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https://www.readbyqxmd.com/read/28643254/gene-targeting-in-rabbits-single-step-generation-of-knock-out-rabbits-by-microinjection-of-crispr-cas9-plasmids
#1
Yoshihiro Kawano, Arata Honda
The development of genome editing technology has allowed gene disruptions to be achieved in various animal species and has been beneficial to many mammals. Gene disruption using pluripotent stem cells is difficult to achieve in rabbits, but thanks to advances in genome editing technology, a number of gene disruptions have been conducted. This paper describes a simple and easy method for carrying out gene disruptions in rabbits using CRISPR/Cas9 in which the gene to be disrupted is marked, the presence or absence of off-target candidates is checked, and a plasmid allowing simultaneous expression of Cas9 and sgRNA is constructed...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28641661/-clinical-and-pathologic-features-of-myeloid-sarcoma
#2
Ya-Jun Jiang, Hong-Xia Wang, Wan-Chuan Zhuang, Hao Chen, Chang Zhang, Xiu-Mei Li, Gui-Hua Zhu, Yao He
OBJECTIVE: To explore the clinicopathologic features, differential diagnosis and therapy of myeloid sarcoma. METHODS: The clinical data including clinical manifestations, laboratorial tests, histopathologicical examination, immunohistochemistry and clinical prognosis of 10 patients with myeloid sarcoma were analyzed retrospectively. Among 10 patients, 5 male and 5 female, aged 23 to 71 years old (median = 36 years). RESULTS: 2 cases of myeloid sarcoma were secondary from chronic myeloid leukemia, and 1 cases of myeloid sarcoma occurred after the allogeneic hematopoietic stem cell transplantation due to acute myeloid leukemia, and the others lacked the anamnesis of malignancies...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28637969/development-of-a-patient-derived-induced-pluripotent-stem-cell-model-for-the-investigation-of-scn5a-d1275n-related-cardiac-sodium-channelopathy
#3
Mamoru Hayano, Takeru Makiyama, Tsukasa Kamakura, Hiroshi Watanabe, Kenichi Sasaki, Shunsuke Funakoshi, Yimin Wuriyanghai, Suguru Nishiuchi, Takeshi Harita, Yuta Yamamoto, Hirohiko Kohjitani, Sayako Hirose, Fumika Yokoi, Jiarong Chen, Osamu Baba, Takahiro Horie, Kazuhisa Chonabayashi, Seiko Ohno, Futoshi Toyoda, Yoshinori Yoshida, Koh Ono, Minoru Horie, Takeshi Kimura
BACKGROUND: TheSCN5Agene encodes the α subunit of the cardiac voltage-gated sodium channel, NaV1.5. The missense mutation, D1275N, has been associated with a range of unusual phenotypes associated with reduced NaV1.5 function, including cardiac conduction disease and dilated cardiomyopathy. Curiously, the reported biophysical properties ofSCN5A-D1275N channels vary with experimental system.Methods and Results:First, using a human embryonic kidney (HEK) 293 cell-based heterologous expression system, theSCN5A-D1275N channels showed similar maximum sodium conductance but a significantly depolarizing shift of activation gate (+10 mV) compared to wild type...
June 20, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28634297/superman-prevents-class-b-gene-expression-and-promotes-stem-cell-termination-in-the-fourth-whorl-of-arabidopsisthaliana-flowers
#4
Nathanaël Prunet, Weibing Yang, Pradeep Das, Elliot M Meyerowitz, Thomas P Jack
The molecular and genetic networks underlying the determination of floral organ identity are well studied, but much less is known about how the flower is partitioned into four developmentally distinct whorls. The SUPERMAN gene is required for proper specification of the boundary between stamens in whorl 3 and carpels in whorl 4, as superman mutants exhibit supernumerary stamens but usually lack carpels. However, it has remained unclear whether extra stamens in superman mutants originate from an organ identity change in whorl 4 or the overproliferation of whorl 3...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28634006/testosterone-differentially-affects-t-cells-and-neurons-in-murine-and-human-models-of-neuroinflammation-and-neurodegeneration
#5
Megan G Massa, Christina David, Stefanie Jörg, Johannes Berg, Barbara Gisevius, Sarah Hirschberg, Ralf A Linker, Ralf Gold, Aiden Haghikia
The high female-to-male sex ratio of multiple sclerosis (MS) prevalence has continuously confounded researchers, especially in light of male patients' accelerated disease course at later stages of MS. Although multiple studies have concentrated on estrogenic mechanisms of disease modulation, fairly little attention has been paid to androgenic effects in a female system, and even fewer studies have attempted to dissociate hormonal effects on the neurodegenerative and neuroinflammatory processes of MS. Herein, we demonstrate the differential effects of hormone treatment on the acute inflammatory and chronic neurodegenerative phases of murine experimental autoimmune encephalomyelitis...
July 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28631993/ovarian-ecdysteroid-biosynthesis-and-female-germline-stem-cells
#6
Tomotsune Ameku, Yuto Yoshinari, Ruriko Fukuda, Ryusuke Niwa
The germline stem cells (GSCs) are critical for gametogenesis throughout the adult life. Stem cell identity is maintained by local signals from a specialized microenvironment called the niche. However, it is unclear how systemic signals regulate stem cell activity in response to environmental cues. In our previous article, we reported that mating stimulates GSC proliferation in female Drosophila. The mating-induced GSC proliferation is mediated by ovarian ecdysteroids, whose biosynthesis is positively controlled by Sex peptide signaling...
February 8, 2017: Fly
https://www.readbyqxmd.com/read/28631269/missing-hla-c-group-1-ligand-in-patients-with-aml-and-mds-is-associated-with-reduced-risk-of-relapse-and-better-survival-after-allogeneic-stem-cell-transplantation-with-fludarabine-and-treosulfan-reduced-toxicity-conditioning
#7
Avichai Shimoni, Luca Vago, Massimo Bernardi, Ronit Yerushalmi, Jacopo Peccatori, Raffaella Greco, Noga Shem-Tov, Alessandro Lo Russo, Ivetta Danylesko, Arie Apel, Chiara Bonini, Maria Teresa Lupo Stanghellini, Arnon Nagler, Fabio Ciceri
Reduced-toxicity conditioning with fludarabine and treosulfan is a dose-intensive regimen with enhanced anti-leukemia effect and acceptable toxicity in AML/MDS. HLA-C regulates natural-killer (NK) cell function by inhibiting Killer immunoglobulin-like receptors (KIR) and is divided into C1 and C2 epitopes. The missing-ligand theory suggests that missing recipient KIR ligands drives NK-alloreactivity after SCT, in the absence of HLA-mismatch by activating unlicensed donor NK cells. We analyzed SCT outcomes in 203 patients with AML/MDS, median age 58 years, given SCT from matched-siblings (n=97) or matched-unrelated donors (n=106), using two treosulfan doses (total 36 or 42 gr/m2)...
June 19, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28629234/healing-of-osteochondral-defects-via-endochondral-ossification-in-an-ovine-model
#8
Helen Lydon, Alan Getgood, Frances M D Henson
OBJECTIVE: The objective of this study was to describe the mechanism of healing of osteochondral defects of the distal femur in the sheep, a commonly used translational model. Information on the healing mechanism be useful to inform the design of tissue engineering devices for joint surface defect repair. DESIGN: A retrospective study was conducted examining 7-mm diameter osteochondral defects made in the distal medial femoral condyle of 40 adult female sheep, comprising control animals from 3 separate structures...
June 1, 2017: Cartilage
https://www.readbyqxmd.com/read/28626025/intranasal-administration-of-mesenchymoangioblast-derived-mesenchymal-stem-cells-abrogates-airway-fibrosis-and-airway-hyperresponsiveness-associated-with-chronic-allergic-airways-disease
#9
Simon G Royce, Siddharth Rele, Brad R S Broughton, Kilian Kelly, Chrishan S Samuel
Structural changes known as airway remodeling (AWR) characterize chronic/severe asthma and contribute to lung dysfunction. Thus, we assessed the in vivo efficacy of induced pluripotent stem cell and mesenchymoangioblast-derived mesenchymal stem cells (MCA-MSCs) on AWR in a murine model of chronic allergic airways disease (AAD)/asthma. Female Balb/c mice were subjected to a 9-wk model of ovalbumin (OVA)-induced chronic AAD and treated intravenously or intranasally with MCA-MSCs from weeks 9 to11. Changes in airway inflammation (AI), AWR, and airway hyperresponsiveness (AHR) were assessed...
June 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28620294/gestational-exposure-to-air-pollution-alters-cortical-volume-microglial-morphology-and-microglia-neuron-interactions-in-a-sex-specific-manner
#10
Jessica L Bolton, Steven Marinero, Tania Hassanzadeh, Divya Natesan, Dominic Le, Christine Belliveau, S N Mason, Richard L Auten, Staci D Bilbo
Microglia are the resident immune cells of the brain, important for normal neural development in addition to host defense in response to inflammatory stimuli. Air pollution is one of the most pervasive and harmful environmental toxicants in the modern world, and several large scale epidemiological studies have recently linked prenatal air pollution exposure with an increased risk of neurodevelopmental disorders such as autism spectrum disorder (ASD). Diesel exhaust particles (DEP) are a primary toxic component of air pollution, and markedly activate microglia in vitro and in vivo in adult rodents...
2017: Frontiers in Synaptic Neuroscience
https://www.readbyqxmd.com/read/28614775/changes-in-viability-of-rat-adipose-derived-stem-cells-isolated-from-abdominal-perinuclear-adipose-tissue-stimulated-with-pulsed-electromagnetic-field
#11
A Baranowska, B Skowron, B Nowak, K Ciesielczyk, P Guzdek, K Gil, J Kaszuba-Zwoinska
Previous experiments demonstrated that low-frequency electromagnetic field (LF-EMF) may activate cellular death pathways in proliferating cells. Therefore, we hypothesized that LF-EMF may also influence viability of highly proliferating undifferentiated adipose-derived stem cells. Obesity is classified as a civilization disease; its etiopathogenesis is presumed to include both genetic predisposition and influence of modified environmental factors, such as unbalanced diet with excess calories and/or too low physical activity...
April 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28605059/amniotic-fluid-stem-cells-ameliorate-bladder-dysfunction-induced-by-chronic-bladder-ischemia-in-rat
#12
Ching-Chung Liang, Sheng-Wen Steven Shaw, Yi-Hao Lin, Tsong-Hai Lee
AIMS: This study investigated the protective effect of human amniotic fluid-derived stem cells (hAFSCs) against bladder overactivity in rat model of atherosclerosis-induced chronic bladder ischemia. METHODS: Adult female Sprague-Dawley rats were divided into six groups: (1) Normal control with a regular diet for 8 weeks, (2) Sham-operation, (3) arterial balloon endothelial injury (AEI) of common iliac artery (AEI only), and post-AEI consecutive hAFSCs treatment for (4) 1 day, (5) 3 days, and (6) 7 days...
June 12, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28600811/inducible-knockdown-of-pregnancy-associated-plasma-protein-a-gene-expression-in-adult-female-mice-extends-life-span
#13
Laurie K Bale, Sally A West, Cheryl A Conover
Pregnancy-associated plasma protein-A (PAPP-A) knockout (KO) mice, generated through homologous recombination in embryonic stem cells, have a significantly increased lifespan compared to wild-type littermates. However, it is unknown whether this longevity advantage would pertain to PAPP-A gene deletion in adult animals. In the present study, we used tamoxifen (Tam)-inducible Cre recombinase-mediated excision of the floxed PAPP-A (fPAPP-A) gene in mice at 5 months of age. fPAPP-A mice, which were either positive (pos) or negative (neg) for Tam-Cre, received Tam treatment with quarterly boosters...
June 9, 2017: Aging Cell
https://www.readbyqxmd.com/read/28589551/centre-characteristics-and-procedure-related-factors-have-an-impact-on-outcomes-of-allogeneic-transplantation-for-patients-with-cll-a-retrospective-analysis-from-the-european-society-for-blood-and-marrow-transplantation-ebmt
#14
Johannes Schetelig, Liesbeth C de Wreede, Niels S Andersen, Carol Moreno, Michel van Gelder, Antonin Vitek, Michal Karas, Mauricette Michallet, Maciej Machaczka, Martin Gramatzki, Dietrich Beelen, Jürgen Finke, Julio Delgado, Liisa Volin, Jakob Passweg, Peter Dreger, Nicolaas Schaap, Eva Wagner, Anja Henseler, Anja van Biezen, Martin Bornhäuser, Simona Iacobelli, Hein Putter, Stefan O Schönland, Nicolaus Kröger
The best approach for allogeneic haematopoietic stem cell transplantations (alloHCT) in patients with chronic lymphocytic leukaemia (CLL) is unknown. We therefore analysed the impact of procedure- and centre-related factors on 5-year event-free survival (EFS) in a large retrospective study. Data of 684 CLL patients who received a first alloHCT between 2000 and 2011 were analysed by multivariable Cox proportional hazards models with a frailty component to investigate unexplained centre heterogeneity. Five-year EFS of the whole cohort was 37% (95% confidence interval [CI], 34-42%)...
June 7, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28588718/renal-cell-carcinoma-with-synchronous-ipsilateral-urothelial-carcinoma-of-the-renal-pelvis
#15
Qun Lu, Junlong Zhuang, Hongqian Guo
The simultaneous occurrence of renal cell carcinoma (RCC) and urothelial carcinoma (UC) in the same kidney is extraordinarily rare, and is also known as multiple primary malignant tumors. The present study reports the case of a 76-year-old female with synchronous ipsilateral RCC and UC of the renal pelvis, who underwent operation, chemotherapy and reoperation when recurrence of RCC or UC was identified. Cluster of differentiation 44 (CD44) is one of the promising markers for identifying cancer stem cells in various solid tumors, along with aldehyde dehydrogenase 1 A1 (ALDH1A1)...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28587361/biocompatibility-of-polypropylene-mesh-scaffold-with-adipose-derived-stem-cells
#16
Hui Cheng, Yanling Zhang, Bei Zhang, Jie Cheng, Weiqi Wang, Xin Tang, Peng Teng, Yanyu Li
In this study, we investigated the rejection of the synthetic patch and human tissues in the host. We observed the growth of adipose-derived stem cells (ADSCs) cultured with polypropylene mesh in vitro. The results of flow cytometry showed that the expression of CD44, CD73, CD90, CD45, CD14 and CD34 was 98.54, 95.32, 98.49, 1.21, 3.01 and 2.14%, respectively. ADSCs were isolated from rabbit subcutaneous adipose tissue after collagenase digestion, filtration and centrifugation. The ADSCs of passage 3 were seeded onto the polypropylene mesh scaffolds...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28587347/effect-of-mesenchymal-stem-cells-on-sj%C3%A3-gren-like-mice-and-the-microrna-expression-profiles-of-splenic-cd4-t-cells
#17
Guang-Feng Ruan, Ling Zheng, Jia-Shu Huang, Wan-Xue Huang, Bang-Dong Gong, Xing-Xing Fang, Xiao-Yu Zhang, Jian-Ping Tang
Mesenchymal stem cells (MSCs) serve immuno-regulatory functions and offer a promising novel treatment for certain autoimmune diseases. The present study investigated the therapeutic effect of mice bone marrow (BM)-MSCs on mice with relatively late stage of Sjögren-like disease and the impact of BM-MSCs on the microRNA (miRNA) expression profiles of splenic CD4+ T cells. Female NOD/Ltj mice were randomized into two groups: The disease group (n=8) and the MSC-treated group (n=8). Female ICR mice served as the healthy control group (n=8)...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28586020/altered-expression-of-epithelial-mesenchymal-transition-and-pluripotent-associated-markers-by-sex-steroid-hormones-in-human-embryonic-stem-cells
#18
So-Ye Jeon, Kyung-A Hwang, Cho-Won Kim, Eui-Bae Jeung, Kyung-Chul Choi
Embryonic stem (ES) cells are pluripotent stem cells derived from a developmental stage of pre‑implanted embryos. The present study investigated the effect of female sex steroid hormones on the characteristics of human ES cells by using a feeder‑free culture protocol. In a feeder‑free condition without sex hormones, human ES cells assumed the form of tightly packed cells that grow in a monolayer. The cells had clean and defined edges with no evidence of differentiation and expressed several markers specific for undifferentiated ES cells including POU class 5 homeobox 1 (POU5F1), sex determining region Y‑box 2 (SOX2) and NANOG homeobox (NANOG)...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28582519/x-chromosome-inactivation-in-human-pluripotent-stem-cells-as-a-model-for-human-development-back-to-the-drawing-board
#19
Mieke Geens, Susana M Chuva De Sousa Lopes
BACKGROUND: Human pluripotent stem cells (hPSC), both embryonic and induced (hESC and hiPSC), are regarded as a valuable in vitro model for early human development. In order to fulfil this promise, it is important that these cells mimic as closely as possible the in vivo molecular events, both at the genetic and epigenetic level. One of the most important epigenetic events during early human development is X chromosome inactivation (XCI), the transcriptional silencing of one of the two X chromosomes in female cells...
June 5, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/28576772/incompatibility-between-mitochondrial-and-nuclear-genomes-during-oogenesis-results-in-ovarian-failure-and-embryonic-lethality
#20
Chunyang Zhang, Kristi L Montooth, Brian R Calvi
Mitochondrial dysfunction can cause female infertility. An important remaining question is the extent to which incompatibility between mitochondrial and nuclear genomes contributes to female infertility. It was previously shown that a mitochondrial haplotype from D. simulans (simw(501) ) is incompatible with a nuclear genome from the D. melanogaster strain Oregon-R (OreR), resulting in impaired development, which was enhanced at higher temperature. This mito-nuclear incompatibility is between alleles of the nuclear-encoded mitochondrial tyrosyl- tRNA synthetase (Aatm) and the mitochondrial-encoded tyrosyl-tRNA that it aminoacylates...
June 2, 2017: Development
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