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https://www.readbyqxmd.com/read/29458137/bisphenol-a-alters-oocyte-maturation-by-prematurely-closing-gap-junctions-in-the-cumulus-cell-oocyte-complex
#1
Deyanira Guadalupe Acuña-Hernández, Laura Arreola-Mendoza, Ramsés Santacruz-Márquez, Sihomara Patricia García-Zepeda, Lyda Yuliana Parra-Forero, Jesús Alberto Olivares-Reyes, Isabel Hernández-Ochoa
In ovarian follicles, cumulus cells communicate with the oocyte through gap junction intercellular communication (GJIC), to nurture the oocyte and control its meiosis arrest and division. Bisphenol A (BPA) is a monomer found in polycarbonate-made containers that can induce functional alterations, including impaired oocyte meiotic division and reduced molecule transfer in GJIC. However, how BPA alters oocyte meiotic division is unclear. We investigated whether BPA effects on oocyte meiotic division were correlated with reduced transfer in GJIC...
February 16, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29457853/mesenchymal-epithelial-transition-of-pancreatic-cancer-cells-at-perineural-invasion-sites-is-induced-by-schwann-cells
#2
Yoko Fujii-Nishimura, Ken Yamazaki, Yohei Masugi, Junya Douguchi, Yutaka Kurebayashi, Naoto Kubota, Hidenori Ojima, Minoru Kitago, Masahiro Shinoda, Akinori Hashiguchi, Michiie Sakamoto
Epithelial-mesenchymal transition (EMT) promotes invasion and metastasis of pancreatic ductal adenocarcinoma (PDAC). However, the importance of its reverse process, mesenchymal-epithelial transition (MET), for PDAC remains unclear. We aimed to characterize the histological finding "focal differentiation" in PDAC at perineural invasion sites in the context of MET and to investigate the role of Schwann cells in inducing tumor MET. Tumor differentiation and immunohistochemical expressions of E-cadherin, SMAD3, and vimentin at perineural invasion sites were examined in 168 PDAC tissues...
February 19, 2018: Pathology International
https://www.readbyqxmd.com/read/29457838/bax-inhibitor-1-protects-from-non-alcoholic-steatohepatitis-by-limiting-ire1%C3%AE-signaling
#3
Cynthia Lebeaupin, Déborah Vallée, Déborah Rousseau, Stéphanie Patouraux, Stéphanie Bonnafous, Gilbert Adam, Frederic Luciano, Carmelo Luci, Rodolphe Anty, Antonio Iannelli, Sandrine Marchetti, Guido Kroemer, Sandra Lacas-Gervais, Albert Tran, Philippe Gual, Béatrice Bailly-Maitre
Endoplasmic reticulum (ER) stress is activated in non-alcoholic fatty liver disease (NAFLD), raising the possibility that ER stress-dependent metabolic dysfunction, inflammation and cell death underlie the transition from steatosis to steatohepatitis (NASH). Bax inhibitor-1 (BI-1), a negative regulator of the ER stress sensor IRE1α, has yet to be explored in NAFLD as a hepatoprotective agent. We hypothesized that the genetic ablation of BI-1 would render the liver vulnerable to NASH due to unrestrained IRE1α signaling...
February 19, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29457172/inorganic-mixed-phase-templated-by-a-fatty-acid-monolayer-at-the-air-water-interface-the-mn-and-mg-case
#4
Alae El Haitami, Michel Goldmann, Philippe Fontaine, Marie-Claude Fauré, Sophie Cantin
We studied by means of Grazing Incidence X-ray Diffraction (GIXD) coupled with X-ray fluorescence spectroscopy the structure of a behenic acid monolayer spread at the surface of Mg2+ /Mn2+ mixed aqueous solutions. For the pure Mg2+ and Mn2+ aqueous solutions, the cations induce at the surface different 2D lattice superstructures of the organic monolayer. These superstructures correspond to an inorganic organized monolayer anchored to the hydrophilic group of the ordered behenic acid monolayer. Among the various diffraction peaks, we focused on those characteristics of the behenic acid oblique cell...
February 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29456864/curative-gnrha-treatment-has-an-unexpected-repressive-effect-on-sertoli-cell-specific-genes
#5
Katharina Gegenschatz-Schmid, Gilvydas Verkauskas, Philippe Demougin, Vytautas Bilius, Darius Dasevicius, Michael B Stadler, Faruk Hadziselimovic
Background: Follicle stimulating hormone and testosterone stimulate Sertoli cells to support germ cell function and differentiation. During mini-puberty, when gonadotropin (GnRH) stimulates increases in plasma luteinizing hormone (LH) and testosterone levels, gonocytes are transformed into Ad spermatogonia. In cryptorchidism, impaired gonadotropin secretion during mini-puberty results in insufficient LH and testosterone secretion, impaired gonocyte transition to Ad spermatogonia, and perturbed Sertoli cell proliferation...
2018: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/29456735/metadherin-contributes-to-epithelial-mesenchymal-transition-and-paclitaxel-resistance-induced-by-acidic-extracellular-ph-in-nasopharyngeal-carcinoma
#6
Changyun Yu, Yong Liu, Zhaobing Qin
Paclitaxel resistance is a challenge to the treatment of nasopharyngeal carcinoma (NPC). An acidic extracellular pH (pHe ), a hallmark of solid tumors, is demonstrated to decrease the efficacy of chemotherapy. However, the precise function of acidic pHe in mediating chemotherapy in NPC remains unknown. In the present study, acidic pHe significantly decreased the cytotoxicity of paclitaxel in NPC cells. In addition, epithelial-mesenchymal transition (EMT)-like changes were observed in NPC cells cultured at acidic pHe ...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29456733/fbxw7-regulates-renal-cell-carcinoma-migration-and-invasion-via-suppression-of-the-epithelial-mesenchymal-transition
#7
Hongchao He, Jun Dai, Zhaoping Xu, Wei He, Xiaojing Wang, Yu Zhu, Haofei Wang
F-box and WD repeat domain containing 7 (Fbxw7) is an F-box protein that belongs to the SKP1-CUL1-F-box protein E3 ligase complex and is responsible for transferring the ubiquitin molecule to the substrate, which results in its recognition and subsequent degradation by proteasomes. Furthermore, it can identify a network of signaling proteins that function in cell growth, diversion and apoptosis. In the present study, Fbxw7 was downregulated in renal cell carcinoma (RCC) tissues compared with the adjacent non-tumor tissues and its expression was significantly associated with the tumor-node-metastasis stage, lymph node metastasis and distant metastasis in patients with RCC...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29456714/foxk1-promotes-glioblastoma-proliferation-and-metastasis-through-activation-of-snail-transcription
#8
Haitao Xu, Shulan Huang, Xiaonan Zhu, Wangcheng Zhang, Xiangyang Zhang
Forkhead box K1 (FOXK1) has been identified to have a crucial function in development and oncogenesis. However, its role in glioblastoma has remained largely elusive and was therefore assessed in the present study. In human glioblastoma multiforme (GBM) tissue samples, FOXK1 was determined to be highly expressed compared with adjacent normal tissue samples. In addition, high levels of FOXK1 were detected in the T98G and LN18 GBM cell lines as compare with those in normal human astrocytes. Of note, high expression of FOXK1 was revealed to be associated with metastasis and tumor size...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456688/overexpression-of-microrna-506-3p-aggravates-the-injury-of-vascular-endothelial-cells-in-patients-with-hypertension-by-downregulating-beclin1-expression
#9
Fanfan Yi, Yugui Hao, Xiaoyi Chong, Wei Zhong
The aim of the present study was to measure the expression of microRNA (miRNA)-506-3p in the peripheral blood of patients with hypertension and to determine the biological functions and mechanisms of action of miR-506-3p. A total of 61 patients with primary hypertension were included in the present study. Peripheral blood was collected from all patients, as well as 31 healthy subjects who were included in a control group. The expression of miR-506-3p in peripheral blood was determined by reverse transcription-quantitative polymerase chain reaction...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456686/biochanin-a-extirpates-the-epithelial-mesenchymal-transition-in-a-human-lung-cancer
#10
Yan Wang, Jiao-Jiao Li, Yu-Min Chen
The natural iso-flavonoid, biochanin A, is categorized as a phytoestrogen and has been demonstrated to exhibit various pharmacological properties. However, no effects of biochanin A on lung cancer cell lines have been reported. Therefore, the present study aimed to demonstrate whether biochanin A has the ability to reduce lung cancer triggered pro-inflammatory effects from leukemic monocytes. We studied the release of cytokines, tumor necrosis factor (TNF)-α and interleukin (IL)-6, from the cocultured cells of A427:AML-193...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456682/l1cam-promotes-epithelial-to-mesenchymal-transition-and-formation-of-cancer-initiating-cells-in-human-endometrial-cancer
#11
Jinlong Chen, Fufeng Gao, Naifu Liu
Identification of novel factors critical for epithelial to mesenchymal transition (EMT) and cancer initiating cell (CIC) formation may aid in the identification of novel therapeutics for the treatment of endometrial cancer. The present study demonstrated that L1 cell adhesion molecule (CAM) is critical for EMT and formation of CICs in endometrial cancer. Overexpression of L1CAM may promote EMT with increased formation of CICs in HEC-1A endometrial cancer cells. CICs and mesenchymal status resist chemotherapeutic drugs and may regenerate the various cell types in tumors, thereby resulting in relapse of the disease...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29456184/quantified-f-actin-morphology-is-predictive-of-phagocytic-capacity-of-stem-cell-derived-retinal-pigment-epithelium
#12
Claudia Müller, Carol Charniga, Sally Temple, Silvia C Finnemann
With stem cell-derived retinal pigment epithelial (RPE) replacement therapies in clinical testing, establishing potency of RPE prior to transplantation is imperative. Phagocytosis of photoreceptor outer segment fragments (POS) is a key indicator of RPE functionality. Comparing RPE derived from different donor human adult RPE stem cell lines, we found that cells were either high-phagocytic or low-phagocytic despite sharing phagocytic receptors and ligands, junctional ZO-1, and lack of epithelial-mesenchymal transition...
February 9, 2018: Stem Cell Reports
https://www.readbyqxmd.com/read/29456180/ras-regulates-the-transition-from-naive-to-primed-pluripotent-stem-cells
#13
Anna Altshuler, Mila Verbuk, Swarnabh Bhattacharya, Ifat Abramovich, Roni Haklai, Jacob H Hanna, Yoel Kloog, Eyal Gottlieb, Ruby Shalom-Feuerstein
The transition from naive to primed state of pluripotent stem cells is hallmarked by epithelial-mesenchymal transition, metabolic switch from oxidative phosphorylation to aerobic glycolysis, and changes in the epigenetic landscape. Since these changes are also seen as putative hallmarks of neoplastic cell transformation, we hypothesized that oncogenic pathways may be involved in this process. We report that the activity of RAS is repressed in the naive state of mouse embryonic stem cells (ESCs) and that all three RAS isoforms are significantly activated upon early differentiation induced by LIF withdrawal, embryoid body formation, or transition to the primed state...
February 8, 2018: Stem Cell Reports
https://www.readbyqxmd.com/read/29456083/placeholder-nucleosomes-underlie-germline-to-embryo-dna-methylation-reprogramming
#14
Patrick J Murphy, Shan Fu Wu, Cody R James, Candice L Wike, Bradley R Cairns
The fate and function of epigenetic marks during the germline-to-embryo transition is a key issue in developmental biology, with relevance to stem cell programming and transgenerational inheritance. In zebrafish, DNA methylation patterns are programmed in transcriptionally quiescent cleavage embryos; paternally inherited patterns are maintained, whereas maternal patterns are reprogrammed to match the paternal. Here, we provide the mechanism by demonstrating that "Placeholder" nucleosomes, containing histone H2A variant H2A...
February 9, 2018: Cell
https://www.readbyqxmd.com/read/29456001/soluble-soybean-polysaccharide-tio-2-bionanocomposite-film-for-food-application
#15
Davoud Salarbashi, Mohsen Tafaghodi, Bibi Sedigheh Fazly Bazzaz
In the current study, a set of biodegradable soybean polysaccharide (SSPS) nanocomposites containing different ratios of TiO2 nanoparticles was characterized as new packaging system. X-ray diffraction (XRD) measurement showed that the crystalline structure of the TiO2 nanoparticles remained intact in the polysaccharide matrix and the surface of nanocomposites containing 1-3% TiO2 was observed morphologically uniform under scanning electron microscopy (SEM). Dynamic mechanical thermal analysis revealed that the magnitude of storage modulus was 3...
April 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29455593/acute-compressive-stress-activates-rho-rock-mediated-cellular-processes
#16
Sarah T Boyle, Jasreen Kular, Max Nobis, Andrew Ruszkiewicz, Paul Timpson, Michael S Samuel
The ability to rapidly respond to applied force underpins cell/tissue homeostasis. This response is mediated by mechanotransduction pathways that regulate remodeling and tension of the actomyosin cytoskeleton to counterbalance external forces. Enhanced extracellular matrix tension hyper-activates mechanotransduction and characterizes diseased states such as cancer, but is also required for normal epidermal regeneration. While the impact of extracellular matrix tension on signaling and cell biology are well appreciated, that of acute compressive force is under-studied...
February 17, 2018: Small GTPases
https://www.readbyqxmd.com/read/29455395/anti-cancer-effect-of-aquaporin-5-silencing-in-colorectal-cancer-cells-in-association-with-inhibition-of-wnt-%C3%AE-catenin-pathway
#17
Wei Wang, Qing Li, Tao Yang, Dongsheng Li, Feng Ding, Hongzhi Sun, Guang Bai
Aquaporin 5 (AQP5) is a water channel protein that is over-expressed in many tumors. Elevated expression of AQP5 is associated with poor prognosis of colorectal cancer. Yet, whether AQP5 plays a role in epithelial-mesenchymal transition (EMT) of colorectal cancer has not been reported until now. Here we aim to investigate the function of AQP5 in the EMT process of colorectal cancer. We transfected HCT116 and SW480 cells with AQP5-specific shRNA and verified the knockdown efficiency through western blotting and real-time PCR...
February 17, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29455333/stress-response-factors-drive-regrowth-of-quiescent-cells
#18
REVIEW
Zheng Kuang, Hongkai Ji, Jef D Boeke
Quiescent cells exploit an array of transcription factors to activate stress response machinery and maintain survival under nutrient-limited conditions. Our recent findings reveal that these transcription factors also play an important role in the exit of quiescence and regrowth. By studying Saccharomyces cerevisiae under a continuous, nutrient-limited condition, we found that Msn2 and Msn4 function as master regulators of glycolytic genes in the quiescent-like phase. They control the timing of transition from quiescence to growth by regulating the accumulation rate of acetyl-CoA, a key metabolite that is downstream of glycolysis and drives growth...
February 17, 2018: Current Genetics
https://www.readbyqxmd.com/read/29455091/an-uplc-ms-ms-method-to-determine-ct-707-and-its-two-metabolites-in-plasma-of-alk-positive-advanced-non-small-cell-lung-cancer-patients
#19
Cheng Cui, Pei Hu, Ji Jiang, Fansheng Kong, Hong Luo, Qian Zhao
CT-707, a mutant-selective inhibitor of an important cancer target, anaplastic lymphoma kinase (ALK), is designed to be a targeted therapeutic agent for non-small cell lung cancer (NSCLC) patients harboring ALK active and crizotinib resistant mutations. A rapid and sensitive ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed and validated for the determination of CT-707 and its two metabolites (M1 and M2) in human plasma. The samples were purified by solid phase extraction (SPE) and separated on a BEH C18 column (2...
January 31, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29454802/vangl2-is-essential-for-myocardial-remodeling-activated-by-wnt-jnk-signaling
#20
Peng Zhang, Chunxiao Hu, Yongyong Li, Ying Wang, Lei Gao, Kai Lu, Guanglei Chang, Yong Li, Shu Qin, Dongying Zhang
The Wnt/JNK pathway, responsible for tissue polarity in cardiogenesis in vertebrates, has been shown to play numerous roles during differentiation and development of cardiac myocytes. Van Gogh-like-2 (Vangl2) is a core component that regulates the induction of polarized cellular and tissue morphology during animal development. However, little is known about Wnt/JNK signaling pathway in the process of myocardial remodeling. In present study, we found that activation of Wnt/JNK signaling by Wnt5a stimulates enlargement of cardiomyocyte surface area...
February 15, 2018: Experimental Cell Research
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