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Zebrafish transplantation

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https://www.readbyqxmd.com/read/29420253/the-c-x-c-signalling-system-in-the-rodent-vs-primate-testis-impact-on-germ-cell-niche-interaction
#1
Laura Heckmann, Tim Pock, Ina Tröndle, Nina Neuhaus
In zebrafish, action of the chemokine Cxcl12 is mediated through its G-protein coupled seven-transmembrane domain receptor Cxcr4 and the atypical receptor Cxcr7. Employing this animal model it was revealed that this Cxcl12 signalling system plays a crucial role for directed migration of primordial germ cells (PGC) during early testicular development. Importantly, subsequent studies indicated that this regulatory mechanism is evolutionarily conserved also in mice. What is more, the functional role of the CXCL12 system does not seem to be limited to early phases of testicular development...
February 2, 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29296234/the-pyrazolyl-urea-gege3-inhibits-tumor-angiogenesis-and-reveals-dystrophia-myotonica-protein-kinase-dmpk-1-as-a-novel-angiogenesis-target
#2
Elda Meta, Beat A Imhof, Patricia Ropraz, Richard J Fish, Chiara Brullo, Olga Bruno, Adama Sidibé
The limitation of targeting VEGF/VEGFR2 signalling to stop angiogenesis in cancer therapy has been blamed on re-activation of alternative receptor tyrosine kinases by compensatory angiogenic factors. Targeting MAPK and PI3K signaling pathways in endothelial cells may be an alternative or complementary approach. Herein we aimed to evaluate the antitumor and antiangiogenic potential of a novel pyrazolyl-urea kinase inhibitor, GeGe3, and to identify its kinase targets. We found GeGe3 to inhibit the proliferation of HUVEC and endothelial tube formation...
December 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/29286381/development-of-an-in-vitro-assay-to-quantitate-hematopoietic-stem-and-progenitor-cells-hspcs-in-developing-zebrafish-embryos
#3
A C Berrun, D L Stachura
Hematopoiesis is an essential cellular process in which hematopoietic stem and progenitor cells (HSPCs) differentiate into the multitude of different cell lineages that comprise mature blood. Isolation and identification of these HSPCs is difficult because they are defined ex post facto; they can only be defined after their differentiation into specific cell lineages. Over the past few decades, the zebrafish (Danio rerio) has become a model organism to study hematopoiesis. Zebrafish embryos develop ex utero, and by 48 h post-fertilization (hpf) have generated definitive HSPCs...
November 30, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29225029/vagus-motor-neuron-topographic-map-determined-by-parallel-mechanisms-of-hox5-expression-and-time-of-axon-initiation
#4
Gabrielle R Barsh, Adam J Isabella, Cecilia B Moens
Many networks throughout the nervous system are organized into topographic maps, where the positions of neuron cell bodies in the projecting field correspond with the positions of their axons in the target field. Previous studies of topographic map development show evidence for spatial patterning mechanisms, in which molecular determinants expressed across the projecting and target fields are matched directly in a point-to-point mapping process. Here, we describe a novel temporal mechanism of topographic map formation that depends on spatially regulated differences in the timing of axon outgrowth and functions in parallel with spatial point-to-point mapping mechanisms...
December 1, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29199700/chemosuppressive-effect-of-plumbagin-on-human-non-small-lung-cancer-cell-xenotransplanted-zebrafish
#5
R Vinothkumar, S A Ceasar, A Divyarupa
BACKGROUND: Plumbagin (5-hydroxy-2-methyl-1,4-napthoquinone) derived from Plumbago species is a potential anti-tumour agent. Plumbagin has been tested for anti-cancer activity in vitro and in vivo using mice model. AIM: To study the tumour suppressing efficacy of plumbagin using zebrafish model. MATERIALS AND METHODS: Human Non-small lung cancer cell line were cultured in vitro and transplanted in to zebrafish. The development of tumour was confirmed by performing histology...
January 2017: Indian Journal of Cancer
https://www.readbyqxmd.com/read/29184141/development-and-growth-of-organs-in-living-whole-embryo-and-larval-grafts-in-zebrafish
#6
Toshihiro Kawasaki, Akiteru Maeno, Toshihiko Shiroishi, Noriyoshi Sakai
Age-related systemic environments influence neurogenesis and organ regeneration of heterochronic parabiotic partners; however, the difficulty of manipulating small embryos prevents the effects of aged systemic environments on primitive organs at the developmental stage from being analysed. Here, we describe a novel transplantation system to support whole living embryos/larvae as grafts in immunodeficient zebrafish by the intrusion of host blood vessels into the grafts, allowing bodies similar to those of heterochronic parabiosis to be generated by subcutaneous grafting...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29180571/zebrafish-nanog-is-primarily-required-in-extraembryonic-tissue
#7
James A Gagnon, Kamal Obbad, Alexander F Schier
The role of the zebrafish transcription factor Nanog has been controversial. It has been suggested that Nanog is primarily required for the proper formation of the extraembryonic yolk syncytial layer (YSL) and only indirectly regulates gene expression in embryonic cells. In an alternative scenario, Nanog has been proposed to directly regulate transcription in embryonic cells during zygotic genome activation. To clarify the roles of Nanog, we performed a detailed analysis of zebrafish nanog mutants. While zygotic nanog mutants survive to adulthood, maternal-zygotic and maternal mutants exhibit developmental arrest at the blastula stage...
November 27, 2017: Development
https://www.readbyqxmd.com/read/29142194/transient-cardiomyocyte-fusion-regulates-cardiac-development-in-zebrafish
#8
Suphansa Sawamiphak, Zacharias Kontarakis, Alessandro Filosa, Sven Reischauer, Didier Y R Stainier
Cells can sacrifice their individuality by fusing, but the prevalence and significance of this process are poorly understood. To approach these questions, here we generate transgenic reporter lines in zebrafish to label and specifically ablate fused cells. In addition to skeletal muscle cells, the reporters label cardiomyocytes starting at an early developmental stage. Genetic mosaics generated by cell transplantation show cardiomyocytes expressing both donor- and host-derived transgenes, confirming the occurrence of fusion in larval hearts...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29141689/patient-derived-xenograft-in-zebrafish-embryos-a-new-platform-for-translational-research-in-gastric-cancer
#9
Jia-Qi Wu, Jing Zhai, Chong-Yong Li, Ai-Min Tan, Ping Wei, Li-Zong Shen, Ming-Fang He
BACKGROUND: Gastric cancer (GC) is among the most commonly cancer occurred in Asian, especially in China. With its high heterogeneity and few of validated drug targets, GC remains to be one of the most under explored areas of precision medicine. In this study, we aimed to establish an in vivo patient-derived xenograft (PDX) model based on zebrafish (Danio rerio) embryos, allowing for a rapid analysis of the angiogenic and invasive potentials, as well as a fast drug sensitivity testing...
November 15, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29098121/using-zebrafish-to-model-liver-diseases-where-do-we-stand
#10
Duc-Hung Pham, Changwen Zhang, Chunyue Yin
Purpose of Review: The liver is the largest internal organ and performs both exocrine and endocrine function that is necessary for survival. Liver failure is among the leading causes of death and represents a major global health burden. Liver transplantation is the only effective treatment for end-stage liver diseases. Animal models advance our understanding of liver disease etiology and hold promise for the development of alternative therapies. Zebrafish has become an increasingly popular system for modeling liver diseases and complements the rodent models...
June 2017: Current Pathobiology Reports
https://www.readbyqxmd.com/read/29023202/transplantation-of-zebrafish-cells-by-conventional-pneumatic-microinjector
#11
Ming Shao, Xiao-Ning Cheng, Yuan-Yuan Liu, Ji-Tong Li, De-Li Shi
Generating chimeric zebrafish by transplantation is extremely useful for live imaging in developmental, stem cell, and cancer biology, and to answer the questions of how cells acquire, keep, and/or change their fate. However, as it is technically challenging, the use of transplantation approach remains very limited by the zebrafish community. In this study, we show that this cell grafting operation can be easily achieved by using a conventional pneumatic microinjector normally used for microinjections. Compared with previously published protocols, which need additional transplantation apparatus, this alternative transplantation method works well, but needs a simpler experimental setup, and is more accessible to all investigators...
October 12, 2017: Zebrafish
https://www.readbyqxmd.com/read/28968975/epigenetic-regulation-of-notch1-and-notch3-by-kmt2a-inhibits-glioma-proliferation
#12
Yin-Cheng Huang, Sheng-Jia Lin, Hung-Yu Shih, Chung-Han Chou, Hsiao-Han Chu, Ching-Chi Chiu, Chiou-Hwa Yuh, Tu-Hsueh Yeh, Yi-Chuan Cheng
Glioblastomas are among the most fatal brain tumors; however, the molecular determinants of their tumorigenic behavior are not adequately defined. In this study, we analyzed the role of KMT2A in the glioblastoma cell line U-87 MG. KMT2A knockdown promoted cell proliferation. Moreover, it increased the DNA methylation of NOTCH1 and NOTCH3 and reduced the expression of NOTCH1 and NOTCH3. NOTCH1 or NOTCH3 activation inhibited U-87 MG cell proliferation, whereas NOTCH1 and NOTCH3 inhibition by shRNAs induced cell proliferation, thus demonstrating the tumor-suppressive ability of NOTCH1 and NOTCH3 in U-87 MG cells...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28935977/zebrafish-in-vivo-screening-for-compounds-amplifying-hematopoietic-stem-and-progenitor-cells-preclinical-validation-in-human-cd34-stem-and-progenitor-cells
#13
Guruchandar Arulmozhivarman, Martin Kräter, Manja Wobus, Jens Friedrichs, Elham Pishali Bejestani, Katrin Müller, Katrin Lambert, Dimitra Alexopoulou, Andreas Dahl, Martin Stöter, Marc Bickle, Nona Shayegi, Jochen Hampe, Friedrich Stölzel, Michael Brand, Malte von Bonin, Martin Bornhäuser
The identification of small molecules that either increase the number and/or enhance the activity of human hematopoietic stem and progenitor cells (hHSPCs) during ex vivo expansion remains challenging. We used an unbiased in vivo chemical screen in a transgenic (c-myb:EGFP) zebrafish embryo model and identified histone deacetylase inhibitors (HDACIs), particularly valproic acid (VPA), as significant enhancers of the number of phenotypic HSPCs, both in vivo and during ex vivo expansion. The long-term functionality of these expanded hHSPCs was verified in a xenotransplantation model with NSG mice...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28835754/transit-amplifying-cells-in-the-fast-lane-from-stem-cells-towards-differentiation
#14
REVIEW
Emma Rangel-Huerta, Ernesto Maldonado
Stem cells have a high potential to impact regenerative medicine. However, stem cells in adult tissues often proliferate at very slow rates. During development, stem cells may change first to a pluripotent and highly proliferative state, known as transit-amplifying cells. Recent advances in the identification and isolation of these undifferentiated and fast-dividing cells could bring new alternatives for cell-based transplants. The skin epidermis has been the target of necessary research about transit-amplifying cells; this work has mainly been performed in mammalian cells, but further work is being pursued in other vertebrate models, such as zebrafish...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28830909/efforts-to-enhance-blood-stem-cell-engraftment-recent-insights-from-zebrafish-hematopoiesis
#15
REVIEW
Julie R Perlin, Anne L Robertson, Leonard I Zon
Hematopoietic stem cell transplantation (HSCT) is an important therapy for patients with a variety of hematological malignancies. HSCT would be greatly improved if patient-specific hematopoietic stem cells (HSCs) could be generated from induced pluripotent stem cells in vitro. There is an incomplete understanding of the genes and signals involved in HSC induction, migration, maintenance, and niche engraftment. Recent studies in zebrafish have revealed novel genes that are required for HSC induction and niche regulation of HSC homeostasis...
October 2, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28803829/the-vascular-niche-regulates-hematopoietic-stem-and-progenitor-cell-lodgment-and-expansion-via-klf6a-ccl25b
#16
Yuanyuan Xue, Junhua Lv, Chunxia Zhang, Lu Wang, Dongyuan Ma, Feng Liu
In mammals, hematopoietic stem and progenitor cells (HSPCs) rapidly expand in the fetal liver (FL), but the underlying mechanism remains unclear. Here, we characterize zebrafish caudal hematopoietic tissue (CHT) and identify an important cellular and molecular mechanism of HSPC expansion. Time-lapse imaging showed that HSPCs localize adjacent to vascular endothelial cells (ECs), and their migration and expansion display caudal vein-specific orientation in the CHT. RNA sequencing and functional analysis identified that an EC-expressed transcription factor, Krüppel-like factor 6a (Klf6a), is essential for the CHT niche...
August 21, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28731265/application-of-dead-end-knockout-zebrafish-as-recipients-of-germ-cell-transplantation
#17
Qian Li, Wataru Fujii, Kunihiko Naito, Goro Yoshizaki
Germ cell transplantation is a promising technology for the propagation of endangered or valuable fishes. In this technique, sterile male and female recipient fish are injected with donor germ cells so they can produce viable gametes derived from the donor cells. The dead end (dnd) gene is involved in the migration of primordial germ cells; therefore, dnd-knockout zebrafish are expected to be germ-cell-free, making them suitable recipients for germ cell transplantation. dnd mutants were produced by microinjecting 2 nl of 10 ng/μl cRNAs encoding zinc finger nucleases against dnd into the blastodisc of zebrafish embryos before the cell- cleavage stage...
October 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28729726/heart-regeneration-and-repair-after-myocardial-infarction-translational-opportunities-for-novel-therapeutics
#18
REVIEW
Thomas J Cahill, Robin P Choudhury, Paul R Riley
Current therapies for heart failure after myocardial infarction are limited and non-curative. Although regenerative approaches are receiving significant attention, clinical efforts that involve transplantation of presumed stem and progenitor cells have largely failed to deliver. Recent studies of endogenous heart regeneration in model organisms, such as zebrafish and neonatal mice, are yielding mechanistic insights into the roles of cardiomyocyte proliferation, resident stem cell niches, neovascularization, the immune system and the extracellular matrix...
October 2017: Nature Reviews. Drug Discovery
https://www.readbyqxmd.com/read/28715414/kinesin-1-promotes-chondrocyte-maintenance-during-skeletal-morphogenesis
#19
Adrian Santos-Ledo, Marina Garcia-Macia, Philip D Campbell, Marta Gronska, Florence L Marlow
During skeletal morphogenesis diverse mechanisms are used to support bone formation. This can be seen in the bones that require a cartilage template for their development. In mammals the cartilage template is removed, but in zebrafish the cartilage template persists and the bone mineralizes around the cartilage scaffold. Remodeling of unmineralized cartilage occurs via planar cell polarity (PCP) mediated cell rearrangements that contribute to lengthening of elements; however, the mechanisms that maintain the chondrocyte template that supports perichondral ossification remain unclear...
July 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28666270/epigenetic-regulation-of-notch1-and-notch3-by-kmt2a-inhibits-glioma-proliferation
#20
Yin-Cheng Huang, Sheng-Jia Lin, Hung-Yu Shih, Chung-Han Chou, Hsiao-Han Chu, Ching-Chi Chiu, Chiou-Hwa Yuh, Tu-Hsueh Yeh, Yi-Chuan Cheng
Glioblastomas are among the most fatal brain tumors; however, the molecular determinants of their tumorigenic behavior are not adequately defined. In this study, we analyzed the role of KMT2A in the glioblastoma cell line U-87 MG. KMT2A knockdown promoted cell proliferation. Moreover, it increased the DNA methylation of NOTCH1 and NOTCH3 and reduced the expression of NOTCH1 and NOTCH3. NOTCH1 or NOTCH3 activation inhibited U-87 MG cell proliferation, whereas NOTCH1 and NOTCH3 inhibition by shRNAs induced cell proliferation, thus demonstrating the tumor-suppressive ability of NOTCH1 and NOTCH3 in U-87 MG cells...
June 27, 2017: Oncotarget
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