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https://www.readbyqxmd.com/read/29236333/effect-and-mechanism-of-lncrna-hotair-on-occurrence-and-development-of-gastric-cancer
#1
Xuan Feng, Suiping Huang
OBJECTIVE: In this study, we aimed at looking for the lncRNA abnormally expressed in gastric cancer (GC) tissues, and analyzing the association of its expression level with the clinicopathological feature and patient prognosis. The biological function of this lncRNA in occurrence and development of GC was studied in vivo and in vitro. The underlying molecular mechanism was further discussed. METHODS: We investigated the lncRNA expression level in GC tissues and normal gastric mucosa tissues by lncRNA chips analysis...
December 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29233007/investigation-of-hypersensitivity-potential-of-diacetyl-by-determining-cytokine-profiles
#2
A Elkama, O C Ulker, E Teker, A Karakaya, A E Karakaya
Exposure to chemicals in workplace settings leads to significant occupational diseases related to hypersensitivity reactions. In recent years, diacetyl which is used as a food additive is thought to be as an important hazard due to its sensitization potency for worker's health. Therefore, in this study, we aimed to investigate the sensitization potency of diacetyl for the purpose of its hazard evaluation. Nonradioactive ex vivo local lymph node assay: BrdU-enzyme-linked immunosorbent assay (ELISA) method with short-term and long-term exposure protocols were conducted based on animal welfare principles...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29230506/the-isoprenoid-end-product-n6-isopentenyladenosine-reduces-inflammatory-response-through-the-inhibition-of-the-nf%C3%AE%C2%BAb-and-stat3-pathways-in-cystic-fibrosis-cells
#3
Antonietta Santoro, Elena Ciaglia, Vanessa Nicolin, Alessandra Pescatore, Lucia Prota, Mario Capunzo, Matilde V Ursini, Stefania L Nori, Maurizio Bifulco
OBJECTIVE: N6-isopentenyladenosine (iPA) is an intermediate of the mevalonate pathway that exhibits various anti-cancer effects. However, studies on its anti-inflammatory activity are scarce and underlying molecular mechanisms are unknown. Therefore, we aimed to investigate the ability of iPA to exert anti-inflammatory effects in the human cystic fibrosis (CF) cell model of exacerbated inflammation. MATERIALS AND METHODS: TNFα-stimulated CF cells CuFi-1 and its normal counterpart NuLi-1 were pre-treated with increasing concentrations of iPA and cell viability and proliferation were assessed by MTT and BrdU assays...
December 11, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29228630/transplantation-of-ips-cell-derived-neural-progenitors-overexpressing-sdf-1%C3%AE-increases-regeneration-and-functional-recovery-after-ischemic-stroke
#4
Monica Chau, Todd C Deveau, Mingke Song, Zheng Z Wei, Xiaohuan Gu, Shan Ping Yu, Ling Wei
Ischemic stroke is a leading cause of human death and disability while clinical treatments are limited. The adult brain possesses endogenous regenerative activities that may benefit tissue repair after stroke. Trophic factors such as stromal cell-derived factor 1 alpha (SDF-1α) are upregulated in the ischemic brain, which promote endogenous regeneration. The regenerative response, however, is normally insufficient. Transplantation of exogenous cells has been explored as regenerative therapies. One promising cell type for transplantation is induced pluripotent stem (iPS) cells which are cells genetically reprogrammed from adult somatic cells...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228576/comparison-of-tumor-biology-of-two-distinct-cell-sub-populations-in-lung-cancer-stem-cells
#5
Jianyu Wang, Zhiwei Sun, Yongli Liu, Liangsheng Kong, Shixia Zhou, Junlin Tang, Hongmei Rosie Xing
Characterization of the stem-like properties of cancer stem cells (CSCs) remain indirect and qualitative, especially the ability of CSCs to undergo asymmetric cell division for self renewal and differentiation, a unique property of cells of stem origin. It is partly due to the lack of stable cellular models of CSCs. In this study, we developed a new approach for CSC isolation and purification to derive a CSC-enriched cell line (LLC-SE). By conducting five consecutive rounds of single cell cloning using the LLC-SE cell line, we obtained two distinct sub-population of cells within the Lewis lung cancer CSCs that employed largely symmetric division for self-renewal (LLC-SD) or underwent asymmetric division for differentiation (LLC-ASD)...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29218419/an-unexpected-improvement-in-spatial-learning-and-memory-ability-in-alpha-synuclein-a53t-transgenic-mice
#6
Qi Liu, YuYu Xu, WenPing Wan, ZeGang Ma
Growing evidence suggests, as Parkinson's disease (PD) progresses, that its non-motor symptoms appear prior to or in parallel with its motor deficits. Alpha-synuclein A53T transgenic mouse (A53T) is an essential tool to investigate the onsets and the extents of PD non-motor symptoms. Our aim is to investigate spatial learning and memory ability in A53T mice. In our rotarod tests, no motor coordination impairments were detected in mice of 3, 6, 9, and 12 months old. We then investigated their spatial learning and memory ability through Morris water maze in 3- and 9-month-old mice...
December 7, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29217680/non-newly-generated-immature-neurons-in-the-sheep-brain-are-not-restricted-to-cerebral-cortex
#7
Matteo Piumatti, Ottavia Palazzo, Chiara La Rosa, Paola Crociara, Roberta Parolisi, Federico Luzzati, Frederic Lévy, Luca Bonfanti
A newly proposed form of brain structural plasticity consists of non-newly generated, "immature" neurons of the adult cerebral cortex. Similar to newly generated neurons, these cells express the cytoskeletal protein Doublecortin (DCX), yet they are generated prenatally, then remaining in a state of immaturity for long periods. In rodents, the immature neurons are restricted to the paleocortex, whereas in other mammals are found also in neocortex. Here, we analyzed the DCX-expressing cells in the whole sheep brain of both sexes, to search for an indicator of structural plasticity at a cellular level in a relatively large-brained, long-living mammal...
December 7, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29214525/treatment-of-melanoma-with-selected-inhibitors-of-signaling-kinases-effectively-reduces-proliferation-and-induces-expression-of-cell-cycle-inhibitors
#8
Dorota Ciołczyk-Wierzbicka, Dorota Gil, Piotr Laidler
Cancer treatment often tends to involve direct targeting enzymes essential for the growth and proliferation of cancer cells. The aim of this study was the recognition of the possible role of selected protein kinases: PI3K, ERK1/2, and mTOR in cell proliferation and cell cycle in malignant melanoma. We investigated the role of protein kinase inhibitors: U0126 (ERK1/2), LY294002 (PI3K), rapamycin (mTOR), everolimus (mTOR), GDC-0879 (B-RAF), and CHIR-99021 (GSK3beta) in cell proliferation and expression of crucial regulatory cell cycle proteins in human melanoma cells: WM793 (VGP) and Lu1205 (metastatic)...
December 6, 2017: Medical Oncology
https://www.readbyqxmd.com/read/29211617/targeting-hdac3-activity-with-rgfp966-protects-against-retinal-ganglion-cell-nuclear-atrophy-and-apoptosis-after-optic-nerve-injury
#9
Heather M Schmitt, Cassandra L Schlamp, Robert W Nickells
PURPOSE: HDAC3 regulates nuclear atrophy as an early response to axonal injury in retinal ganglion cells (RGCs) following optic nerve crush (ONC). Since conditional knockout of Hdac3 prevents nuclear atrophy post ONC, HDAC3 selective inhibition with RGFP966 through localized and systemic dosing of RGFP966 is necessary for application to acute and chronic models of optic nerve injury. METHODS: C57BL/6 mice were injected intravitreally with 1-10 μM RGFP966 immediately following ONC, and retinas were analyzed at 5, 7, and 14 days for metrics of nuclear atrophy and cell loss...
December 6, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29209231/early-determination-of-the-periodontal-domain-by-the-wnt-antagonist-frzb-sfrp3
#10
Thimios A Mitsiadis, Pierfrancesco Pagella, Claudio Cantù
Odontogenesis results from the continuous and reciprocal interaction between cells of the oral epithelium and cranial neural crest-derived mesenchyme. The canonical Wnt signaling pathway plays a fundamental role in mediating these interactions from the earliest stages of tooth development. Here we analyze by in situ hybridization the expression patterns of the extracellular Wnt antagonist Frzb/Sfrp3. Although Frzb is expressed in dental mesenchymal cells from the earliest stages of odontogenesis, its expression is absent from a tiny population of mesenchymal cells immediately adjacent to the invaginating dental epithelium...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29208039/effects-of-metamizole-maa-and-paracetamol-on-proliferation-apoptosis-and-necrosis-in-the-pancreatic-cancer-cell-lines-patu-8988%C3%A2-t-and-panc-1
#11
Manuela Malsy, Bernhard Graf, Anika Bundscherer
BACKGROUND: Adenocarcinoma of the pancreas is one of the most aggressive cancer diseases affecting the human body. Recent research has shown the importance of the perioperative phase in disease progression. Particularly during this vulnerable phase, substances such as metamizole and paracetamol are given as general anesthetics and postoperative analgesics. Therefore, the effects of metamizole and paracetamol on tumor progression should be investigated in more detail because the extent to which these substances influence the carcinogenesis of pancreatic carcinoma is still unclear...
December 6, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29204817/oxyphenbutazone-promotes-cytotoxicity-in-rats-and-hep3b-cellsvia-suppression-of-pge2-and-deactivation-of-wnt-%C3%AE-catenin-signaling-pathway
#12
Shakir Saleem, Ruqaiyah Khan, Muhammad Afzal, Imran Kazmi
Hepatocellular carcinoma (HCC) is the fifth leading cause of death and is generally typified by elevated liver enzyme biomarkers, antioxidants, and chronic inflammation of hepatocytes. Although currently available drugs have shown remarkable alleviation of the cancerous condition, but at the same time they present a more severe challenge of toxic effects due to chemotherapy. Therefore, in order to bring more patient-compliant therapy, we aimed to refurbish the use of a COX inhibitor, oxyphenbutazone (OPB), with low dose of methotrexate (MTX) to treat diethyl nitrosamine (DENA)-induced HCC in Wistar rats and in Hep3B cells...
December 4, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29202785/anti-aggregant-tau-mutant-promotes-neurogenesis
#13
Maria Joseph, Marta Anglada-Huguet, Katharina Paesler, Eckhard Mandelkow, Eva-Maria Mandelkow
BACKGROUND: The microtubule-associated protein Tau plays a role in neurodegeneration as well as neurogenesis. Previous work has shown that the expression of the pro-aggregant mutant Tau repeat domain causes strong aggregation and pronounced neuronal loss in the hippocampus whereas the anti-aggregant form has no deleterious effects. These two proteins differ mainly in their propensity to form ß structure and hence to aggregate. METHODS: To elucidate the basis of these contrasting effects, we analyzed organotypic hippocampal slice cultures (OHSCs) from transgenic mice expressing the repeat domain (RD) of Tau with the anti-aggregant mutation (TauRDΔKPP) and compared them with slices containing pro-aggregant TauRDΔK...
December 4, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/29202771/selective-proliferative-response-of-microglia-to-alternative-polarization-signals
#14
Giovanna Pepe, Marcella De Maglie, Lucia Minoli, Alessandro Villa, Adriana Maggi, Elisabetta Vegeto
BACKGROUND: Microglia are resident myeloid cells of the central nervous system (CNS) that are maintained by self-renewal and actively participate in tissue homeostasis and immune defense. Under the influence of endogenous or pathological signals, microglia undertake biochemical transformations that are schematically classified as the pro-inflammatory M1 phenotype and the alternatively activated M2 state. Dysregulated proliferation of M1-activated microglia has detrimental effects, while an increased number of microglia with the alternative, pro-resolving phenotype might be beneficial in brain pathologies; however, the proliferative response of microglia to M2 signals is not yet known...
December 4, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29198708/knockdown-of-laminin-%C3%AE-5-stimulates-intestinal-cell-differentiation
#15
Manon Lepage, Amira Seltana, Marie-Pier Thibault, Éric Tremblay, Jean-François Beaulieu
Interactions between cells and the extracellular matrix regulate a wide range of cell processes such as proliferation and differentiation. Laminins are major components of the basement membrane that actively participate in most biological functions via their interactions with a variety of specific cell receptors. The α5-containing laminins (LAMA5) are one of the three main types of laminins identified at the epithelial basal lamina in the adult intestine. The aim of the present study was to investigate the role of α5-containing laminins on intestinal cell proliferation and differentiation...
November 30, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29189156/post-stroke-constraint-induced-movement-therapy-increases-functional-recovery-angiogenesis-and-neurogenesis-with-enhanced-expression-of-hif-1%C3%AE-and-vegf
#16
Ce Li, Bei Zhang, Yulian Zhu, Yingying Li, Peile Liu, Beiyao Gao, Shan Tian, Liang Du, Yu-Long Bai
BACKGROUND: Constraint-Induced Movement Therapy (CIMT) is one efficient approach to improve functional recovery after ischemic stroke. The underlying molecular mechanism remains unclear. In the current study, we investigated the effects of CIMT on angiogenesis and neurogenesis. To start linking our findings to molecular mediators, we further examined the expression of hypoxia-inducible factor-1α (HIF-1α), factor inhibiting HIF-1 (FIH-1) and vascular endothelial growth factor (VEGF)...
November 28, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/29188796/in-situ-regeneration-of-retinal-pigment-epithelium-by-gene-transfer-of-e2f2-a-potential-strategy-for-treatment-of-macular-degenerations
#17
D Kampik, M Basche, U F O Luhmann, K M Nishiguchi, J A E Williams, J Greenwood, S E Moss, H Han, S Azam, Y Duran, S J Robbie, J W B Bainbridge, D F Larkin, A J Smith, R R Ali
The retinal pigment epithelium (RPE) interacts closely with photoreceptors to maintain visual function. In degenerative diseases such as Stargardt disease and age-related macular degeneration, the leading cause of blindness in the developed world, RPE cell loss is followed by photoreceptor cell death. RPE cells can proliferate under certain conditions, suggesting an intrinsic regenerative potential, but so far this has not been utilised therapeutically. Here, we used E2F2 to induce RPE cell replication and thereby regeneration...
November 30, 2017: Gene Therapy
https://www.readbyqxmd.com/read/29185833/disruption-of-hif-1%C3%AE-enhances-cytotoxic-effects-of-metformin-in-murine-squamous-cell-carcinoma
#18
Yu Sanada, Hiroyuki Sasanuma, Shunichi Takeda, Keizo Tano, Shin-Ichiro Masunaga
Purpose In the present study, we investigated whether the disruption of the Hif-1α gene affects the sensitivity of SCC VII cells to metformin and also if metformin functions as a radiosensitizer using murine squamous cell carcinoma (SCC VII) cells. Materials and methods Cultured SCC VII and SCC VII Hif-1α-deficient cells were incubated with metformin under glucose-free and/or hypoxia-mimetic conditions and cell viabilities were measured. Tumor-bearing mice were continuously given 5-bromo-2'-deoxyuridine (BrdU) to label all proliferating cells...
November 29, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29184072/adrenomedullin-protects-leydig-cells-against-lipopolysaccharide-induced-oxidative-stress-and-inflammatory-reaction-via-mapk-nf-%C3%AE%C2%BAb-signalling-pathways
#19
Wei Hu, Lei Shi, Ming-Yong Li, Pang-Hu Zhou, Bo Qiu, Ke Yin, Hui-Hui Zhang, Yong Gao, Ran Kang, Song-Lin Qin, Jin-Zhuo Ning, Wei Wang, Li-Jun Zhang
This study aimed to explore the possible benefits of adrenomedullin (ADM) in preventing oxidative stress and inflammation by using an in vitro primary culture model of rat Leydig cells exposed to lipopolysaccharide (LPS). Cell proliferation was detected through CCK-8 and BrdU incorporation assays. ROS were determined with a DCFDA kit, and cytokine concentrations were measured with ELISA assay kits. Protein production was examined by immunohistochemical staining and Western blot, and gene expression was observed through RT-qPCR...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29176567/plasma-cell-survival-in-the-absence-of-b-cell-memory
#20
Erika Hammarlund, Archana Thomas, Ian J Amanna, Lindsay A Holden, Ov D Slayden, Byung Park, Lina Gao, Mark K Slifka
Pre-existing serum antibodies play an important role in vaccine-mediated protection against infection but the underlying mechanisms of immune memory are unclear. Clinical studies indicate that antigen-specific antibody responses can be maintained for many years, leading to theories that reactivation/differentiation of memory B cells into plasma cells is required to sustain long-term antibody production. Here, we present a decade-long study in which we demonstrate site-specific survival of bone marrow-derived plasma cells and durable antibody responses to multiple virus and vaccine antigens in rhesus macaques for years after sustained memory B cell depletion...
November 24, 2017: Nature Communications
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