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https://www.readbyqxmd.com/read/28931241/association-of-a-novel-mutation-in-the-plasmodium-falciparum-chloroquine-resistance-transporter-with-decreased-piperaquine-sensitivity
#1
Sonia Agrawal, Kara A Moser, Lindsay Morton, Michael P Cummings, Ankita Parihar, Ankit Dwivedi, Amol C Shetty, Elliott F Drabek, Christopher G Jacob, Philipp P Henrich, Christian M Parobek, Krisada Jongsakul, Rekol Huy, Michele D Spring, Charlotte A Lanteri, Suwanna Chaorattanakawee, Chanthap Lon, Mark M Fukuda, David L Saunders, David A Fidock, Jessica T Lin, Jonathan J Juliano, Christopher V Plowe, Joana C Silva, Shannon Takala-Harrison
Background: Amplified copy number in the plasmepsin II/III genes within Plasmodium falciparum has been associated with decreased sensitivity to piperaquine. To examine this association and test whether additional loci might also contribute, we performed a genome-wide association study of ex vivo P. falciparum susceptibility to piperaquine. Methods: Plasmodium falciparum DNA from 183 samples collected primarily from Cambodia was genotyped at 33716 genome-wide single nucleotide polymorphisms (SNPs)...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28931069/methylation-associated-transcriptional-repression-of-elovl5-in-novel-colorectal-cancer-cell-lines
#2
Arnoud Boot, Jan Oosting, Jaap D H van Eendenburg, Peter J K Kuppen, Hans Morreau, Tom van Wezel
Genetic and epigenetic alterations mark colorectal cancer (CRC). Global hypomethylation is observed in nearly all CRC, but a distinct subset of CRC show the CpG Island Methylator Phenotype (CIMP). These tumors show DNA hypermethylation of a specific subset of CpG islands, resulting in transcriptional downregulation of nearby genes. Recently we reported the establishment of novel CRC cell lines derived from primary and metastatic CRC tissues. In this study we describe the DNA methylation profiling of these low passage CRC cell lines...
2017: PloS One
https://www.readbyqxmd.com/read/28931051/interleukin-17-positive-mast-cells-influence-outcomes-from-bcg-for-patients-with-cis-data-from-a-comprehensive-characterisation-of-the-immune-microenvironment-of-urothelial-bladder-cancer
#3
Alexander C Dowell, Ellen Cobby, Kaisheng Wen, Adam J Devall, Vinnie During, Jane Anderson, Nicholas D James, Kar K Cheng, Maurice P Zeegers, Richard T Bryan, Graham S Taylor
The tumour immune microenvironment is considered to influence cancer behaviour and outcome. Using a panel of markers for innate and adaptive immune cells we set out to characterise and understand the bladder tumour microenvironment of 114 patients from a prospective multicentre cohort of newly-diagnosed bladder cancer patients, followed-up for 4.33±1.71 years. We found IL-17-positive cells were significantly increased in primary and concomitant carcinoma in situ (CIS), p<0.0001, a highly malignant lesion which is the most significant single risk factor for disease progression...
2017: PloS One
https://www.readbyqxmd.com/read/28930985/visualizing-angiogenesis-by-multiphoton-microscopy-in-vivo-in-genetically-modified-3d-plga-nhap-scaffold-for-calvarial-critical-bone-defect-repair
#4
Jian Li, Holger Jahr, Wei Zheng, Pei-Gen Ren
The reconstruction of critically sized bone defects remains a serious clinical problem because of poor angiogenesis within tissue-engineered scaffolds during repair, which gives rise to a lack of sufficient blood supply and causes necrosis of the new tissues. Rapid vascularization is a vital prerequisite for new tissue survival and integration with existing host tissue. The de novo generation of vasculature in scaffolds is one of the most important steps in making bone regeneration more efficient, allowing repairing tissue to grow into a scaffold...
September 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930971/determination-of-the-optimal-chromosomal-location-s-for-a-dna-element-in-escherichia-coli-using-a-novel-transposon-mediated-approach
#5
Jakob Frimodt-Møller, Godefroid Charbon, Karen A Krogfelt, Anders Løbner-Olesen
The optimal chromosomal position(s) of a given DNA element was/were determined by transposon-mediated random insertion followed by fitness selection. In bacteria, the impact of the genetic context on the function of a genetic element can be difficult to assess. Several mechanisms, including topological effects, transcriptional interference from neighboring genes, and/or replication-associated gene dosage, may affect the function of a given genetic element. Here, we describe a method that permits the random integration of a DNA element into the chromosome of Escherichia coli and select the most favorable locations using a simple growth competition experiment...
September 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930914/the-protective-effect-of-a-short-peptide-derived-from-cold-inducible-rna-binding-protein-in-renal-ischemia-reperfusion-injury
#6
Joseph McGinn, Fangming Zhang, Monowar Aziz, Weng-Lang Yang, Jeffrey Nicastro, Gene F Coppa, Ping Wang
Extracellular cold-inducible RNA-binding protein (CIRP) functions as damage-associated molecular pattern (DAMP) and has been demonstrated to be responsible in part for the damage occurring after renal ischemia-reperfusion (I/R). A short peptide derived from CIRP, named C23, binds to myeloid differentiation factor 2 (MD2), a Toll-like receptor 4 (TLR4) co-receptor. We hypothesize that C23 reduces renal ischemia-reperfusion (RIR) injury by blocking CIRP. We observed that pre-treatment with C23 significantly decreased the levels of recombinant mouse CIRP-induced TNF-α in a dose-dependent fashion in cultured macrophages...
September 19, 2017: Shock
https://www.readbyqxmd.com/read/28930866/p2x7r-blockade-prevents-nlrp3-inflammasome-activation-and-pancreatic-fibrosis-in-a-mouse-model-of-chronic-pancreatitis
#7
Gui-Xian Zhang, Man-Xue Wang, Wei Nie, Da-Wei Liu, Yi Zhang, Hong-Bin Liu
OBJECTIVES: The aim of this study was to investigate the role of P2X7R (purinergic 2X7 receptor) and NLRP3 (NACHT, LRR, and PYD domains-containing protein 3) inflammasome activation in the process of pancreatic fibrosis in a mouse model of chronic pancreatitis (CP). METHODS: Chronic pancreatitis was induced by repeated intraperitoneal injections of 50 μg/kg cerulein for 6 weeks in mice. P2X7R antagonist oxidized ATP (OxATP) or brilliant blue G (BBG) was administered after the last cerulein injection for 2 weeks...
September 19, 2017: Pancreas
https://www.readbyqxmd.com/read/28930842/type-4b-hereditary-hemochromatosis-associated-with-a-novel-mutation-in-the-slc40a1-gene-a-case-report-and-a-review-of-the-literature
#8
Wei Zhang, Tingxia Lv, Jian Huang, Xiaojuan Ou
RATIONALE: Hereditary hemochromatosis can be divided into HFE- and non-HFE-related based on genetic mutations in different genes. HFE-related hemochromatosis is the most common inherited genetic disease in European populations but rare in Asia-pacific region. Recently, non-HFE-related hemochromatosis has been reported in patients from the Asian countries. PATIENT CONCERNS: We report the case of a 48-year-old Chinese Han woman who presented with abnormal liver function, diabetes mellitus, hyperferritinemia, and high transferrin saturation, with severe iron overload in parenchymal cells, Kupffer cells, and periportal fibrosis on liver biopsy...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28930697/overexpression-of-muc1-and-genomic-alterations-in-its-network-associate-with-prostate-cancer-progression
#9
Xiaozeng Lin, Yan Gu, Anil Kapoor, Fengxiang Wei, Tariq Aziz, Diane Ojo, Yanzhi Jiang, Michael Bonert, Bobby Shayegan, Huixiang Yang, Khalid Al-Nedawi, Pierre Major, Damu Tang
We investigate the association of MUC1 with castration-resistant prostate cancer (CRPC), bone metastasis, and PC recurrence. MUC1 expression was studied in patient-derived bone metastasis and CRPCs produced by prostate-specific PTEN(-/-) mice and LNCaP xenografts. Elevations in MUC1 expression occur in CRPC. Among nine patients with hormone-naïve bone metastasis, eight express MUC1 in 61% to 100% of PC cells. Utilizing cBioPortal PC genomic data, we organized a training (n=300), testing (n=185), and validation (n=194) cohort...
September 17, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28930610/rps6ka4-mir1237-and-aurkc-promoter-regions-are-differentially-methylated-in-wilms-tumor
#10
Hanna S Pereira, Sheila C Soares Lima, Paulo S de Faria, Leila Ca Cardoso, Hector N Seuanez
Wilms' tumor (WT) is the most frequent renal cancer in childhood, the occurrence of which is characterized by a relatively low frequency of associated mutations. While epigenetic alterations have been postulated to play a relevant role in the emergence of this tumor, the mechanisms involved in WT development remain largely unknown. In this study, the DNA methylation profile of WT was characterized with Beadchip array. Comparisons between WT with normal kidney identified 827 differentially methylated regions, most of which were attributable in hypermethylation in CpG islands...
January 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28930607/transcriptomics-in-amyotrophic-lateral-sclerosis
#11
Marios G Krokidis, Panagiotis Vlamos
Amyotrophic lateral sclerosis (ALS) is an adult-onset, incurable neurodegenerative disease characterized by the selective death of upper and lowers motor neurons in the spinal cord, brainstem and motor cortex, which ultimately leads to paralysis and death within 2-3 years of onset. ALS is poorly understood, although multiple studies have been proposed to explain the pathophysiological mechanisms of the disorder. The development of microarray technology, for simultaneous analysis of the transcriptional expression of thousands of genes, has provided new possibilities to get better insights into the pathogenesis of ALS, and most important, potential new candidate targets for novel treatments...
January 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28930599/dissection-of-prodromal-alzheimer-s-disease
#12
Can Sheng, Yue Huang, Ying Han
Pathophysiological changes of Alzheimer's Disease (AD) begin decades before clinical symptoms become apparent, providing an important window for early diagnosis and intervention. Prodromal stage of AD, a great opportunity for effective treatment and postponing the disease onset, has drawn extensive attention. The application of different biomarkers including neuroimaging, biochemical substances and genes makes AD-related pathology detectable in vivo and exploring novel biomarkers with relatively non-invasive and low cost has intrigued a wide range of interests...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28930551/uremic-toxins-are-conditional-danger-or-homeostasis-associated-molecular-patterns
#13
Yu Sun, Candice Johnson, Jun Zhou, Luqiao Wang, Ya-Feng Li, Yifan Lu, Gayani Nanayakkara, Hangfei Fu, Ying Shao, Claudette Sanchez, William Y Yang, Xin Wang, Eric T Choi, Rongshan Li, Hong Wang, Xiao-Feng Yang
We mined novel uremic toxin (UT) metabolomics/gene databases, and analyzed the expression changes of UT receptors and UT synthases in chronic kidney disease (CKD) and cardiovascular disease (CVD). We made the following observations: 1) UTs represent only 1/80(th) of human serum small-molecule metabolome; 2) Some UTs are increased in CKD and CVD; 3) UTs either induce or suppress the expression of inflammatory molecules; 4) The expression of UT genes is significantly modulated in CKD patients, and coronary artery disease (CAD) patients; 5) The expression of UT genes is upregulated by caspase-1 and TNF-alpha pathways but is inhibited in regulatory T cells...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28930546/tick-host-pathogen-systems-immunobiology-an-interactive-trio
#14
Stephen K Wikel
Significant new insights are being made into tick modulation of host immune defenses and the implications of those host defense changes on tick-borne pathogen transmission and establishment of infection. Understanding tick saliva complexity increased with construction and analyses of salivary gland cDNA libraries. High throughput next generation sequencing and advances in proteomics are revealing greater complexity of saliva, nature of gene families and differential gene expression patterns not previously attainable...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28930537/differences-in-ion-channel-phenotype-and-function-between-humans-and-animal-models
#15
Mark R Tanner, Christine Beeton
Ion channels play crucial roles in regulating a broad range of physiological processes. They form a very large family of transmembrane proteins. Their diversity results from not only a large number of different genes encoding for ion channel subunits but also the ability of subunits to assemble into homo- or heteromultimers, the existence of splice variants, and the expression of different regulatory subunits. These characteristics and the existence of very selective modulators make ion channels very attractive targets for therapy in a wide variety of pathologies...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28930535/leader-sequences-of-coronavirus-are-altered-during-infection
#16
Li Liu, Wei Chen
The life cycle of Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) involves a unique process called discontinuous transcription by which a set of 3' coterminal subgenomic mRNAs (sgmRNA) with identical 5' leader sequences can be generated. The current study demonstrates that the replication intermediates of minus strand of subgenomic RNA (sgRNA) can be readily recovered from SARS-CoV infected cells. A novel sgmRNA (M-1) was identified as a short version of membrane (M) gene. Transcriptional regulatory sequences (TRS) of SARS-CoV and Mouse Hepatitis Virus (MHV) sgmRNAs contain a species specific core element (CE)...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28930377/epigenetics-the-future-direction-in-systemic-sclerosis
#17
REVIEW
M Walczyk, A Paradowska-Gorycka, M Olesinska
Systemic sclerosis (SSc) is an immune-mediated connective tissue disease of which the aetiology is still unclear. Previous genetic studies including candidate-gene studies and genomewide association studies have identified a number of genetic variations that confer risk to SSc. However, these variants, such as single nucleotide polymorphisms, cannot completely explain the SSc susceptibility and the diversity in the clinical symptoms of SSc patients. The contribution of epigenetic mechanisms as a link between genetics and environmental triggers represents promising field in understanding the pathogenesis of SSc...
August 21, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28930171/comprehensive-evaluation-of-tff3-promoter-hypomethylation-and-molecular-biomarker-potential-for-prostate-cancer-diagnosis-and-prognosis
#18
Maibritt Nørgaard, Christa Haldrup, Tine Maj Storebjerg, Else Marie Vestergaard, Peter J Wild, Søren Høyer, Michael Borre, Torben Falck Ørntoft, Karina Dalsgaard Sørensen
Overdiagnosis and overtreatment of clinically insignificant tumors remains a major problem in prostate cancer (PC) due to suboptimal diagnostic and prognostic tools. Thus, novel biomarkers are urgently needed. In this study, we investigated the biomarker potential of Trefoil factor 3 (TFF3) promoter methylation and RNA expression levels for PC. Initially, by quantitative methylation specific PCR (qMSP) analysis of a large radical prostatectomy (RP) cohort (n = 292), we found that the TFF3 promoter was significantly hypomethylated in PC compared to non-malignant (NM) prostate tissue samples (p < 0...
September 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28930140/identification-of-phlogacantholide-c-as-a-novel-adam10-enhancer-from-traditional-chinese-medicinal-plants
#19
Myriam Meineck, Florian Schuck, Sara Abdelfatah, Thomas Efferth, Kristina Endres
Background: Alzheimer's disease is one of the most prevalent dementias in the elderly population with increasing numbers of patients. One pivotal hallmark of this disorder is the deposition of protein aggregates stemming from neurotoxic amyloid-beta peptides. Synthesis of those peptides has been efficiently prevented in AD model mice by activation of an enzyme called alpha-secretase. Therefore, drugs with the capability to increase the expression of this enzyme, named ADAM10, have been suggested as a valuable therapeutic medication...
December 5, 2016: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28929968/c-state-an-interactive-web-app-for-simultaneous-multi-gene-visualization-and-comparative-epigenetic-pattern-search
#20
Divya Tej Sowpati, Surabhi Srivastava, Jyotsna Dhawan, Rakesh K Mishra
BACKGROUND: Comparative epigenomic analysis across multiple genes presents a bottleneck for bench biologists working with NGS data. Despite the development of standardized peak analysis algorithms, the identification of novel epigenetic patterns and their visualization across gene subsets remains a challenge. RESULTS: We developed a fast and interactive web app, C-State (Chromatin-State), to query and plot chromatin landscapes across multiple loci and cell types...
September 13, 2017: BMC Bioinformatics
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