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https://www.readbyqxmd.com/read/29220778/quantitative-assessment-of-naegleria-fowleri-and-fecal-indicator-bacteria-in-brackish-water-of-lake-pontchartrain-louisiana
#1
Jia Xue, Frederica G Lamar, Bowen Zhang, Siyu Lin, Jennifer G Lamori, Samendra P Sherchan
Brackish water samples from Lake Pontchartrain in Louisiana were assessed for the presence of pathogenic amoeba Naegleria fowleri, which causes primary amoebic meningoencephalitis (PAM). In our study, quantitative polymerase chain reaction (qPCR) methods were used to determine N. fowleri, E. coli, and enterococci in water collected from Lake Pontchartrain. N. fowleri target sequence was detected in 35.4% (56/158) of the water samples from ten sites around the lake. Statistically significant positive correlations between N...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29220656/mpk1-slt2-links-multiple-stress-responses-with-gene-expression-in-budding-yeast-by-phosphorylating-tyr1-of-the-rnap-ii-ctd
#2
Nathan Yurko, Xiaochuan Liu, Takashi Yamazaki, Mainul Hoque, Bin Tian, James L Manley
The RNA polymerase II largest subunit C-terminal domain consists of repeated YSPTSPS heptapeptides. The role of tyrosine-1 (Tyr1) remains incompletely understood, as, for example, mutating all Tyr1 residues to Phe (Y1F) is lethal in vertebrates but a related mutant has only a mild phenotype in S. pombe. Here we show that Y1F substitution in budding yeast resulted in a strong slow-growth phenotype. The Y1F strain was also hypersensitive to several different cellular stresses that involve MAP kinase signaling...
December 7, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29220592/different-loci-and-mrna-copy-number-of-the-increased-serum-survival-gene-of-escherichia-coli
#3
Wang-Ye Xu, Yijing Li, Chen Fan
The increased serum survival gene (iss) has been identified as a virulence trait associated with the virulence of Escherichia coli, causing colibacillosis in poultry. However, it remains unclear as to whether iss mRNA copy number and sequence affect the virulence. To examine these influences, we assessed the presence of iss, sequence analysis, iss mRNA copy number, and serum resistance. iss was detected in (all) 88 E. coli isolates from different sources, and sequencing identified 16 alleles (32 different loci) and 10 amino acid sequences (10 different loci)...
December 8, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29220288/contemporary-sarcoma-diagnosis-genetics-and-genomics
#4
Inga-Marie Schaefer, Gregory M Cote, Jason L Hornick
Sarcomas include diverse mesenchymal neoplasms with widely varied prognosis, clinical behavior, and treatment. Owing to their rarity and histologic overlap, accurate diagnosis of sarcomas can be challenging. Our approach has evolved dramatically in the past few decades, where novel insights into the molecular pathogenetic basis for sarcomas has dramatically (re)shaped contemporary diagnosis, building on a largely morphology- and clinical presentation-based strategy. Examples include the introduction of novel immunohistochemical markers that serve as surrogates for molecular genetic alterations and identification of characteristic molecular alterations...
December 8, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/29218572/complete-genome-sequence-of-a-new-strain-of-lagenaria-siceraria-endornavirus-from-china
#5
Xiaoqin Peng, Hui Pan, Arif Muhammad, Hongliu An, Shouguo Fang, Weimin Li, Songbai Zhang
An RNA virus tentatively named Lagenaria siceraria endornavirus-Hubei (LsEV-HuB) was isolated from Lagenaria siceraria var. hispida in Hubei, China. The LsEV-HuB genome consists of 15,098 bp and contains a single open reading frame (ORF) encoding a large protein with several conserved domains, including one helicase domain, one glycosyltransferase domain, two capsular polysaccharide synthesis protein (CPS) domains, and one RNA-dependent RNA polymerase (RdRp) domain. LsEV-HuB has nucleotide and amino acid sequence identities of 72...
December 7, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29218486/interaction-study-between-hcv-ns5a-d2-and-ns5b-using-19f-nmr
#6
Marie Dujardin, François-Xavier Cantrelle, Guy Lippens, Xavier Hanoulle
The non structural protein 5A (NS5A) regulates the replication of the hepatitis C viral RNA through a direct molecular interaction of its domain 2 (NS5A-D2) with the RNA dependent RNA polymerase NS5B. Because of conflicting data in the literature, we study here this molecular interaction using fluorinated versions of the NS5A-D2 protein derived from the JFH1 Hepatitis C Virus strain. Two methods to prepare fluorine-labelled NS5A-D2 involving the biosynthetic incorporation of a 19F-tryptophan using 5-fluoroindole and the posttranslational introduction of fluorine by chemical conjugation of 2-iodo-N-(trifluoromethyl)acetamide with the NS5A-D2 cysteine side chains are presented...
December 7, 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/29218443/prevalence-and-associated-risk-factors-of-giardia-duodenalis-infection-among-school-going-children-in-nepal
#7
Sarmila Tandukar, Jeevan B Sherchand, Jia Xue, Sital Uprety, Samendra P Sherchan, Dinesh Bhandari, Bikash Malla, Rajani Ghaju Shrestha, Laxmi Parajuli, Shristi Poudel, Ashmita Dhital, Eiji Haramoto
This study aimed to determine the prevalence of intestinal parasites and its associated risk factors among school-going children in Kathmandu, Nepal. Between August and September 2016, a total of 333 stool samples were collected from children at five public schools. The collected samples were subjected to formol-ether concentration, followed by conventional microscopic examination for intestinal parasites. The overall prevalence of intestinal parasites was 24.3% (81/333), with Giardia spp. showing the highest prevalence of 18...
December 7, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29218243/elevated-hbxip-expression-is-associated-with-aggressive-phenotype-and-poor-prognosis-in-esophageal-squamous-cell-carcinoma
#8
Honggang Xia, Lan Ma, Jing Li, Hongyu Bai, Dongbin Wang
The oncoprotein hepatitis B virus X-interacting protein (HBXIP) has been suggested to play an essential role in several malignancies. However, the clinicopathological significance and prognostic value of HBXIP expression in esophageal squamous cell carcinoma (ESCC) is still unknown. Therefore the aim of this study was to characterize HBXIP expression and its prognostic value in ESCC. Quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot were performed to assess the mRNA and protein expression of HBXIP in ESCC tissues and cell lines...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29218124/expression-of-toll-like-receptor-2-and-4-in-peripheral-blood-neutrophil-cells-from-patients-with-chronic-obstructive-pulmonary-disease
#9
Prashant Mani Tripathi, Surya Kant, Ravi Shanker Yadav, Ram Awadh Singh Kushwaha, Ved Prakash, Sayed Husian Mustafa Rizvi, Arshiya Parveen, Abbas Ali Mahdi, Iqbal Ahmad
Objectives: Chronic obstructive pulmonary disease (COPD) is one of the leading causes of morbidity and mortality around the world. Preliminary studies have evaluated the association between innate immunity including Toll-like receptors (TLRs) and airway samples of patients with COPD. The role of TLRs in peripheral blood neutrophils is poorly understood. Hence, this study aimed to investigate the role of TLR2 and TLR4 in peripheral blood neutrophils of COPD patients. Methods: A total of 101 COPD cases and an equal number of healthy controls participated in this case-control study...
November 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/29218114/comparative-transcriptome-analysis-of-the-global-circular-rnas-expression-profiles-between-shee-and-sheec-cell-lines
#10
Jiachun Sun, Xiaozhi Yuan, Xiangming Li, Dengkui Wang, Tanyou Shan, Wei Wang, Qiuyan Wan, Xinshuai Wang, Junqiang Yan, Shegan Gao
Esophageal squamous cell carcinoma (ESCC) is widely regarded as one of the most lethal types of cancer around the world. The fact that early detection of ESCC could dramatically improve the treatment outcome of the patients has sparked considerable interest in searching for reliable and accurate diagnostic biomarkers. Recently, circular RNAs (circRNA) have emerged as a new type of non-coding RNAs with significant RNase resistance, wide abundance and remarkable internal diversity. There is also increasing evidence suggesting that circRNAs could be implicated in the pathogenesis of cancer and other diseases...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29218100/staphylococcus-aureus-peptidoglycan-promotes-osteoclastogenesis-via-tlr2-mediated-activation-of-the-nf-%C3%AE%C2%BAb-nfatc1-signaling-pathway
#11
Faqi Cao, Wu Zhou, Guohui Liu, Tian Xia, Mengfei Liu, Bobin Mi, Yi Liu
Staphylococcus aureus (S. aureus) peptidoglycan (PGN-sa), the major cell wall component of S. aureus, has been demonstrated to be an important virulence factor in the pathogenesis of S. aureus-induced osteomyelitis. However, the exact role of PGN-sa in osteoclastogenesis during S. aureus-induced osteomyelitis and its underlying molecular mechanisms remain unclear. In this study, we found that PGN-sa promoted receptor activator of nuclear factor-κB (NF-κB) ligand (RANKL)-induced osteoclast formation. Quantitative real-time polymerase chain reaction results showed that the mRNA expression of osteoclast-specific marker genes, including tartrate-resistant acid phosphatase, cathepsin K, matrix metalloproteinase-9, and calcitonin receptor was upregulated by PGN-sa treatment...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29218090/mir-24-regulates-hepatocyte-apoptosis-via-bim-during-acute-liver-failure
#12
Zhiwen Feng, Zhi Li, Deming Zhu, Wei Ling, Lei Zheng, Liyong Pu, Lianbao Kong
Acuteliver failure (ALF) has a high mortality rate and is characterized by massive hepatocyte destruction. Although microRNAs (miRNAs) play an important role in manyliver diseases, the role of miRNAs in ALF development is unknown. In this study, the murine ALF model was induced by intraperitoneal injection of D-galactosamine/lipopolysaccharide (D-GalN/LPS). Compared with saline-treated mice, miR-24 was distinctly down-regulated post D-GalN/LPS challenge in vivo and D-galactosamine/tumor necrosis factor (D-GalN/TNF) challenge in vitro, which was confirmed by quantitative real-time polymerase chain reaction...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29218084/regulation-of-osteogenic-differentiation-by-dna-methylation-of-the-dishevelled-gene-in-bone-marrow-mesenchymal-stem-cells
#13
Xiaofeng Han, Xinfeng Li, Guibin Zhong, Zude Liu
Bone marrow mesenchymal stem cells (BMSCs) are stem cells with multidirectional differentiation potential, which can be used as seed cells to repair and reconstruct many types of tissues and organs following injury or disease. Osteogenic differentiation involves a variety of pathway and factors, including cytokines, growth factors, and hormones. In the present study, we investigated the potential role of Dishevelled in osteogenic differentiation of BMSCs in induction medium containing the methyltransferase inhibitor 5-aza-2'-deoxycytidine...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29218063/analysis-of-the-most-common-three-mefv-mutations-in-630-patients-with-familial-mediterranean-fever-in-iranian-azeri-turkish-population
#14
Morteza Bagheri, Isa Abdi Rad
Introduction: The aim of the present study was to determine the frequency of M694V, M680I and V726A mutations of the MEFV gene in 630 Azeri Turkish patients with family Mediterranean fever. Material and Methods: The MEFV gene mutations were detected using allele-specific oligonucleotide polymerase chain reaction. Outcomes: 630 cases with a mean age ± SD of 28.54±16.54 ranging from 2.5 to 76 years old including 268 (42.54%) males and 362 (57...
September 2017: Mædica
https://www.readbyqxmd.com/read/29218062/preliminary-study-regarding-the-association-between-tumor-necrosis-factor-alpha-gene-polymorphisms-and-childhood-idiopathic-nephrotic-syndrome-in-romanian-pediatric-patients
#15
Ioana Tieranu, Monica I Dutescu, Constantin Bara, Cristian G Tieranu, Mihaela Balgradean, Olivia M Popa
Background: Childhood idiopathic nephrotic syndrome (INS) is one of the most common glomerular diseases, characterized by heavy proteinuria, hypoalbuminemia, dyslipidemia and generalized edema. Although some progresses were made regarding the pathogenesis of this disease, there are a lot of questions still left unanswered. Some of them involve the implications of several cytokines, including tumor necrosis factor alpha (TNF-alpha), in the development and clinical course of INS. Objective: Our objective was to analyze the role of two single nucleotide polymorphisms of TNF-alpha gene in the development of pediatric INS and their implication in the response to corticosteroid therapy...
September 2017: Mædica
https://www.readbyqxmd.com/read/29218012/anti-tumor-effect-of-rhaponticum-uniflorum-ethyl-acetate-extract-by-regulation-of-peroxiredoxin1-and-epithelial-to-mesenchymal-transition-in-oral-cancer
#16
Hui Chen, Chunxiao Wang, Moci Qi, Lihua Ge, Zhenchuan Tian, Jinhua Li, Min Zhang, Min Wang, Linfang Huang, Xiaofei Tang
Objective: To explore whether Rhaponticum uniflorum (R. uniflorum) had anti-tumor effects in oral cancer and investigate the molecular mechanisms involved in these anti-tumor effects. Methods: Chemical compositions of R. uniflorum ethyl acetate (RUEA) extracts were detected by ultra-performance liquid chromatography-Q/time-of-flight mass spectrometry (UPLC-Q/TOF-MS), followed by pharmacology-based network prediction analysis. The effects of RUEA extracts on proliferation, apoptosis, migration, and invasion ability of human oral squamous cell carcinoma (OSCC) cell line SCC15 were evaluated by CCK8 assay, Annexin V- fluorescein isothiocyanate/propidium iodide staining, wound healing assay, and Matrigel invasion assay, respectively...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29217749/hepatitis-delta-virus-persists-during-liver-regeneration-and-is-amplified-through-cell-division-both-in-vitro-and-in-vivo
#17
Katja Giersch, Oliver D Bhadra, Tassilo Volz, Lena Allweiss, Kristoffer Riecken, Boris Fehse, Ansgar W Lohse, Joerg Petersen, Camille Sureau, Stephan Urban, Maura Dandri, Marc Lütgehetmann
OBJECTIVE: Hepatitis delta virus (HDV) was shown to persist for weeks in the absence of HBV and for months after liver transplantation, demonstrating the ability of HDV to persevere in quiescent hepatocytes. The aim of the study was to evaluate the impact of cell proliferation on HDV persistence in vitro and in vivo. DESIGN: Genetically labelled human sodium taurocholate cotransporting polypeptide (hNTCP)-transduced human hepatoma(HepG2) cells were infected with HBV/HDV and passaged every 7 days for 100 days in the presence of the entry inhibitor Myrcludex-B...
December 7, 2017: Gut
https://www.readbyqxmd.com/read/29217418/molecular-characterization-of-virulence-and-antimicrobial-resistance-profile-of-shigella-species-isolated-from-children-with-moderate-to-severe-diarrhea-in-northeastern-brazil
#18
Pedro Henrique Quintela Soares Medeiros, Aldo Ângelo Moreira Lima, Marjorie Moreira Guedes, Alexandre Havt, Mariana Duarte Bona, Luís Carlos Rey, Alberto Melo Soares, Richard Littleton Guerrant, Bernhard H Weigl, Ila Fernanda Nunes Lima
Molecular characterization of virulence and antimicrobial resistance profiles were determined for Shigella species isolated from children with diarrhea in Fortaleza, Brazil. Fecal specimens were collected along with socioeconomic and clinical data from children with moderate to severe diarrhea requiring emergency care. Shigella spp. were isolated by standard microbiological techniques, and we developed 4 multiplex polymerase chain reaction assays to detect 16 virulence-related genes (VRGs). Antimicrobial susceptibility tests were performed using disk diffusion assays...
November 10, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29217266/auriculasin-induced-ros-causes-prostate-cancer-cell-death-via-induction-of-apoptosis
#19
Hyun-Dong Cho, Ju-Hye Lee, Kwang-Deog Moon, Ki-Hun Park, Mi-Kyung Lee, Kwon-Il Seo
Recent studies have demonstrated that natural agents targeting the accumulation of reactive oxygen species (ROS) that selectively kill, leaving normal cells undamaged, can suppress prostate cancer. Here, we show that auriculasin, derived from Flemingia philippinensis, induces significant cell death and apoptosis via ROS generation in prostate cancer cells. Auriculasin treatment resulted in selective apoptotic cell death in LNCaP prostate cancer cells, characterized by DNA fragmentation, accumulation of sub-G1 cell population, cleavage of poly (ADP-ribose) polymerase (PARP), regulation of Bax/Bcl-2 ratio, increase of cytosolic apoptosis-inducing factor (AIF) and endonuclease G (EndoG), in addition to inhibiting tumor growth in a xenograft mouse model...
December 4, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29216867/protein-kinase-c-%C3%AE-enhances-migration-of-breast-cancer-cells-through-foxc2-mediated-repression-of-p120-catenin
#20
Thao N D Pham, Bethany E Perez White, Huiping Zhao, Fariborz Mortazavi, Debra A Tonetti
BACKGROUND: Despite recent advances in the diagnosis and treatment of breast cancer, metastasis remains the main cause of death. Since migration of tumor cells is considered a prerequisite for tumor cell invasion and metastasis, a pressing goal in tumor biology has been to elucidate factors regulating their migratory activity. Protein kinase C alpha (PKCα) is a serine-threonine protein kinase implicated in cancer metastasis and associated with poor prognosis in breast cancer patients...
December 7, 2017: BMC Cancer
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