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https://www.readbyqxmd.com/read/28806774/fibroblast-growth-factor-receptor-1-mediates-internalization-of-pathogenic-spotted-fever-rickettsiae-into-host-endothelium
#1
Abha Sahni, Jignesh Patel, Hema P Narra, Casey L C Schroeder, David H Walker, Sanjeev K Sahni
Rickettsial infections continue to cause serious morbidity and mortality in severe human cases around the world. Host cell adhesion and invasion is an essential requisite for intracellular growth, replication, and subsequent dissemination of pathogenic rickettsiae. Heparan sulfate proteoglycans [HSPGs] facilitate the interactions between fibroblast growth factor(s) and their tyrosine kinase receptors resulting in receptor dimerization/activation and have been implicated in bacterial adhesion to target host cells...
2017: PloS One
https://www.readbyqxmd.com/read/28806402/multi-functional-mechanisms-of-immune-evasion-by-the-streptococcal-complement-inhibitor-c5a-peptidase
#2
Nicola N Lynskey, Mark Reglinski, Damien Calay, Matthew K Siggins, Justin C Mason, Marina Botto, Shiranee Sriskandan
The complement cascade is crucial for clearance and control of invading pathogens, and as such is a key target for pathogen mediated host modulation. C3 is the central molecule of the complement cascade, and plays a vital role in opsonization of bacteria and recruitment of neutrophils to the site of infection. Streptococcal species have evolved multiple mechanisms to disrupt complement-mediated innate immunity, among which ScpA (C5a peptidase), a C5a inactivating enzyme, is widely conserved. Here we demonstrate for the first time that pyogenic streptococcal species are capable of cleaving C3, and identify C3 and C3a as novel substrates for the streptococcal ScpA, which are functionally inactivated as a result of cleavage 7 amino acids upstream of the natural C3 convertase...
August 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28804503/effects-of-angelica-extract-on-schwann-cell-proliferation-and-expressions-of-related-proteins
#3
Xiaowen Jiang, Lin Liu, Binqing Zhang, Ziyin Lu, Lu Qiao, Xinxin Feng, Wenhui Yu
The present study investigated the effects of Angelica extract (AE) on Schwann cell proliferation and expressions of related proteins, including brain derived neurotrophic factor (BDNF), neural cell adhesion molecule (NCAM), and proliferating cell nuclear antigen (PCNA). Proliferation activity and cell cycles of SCs were evaluated by MTT assay and flow cytometry methods, respectively, after 12 h treatment of AE at different concentrations (62.5, 125, 250, 1000, 2000, 4000, and 8000 mg/L). SCs were treated by 500, 1000, and 2000 mg/L AE for 24 h or 48 h; the related genes mRNA and proteins expressions in SCs were detected by quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA) kit...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28802579/atorvastatin-prevents-endothelial-dysfunction-in-high-glucose-condition-through-skp2-mediated-degradation-of-foxo1-and-icam-1
#4
Jonghanne Park, Injoo Hwang, Sung-Jean Kim, Seock-Won Youn, Jin Hur, Hyo-Soo Kim
OBJECTIVE: The 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor atorvastatin has been reported to exert vasculo-protective action in diabetes. We investigated the vasculo-protective mechanism of atorvastatin by evaluating its effect on two major pathogenic molecules, FOXO1 and ICAM1, mediated by S-phase kinase-associated protein 2 (Skp2) in diabetic endothelial dysfunction. APPROACH AND RESULTS: [1] FOXO1: Hyperglycemic condition increased FOXO1 protein level in endothelial cells, which was reversed by atorvastatin...
August 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28800973/critical-evaluation-of-dipolar-acid-base-and-charge-interactions-i-electron-displacement-within-and-between-molecules-liquids-and-semiconductors
#5
REVIEW
Jarl B Rosenholm
Specific dipolar, acid-base and charge interactions involve electron displacements. For atoms, single bonds and molecules electron displacement is characterized by electronic potential, absolute hardness, electronegativity and electron gap. In addition, dissociation, bonding, atomization, formation, ionization, affinity and lattice enthalpies are required to quantify the electron displacement in solids. Semiconductors are characterized by valence and conduction band energies, electron gaps and average Fermi energies which in turn determine Galvani potentials of the bulk, space charge layer and surface states...
June 21, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28800767/cell-adhesion-heterogeneity-reinforces-tumour-cell-dissemination-novel-insights-from-a-mathematical-model
#6
David Reher, Barbara Klink, Andreas Deutsch, Anja Voss-Böhme
BACKGROUND: Cancer cell invasion, dissemination, and metastasis have been linked to an epithelial-mesenchymal transition (EMT) of individual tumour cells. During EMT, adhesion molecules like E-cadherin are downregulated and the decrease of cell-cell adhesion allows tumour cells to dissociate from the primary tumour mass. This complex process depends on intracellular cues that are subject to genetic and epigenetic variability, as well as extrinsic cues from the local environment resulting in a spatial heterogeneity in the adhesive phenotype of individual tumour cells...
August 11, 2017: Biology Direct
https://www.readbyqxmd.com/read/28800609/the-trypomastigote-small-surface-antigen-tssa-regulates-trypanosoma-cruzi-infectivity-and-differentiation
#7
María de Los Milagros Cámara, Gaspar E Cánepa, Andrés B Lantos, Virginia Balouz, Hai Yu, Xi Chen, Oscar Campetella, Juan Mucci, Carlos A Buscaglia
BACKGROUND: TSSA (Trypomastigote Small Surface Antigen) is an antigenic, adhesion molecule displayed on the surface of Trypanosoma cruzi trypomastigotes. TSSA displays substantial sequence identity to members of the TcMUC gene family, which code for the trypomastigote mucins (tGPI-mucins). In addition, TSSA bears sequence polymorphisms among parasite strains; and two TSSA variants expressed as recombinant molecules (termed TSSA-CL and TSSA-Sy) were shown to exhibit contrasting features in their host cell binding and signaling properties...
August 11, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28800320/ensemble-methods-integrated-with-mirna-expression-data-for-predicting-mirna-targets-in-stomach-adenocarcinoma
#8
Guang-Wei Liu, Zhao-Min Qin, Qin-Hai Shen
OBJECTIVE: It is crucially important to discover the relationships between genes and microRNAs (miRNAs) in cancer. Thus, we proposed a combined bioinformatics method integrating Pearson's correlation coefficient (PCC), Lasso, and causal inference method (IDA) to identify the potential miRNA targets for stomach adenocarcinoma (STAD) using Borda count election. MATERIALS AND METHODS: Firstly, the ensemble method integrating PCC, IDA, and Lasso was used to predict miRNA targets...
July 31, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28800317/identification-of-prostate-cancer-hub-genes-and-therapeutic-agents-using-bioinformatics-approach
#9
Enhao Fang, Xiuqing Zhang, Qi Wang, Daoming Wang
BACKGROUND: Prostate cancer (PCa) is the most common and the second leading cause of cancer-related death among men in America. As the molecular mechanism of PCa has not yet been completely discovered, identification of hub genes and potential drug of this disease is an important area of research that could provide new insights into exploring the mechanisms underlying PCa. OBJECTIVE: The aim of this study was to identify potential biomarkers and novel drug for prostate cancer treatment...
July 30, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28798776/protective-effects-of-chronic-intermittent-hypobaric-hypoxia-pretreatment-against-aplastic-anemia-through-improving-the-adhesiveness-and-stress-of-mesenchymal-stem-cells-in-rats
#10
Jing Yang, Li Zhang, Handong Wang, Zan Guo, Yixian Liu, Yi Zhang, Chuan Wang, Quanhai Li
Aplastic anemia (AA) is a common malignant blood disease, and chronic intermittent hypobaric hypoxia (CIHH) has a beneficial effect against different diseases. The aim of the present study was to investigate the protective effect of CIHH against AA and underlying mechanisms. 5-Fluorouracil and busulfan treatment induced AA model in rats with reduction of hematological parameters and bone marrow tissue injury and decrease of the colony numbers of progenitor cells. CIHH pretreatment significantly reduced the incidence rate of AA and alleviated above symptoms in AA model...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28798065/self-organization-process-in-newborn-skin-organoid-formation-inspires-strategy-to-restore-hair-regeneration-of-adult-cells
#11
Mingxing Lei, Linus J Schumacher, Yung-Chih Lai, Wen-Tau Juan, Chao-Yuan Yeh, Ping Wu, Ting-Xin Jiang, Ruth E Baker, Randall Bruce Widelitz, Li Yang, Cheng-Ming Chuong
Organoids made from dissociated progenitor cells undergo tissue-like organization. This in vitro self-organization process is not identical to embryonic organ formation, but it achieves a similar phenotype in vivo. This implies genetic codes do not specify morphology directly; instead, complex tissue architectures may be achieved through several intermediate layers of cross talk between genetic information and biophysical processes. Here we use newborn and adult skin organoids for analyses. Dissociated cells from newborn mouse skin form hair primordia-bearing organoids that grow hairs robustly in vivo after transplantation to nude mice...
August 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28797776/increase-in-seizure-susceptibility-in-sepsis-like-condition-explained-by-spiking-cytokines-and-altered-adhesion-molecules-level-with-impaired-blood-brain-barrier-integrity-in-experimental-model-of-rats-treated-with-lipopolysaccharides
#12
Rakesh K Sewal, Manish Modi, Uma Nahar Saikia, Amitava Chakrabarti, Bikash Medhi
BACKGROUND AND OBJECTIVE: Epilepsy is a neurological disorder characterized by recurrent unprovoked seizures. Sepsis is a condition which initiates a cascade of a surge of inflammatory mediators. Interplay between seizures and inflammation other than of brain origin is yet to be explored. The present study was designed to evaluate the seizure susceptibility in experimental models of lipopolysaccharide (LPS) induced sepsis. DESIGN AND METHODS: Experimental sepsis was induced using lipopolysaccharides in Wistar rats...
June 15, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28797761/tail-vein-injection-of-mmldl-upregulates-mouse-mesenteric-artery-etb-receptors-via-activation-of-the-erk1-2-pathway
#13
Yang Liu, Xiao-Lan Chen, Cang-Bao Xu, Lei Cao, Jie Lin, Gen Chen, Jie Li
Minimally modified low density lipoprotein (mmLDL) is a risk factor for cardiovascular disease. This study investigated the effect of mmLDL on mouse mesenteric artery endothelin type B (ETB) receptors and its molecular mechanism. Mice were injected with normal saline (NS group), mmLDL in the tail vein (mmLDL group), or with both mmLDL and an intraperitoneal injection of the ERK1/2 pathway-specific inhibitor U0126 (mmLDL+U0126 group). The dose-response curve of mesenteric artery contraction induced by sarafotoxin 6c (S6c), the ETB receptor agonist, was measured using a sensitive myograph system...
August 7, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28797257/identification-of-key-lncrnas-in-colorectal-cancer-progression-based-on-associated-protein-protein-interaction-analysis
#14
Haishan Zhu, Jiajing Yu, Haifeng Zhu, Yusheng Guo, Shengjie Feng
BACKGROUND: Colorectal cancer (CRC) was one of the most commonly diagnosed malignancies. The molecular mechanisms involved in the progression of CRC remain unclear. Accumulating evidences showed that long noncoding RNAs (lncRNAs) played key roles in tumorigenesis, cancer progression, and metastasis. Therefore, we aimed to explore the roles of lncRNAs in the progression of CRC. METHODS: In this study, we aimed to identify differentially expressed lncRNAs and messenger RNAs (mRNAs) in CRC by analyzing a cohort of previously published datasets: GSE64857...
August 10, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28797215/the-cadm2-gene-is-associated-with-processing-speed-performance-evidence-among-elderly-with-type-2-diabetes
#15
Lior Greenbaum, Ramit Ravona-Springer, Abigail Livny, Shahar Shelly, Inbal Sharvit-Ginon, Ithamar Ganmore, Anna Alkelai, Anthony Heymann, Michal Schnaider Beeri
OBJECTIVES: Recent large scale meta-analysis of genome wide association studies (GWAS) from multiple cohorts, demonstrated the association of the single nucleotide polymorphism (SNP) rs17518584, with processing speed (measured by the Digit Symbol Substitution Task (DSST) or the Letter Digit Substitution Test (LDST)), at GWAS significance level. This SNP is located within the cell adhesion molecule 2 (CADM2) gene. We aimed to validate this finding in our sample of 944 cognitively normal Jewish elderly individuals with type 2 diabetes (T2D), a population which is at risk for cognitive decline and dementia...
August 11, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28796813/a-novel-organotypic-3d-sweat-gland-model-with-physiological-functionality
#16
Patricia Klaka, Sabine Grüdl, Bernhard Banowski, Melanie Giesen, Andrea Sättler, Peter Proksch, Thomas Welss, Thomas Förster
Dysregulated human eccrine sweat glands can negatively impact the quality-of-life of people suffering from disorders like hyperhidrosis. Inability of sweating can even result in serious health effects in humans affected by anhidrosis. The underlying mechanisms must be elucidated and a reliable in vitro test system for drug screening must be developed. Here we describe a novel organotypic three-dimensional (3D) sweat gland model made of primary human eccrine sweat gland cells. Initial experiments revealed that eccrine sweat gland cells in a two-dimensional (2D) culture lose typical physiological markers...
2017: PloS One
https://www.readbyqxmd.com/read/28796473/multifunctional-%C3%AE-v%C3%AE-6-integrin-specific-peptide-pt-iv-conjugates-for-cancer-cell-targeting
#17
Anne C Conibear, Sonja Hager, Josef Mayr, Matthias H M Klose, Bernhard K Keppler, Christian R Kowol, Petra Heffeter, Christian F W Becker
Increasing the specificity of cancer therapy, and thereby decreasing damage to normal cells, requires targeting to cancer-cell specific features. The αvβ6 integrin is a receptor involved in cell adhesion and is frequently up-regulated in cancer cells compared to normal cells. We have selected a peptide ligand reported to bind specifically to the β6 integrin and have synthesized a suite of multispecific molecules to explore the potential for targeting of cancer cells. A combination of solid-phase peptide synthesis and chemoselective ligations was used to synthesize multifunctional molecules composed of integrin-targeting peptides, cytotoxic platinum(IV) prodrugs, and fluorescent or affinity probes joined with flexible linkers...
August 10, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28796414/genetic-variants-in-the-metzincin-metallopeptidase-family-genes-predict-melanoma-survival
#18
Yinghui Xu, Yanru Wang, Hongliang Liu, Qiong Shi, Dakai Zhu, Christopher I Amos, Shenying Fang, Jeffrey E Lee, Terry Hyslop, Xin Li, Jiali Han, Qingyi Wei
Metzincins are key molecules in the degradation of the extracellular matrix and play an important role in cellular processes such as cell migration, adhesion, and cell fusion of malignant tumors, including cutaneous melanoma (CM). We hypothesized that genetic variants of the metzincin metallopeptidase family genes would be associated with CM-specific survival (CMSS). To test this hypothesis, we first performed Cox proportional hazards regression analysis to evaluate the associations between genetic variants of 75 metzincin metallopeptidase family genes and CMSS using the dataset from the genome-wide association study (GWAS) from The University of Texas MD Anderson cancer Center (MDACC) which included 858 non-Hispanic white patients with CM, and then validated in the dataset from the Harvard GWAS study which had 409 non-Hispanic white patients with invasive CM...
August 10, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28796044/clinical-significance-of-costimulatory-molecules-cd40-cd40l-and-cd134-cd134l-in-coronary-heart-disease-a-case-control-study
#19
Jun Chen, Jian-Hao Li, Shan-Jun Zhao, Da-Yu Wang, Wen-Zhu Zhang, Wei-Jie Liang
The aim of the study was to evaluate the potential role of CD40/CD40 ligand (CD40L) and CD134/CD134 ligand (CD134L) in the development of coronary heart disease (CHD) via the performance of a case-control study.The research objects were 234 cases of CHD patients and 120 cases of well-matched normal controls. Following the separation of peripheral blood mononuclear cells (PBMCs), real-time quantitative PCR (qRT-PCR), Western blot, immunohistochemistry, and flow cytometry were applied for the detection of mRNA levels and expression levels of CD40/CD40L and CD134/CD134L; meanwhile, intercellular adhesion molecule-1 (ICAM-1) and Fas protein mRNA levels were detected using qRT-PCR...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28795875/animal-models-for-studying-epithelial-barriers-in-neonatal-necrotizing-enterocolitis-inflammatory-bowel-disease-and-colorectal-cancer
#20
Tiaosi Xing, Rolando Camacho Salazar, Yan-Hua Chen
The intestinal epithelial cells line the luminal surface of the entire gastrointestinal tract which is crucial for the absorption of nutrients and prevention of pathogens entering from the external environment. The epithelial barrier plays an important role in organ development, disease pathogenesis, and aging. The major component of an epithelial barrier is the single columnar epithelium and tight junctions. Tight junctions are located at the most apical region of the junctional complex and contain many integral membrane proteins, such as occludin, the claudin family, and junctional adhesion molecules (JAMs)...
July 20, 2017: Tissue Barriers
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