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https://www.readbyqxmd.com/read/29045972/-acetylsalicylic-acid-treatment-enhanced-immunomodulatory-function-of-mesenchymal-stem-cells-derived-from-gingiva
#1
R L Yang, T T Yu, Y H Zhou
OBJECTIVE: To analyze the role of acetylsalicylic acid (ASA) in immunomodulation of mesenchymal stem cells derived from gingiva (GMSCs), and to explore the role of ASA in enhancing the immumomodulation of GMSCs and the capacity of GMSCs to treat immune disorders and the underlying mechanism. METHODS: Flow cytometry analysis were used to analyze the role of ASA in the expression of stem cells surface markers CD146, CD105, CD90, CD34 and CD45 in GMSCs,and the GMSCs proliferation was analyzed by 5-bromo-2-deoxyuridine (BrdU) staining and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045963/-tumor-derived-igg-suppress-the-proliferation-of-t-cells-in-cord-blood
#2
E Y Liu, J F Liu, W W Shao, L Xiao, G H Li, X H Chang, X Y Qiu
OBJECTIVE: To explore the function of tumor derived IgG (tIgG) and whether the tIgG can inhibit T cells activity. METHODS: The tIgG was purified from ovarian cancer tissue. The cord blood monocyte cells (CBMC) and cord blood lymphocyte (CBL) were isolate from human umbilical cord blood. The CBMC and CBL were stimulated with phytohaemagg lutinin (PHA) in order to let the CBMC and CBL in the state of proliferation. Carboxyfluorescein succinimidyl amino ester (CFSE) was cultured with CBMC and CBL...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045962/-myeloid-derived-suppressor-cells-promoted-autologous-b-cell-proliferation-in-rheumatoid-arthritis
#3
W Chen, F L Hu, H J Liu, L L Xu, Y N Li, Z G Li
OBJECTIVE: To investigate the effect of myeloid-derived suppressor cells (MDSC) on pro-liferation of B lymphocytes in rheumatoid arthritis (RA) patients. METHODS: The peripheral blood specimens were collected from 15 healthy adults and 38 RA patients who were divided into high disease activity group, medium activity group and low activity group according to their 28-joint disease activity score (DAS28). And the frequencies of MDSC were determined by flow cytometry...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045937/adenovirus-mediated-expression-of-bmp-2-and-bfgf-in-bone-marrow-mesenchymal-stem-cells-combined-with-demineralized-bone-matrix-for-repair-of-femoral-head-osteonecrosis-in-beagle-dogs
#4
Wu-Xun Peng, Lei Wang
BACKGROUND: This study investigated the effect of using adenovirus-mediated expression of bone morphogenetic protein 2 (Ad-BMP-2) and basic fibroblast growth factor (bFGF) in bone marrow mesenchymal stem cells (BMSCs) in combination with a demineralized bone matrix (DBM) to repair osteonecrosis of the femoral head (ONFH) in Beagle dogs. METHODS: A total of 30 Beagle dogs were selected for the isolation of BMSCs, which were cultured and transfected with the recombinant adenovirus vector Ad-BMP2-bFGF-GFP (carrying BMP-2 and bFGF) or a control adenovirus plasmid (encoding green fluorescent protein (Ad-GFP))...
October 18, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29045918/cervical-cancer-cells-hela-response-to-photodynamic-therapy-using-a-zinc-phthalocyanine-photosensitizer
#5
Natasha Hodgkinson, Cherie Ann Kruger, Mpho Mokwena, Heidi Abrahamse
Cervical cancer is the most common gynecological malignancy worldwide, and the leading cause of cancer related deaths among females. Conventional treatment for early cervical cancer is radical hysterectomy. In locally advanced cancer the treatment of choice is concurrent chemo radiation. Although such treatment methods show promise, they do have adverse side effects. To minimize these effects, as well as prevent cancer re-occurrence, new treatment methods are being investigated. Photodynamic therapy (PDT) involves the selective uptake of a photosensitizer (PS) by cancer cells, illumination with light of an appropriate wavelength that triggers a photochemical reaction leading to the generation of reactive oxygen and subsequent tumor regression...
October 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29045816/assessment-of-bacterial-membrane-fluidity-by-flow-cytometry
#6
Marielle Bouix, Sarrah Ghorbal
It can be interesting to evaluate the cytoplasmic membrane fluidity of bacteria in order to understand the impacts of stresses during processing. Traditionally, membrane fluidity was assessed by fluorescence anisotropy measured by spectrofluorimetry, but this method does not make it possible to reveal the heterogeneity of bacterial populations. Flow cytometry, as opposed to spectrofluorimetry, has the ability to simultaneously detect different sub-populations. We developed a new method to measure the fluorescence anisotropy of bacterial membranes using flow cytometry...
October 15, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29045717/interaction-between-calcium-and-potassium-modulates-elongation-rate-in-cotton-fiber-cells
#7
Kai Guo, Lili Tu, Yonghui He, Jinwu Deng, Maojun Wang, Hui Huang, Zhonghua Li, Xianlong Zhang, Miriam Gifford
Calcium (Ca2+) is necessary for fiber cell development in cotton (Gossypium hirsutum), both as a cell wall structural component and for environmental signaling responses. It is also known that potassium (K+) plays a critical role in cotton fiber cell elongation. However, it is unclear whether Ca2+ integrates its activities with K+ to regulate fiber elongation. Here, we report the novel discovery that Ca2+ deficiency, when integrated with K+ signaling, promotes fiber elongation. Using inductively coupled plasma-mass spectrometry (ICP-MS), we determined dynamic profiles of the ionome in ovules and fibers at different developmental stages, and found that a high accumulation of macro-elements, but not Ca2+, was associated with longer fibers...
October 13, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29045624/long-term-cell-culture-isolated-from-lesions-of-mice-infected-with-leishmania-amazonensis-a-new-approach-to-study-mononuclear-phagocyte-subpopulations-during-the-infection
#8
Myriam Janeth Salazar Terreros, Luis Augusto Visani de Luna, Selma Giorgio
Leishmanioses are neglected diseases and the parasite Leishmania survives and proliferates within mononuclear phagocytes, particularly macrophages. In vitro studies of the immunology and cell biology of leishmaniosis are performed in murine peritoneum and bone marrow macrophages and immortalized cell lines despite the normal and injured tissue-specific heterogeneity of macrophages. In this work we established an ex vivo methodology to culture lesional cells from BALB/c mice infected with L. amazonensis. The cells were successfully isolated from footpad skin lesions and those exhibiting macrophage morphology were maintained in long-term culture (12 days), while the small number of lymphocytes, polymorphonuclear and unidentified cells died after one day of culture...
October 14, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/29045588/the-mycotoxin-metabolite-deepoxy-deoxynivalenol-increases-apoptosis-and-decreases-steroidogenesis-in-bovine-ovarian-theca-cells
#9
Hilda M Guerrero-Netro, Anthony Estienne, Younès Chorfi, Christopher A Price
The mycotoxin deoxynivalenol (DON) has been shown to inhibit ovarian granulosa cell function in cattle in vitro, but it is not known whether DON or its metabolite deepoxy-DON (DOM-1) affect theca cell function. The objectives of the present study were to determine the effects of DON and of DOM-1 on theca cell steroidogenesis and apoptosis, and to determine the main pathways through which they act. Bovine theca cells were cultured in a non-luteinizing serum-free culture system, and challenged with DON or DOM-1 for 4 d to measure steroidogenesis and apoptosis, for 1-8 h to measure immediate-early genes, and for 5-60 min to measure phosphorylation of intracellular signaling proteins...
October 13, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29045568/loss-of-protein-kinase-novel-1-pkn1-is-associated-with-mild-systolic-and-diastolic-contractile-dysfunction-increased-phospholamban-thr17-phosphorylation-and-exacerbated-ischaemia-reperfusion-injury
#10
Asvi A Francois, Kofo Obasanjo-Blackshire, James E Clark, Andrii Boguslavskyi, Mark R Holt, Peter Parker, Michael S Marber, Richard J Heads
Aims: PKN1 is a stress-responsive protein kinase acting downstream of small GTP-binding proteins of the Rho/Rac family. The aim was to determine its role in endogenous cardioprotection. Methods and Results: Hearts from PKN1 knockout (KO) or wild type (WT) littermate control mice were perfused in Langendorff mode and subjected to global ischemia and reperfusion (I/R). Myocardial infarct size was doubled in PKN1 KO hearts compared to WT hearts. PKN1 was basally phosphorylated on the activation loop Thr778 PDK1 target site which was unchanged during I/R...
October 16, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29045472/sulfites-inhibit-the-growth-of-four-species-of-beneficial-gut-bacteria-at-concentrations-regarded-as-safe-for-food
#11
Sally V Irwin, Peter Fisher, Emily Graham, Ashley Malek, Adriel Robidoux
Sulfites and other preservatives are considered food additives to limit bacterial contamination, and are generally regarded as safe for consumption by governmental regulatory agencies at concentrations up to 5000 parts per million (ppm). Consumption of bactericidal and bacteriostatic drugs have been shown to damage beneficial bacteria in the human gut and this damage has been associated with several diseases. In the present study, bactericidal and bacteriostatic effects of two common food preservatives, sodium bisulfite and sodium sulfite, were tested on four known beneficial bacterial species common as probiotics and members of the human gut microbiota...
2017: PloS One
https://www.readbyqxmd.com/read/29045238/hypergravity-induced-multicellular-spheroid-generation-with-different-morphological-patterns-precisely-controlled-on-a-centrifugal-microfluidic-platform
#12
Jiheum Park, Gi-Hun Lee, Joong Yull Park, Jung Chan Lee, Hee Chan Kim
In living tissue, cells exist in three-dimensional (3D) microenvironments with intricate cell-cell interactions. To model these cellular environments, numerous techniques for generating cell spheroids have been proposed and improved. However, previously reported methods still have limitations in uniformity, reproducibility, scalability, through-put, etc. Here, we present a centrifugal microfluidic-based spheroid (CMS) formation method for generating both co-culture and mono-culture 3D spheroids in a highly controlled manner...
October 18, 2017: Biofabrication
https://www.readbyqxmd.com/read/29045063/evaluating-manufacturing-process-profile-comparability-with-multivariate-equivalence-testing-case-study-of-cell-culture-small-scale-model-transfer
#13
Yang Cao, Daniel Obeng, Guodong Hui, Luting Xue, Yukun Ren, Xianjie Yu, Fei Wang, Chad Atwell
This paper studies the Generalized Mahalanobis Distance (GMD) approach proposed by Hoffelder(1) which measures the dissimilarity of two multivariate Gaussian distributions with arbitrary covariance matrices and unequal sample sizes. This investigation demonstrated that, with appropriate adjustment, the GMD approach can achieve the targeted nominal Type I error and provide sufficient power for testing equivalence between two profile populations. The adjusted GMD approach was applied to examine the equivalence of harvest profiles between a 12L small scale model and 2000L manufacturing scale in a transfer study performed at Sanofi Speciality Care Framingham Biologics...
October 16, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/29045016/liquid-crystalline-networks-toward-regenerative-medicine-and-tissue-repair
#14
Daniele Martella, Paolo Paoli, Josè M Pioner, Leonardo Sacconi, Raffaele Coppini, Lorenzo Santini, Matteo Lulli, Elisabetta Cerbai, Diederik S Wiersma, Corrado Poggesi, Cecilia Ferrantini, Camilla Parmeggiani
The communication reports the use of liquid crystalline networks (LCNs) for engineering tissue cultures with human cells. Their ability as cell scaffolds for different cell lines is demonstrated. Preliminary assessments of the material biocompatibility are performed on human dermal fibroblasts and murine muscle cells (C2C12), demonstrating that coatings or other treatments are not needed to use the acrylate-based materials as support. Moreover, it is found that adherent C2C12 cells undergo differentiation, forming multinucleated myotubes, which show the typical elongated shape, and contain bundles of stress fibers...
October 17, 2017: Small
https://www.readbyqxmd.com/read/29044948/intracellular-pathway-and-subsequent-transformation-of-hydroxyapatite-nanoparticles-in-the-saos-2-osteoblast-cell-line
#15
André L Rossi, Mariana M Longuinho, Marcelo N Tanaka, Marcos Farina, Radovan Borojevic, Alexandre M Rossi
Internalization of hydroxyapatite nanoparticles in SAOS-2 osteoblasts for 2 and 24 h was investigated in vitro using 5 and 50 µg/mL nanoparticles in culture medium. No cytotoxic effects were observed in a PrestoBlue viability assay. Focused ion beam-scanning electron microscopy and transmission electron microscopy were used to study nanoparticle trafficking inside cells and to characterize the physicochemical properties of the remodeled nanoparticles. Nanoparticles were actively internalized by cells and maintained in intracellular membrane-bound compartments...
October 17, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29044882/sox2-communicates-with-tregs-through-ccl1-to-promote-the-stemness-property-of-breast-cancer-cells
#16
Yingxi Xu, Xiaoli Dong, Pingping Qi, Yujie Ye, Wenzhi Shen, Liang Leng, Lina Wang, Xuefei Li, Xiaohe Luo, Yanan Chen, Peiqing Sun, Rong Xiang, Na Li
As an important component of tumor microenvrionment, CD4(+) CD25(+) Tregs reduce antitumor immunity, promote angiogenesis and metastasis in breast cancer. However, their function in regulating the "stemness" of tumor cells and the communication between Tregs and cancer stem cells (CSCs) remain elusive. Here, we disclose that the primarily cultured Tregs isolated from breast-tumor-bearing Foxp3-EGFP mouse up-regulate the stemness property of breast cancer cells. Tregs increased the side-population and the ALDH(br) population of mouse breast cancer cells, promoted their sphere formation in a paracrine manner and enhanced the expression of stemness genes, such as Sox2 etc...
October 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/29044869/polyproline-is-a-minimal-antifreeze-protein-mimetic-and-enhances-the-cryopreservation-of-cell-monolayers
#17
Ben Graham, Trisha L Bailey, Joseph R J Healey, Moreno Marcellini, Sylvain Deville, Matthew I Gibson
Tissue engineering, gene therapy, drug screening and emerging regenerative medicine therapies are fundamentally reliant on high-quality adherent cell culture, but current methods to cryopreserve cells in this format can give low cell yields and requires large volumes of solvent 'antifreezes'. Herein we report polyproline is a minimum (bio)synthetic mimic of antifreeze proteins, which is accessible by solution, solid phase and recombinant methods. We demonstrate that polyproline has ice recrystallization inhibition activity linked to its amphipathic helix and that it enhances the DMSO- cryopreservation of adherent cell lines...
October 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29044808/neuroprotective-effects-of-human-mesenchymal-stem-cells-hmsc-and-platelet-derived-growth-factor-pdgf-on-human-retinal-ganglion-cells-rgcs
#18
Andrew Osborne, Julie Sanderson, Keith R Martin
Optic neuropathies such as glaucoma occur when retinal ganglion cells (RGCs) in the eye are injured. Strong evidence suggests mesenchymal stem cells (MSCs) could be a potential therapy to protect RGCs, however little is known regarding their effect on the human retina. We therefore investigated if human MSCs (hMSCs), or platelet derived growth factor (PDGF) as produced by hMSC, could delay RGC death in a human retinal explant model of optic nerve injury. Our results showed hMSCs and the secreted growth factor PDGF-AB could substantially reduce human RGC loss and apoptosis following axotomy...
October 17, 2017: Stem Cells
https://www.readbyqxmd.com/read/29044680/effects-of-three-blood-derived-products-on-equine-corneal-cells-an-in-vitro-study
#19
J O Rushton, E Kammergruber, A Tichy, M Egerbacher, B Nell, S Gabner
BACKGROUND: Despite advances in therapy of corneal ulcerative diseases in horses, a vast number of cases require surgical intervention, due to poor response to treatment. Topical application of serum has been used for many years, based on its anti-collagenolytic properties and the presence of growth factors promoting corneal wound healing. However, although other blood derived products i.e. platelet rich plasma (PRP), plasma rich in growth factors (PRGF) have been widely used in equine orthopaedics and in human ophthalmology, no reports of the effects of these blood derived products exist in equine ophthalmology...
October 16, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29044549/effects-of-clioquinol-on-the-scuticociliatosis-causing-protozoan-miamiensis-avidus-in-olive-flounder-paralichthys-olivaceus
#20
J-H Lee, J-J Park, J-H Choi, S-Y Kang, Y-J Kang, K H Park
Scuticociliatosis is a devastating and intractable protozoal disease in olive flounder, leading to a significant loss throughout the year. This study aimed to investigate a systemically effective antiscuticociliatosis agent for olive flounder for better absorption into the infected internal organs. The in vitro and in vivo antiscuticociliatosis effects of clioquinol (CQ) were examined after screening 30 biocidal agents against the highly pathogenic scuticociliate Miamiensis avidus. CQ was the most potent in vitro drug of those tested against cultured M...
October 17, 2017: Journal of Fish Diseases
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