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https://www.readbyqxmd.com/read/28802996/il-33-matured-dendritic-cells-promote-th17-cell-responses-via-il-1%C3%AE-and-il-6
#1
Su-Ho Park, Myun Soo Kim, Hui Xuan Lim, Daeho Cho, Tae Sung Kim
IL-33 is associated with a variety of autoimmune diseases, such as sclerosis, inflammatory bowel disease, and rheumatoid arthritis. Although IL-33 is mainly involved in the induction of Th2 cells, however, the relationship between IL-33 and Th17 cells is still largely unknown. In this study, we investigated the effects of IL-33 on DC-mediated CD4(+) T cell activation and Th17 cell differentiation because DCs are essential cells for presenting self-antigens to CD4(+) T cells in autoimmune disease conditions...
August 10, 2017: Cytokine
https://www.readbyqxmd.com/read/28802265/syntrophomonas-wolfei-uses-a-nadh-dependent-ferredoxin-independent-fefe-hydrogenase-to-reoxidize-nadh
#2
Nathaniel A Losey, Florence Mus, John W Peters, Huynh M Le, Michael J McInerney
Syntrophomonas wolfei syntrophically oxidizes short-chain fatty acids (four to eight carbon in length) when grown in coculture with a hydrogen- and/or formate-using methanogen. The oxidation of 3-hydroxybutyryl-CoA, formed during butyrate metabolism, results in the production of NADH. The enzyme systems involved in NADH reoxidation in S. wolfei are not well understood. The genome of S. wolfei contains a multimeric [FeFe]-hydrogenase that may be a mechanism for NADH reoxidation. The S. wolfei genes for the multimeric [FeFe]-hydrogenase (hyd1ABC; SWOL_RS05165, SWOL_RS05170, SWOL_RS05175) and [FeFe]-hydrogenase maturation proteins (SWOL_RS05180, SWOL_RS05190, SWOL_RS01625) were co-expressed in Escherichia coli and the recombinant Hyd1ABC was purified and characterized...
August 11, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28801972/brief-report-a-differential-transcriptomic-profile-of-ex-vivo-expanded-adult-human-hematopoietic-stem-cells-empowers-them-for-engraftment-better-than-their-surface-phenotype
#3
Nikoletta Psatha, Grigorios Georgolopoulos, Susan Phelps, Thalia Papayannopoulou
Transplantation of small cord blood (CB) units, or of autologous ex vivo-genetically modified adult hematopoietic stem cells (HSC), face the common challenge of suboptimal HSC doses for infusion and impaired engraftment of the transplanted cells. Ex vivo expansion of HSCs, using either cell-based coculture approaches or especially small molecules have been successfully tested mainly in CB and in prolonged cultures. Here, we explored whether innovative combinations of small molecules can sufficiently, after short culture, expand adult HSCs while retaining their functionality in vivo...
August 11, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28794626/folic-acid-functionalized-polyethylenimine-superparamagnetic-iron-oxide-nanoparticles-as-theranostic-agents-for-magnetic-resonance-imaging-and-pd-l1-sirna-delivery-for-gastric-cancer
#4
Xin Luo, Xia Peng, Jingying Hou, Shuyun Wu, Jun Shen, Lingyun Wang
Programmed death ligand-1 (PD-L1), which is highly expressed in gastric cancers, interacts with programmed death-1 (PD-1) on T cells and is involved in T-cell immune resistance. To increase the therapeutic safety and accuracy of PD-1/PD-L1 blockade, RNA interference through targeted gene delivery was performed in our study. We developed folic acid (FA)- and disulfide (SS)-polyethylene glycol (PEG)-conjugated polyethylenimine (PEI) complexed with superparamagnetic iron oxide Fe3O4 nanoparticles (SPIONs) as a siRNA-delivery system for PD-L1 knockdown...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28791370/tumor-associated-macrophages-induce-the-expression-of-foxq1-to-promote-epithelial-mesenchymal-transition-and-metastasis-in-gastric-cancer-cells
#5
Jian Guo, Yan Yan, Yu Yan, Qinyue Guo, Mingxin Zhang, Jia Zhang, David Goltzman
Gastric cancer (GC) is one of the most common malignancies, and is the second leading cause of cancer-related deaths worldwide. Macrophages infiltrated in the tumor microenvironment (TME) called tumor-associated macrophages (TAMs) are key orchestrators in TME. In GC, it has been reported that infiltration of TAMs is associated with epithelial-mesenchymal transition (EMT)-related proteins in human GC tissues, but the exactly mechanism has not been clarified. In the present study, we aimed to elucidate the underlying mechanism of TAMs on GC cells...
August 3, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28791291/atopic-dermatitis-studies-through-in-vitro-models
#6
REVIEW
Evelyne De Vuyst, Michel Salmon, Céline Evrard, Catherine Lambert de Rouvroit, Yves Poumay
Atopic dermatitis (AD) is a complex inflammatory skin condition that is not fully understood. Epidermal barrier defects and Th2 immune response dysregulations are thought to play crucial roles in the pathogenesis of the disease. A vicious circle takes place between these alterations, and it can further be complicated by additional genetic and environmental factors. Studies investigating in more depth the etiology of the disease are thus needed in order to develop functional treatments. In recent years, there have been significant advances regarding in vitro models reproducing important features of AD...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28789988/the-use-of-retronectin-in-studies-requiring-in-vitro-hiv-1-infection-of-human-hematopoietic-stem-progenitor-cells
#7
Tetsuo Tsukamoto, Seiji Okada
Human immunodeficiency virus (HIV) causes damage, directly or indirectly, to the whole hematopoietic system, including CD34(+) hematopoietic stem/progenitor cells (HSPCs). CXCR4-tropic strains of HIV-1 may affect the function of CD34(+)CXCR4(+) progenitor cells either by infecting the cells or modifying the dynamics of more differentiated hematopoietic cells. However, CD34(+) cells are known for their resistance to HIV-1 infection in vitro, which restricts any detailed analysis of the impact of HIV on HSPCs...
August 5, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28783453/development-of-human-salivary-gland-like-tissue-in-vitro
#8
Marc Burghartz, Simon Lennartz, Matthias Schweinlin, Rudolf Hagen, Norbert Kleinsasser, Stephan Hackenberg, Gudrun Steußloff, Agmal Scherzad, Kathrin Radeloff, Christian Ginzkey, Heike Walles, Marco Metzger
The loss of salivary gland function caused by radiation therapy of the head and neck is a serious condition and it affects a patient's quality of life. The current lack of effective therapies demands new options to be explored. This study tested whether human salivary gland epithelial cells (SGECs) could be successfully cultured on a decellularized porcine gut matrix (SIS-muc) in both mono- and coculture with microvascular endothelial cells (mvECs). By performing immunofluorescence imaging, transmission as well as scanning electron microscopy (SEM), quantitative polymerase chain reaction (qPCR), and an amylase enzyme assay, it was investigated as to what extent the three-dimensional (3D)-cultured cells could maintain their molecular differentiation and the production of working α-amylase (α-AMY) compared with two-dimensional (2D) culture...
August 4, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28782148/autonomous-xenogenic-cell-fusion-of-murine-and-chick-skeletal-muscle-myoblasts
#9
Tomohide Takaya, Yuma Nihashi, Shotaro Kojima, Tamao Ono, Hiroshi Kagami
Cell-cell fusion has been a great technology to generate valuable hybrid cells and organisms such as hybridomas. In this study, skeletal muscle myoblasts were utilized to establish a novel method for autonomous xenogenic cell fusion. Myoblasts are mononuclear myogenic precursor cells and fuse mutually to form multinuclear myotubes. We generated murine myoblasts (mMBs) expressing green fluorescent protein (GFP) termed mMB-GFP, and the chick myoblasts (chMBs) expressing Discosoma red fluorescent protein (DsRed) termed chMB-DsRed...
August 7, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28781957/indoxyl-sulfate-a-uremic-toxin-in-chronic-kidney-disease-suppresses-both-bone-formation-and-bone-resorption
#10
Kenta Watanabe, Tsukasa Tominari, Michiko Hirata, Chiho Matsumoto, Junya Hirata, Gillian Murphy, Hideaki Nagase, Chisato Miyaura, Masaki Inada
Abnormalities of bone turnover are commonly observed in patients with chronic kidney disease (CKD), and the low-turnover bone disease is considered to be associated with low serum parathyroid hormone (PTH) levels and skeletal resistance to PTH. Indoxyl sulfate (IS) is a representative uremic toxin that accumulates in the blood of patients with CKD. Recently, we have reported that IS exacerbates low bone turnover induced by parathyroidectomy (PTX) in adult rats, and suggested that IS directly induces low bone turnover through the inhibition of bone formation by mechanisms unrelated to skeletal resistance to PTH...
August 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28780618/upregulated-irak1-and-irak4-promoting-the-production-of-ifn-%C3%AE-and-il-17-in-behcet-s-disease
#11
Min Sun, Peizeng Yang, Yan Yang, Jian Ye
PURPOSE: To investigate the expression and function of IRAK1 and IRAK4 involved in the development of Behcet's disease. METHODS: Twenty-eight Behcet's patients and thirty-two normal subjects were involved in this study. The mRNA levels of IRAK1 and IRAK4 from active Behcet's patients, inactive Behcet's patients and normal controls were detected using real-time quantitative PCR. CD4(+)T cells were extracted from peripheral blood mononuclear cells of active Behcet's patients and normal controls...
August 5, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28772272/vascularized-cardiac-spheroids-as-novel-3d-in-vitro-models-to-study-cardiac-fibrosis
#12
Gemma A Figtree, Kristen J Bubb, Owen Tang, Eddy Kizana, Carmine Gentile
Spheroid cultures are among the most explored cellular biomaterials used in cardiovascular research, due to their improved integration of biochemical and physiological features of the heart in a defined architectural three-dimensional microenvironment when compared to monolayer cultures. To further explore the potential use of spheroid cultures for research, we engineered a novel in vitro model of the heart with vascularized cardiac spheroids (VCSs), by coculturing cardiac myocytes, endothelial cells, and fibroblasts isolated from dissociated rat neonatal hearts (aged 1-3 days) in hanging drop cultures...
August 4, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28768648/c-c-chemokine-receptor-type-5-ccr5-mediated-docking-of-transferred-tregs-protects-against-early-blood-brain-barrier-disruption-after-stroke
#13
Peiying Li, Long Wang, Yuxi Zhou, Yu Gan, Wen Zhu, Yuguo Xia, Xiaoyan Jiang, Simon Watkins, Alberto Vazquez, Angus W Thomson, Jun Chen, Weifeng Yu, Xiaoming Hu
BACKGROUND: Despite recent evidence demonstrating a potent protective effect of adoptively transferred regulatory T cells (Tregs) in ischemic stroke, the mechanism for Treg mobilization and activation in the ischemic brain is, remarkably, unknown. This study determines the role of C-C chemokine receptor type 5 (CCR5) in mediating the docking and activation of transferred Tregs in their protection of early blood-brain barrier disruption after stroke. METHODS AND RESULTS: Adoptive transfer of CCR5(-/-) Tregs failed to reduce brain infarct or neurological deficits, indicating an indispensable role of CCR5 in Treg-afforded protection against cerebral ischemia...
August 2, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28765650/implication-of-redd1-in-the-activation-of-inflammatory-pathways
#14
Faustine Pastor, Karine Dumas, Marie-Astrid Barthélémy, Claire Regazzetti, Noémie Druelle, Pascal Peraldi, Mireille Cormont, Jean-François Tanti, Sophie Giorgetti-Peraldi
In response to endotoxemia, the organism triggers an inflammatory response, and the visceral adipose tissue represents a major source of proinflammatory cytokines. The regulation of inflammation response in the adipose tissue is thus of crucial importance. We demonstrated that Regulated in development and DNA damage response-1 (REDD1) is involved in inflammation. REDD1 expression was increased in response to lipopolysaccharide (LPS) in bone marrow derived macrophages (BMDM) and in epidydimal adipose tissue...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28758111/the-neuroprotective-effects-of-muscle-derived-stem-cells-via-brain-derived-neurotrophic-factor-in-spinal-cord-injury-model
#15
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
https://www.readbyqxmd.com/read/28757881/intrinsic-variability-present-in-wharton-s-jelly-mesenchymal-stem-cells-and-t-cell-responses-may-impact-cell-therapy
#16
Fernanda Vieira Paladino, Luiz Roberto Sardinha, Carla Azevedo Piccinato, Anna Carla Goldberg
Wharton's jelly mesenchymal stem cells (WJ-MSC) exhibit immunomodulatory effects on T cell response. WJ-MSC are easy to collect, process, and proliferate rapidly in culture, but information on the variability of individual cell samples impacting upon in vitro expansion, immunomodulatory potential, and aging processes is still lacking. We propose to evaluate the immunomodulatory cytokine profile and capacity to inhibit T cell proliferation of WJ-MSC progressing to replicative senescence in order to analyze if expected responses are affected...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28755405/serum-ifn-%C3%AE-predicts-the-therapeutic-effect-of-mesenchymal-stem-cells-transplantation-in-systemic-lupus-erythematosus-patients
#17
Dandan Wang, Shiying Wang, Saisai Huang, Zhuoya Zhang, Xinran Yuan, Xuebing Feng, Liwei Lu, Lingyun Sun
Umbilical cord (UC) derived mesenchymal stem cells (MSCs) show immunoregulatory properties on various immune cells and display therapeutic effects on various autoimmune diseases such as systemic lupus erythematosus (SLE). The aim of this study is to investigate the effect of SLE environment on UC MSCs and to identify the possible serum biomarker to predict the therapeutic effect. UC MSCs were cocultured with peripheral blood mononuclear cells (PBMCs) from active lupus patients and the proliferation, apoptosis and surface markers of UC MSCs were observed...
July 29, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28752870/endothelium-induced-three-dimensional-invasion-of-heterogeneous-glioma-initiating-cells-in-a-microfluidic-coculture-platform
#18
Yuta Chonan, Sotaro Taki, Oltea Sampetrean, Hideyuki Saya, Ryo Sudo
Glioblastoma (GBM) is a highly invasive primary brain tumor that displays cellular heterogeneity, which is composed of glioma initiating cells (GICs) and their differentiated progeny. GICs play an important role in driving aggressive invasion. In particular, the interaction between GICs and blood vessels is critical because blood vessels are known to serve as routes for the invasion of GICs. However, the effect of endothelial cells on the three-dimensional (3D) invasion process of GICs as well as the spatial relationship between GICs and their differentiated progeny remains unclear...
July 28, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28748023/antagonistic-and-quantitative-assessment-of-indigenous-lactic-acid-bacteria-in-different-varieties-of-ogi-against-gastrointestinal-pathogens
#19
Ayorinde Oluwatobiloba Afolayan, Funmilola Abidemi Ayeni, Werner Ruppitsch
INTRODUCTION: Ogi is a popular fermented cereal gruel consumed mainly in the western part of Nigeria. Traditionally, uncooked Ogi is normally administered to diarrhoea patients to reduce the frequency of stooling. This study was therefore undertaken to identify, quantify and determine the antimicrobial properties of lactic acid bacteria (LAB) isolated from Ogi. METHODS: The Ogi samples (Yellow, white, sorghum) were obtained from different market in Ibadan, Nigeria and Ogi control (cooked, uncooked and Omidun) were prepared with the viable counts of bacteria monitored over 5 days period...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28746930/cocultivation-of-mesenchymal-stem-cells-and-endothelial-progenitor-cells-reveals-antiapoptotic-and-proangiogenic-effects
#20
Dominik Steiner, Katrin Köhn, Justus P Beier, Michael Stürzl, Raymund Horch, Andreas Arkudas
Integrating bioartificial tissues into the host vasculature is a prerequisite for tissue engineering applications. Endothelial progenitor cells (EPCs) display a high angiogenic potential and a low donor-site morbidity, making them ideal for tissue engineering applications. In our study we used a murine EPC cell line (T17b) and rat mesenchymal stem cells (MSCs) for cocultivation experiments. MSCs were cocultured with increasing T17b EPC amounts. Furthermore, MSCs in monoculture were treated with conditioned medium (CM) from T17b EPCs and T17b EPCs were treated with CM from MSCs...
July 27, 2017: Cells, Tissues, Organs
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