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https://www.readbyqxmd.com/read/28239955/the-novel-hla-drb1-15-140-allele-discovered-in-a-taiwanese-unrelated-hematopoietic-stem-cell-donor
#1
K L Yang, J Ng, A Lazaro, P Y Lin
One nucleotide substitution at residue 91 of HLA-DRB1*15:02:01:01 results in a new allele, HLA-DRB1*15:140.
February 26, 2017: HLA
https://www.readbyqxmd.com/read/28239777/-limbal-epithelial-stem-cell-transplantation-current-state-and-perspectives
#2
D Meller, H Thomasen
Homeostasis of the corneal surface is maintained by epithelial stem cells localized in the limbus. Multiple intrinsic factors or external injuries can destroy the delicate microenvironment of limbal epithelial stem cells causing a state which is termed limbal stem cell deficiency (LSCD). In such cases, re-epithelialization of the cornea is drastically impeded and conjunctival epithelium starts to extend beyond the limbus and to invade the corneal surface. In partial LSCD, a superficial keratectomy combined with an amniotic membrane is advised and helpful to restore an intact, healthy ocular surface...
February 26, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28239758/acellular-mouse-kidney-ecm-can-be-used-as-a-three-dimensional-substrate-to-test-the-differentiation-potential-of-embryonic-stem-cell-derived-renal-progenitors
#3
Manpreet Sambi, Theresa Chow, Jennifer Whiteley, Mira Li, Shawn Chua, Vanessa Raileanu, Ian M Rogers
The development of strategies for tissue regeneration and bio-artificial organ development is based on our understanding of embryogenesis. Differentiation protocols attempt to recapitulate the signaling modalities of gastrulation and organogenesis, coupled with cell selection regimens to isolate the cells of choice. This strategy is impeded by the lack of optimal in vitro culture systems since traditional culture systems do not allow for the three-dimensional interaction between cells and the extracellular matrix...
February 27, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28239754/neprilysin-facilitates-adipogenesis-through-potentiation-of-the-phosphatidylinositol-3-kinase-pi3k-signaling-pathway
#4
Juwan Kim, Dasol Han, Sung-Hyun Byun, Mookwang Kwon, Sun-Jung Cho, Young Ho Koh, Keejung Yoon
Neprilysin (NEP) is a zinc metallopeptidase that cleaves a number of small peptides into inactive forms. Despite the recent evidence of a significant correlation between the levels of NEP in plasma and the severity of obesity in humans, a cause-and-effect relationship or a functional role of NEP in obesity has remained uncertain. In this study, we show that NEP has a positive regulatory effect on fat cell formation from precursor cells. NEP increases the accumulation of cytoplasmic triglycerides in 3T3-L1 preadipocytes or the C3H10T1/2 mesenchymal stem cell line in differentiation conditions...
February 27, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28239658/loss-of-immune-homeostasis-dictates-shiv-rebound-after-stem-cell-transplantation
#5
Christopher W Peterson, Clarisse Benne, Patricia Polacino, Jasbir Kaur, Cristina E McAllister, Abdelali Filali-Mouhim, Willi Obenza, Tiffany A Pecor, Meei-Li Huang, Audrey Baldessari, Robert D Murnane, Ann E Woolfrey, Keith R Jerome, Shiu-Lok Hu, Nichole R Klatt, Stephen DeRosa, Rafick P Sékaly, Hans-Peter Kiem
The conditioning regimen used as part of the Berlin patient's hematopoietic cell transplant likely contributed to his eradication of HIV infection. We studied the impact of conditioning in simian-human immunodeficiency virus-infected (SHIV-infected) macaques suppressed by combination antiretroviral therapy (cART). The conditioning regimen resulted in a dramatic, but incomplete depletion of CD4(+) and CD8(+) T cells and CD20(+) B cells, increased T cell activation and exhaustion, and a significant loss of SHIV-specific Abs...
February 23, 2017: JCI Insight
https://www.readbyqxmd.com/read/28239599/iran-diabetes-research-roadmap-idrr-study-a-preliminary-study-on-diabetes-research-in-the-world-and-iran
#6
Ensieh Nasli-Esfahani, Farshad Farzadfar, Marjan Kouhnavard, Robabeh Ghodssi-Ghassemabadi, Alireza Khajavi, Maryam Peimani, Rezvan Razmandeh, Mahboobeh Vala, Gita Shafiee, Camelia Rambod, Mahnaz Sanjari, Maryam Aalaa, Maryam Ghodsi, Farideh Razi, Fatemeh Bandarian, Bagher Larijani
BACKGROUNDS: Diabetes is one of the most common metabolic disorders worldwide. This study aim was to provide detail analysis of diabetes research output and its trend in Iran as well as in the world and compare them. METHODS: Data was retrieved from PubMed database using a suitable search strategy and application of proper operator "AND", "OR" and "NOT". All English documents published from 2008 to 2012 were included. Meeting abstract, letter to the editor, guidelines, consensus and reviews were excluded...
2017: Journal of Diabetes and Metabolic Disorders
https://www.readbyqxmd.com/read/28239564/cancer-stem-cells-and-early-stage-basal-like-breast-cancer
#7
Pang-Kuo Lo, Benjamin Wolfson, Qun Zhou
Ductal carcinoma in situ (DCIS) is a category of early stage, non-invasive breast tumor defined by the intraductal proliferation of malignant breast epithelial cells. DCIS is a heterogeneous disease composed of multiple molecular subtypes including luminal, HER2 and basal-like types, which are characterized by immunohistochemical analyses and gene expression profiling. Following surgical and radiation therapies, patients with luminal-type, estrogen receptor-positive DCIS breast tumors can benefit from adjuvant endocrine-based treatment...
May 10, 2016: World Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28239465/pd-1-blockade-induces-remissions-in-relapsed-classical-hodgkin-lymphoma-following-allogeneic-hematopoietic-stem-cell-transplantation
#8
James Godfrey, Michael R Bishop, Sahr Syed, Elizabeth Hyjek, Justin Kline
BACKGROUND: Allogeneic hematopoietic stem cell transplantation and checkpoint blockade therapy are immune-based therapies that have activity in selected refractory hematologic malignancies. Interest has developed in combining these treatments for high-risk hematologic diseases. However, there is concern that checkpoint blockade could augment graft-versus-host disease, and very few studies have evaluated the safety of checkpoint blockade in the post-allogeneic setting. Here, we report the outcomes of three patients with relapsed classical Hodgkin's lymphoma following allogeneic transplant that were treated with the anti-PD-1 antibody, nivolumab...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28239380/development-of-three-different-nk-cell-subpopulations-during-immune-reconstitution-after-pediatric-allogeneic-hematopoietic-stem-cell-transplantation-prognostic-markers-in-gvhd-and-viral-infections
#9
Sabine Huenecke, Claudia Cappel, Ruth Esser, Verena Pfirrmann, Emilia Salzmann-Manrique, Sibille Betz, Eileen Keitl, Julia Banisharif-Dehkordi, Shahrzad Bakhtiar, Christoph Königs, Andrea Jarisch, Jan Soerensen, Evelyn Ullrich, Thomas Klingebiel, Peter Bader, Melanie Bremm
Natural killer (NK) cells play an important role following allogeneic hematopoietic stem cell transplantation (HSCT) exerting graft-versus-leukemia/tumor effect and mediating pathogen-specific immunity. Although NK cells are the first donor-derived lymphocytes reconstituting post-HSCT, their distribution of CD56(++)CD16(-) (CD56(bright)), CD56(++)CD16(+) (CD56(intermediate=int)), and CD56(+)CD16(++) (CD56(dim)) NK cells is explicitly divergent from healthy adults, but to some extent comparable to the NK cell development in early childhood...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28239298/mir-335-negatively-regulates-osteosarcoma-stem-cell-like-properties-by-targeting-pou5f1
#10
Xiaodong Guo, Ling Yu, Zhengpei Zhang, Guo Dai, Tian Gao, Weichun Guo
BACKGROUND: Evidence is accumulating to link cancer stem cells to the pathogenesis and progression of osteosarcoma. The aim of this study is to investigate the role of miR-335 in osteosarcoma stem cells. METHODS: Tumor spheroid culture and flow cytometry were applied to screen out osteosarcoma stem cells. Real-time quantitative PCR was used to detect the expression level of miR-335 in MG63, U2OS and 143B osteosarcoma stem cells. The relationship of miR-335 expression with osteosarcoma stem cells was then analyzed...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28239080/the-therapeutic-efficacy-of-tonsil-derived-mesenchymal-stem-cells-in-dextran-sulfate-sodium-induced-acute-murine-colitis-model
#11
Eun Mi Song, Sung Ae Jung, Ko Eun Lee, Ji Young Jang, Kang Hoon Lee, Chung Hyun Tae, Chang Mo Moon, Yang Hee Joo, Seong Eun Kim, Hye Kyung Jung, Ki Nam Shim
Background/Aims: Mesenchymal stem cells (MSCs) are multipotent progenitor cells currently under investigation for its efficacy as the treatment for inflammatory bowel disease. In this study, we evaluated the efficacy of tonsil-derived mesenchymal stem cells (T-MSCs) as a novel source of mesenchymal stem cells and traced their localization in a murine model of acute colitis induced by dextran sulfate sodium (DSS). Methods: C57BL/6 mice were randomly assigned to the following three groups: the normal control group, DSS colitis group (DSS+phosphate buffered saline), and T-MSC group (DSS+T-MSCs, 1×10(6))...
February 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28238948/mechanisms-of-embryonic-stomach-development
#12
REVIEW
Kyle W McCracken, James M Wells
The stomach is a digestive organ that has important roles in human physiology and pathophysiology. The developmental origin of the stomach is the embryonic foregut, which also gives rise a number of other structures. There are several signaling pathways and transcription factors that are known to regulate stomach development at different stages, including foregut patterning, stomach specification, and gastric regionalization. These developmental events have important implications in later homeostasis and disease in the adult stomach...
February 23, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28238828/dilodendron-bipinnatum-radlk-inhibits-pro-inflammatory-mediators-through-the-induction-of-mkp-1-and-the-down-regulation-of-mapkp38-jnk-nf-%C3%AE%C2%BAb-pathways-and-cox-2-in-lps-activated-raw-264-7-cells
#13
Ruberlei Godinho de Oliveira, Geovane Roberto de Campos Castilho, André Luiz da Cunha, Fábio Miyajima, Domingos Tabajara de Oliveira Martins
ETHNOPHARMACOLOGICAL RELEVANCE: The stem bark of Dilodendron bipinnatum Radlk. (Sapindaceae), a tree native to Pantanal of Mato Grosso, Brazil, popularly known as "mulher-pobre" (poor woman), has been historically used by the locals, after decoction and maceration, for the treatment of inflammatory conditions. We have recently shown that these preparations indeed possess anti-inflammatory properties, which are mediated by the inhibition of cell migration and the modulation of Th1 and Th2 cytokines...
February 23, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28238813/genomewide-bisulfite-sequencing-reveals-the-origin-and-time-dependent-fragmentation-of-urinary-cfdna
#14
Timothy H T Cheng, Peiyong Jiang, Jacqueline C W Tam, Xiao Sun, Wing-Shan Lee, Stephanie C Y Yu, Jeremy Y C Teoh, Peter K F Chiu, Chi-Fai Ng, Kai-Ming Chow, Cheuk-Chun Szeto, K C Allen Chan, Rossa W K Chiu, Y M Dennis Lo
Urinary cell-free (cf) DNA holds great potential as a completely noninvasive form of liquid biopsy. Knowledge of the composition of cfDNA by tissue of origin is useful for guiding its clinical uses. We conducted a global survey of urinary cfDNA composition using genomewide bisulfite sequencing. While previous studies focused on detecting cfDNA from a single source at a time, genomewide tissue specific methylation signatures allow us to simultaneously deduce the proportional contribution from each contributing tissue...
February 23, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28238799/inhibition-of-drp1-hyper-activation-is-protective-in-animal-models-of-experimental-multiple-sclerosis
#15
Fucheng Luo, Karl Herrup, Xin Qi, Yan Yang
Multiple Sclerosis (MS), a leading neurological disorder of young adults, is characterized by the loss of oligodendrocytes (OLs), demyelination, inflammation and neuronal degeneration. Here we show that dynamin-related protein 1 (Drp1), a mitochondrial fission protein, is activated in primary OL cells exposed to TNF-α induced inflammation or oxidative stress, as well as in EAE-immunized and cuprizone toxicity-induced demyelinating mouse models. Inhibition of Drp1 hyper-activation by the selective inhibitor P110 abolishes Drp1 translocation to the mitochondria, reduces mitochondrial fragmentation and stems necrosis in primary OLs exposed to TNF-α and H2O2...
February 23, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28238797/in%C3%A2-vitro-modeling-of-blood-brain-barrier-with-human-ipsc-derived-endothelial-cells-pericytes-neurons-and-astrocytes-via-notch-signaling
#16
Kohei Yamamizu, Mio Iwasaki, Hitomi Takakubo, Takumi Sakamoto, Takeshi Ikuno, Mami Miyoshi, Takayuki Kondo, Yoichi Nakao, Masato Nakagawa, Haruhisa Inoue, Jun K Yamashita
The blood-brain barrier (BBB) is composed of four cell populations, brain endothelial cells (BECs), pericytes, neurons, and astrocytes. Its role is to precisely regulate the microenvironment of the brain through selective substance crossing. Here we generated an in vitro model of the BBB by differentiating human induced pluripotent stem cells (hiPSCs) into all four populations. When the four hiPSC-derived populations were co-cultured, endothelial cells (ECs) were endowed with features consistent with BECs, including a high expression of nutrient transporters (CAT3, MFSD2A) and efflux transporters (ABCA1, BCRP, PGP, MRP5), and strong barrier function based on tight junctions...
February 20, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28238796/ephrin-b1-mosaicism-drives-cell-segregation-in-craniofrontonasal-syndrome-hipsc-derived-neuroepithelial-cells
#17
Terren K Niethamer, Andrew R Larson, Audrey K O'Neill, Marina Bershteyn, Edward C Hsiao, Ophir D Klein, Jason H Pomerantz, Jeffrey O Bush
Although human induced pluripotent stem cells (hiPSCs) hold great potential for the study of human diseases affecting disparate cell types, they have been underutilized in seeking mechanistic insights into the pathogenesis of congenital craniofacial disorders. Craniofrontonasal syndrome (CFNS) is a rare X-linked disorder caused by mutations in EFNB1 and characterized by craniofacial, skeletal, and neurological anomalies. Heterozygous females are more severely affected than hemizygous males, a phenomenon termed cellular interference that involves mosaicism for EPHRIN-B1 function...
February 22, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28238795/reversal-of-phenotypic-abnormalities-by-crispr-cas9-mediated-gene-correction-in-huntington-disease-patient-derived-induced-pluripotent-stem%C3%A2-cells
#18
Xiaohong Xu, Yilin Tay, Bernice Sim, Su-In Yoon, Yihui Huang, Jolene Ooi, Kagistia Hana Utami, Amin Ziaei, Bryan Ng, Carola Radulescu, Donovan Low, Alvin Yu Jin Ng, Marie Loh, Byrappa Venkatesh, Florent Ginhoux, George J Augustine, Mahmoud A Pouladi
Huntington disease (HD) is a dominant neurodegenerative disorder caused by a CAG repeat expansion in HTT. Here we report correction of HD human induced pluripotent stem cells (hiPSCs) using a CRISPR-Cas9 and piggyBac transposon-based approach. We show that both HD and corrected isogenic hiPSCs can be differentiated into excitable, synaptically active forebrain neurons. We further demonstrate that phenotypic abnormalities in HD hiPSC-derived neural cells, including impaired neural rosette formation, increased susceptibility to growth factor withdrawal, and deficits in mitochondrial respiration, are rescued in isogenic controls...
February 21, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28238794/efficient-precision-genome-editing-in-ipscs-via-genetic-co-targeting-with%C3%A2-selection
#19
Katie A Mitzelfelt, Chris McDermott-Roe, Michael N Grzybowski, Maribel Marquez, Chieh-Ti Kuo, Michael Riedel, Shuping Lai, Melinda J Choi, Kurt D Kolander, Daniel Helbling, David P Dimmock, Michele A Battle, Chuanchau J Jou, Martin Tristani-Firouzi, James W Verbsky, Ivor J Benjamin, Aron M Geurts
Genome editing in induced pluripotent stem cells is currently hampered by the laborious and expensive nature of identifying homology-directed repair (HDR)-modified cells. We present an approach where isolation of cells bearing a selectable, HDR-mediated editing event at one locus enriches for HDR-mediated edits at additional loci. This strategy, called co-targeting with selection, improves the probability of isolating cells bearing HDR-mediated variants and accelerates the production of disease models.
February 22, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28238792/an-all-recombinant-protein-based-culture-system-specifically-identifies-hematopoietic-stem-cell-maintenance-factors
#20
Aki Ieyasu, Reiko Ishida, Takaharu Kimura, Maiko Morita, Adam C Wilkinson, Kazuhiro Sudo, Toshinobu Nishimura, Jun Ohehara, Yoko Tajima, Chen-Yi Lai, Makoto Otsu, Yukio Nakamura, Hideo Ema, Hiromitsu Nakauchi, Satoshi Yamazaki
Hematopoietic stem cells (HSCs) are considered one of the most promising therapeutic targets for the treatment of various blood disorders. However, due to difficulties in establishing stable maintenance and expansion of HSCs in vitro, their insufficient supply is a major constraint to transplantation studies. To solve these problems we have developed a fully defined, all-recombinant protein-based culture system. Through this system, we have identified hemopexin (HPX) and interleukin-1α as responsible for HSC maintenance in vitro...
February 10, 2017: Stem Cell Reports
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