the-stem-cell-club-a-model-for-unrelated-stem-cell-donor-recruitment
#6
Warren Fingrut, Simran Parmar, Ari Cuperfain, Kiran Rikhraj, Erin Charman, Emilie Ptak, Manjot Kahlon, Alice Graham, Susan Luong, Yongjun George Wang, Janice Yu, Neha Arora, Roopa Suppiah, Edward W Li, Anna Lee, Christopher Welsh, Menachem Benzaquen, Alicia Thatcher, Iman Baharmand, Aedan Ladd, Tanya Petraszko, David Allan, Hans Messner
BACKGROUND: Patients with blood, immune, or metabolic diseases may require a stem cell transplant as part of their treatment. However, 70% of patients do not have a suitable human leukocyte antigen match in their family, and need an unrelated donor. Individuals can register as potential donors at stem cell drives, where they provide consent and a tissue sample for human leukocyte antigen typing. The ideal donors are young, male, and from a diversity of ethnic backgrounds. However, in Canada, non-Caucasian males ages 17 to 35 years represent only 8...
September 24, 2017: Transfusion
https://www.readbyqxmd.com/read/28944322/advances-in-small-bowel-transplantation
#7
REVIEW
Alp Gürkan
Small bowel transplantation is a life-saving surgery for patients with intestinal failure. The biggest problem in intestinal transplantation is graft rejection. Graft rejection is the main reason for morbidity and mortality. Rejection has a negative effect on the survival of the graft. While 50%-75% of small bowel transplantation patients experience acute rejection, chronic rejection occurs in approximately 15% of patients. Immune monitoring is crucial after small bowel transplantation. Unlike other types of transplantation, there are no non-invasive or reliable markers to predict rejection in small bowel transplantation...
2017: Turk J Surg
https://www.readbyqxmd.com/read/28944059/biodegradable-porous-silk-microtubes-for-tissue-vascularization
#8
V E Bosio, J Brown, M J Rodriguez, David L Kaplan
Cardiovascular diseases are the leading cause of mortality around the globe, and microvasculature replacements to help stem these diseases are not available. Additionally, some vascular surgeries needing small diameter vascular grafts present different performance requirements. In this work silk fibroin scaffolds based on silk/polyethylene oxide blends were developed as microtubes for vasculature needs and for different tissue regeneration times, mechanical properties and structural designs. Systems with 13, 14 and 15% silk alone or blended with 1 or 2% of polyethylene oxide (PEO) were used to generate porous microtubes using gel-spinning...
2017: Journal of Materials Chemistry. B, Materials for Biology and Medicine
https://www.readbyqxmd.com/read/28943910/wound-fluids-affect-mir-21-mir-155-and-mir-221-expression-in-breast-cancer-cell-lines-and-this-effect-is-partially-abrogated-by-intraoperative-radiation-therapy-treatment
#9
Karolina Zaleska, Anna Przybyła, Katarzyna Kulcenty, Mateusz Wichtowski, Andrzej Mackiewicz, Wiktoria Suchorska, Dawid Murawa
Breast cancer is the most common malignant disease occurring in women. Conservative breast cancer surgery followed by radiation therapy is currently the standard treatment for this type of cancer. The majority of metastases occur within the scar, which initiated a series of studies. As a result, clinical trials aimed to assess whether localized radiotherapy, as intraoperative radiotherapy (IORT), may more effective in inhibiting the formation of local recurrence compared with the standard postoperative whole breast radiotherapy...
October 2017: Oncology Letters
https://www.readbyqxmd.com/read/28943295/the-slippery-slope-of-hematopoietic-stem-cell-aging
#10
Martin Wahlestedt, David Bryder
The late stages of life are in most species, including humans, associated with a decline in overall organism maintenance/health. This applies also to the hematopoietic system, where aging associates not only to an increased predisposition for hematological malignancies, but also as a strong comorbidity factor for other diseases. Research during the last two decades have proposed that alterations at the level of hematopoietic stem cells (HSCs) might be a root cause for the hematological changes observed with age...
September 21, 2017: Experimental Hematology
https://www.readbyqxmd.com/read/28943257/immuno-detection-of-cleaved-snap-25-from-differentiated-mouse-embryonic-stem-cells-provides-a-sensitive-assay-for-determination-of-botulinum-a-toxin-and-antitoxin-potency
#11
G Yadirgi, P Stickings, S Rajagopal, Y Liu, D Sesardic
Botulinum toxin type A is a causative agent of human botulism. Due to high toxicity and ease of production it is classified by the Centres for Disease Control and Prevention as a category A bioterrorism agent. The same serotype, BoNT/A, is also the most widely used in pharmaceutical preparations for treatment of a diverse range of neuromuscular disorders. Traditionally, animals are used to confirm the presence and activity of toxin and to establish neutralizing capabilities of countermeasures in toxin neutralization tests...
September 21, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28943254/sox7-is-required-for-muscle-satellite-cell-development-and-maintenance
#12
Rashida F Rajgara, Neena Lala-Tabbert, François Marchildon, Émilie Lamarche, Jennifer K MacDonald, Daryl A Scott, Alexandre Blais, Ilona S Skerjanc, Nadine Wiper-Bergeron
Satellite cells are skeletal-muscle-specific stem cells that are activated by injury to proliferate, differentiate, and fuse to enable repair. SOX7, a member of the SRY-related HMG-box family of transcription factors is expressed in quiescent satellite cells. To elucidate SOX7 function in skeletal muscle, we knocked down Sox7 expression in embryonic stem cells and primary myoblasts and generated a conditional knockout mouse in which Sox7 is excised in PAX3(+) cells. Loss of Sox7 in embryonic stem cells reduced Pax3 and Pax7 expression...
September 18, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28943250/in%C3%A2-vivo-generation-of-engraftable-murine-hematopoietic-stem-cells-by-gfi1b-c-fos-and-gata2-overexpression-within-teratoma
#13
Masao Tsukada, Yasunori Ota, Adam C Wilkinson, Hans J Becker, Motomi Osato, Hiromitsu Nakauchi, Satoshi Yamazaki
Generation of hematopoietic stem cells (HSCs) from pluripotent stem cells (PSCs) could potentially provide unlimited HSCs for clinical transplantation, a curative treatment for numerous blood diseases. However, to date, bona fide HSC generation has been largely unsuccessful in vitro. We have previously described proof of concept for in vivo HSC generation from PSCs via teratoma formation. However, our first-generation system was complex and the output low. Here, we further optimize this technology and demonstrate the following: (1) simplified HSC generation using transcription factor overexpression; (2) improved HSC output using c-Kit-deficient host mice, and (3) that teratomas can be transplanted and cryopreserved...
September 8, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28943029/generation-of-mouse-and-human-organoid-forming-intestinal-progenitor-cells-by-direct-lineage-reprogramming
#14
Shizuka Miura, Atsushi Suzuki
Intestinal organoids hold great promise as a valuable tool for studying and treating intestinal diseases. The currently available sources of human intestinal organoids, tissue fragments or pluripotent stem cells, involve invasive procedures or complex differentiation protocols, respectively. Here, we show that a set of four transcription factors, Hnf4α, Foxa3, Gata6, and Cdx2, can directly reprogram mouse fibroblasts to acquire the identity of fetal intestine-derived progenitor cells (FIPCs). These induced FIPCs (iFIPCs) form spherical organoids that develop into adult-type budding organoids containing cells with intestinal stem cell properties...
September 16, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28942499/human-cancer-stem-cells-are-a-target-for-cancer-prevention-using-epigallocatechin-gallate
#15
REVIEW
Hirota Fujiki, Eisaburo Sueoka, Anchalee Rawangkan, Masami Suganuma
PURPOSE: Our previous experiments show that the main constituent of green-tea catechins, (-)-epigallocatechin gallate (EGCG), completely prevents tumor promotion on mouse skin initiated with 7,12-dimethylbenz(a)anthracene followed by okadaic acid and that EGCG and green tea extract prevent cancer development in a wide range of target organs in rodents. Therefore, we focused our attention on human cancer stem cells (CSCs) as targets of cancer prevention and treatment with EGCG. METHODS: The numerous reports concerning anticancer activity of EGCG against human CSCs enriched from cancer cell lines were gathered from a search of PubMed, and we hope our review of the literatures will provide a broad selection for the effects of EGCG on various human CSCs...
September 23, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28942496/neovascularization-during-leafy-gall-formation-on-arabidopsis-thaliana-upon-rhodococcus-fascians-infection
#16
Alicja Dolzblasz, Alicja Banasiak, Danny Vereecke
Extensive de novo vascularization of leafy galls emerging upon Rhodococcus fascians infection is achieved by fascicular/interfascicular cambium activity and transdifferentiation of parenchyma cells correlated with increased auxin signaling. A leafy gall consisting of fully developed yet growth-inhibited shoots, induced by the actinomycete Rhodococcus fascians, differs in structure compared to the callus-like galls induced by other bacteria. To get insight into the vascular development accompanying the emergence of the leafy gall, the anatomy of infected axillary regions of the inflorescence stem of wild-type Arabidopsis thaliana accession Col-0 plants and the auxin response in pDR5:GUS-tagged plants were followed in time...
September 23, 2017: Planta
https://www.readbyqxmd.com/read/28942365/nf-%C3%AE%C2%BAb-participates-in-mouse-hair-cycle-control-and-plays-distinct-roles-in-the-various-pelage-hair-follicle-types
#17
Karsten Krieger, Sarah E Millar, Nadine Mikuda, Inge Krahn, Jennifer E Kloepper, Marta Bertolini, Claus Scheidereit, Ralf Paus, Ruth Schmidt-Ullrich
The transcription factor NF-κB controls key features of hair follicle (HF) development, but the role of NF-κB in adult HF cycle regulation remains obscure. Using NF-κB reporter mouse models, strong NF-κB activity was detected in the secondary hair germ (SHG) of late telogen and early anagen HFs, suggesting a potential role for NF-κB in HF stem/progenitor cell activation during anagen induction. At mid-anagen, NF-κB activity was observed in the inner root sheath (IRS) and unilaterally clustered in the HF matrix, which indicates that NF-κB activity is also involved in hair fiber morphogenesis during HF cycling...
September 20, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28942128/vascular-smooth-muscle-cells-derived-from-inbred-swine-induced-pluripotent-stem-cells-for-vascular-tissue-engineering
#18
Jiesi Luo, Lingfeng Qin, Mehmet H Kural, Jonas Schwan, Xia Li, Oscar Bartulos, Xiao-Qiang Cong, Yongming Ren, Liqiong Gui, Guangxin Li, Matthew W Ellis, Peining Li, Darrell N Kotton, Alan Dardik, Jordan S Pober, George Tellides, Marsha Rolle, Stuart Campbell, Robert J Hawley, David H Sachs, Laura E Niklason, Yibing Qyang
Development of autologous tissue-engineered vascular constructs using vascular smooth muscle cells (VSMCs) derived from human induced pluripotent stem cells (iPSCs) holds great potential in treating patients with vascular disease. However, preclinical, large animal iPSC-based cellular and tissue models are required to evaluate safety and efficacy prior to clinical application. Herein, swine iPSC (siPSC) lines were established by introducing doxycycline-inducible reprogramming factors into fetal fibroblasts from a line of inbred Massachusetts General Hospital miniature swine that accept tissue and organ transplants without immunosuppression within the line...
September 19, 2017: Biomaterials
https://www.readbyqxmd.com/read/28942039/comparative-effect-of-imatinib-and-ponatinib-on-autophagy-and-mirnome-in-chronic-myeloid-leukemia
#19
Cagla Kayabasi, Tugce Balci Okcanoglu, Besra Ozmen Yelken, Aycan Asik, Sunde Yilmaz Susluer, Cigir Biray Avci, Guray Saydam, Cumhur Gunduz
BCR-ABL tyrosine kinase inhibitors (TKIs) are selective therapies for the patients with Chronic Myeloid Leukemia (CML). Imatinib and ponatinib have remarkable long-term efficacy on a major molecular response. Although TKI related induction of cytotoxicity and apoptosis have been clearly investigated in molecular levels, their comparative effect on autophagy and miRNome are largely unknown. This study aimed to investigate the involvement of alterations of miRNA expressions in CML progression, and how imatinib and ponatinib affect this process, by comparing CML, imatinib-resistant CML and leukemia stem cells (LSC)...
September 20, 2017: Gene
https://www.readbyqxmd.com/read/28941992/nano-delivery-system-targeting-to-cancer-stem-cell-cluster-of-differentiation-biomarkers
#20
REVIEW
Ahad Mokhtarzadeh, Soodabeh Hassanpour, Zahra Farajzadeh Vahid, Maryam Hejazi, Maryam Hashemi, Javad Ranjbari, Maryam Tabarzad, Saeed Noorolyai, Miguel de la Guardia
Cancer stem cells (CSCs) are one of the most important origins of cancer progression and metastasis. CSCs have unique self-renewal properties and diverse cell membrane receptors that induced the resistance to the conventional chemotherapeutic agents. Therefore, the therapeutic removal of CSCs could result in the cancer cure with lack of recurrence and metastasis. In this regard, targeting CSCs in accordance to their specific biomarkers is a talented attitude in cancer therapy. Various CSCs surface biomarkers have been described, which some of them exhibited similarities on different cancer cell types, while the others are cancer specific and have just been reported on one or a few types of cancers...
September 20, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
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