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https://www.readbyqxmd.com/read/28934847/participation-of-ccl1-in-snail-positive-fibroblasts-in-colorectal-cancer-contribute-to-5-fluorouracil-paclitaxel-chemoresistance
#1
Ziqian Li, Kaying Chan, Yifei Qi, Linlin Lu, Fen Ning, Mengling Wu, Yuan Wang, Shaohui Cai, Jun Du
Purpose: Cancer-associated fibroblasts (CAFs) activated by cancer cells has a central role in development and malignant biological behavior in colorectal cancer (CRC). Adult fibroblasts do not express Snail, but Snail-positive fibroblasts are discovered in the stroma of malignant CRC and reported to be the key role to chemoresistance. However, the reciprocal effect of CAFs expressed Snail to chemoresistance on CRC cells and the underlying molecular mechanisms are not fully characterized...
September 18, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28931690/conformational-changes-in-the-5-end-of-the-hiv-1-genome-dependent-on-the-debranching-enzyme-dbr1-during-early-stages-of-infection
#2
Alvaro E Galvis, Hugh E Fisher, Hung Fan, David Camerini
Previous studies in our laboratory showed that the RNA debranching enzyme (DBR1) is not required for early steps in HIV cDNA formation, but is necessary for synthesis of intermediate and late cDNA products. To further characterize this effect, we evaluated the topology of the 5' end of the HIV-1 RNA genome during early infection with and without inhibition of DBR1 synthesis. Cells were transfected with DBR1 shRNA followed 48 hours later by infection with an HIV-1 derived vector containing an RNase H deficient reverse transcriptase...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28931682/susceptibility-of-human-endogenous-retrovirus-type-k-to-reverse-transcriptase-inhibitors
#3
Rafael A Contreras-Galindo, Derek Dube, Koh Fujinaga, Mark H Kaplan, David M Markovitz
Human Endogenous Retroviruses make up 8% of the human genome. The HERV-K HML-2 (HK2) family contains proviruses that are the most recent entrants into the human germline and are transcriptionally active. In HIV-1 infection and cancer, HK2 genes produce retroviral particles that appear to be infectious, yet the replication capacity of these viruses and potential pathogenicity has been difficult to ascertain. In this report, we screened the efficacy of commercially available reverse transcriptase inhibitors (RTIs) at inhibiting the enzymatic activity of the HK2 RT and HK2 genomic replication...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28930865/presence-of-human-herpesvirus-6b-in-the-pancreas-of-subjects-with-and-without-type-1-diabetes
#4
Maja Ericsson, Oskar Skog
OBJECTIVES: The aims of this study were to investigate the presence of human herpesvirus 6 (HHV6) A and B in human pancreata and to search for signs of active infection in this organ of subjects with and without type 1 diabetes (T1D). METHODS: Pancreata from brain-dead organ donors with and without T1D were examined for the presence of HHV6 genomic sequences by polymerase chain reaction (PCR), transcripts by reverse transcriptase-PCR, and protein by immunohistochemistry...
September 19, 2017: Pancreas
https://www.readbyqxmd.com/read/28930600/line-1-as-a-therapeutic-target-for-castration-resistant-prostate-cancer
#5
Nadine Houede, Pier Vincenzo Piazza, Philippe Pourquier
Prostate cancer is the third leading cause of death by cancer in men. Surgery or hormone deprivation usually contains the progression of the local forms of the disease. In metastatic situations, chemotherapy or second generation hormone therapies are used with an overall survival that never exceeds 36 months when tumors become resistant to castration. In the search for new alternatives, clinical trials with various classes of anticancer drugs have been performed, including chemotherapies, targeted therapies with kinase inhibitors, radium-223, or immunotherapies with somehow limited efficacy...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28929861/ulipristal-acetate-and-extracellular-matrix-production-in-human-leiomyomas-in-vivo-a-laboratory-analysis-of-a-randomized-placebo-controlled-trial
#6
Jeris Cox, Minnie Malik, Joy Britten, Terrence Lewis, William H Catherino
In a prior randomized controlled study, patients treated with ulipristal acetate (UPA) or placebo for 3 months had a decrease in leiomyoma size. A total of 10 patients' tissue samples (5 placebo and 5 treated with 10 mg/d UPA) that underwent hysterectomy and tissue preservation were identified from this study. Quantitative real-time reverse transcriptase polymerase chain reaction and Western blotting were used to assess fold gene and protein expression of extracellular membrane (ECM) proteins: collagen 1A (COL1A), fibronectin (FN1), and versican (VCAN) of the samples...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28928403/dimerization-regulates-both-deaminase-dependent-and-deaminase-independent-hiv-1-restriction-by-apobec3g
#7
Michael Morse, Ran Huo, Yuqing Feng, Ioulia Rouzina, Linda Chelico, Mark C Williams
APOBEC3G (A3G) is a human enzyme that inhibits human immunodeficiency virus type 1 (HIV-1) infectivity, in the absence of the viral infectivity factor Vif, through deoxycytidine deamination and a deamination-independent mechanism. A3G converts from a fast to a slow binding state through oligomerization, which suggests that large A3G oligomers could block HIV-1 reverse transcriptase-mediated DNA synthesis, thereby inhibiting HIV-1 replication. However, it is unclear how the small number of A3G molecules found in the virus could form large oligomers...
September 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28926895/-clinical-utility-study-of-21-gene-assay-in-927-chinese-patients-with-early-breast-cancer
#8
J Y Wu, Y Fang, L Lin, Y Zong, X S Chen, O Huang, J R He, L Zhu, W G Chen, Y F Li, K W Shen
Objective: To investigate the distribution patterns of 21-gene assay and its influencing factors in Chinese patients with early breast cancer. Methods: Nine hundred and twenty-seven early breast cancer patients were retrospectively recruited from January 2009 to December 2015 at Ruijin Hospital, Shanghai Jiaotong University School of Medicine. The 21-gene reverse transcriptase-polymerase chain reaction(RT-PCR) assay were conducted in paraffin-embedded tumor tissues to calculate the Recurrence Score(RS). Immunohistochemistry(IHC) assay was used to measure the expression levels of estrogen receptor(ER), progesterone receptor(PR) and Ki-67...
September 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28926712/pyrophosphate-release-in-the-protein-hiv-reverse-transcriptase
#9
Murat Atiş, Kenneth A Johnson, Ron Elber
Enzymatic reactions usually occur in several steps: A step of substrate binding to the surface of the protein, a step of protein re-organization around the substrate and conduction of a chemical reaction, and a step of product release. The release of inorganic phosphate - PPi - from the matrix of the protein HIV reverse transcriptase is investigated computationally. Atomically detailed simulations with explicit solvent are analyzed to obtain the free energy profile, mean first passage time, and detailed molecular mechanisms of PPi escape...
September 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28926404/metabolic-health-across-the-body-mass-index-spectrum-in-hiv-infected-and-hiv-uninfected-men
#10
Jordan E Lake, Xiuhong Li, Frank J Palella, Kristine M Erlandson, Dorothy Wiley, Lawrence Kingsley, Lisa P Jacobson, Todd T Brown
OBJECTIVES: In the general population, metabolic health (MH) often declines as body mass index (BMI) increases. However, some obese individuals maintain MH. HIV and antiretroviral therapy (ART) have been associated with metabolic disturbances. We hypothesized that HIV-infected (HIV+) men on suppressive ART experience less MH than HIV-uninfected (HIV-) men across all BMI categories. DESIGN/METHODS: In a cross-sectional analysis of 1018 HIV+ and 1092 HIV- men enrolled in the Multicenter AIDS Cohort Study, Poisson regression with robust variance determined associations between HIV serostatus and MH prevalence (defined as meeting 2 of 5 NCEP/ATP III metabolic syndrome criteria), adjusting for age, race, BMI category, smoking and hepatitis C virus infection status...
September 18, 2017: AIDS
https://www.readbyqxmd.com/read/28926397/time-to-first-positive-hiv-1-dna-pcr-may-differ-with-antiretroviral-regimen-in-infants-infected-with-non-b-subtype-hiv-1
#11
Raji Balasubramanian, Mary Glenn Fowler, Kenneth Dominguez, Shahin Lockman, Pat A Tookey, Nicole Ngo Giang Huong, Steven Nesheim, Michael D Hughes, Marc Lallemant, Jennifer Tosswill, Nathan Shaffer, Gayle Sherman, Paul Palumbo, David E Shapiro
OBJECTIVE: To evaluate the association of type and timing of prophylactic maternal and infant antiretroviral regimen with time to first positive HIV-1 DNA polymerase chain reaction (PCR) test, in non-breastfed HIV-infected infants from populations infected predominantly with HIV-1 non-B subtype virus. DESIGN: Analysis of combined data on non-breastfed HIV-infected infants from prospective cohorts in Botswana, Thailand and the United Kingdom (n = 405). METHODS: Parametric models appropriate for interval-censored outcomes estimated the time to first positive PCR according to maternal or infant antiretroviral regimen category and timing of maternal antiretroviral initiation, with adjustment for covariates...
September 18, 2017: AIDS
https://www.readbyqxmd.com/read/28924845/inspection-of-perirectal-lymph-nodes-by-one-step-nucleic-acid-amplification-predicts-lateral-lymph-node-metastasis-in-advanced-rectal-cancer
#12
Yuichiro Miyake, Tsunekazu Mizushima, Taishi Hata, Hidekazu Takahashi, Hiroyuki Hanada, Hiroki Shoji, Masatoshi Nomura, Naotsugu Haraguchi, Junichi Nishimura, Chu Matsuda, Ichiro Takemasa, Yuichiro Doki, Ikuhiro Maeda, Masaki Mori, Hirofumi Yamamoto
BACKGROUND: Lateral lymph node dissection (LLND) is performed for advanced rectal cancers in Japan; however, it can cause sexual and urinary dysfunction. The incidence of lateral LN metastasis is estimated at 7-13.9%; therefore, excessive rectal surgery with LLND should be avoided, especially for prophylactic purposes. To identify the patients who require LLND, we examined metastases in perirectal LNs by using a one-step nucleic acid amplification (OSNA) assay to predict lateral LN metastases...
September 18, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28923603/unraveling-the-expression-of-genes-involved-in-the-biosynthesis-pathway-of-cardiolipin-and-phosphatidylethalonamine-in-salmonella-hadar-grown-under-static-magnetic-field-200%C3%A2-mt
#13
Ramla Ben Mouhoub, Ahlem Mansouri, Khadidja Aliliche, Hamida Beghalem, Ahmed Landoulsi, Alya El May
We aim in this work to evaluate the effect of static magnetic field 200 mT (SMF) on the expression of genes involved in the biosynthetic pathway of cardiolipin: g3pd, plsB, cdsA, pgsA, pgpA, cls and phosphatidylethanolamine: pssA and psd in Salmonella enterica subsp Enterica serovar Hadar. Bacteria were exposed to a SMF during 3, 6 and 9 h. RNA extraction was followed by Reverse Transcriptase Polymerase Chain Reaction RT-PCR. The relative quantification of mRNA expression levels using 16S rRNA doesn't change during the time exposure...
September 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28923179/drugs-and-hyperglycemia-a-practical-guide
#14
REVIEW
Vandana Jain, Ronak Kumar Patel, Zaureen Kapadia, Sneha Galiveeti, Maryann Banerji, Lisel Hope
Drug-induced diabetes is one of the factors contributing to the increasing incidence of diabetes worldwide. This review considers the frequency, pathogenesis and treatment of drug-induced diabetes. Drugs that induce diabetes include hormonal therapy, especially glucocorticoids and androgen blockers, cardiovascular drugs, especially statins, beta-blockers and diuretics, antipsychotics, especially clozapine, olanzapine and quetiapine, antiretrovirals (protease inhibitors and non-reverse transcriptase inhibitors - NRTIs) and other drugs (mechanistic target of rapamycin inhibitors -mTORs, post organ transplantation drugs, tyrosine kinase inhibitors and interferon-alpha)...
October 2017: Maturitas
https://www.readbyqxmd.com/read/28922619/identification-of-angiogenesis-inhibitors-using-a-co-culture-cell-model-in-a-high-content-and-high-throughput-screening-platform
#15
Shuaizhang Li, Chia-Wen Hsu, Srilatha Sakamuru, Chaozhong Zou, Ruili Huang, Menghang Xia
Angiogenesis is an important hallmark of cancer, contributing to tumor formation and metastasis. In vitro angiogenesis models for analyzing tube formation serve as useful tools to study these processes. However, current in vitro co-culture models using primary cells have limitations in usefulness and consistency. Therefore, in the present study, an in vitro co-culture assay system was optimized in a 1536-well format for high-throughput screening using human telomerase reverse transcriptase (hTERT)-immortalized mesenchymal stem cells and aortic endothelial cells...
September 1, 2017: SLAS Technology
https://www.readbyqxmd.com/read/28922614/mexxy-efflux-pump-overexpression-and-aminoglycoside-resistance-in-cystic-fibrosis-isolates-of-i-pseudomonas-aeruginosa-i-from-chronic-infections
#16
Manu Singh, Yvonne Yau, Shirley Wang, Valerie Waters, Ayush Kumar
In this study, we analyzed 15 multidrug resistant cystic fibrosis isolates of Pseudomonas aeruginosa from chronic lung infections for expression of four different multidrug efflux systems, MexAB-OprM, MexCD-OprJ, MexEF-OprN and MexXY, using quantitative reverse transcriptase-PCR. Overexpression of MexXY pump was observed in all of the isolates tested. Analysis of regulatory genes that control the expression of these four efflux pumps revealed a number of previously uncharacterized mutations. Our work shows that MexXY pump overexpression is common in cystic fibrosis isolates and could be contributing to their reduced aminoglycoside susceptibility...
September 18, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28919801/transforming-growth-factor-%C3%AE-1-smad3-independent-epithelial-mesenchymal-transition-in-type-i-collagen-glomerulopathy
#17
Amanda C Brodeur, Anna M Roberts-Pilgrim, Kimberlee L Thompson, Craig L Franklin, Charlotte L Phillips
The glomerulofibrotic Col1a2-deficient mouse model demonstrates glomerular homotrimeric type I collagen deposition in mesangial and subendothelial spaces. In this report, we investigate the role of transforming growth factor β1 (TGF-β1) in myofibroblast activation and epithelial-mesenchymal transition (EMT) in this glomerulopathy. Immunohistochemical analyses of glomerular α-sma, desmin, vimentin, and proliferating cell nuclear antigen demonstrated parietal epithelial cell proliferation and EMT in late stages of the glomerulopathy in the Col1a2-deficient mice...
2017: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/28919726/gene-expression-levels-of-the-insulin-like-growth-factor-family-in-patients-with-amd-before-and-after-ranibizumab-intravitreal-injections
#18
Barbara Strzalka-Mrozik, Malgorzata Kimsa-Furdzik, Adam Kabiesz, Katarzyna Michalska-Malecka, Malgorzata Nita, Urszula Mazurek
PURPOSE: The present study focused on the assessment of the mRNA levels of the insulin-like growth factor (IGF) family in patients with the exudative form of age-related macular degeneration (AMD) before and after ranibizumab intravitreal injections. PATIENTS AND METHODS: An analysis of the expression profile of the IGF family of genes in patients with AMD was carried out using the oligonucleotide microarray and quantitative reverse transcriptase polymerase chain reaction (RT-qPCR) methods...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28918772/incidence-and-risk-factors-for-dengue-virus-denv-infection-in-the-first-2-years-of-life-in-a-brazilian-prospective-birth-cohort
#19
P M S Castanha, U R Montarroyos, S M M Silveira, G D M Albuquerque, M J G Mello, K G S Lopes, M T Cordeiro, E T A Marques, C M T Martelli, C Braga
This study assessed the incidence and risk factors for dengue virus (DENV) infection among children in a prospective birth cohort conducted in the city of Recife, a hyperendemic dengue area in Northeast Brazil. Healthy pregnant women (n = 415) residing in Recife who agreed to have their children followed were enrolled. Children were followed during their first 24 months of age (May/2011-June/2014), before the 2015 Zika virus outbreak. DENV infection was detected by reverse-transcriptase polymerase chain reaction and/or serology (anti-DENV IgM/IgG)...
September 18, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28918075/direct-detection-of-trichomonas-vaginalis-virus-in-trichomonas-vaginalis-positive-clinical-samples-from-the-netherlands
#20
Ivo Jehee, Charlotte van der Veer, Michelle Himschoot, Mirjam Hermans, Sylvia Bruisten
Trichomonas vaginalis is the most common sexually transmitted parasitical infection worldwide. T. vaginalis can carry a virus: Trichomonas vaginalis virus (TVV). To date, four TVV species have been described. Few studies have investigated TVV prevalence and its clinical importance. We have developed a nested reverse-transcriptase PCR, with novel, type specific primers to directly detect TVV RNA in T. vaginalis positive clinical samples. A total of 119T. vaginalis positive clinical samples were collected in Amsterdam and "s-Hertogenbosch, the Netherlands, from 2012 to 2016...
September 13, 2017: Journal of Virological Methods
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