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https://www.readbyqxmd.com/read/28335547/genomic-loads-and-genotypes-of-respiratory-syncytial-virus-viral-factors-during-lower-respiratory-tract-infection-in-chilean-hospitalized-infants
#1
Yazmín Espinosa, Camila San Martín, Alejandro A Torres, Mauricio J Farfán, Juan P Torres, Vasanthi Avadhanula, Pedro A Piedra, Lorena I Tapia
The clinical impact of viral factors (types and viral loads) during respiratory syncytial virus (RSV) infection is still controversial, especially regarding newly described genotypes. In this study, infants with RSV bronchiolitis were recruited to describe the association of these viral factors with severity of infection. RSV antigenic types, genotypes, and viral loads were determined from hospitalized patients at Hospital Roberto del Río, Santiago, Chile. Cases were characterized by demographic and clinical information, including days of lower respiratory symptoms and severity...
March 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335522/extracellular-vesicles-deliver-host-and-virus-rna-and-regulate-innate-immune-response
#2
REVIEW
Takahisa Kouwaki, Masaaki Okamoto, Hirotake Tsukamoto, Yoshimi Fukushima, Hiroyuki Oshiumi
The innate immune system plays a crucial role in controlling viral infection. Pattern recognition receptors (PRRs), such as Toll-like receptors and RIG-I-like receptors, sense viral components called pathogen-associated molecular patterns (PAMPs) and trigger signals to induce innate immune responses. Extracellular vesicles (EVs), including exosomes and microvesicles, deliver functional RNA and mediate intercellular communications. Recent studies have revealed that EVs released from virus-infected cells deliver viral RNA to dendritic cells and macrophages, thereby activating PRRs in recipient cells, which results in the expression of type I interferon and pro-inflammatory cytokines...
March 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335455/viral-protein-kinetics-of-piscine-orthoreovirus-infection-in-atlantic-salmon-blood-cells
#3
Hanne Merethe Haatveit, Øystein Wessel, Turhan Markussen, Morten Lund, Bernd Thiede, Ingvild Berg Nyman, Stine Braaen, Maria Krudtaa Dahle, Espen Rimstad
Piscine orthoreovirus (PRV) is ubiquitous in farmed Atlantic salmon (Salmo salar) and the cause of heart and skeletal muscle inflammation. Erythrocytes are important target cells for PRV. We have investigated the kinetics of PRV infection in salmon blood cells. The findings indicate that PRV causes an acute infection of blood cells lasting 1-2 weeks, before it subsides into persistence. A high production of viral proteins occurred initially in the acute phase which significantly correlated with antiviral gene transcription...
March 18, 2017: Viruses
https://www.readbyqxmd.com/read/28335101/prevalence-and-incidence-of-depression-during-interferon-based-antiviral-therapy-in-chronic-hepatitis-c-patients-in-the-republic-of-korea
#4
Joo Yeong Baeg, In Hee Kim, Seung Young Seo, Young Seok Kim, Eun Uk Jung, Junhyeon Cho, Jung Wha Chung, Eun Sun Jang, Jin Wook Kim, Sook-Hyang Jeong
Background/Aims: The association between depression and chronic hepatitis C virus (HCV) infection or pegylated interferon α and ribavirin therapy (PR therapy) has not been extensively studied in Korea. We aimed to clarify the prevalence of depression and its incidence during PR therapy in chronic hepatitis C (CHC) patients. Methods: In this prospective, multicenter study, 114 CHC patients were screened for depression using two self-reported scales, the Beck Depression Inventory-I (BDI-I) and the Hospital Anxiety and Depression scale (HADS)...
March 24, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28334941/rna-protein-interactions-govern-antiviral-specificity-and-encapsidation-of-broad-spectrum-anti-hiv-reverse-transcriptase-aptamers
#5
Margaret J Lange, Phuong D M Nguyen, Mackenzie K Callaway, Marc C Johnson, Donald H Burke
RNA aptamers that bind HIV-1 reverse transcriptase (RT) inhibit HIV-1 replication, but little is known about potential aptamer-specific viral resistance. During replication, RT interacts with diverse nucleic acids. Thus, the genetic threshold for eliciting resistance may be high for aptamers that make numerous contacts with RT. To evaluate the impact of RT-aptamer binding specificity on replication, we engineered proviral plasmids encoding diverse RTs within the backbone of HIV-1 strain NL4-3. Viruses inhibited by pseudoknot aptamers were rendered insensitive by a naturally occurring R277K variant, providing the first demonstration of aptamer-specific resistance in cell culture...
March 6, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28333950/drug-resistant-hiv-behaviors-and-characteristics-among-los-angeles-men-who-have-sex-with-men-with-new-hiv-diagnosis
#6
Pamina M Gorbach, Marjan Javanbakht, Lorelei Bornfleth, Robert K Bolan, Martha Lewis Blum
Epidemiology of drug resistant HIV has focused on trends and less attention has been given to identification of factors, especially behaviors including substance use, in acquisition of drug-resistant HIV. From 2009 to 2012 The Metromates Study enrolled and followed for one year men who have sex with men (MSM) seeking testing for HIV in a community clinic in Los Angeles assessing those testing positive for acute and recent HIV infection. Behavioral data were collected via Computer-Assisted Self-Interview from 125 classified as newly HIV infected and 91 as chronically infected (newly HIV-diagnosed); specimens were available and viable for resistance testing for 154 of the 216 HIV positives with new diagnoses...
2017: PloS One
https://www.readbyqxmd.com/read/28332900/fc-or-not-fc-that-is-the-question-antibody-fc-receptor-interactions-are-key-to-universal-influenza-vaccine-design
#7
Sinthujan Jegaskanda, Hillary A Vanderven, Adam K Wheatley, Stephen J Kent
A universal vaccine that provides long-lasting protection from both epidemic and pandemic influenza viruses remains the "holy grail" of influenza vaccine research. Though virus neutralization assays are the current benchmark of measuring vaccine effectiveness, it is clear that Fc-receptor functions can drastically improve the effectiveness of antibodies and vaccines in vivo. Antibodies that kill virus-infected cells and/or elicit an antiviral environment, termed antibody-dependent cellular cytotoxicity (ADCC)-mediating antibodies, provide a link between the innate and adaptive immune response...
March 23, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28332752/bovine-trophectoderm-cells-induced-from-bovine-fibroblasts-with-induced-pluripotent-stem-cell-reprogramming-factors
#8
Neil C Talbot, Wendy O Sparks, Caitlin Phillips, Alan D Ealy, Anne M Powell, Thomas J Caperna, Wesley M Garrett, David M Donovan, Le Ann Blomberg
Thirteen independent induced bovine trophectroderm (iBT) cell lines were established by reprogramming bovine fetal liver-derived fibroblasts after viral-vector transduction with either 6 or 8 factors, including POU5F1 (OCT4), KLF4, SOX2, MYC, NANOG, LIN28, SV40 large T antigen, and hTERT.. Light- and electron-microscopy analysis showed that the iBT cells had epithelial cell morphology typical of bovine trophectoderm cells. Reverse-transcription-PCR assays indicated that all of the cell lines expressed interferon-tau (IFNT) at passages 1 or 2...
March 23, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28332729/transplantation-of-kidneys-from-hepatitis-c-positive-donors-into-hepatitis-c-virus-infected-recipients-followed-by-early-initiation-of-direct-acting-antiviral-therapy-a-single-center-retrospective-study
#9
Kalyan Ram Bhamidimarri, Marco Ladino, Fernando Pedraza, Giselle Guerra, Adela Mattiazzi, Linda Chen, Gaetano Ciancio, Warren Kupin, Paul Martin, George Burke, David Roth
The availability of direct acting antiviral agents (DAA) has transformed the treatment of hepatitis C virus (HCV) infection. The current study is a case series that reports the outcomes from a cohort of twenty-five HCV-infected ESRD patients who received a kidney from an anti-HCV-positive deceased organ donor followed by treatment with DAAs in the early post-transplant period. Time to transplantation and the efficacy of DAA therapy as measured by sustained viral response at 12 weeks were assessed. The median waiting time from original date of activation on the UNOS waiting list until transplantation was 427 days, however, the median time from entering the patient into UNet(sm) for a HCV positive offer until transplantation was only 58 days...
March 23, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28332476/new-onset-hepatitis-c-virus-associated-glomerulonephritis-following-sustained-virologic-response-with-direct-acting-antiviral-therapy%C3%A2
#10
Muriel Ghosn, Matthew B Palmer, Catherine E Najem, Danny Haddad, Peter A Merkel, Jonathan J Hogan
Glomerulonephritis (GN) is an important extra-hepatic manifestation of infection with hepatitis C virus (HCV). HCV-associated GN occurs due to HCV-induced lymphoproliferation, leading to the generation of pathogenic immune complexes, including complexes containing cryoglobulins. The management of HCV-associated extra-hepatic disease is focused on viral eradication, with direct-acting antiviral agents leading to high rates of sustained virologic remission. There have been a few reports of relapsing cryoglobulinemic vasculitis after sustained virologic remission was achieved with interferon-based therapies...
March 23, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28332360/entecavir-to-telbivudine-switch-therapy-in-entecavir-treated-patients-with-undetectable-hepatitis-b-viral-dna
#11
Dong Hyun Kim, Jong Won Choi, Jeong Hun Seo, Yong Suk Cho, Sun Young Won, Byung Kyu Park, Han Ho Jeon, Sang Yun Shin, Chun Kyon Lee
PURPOSE: This study examined 2-year outcome of consecutive therapy using entecavir (ETV) followed by telbivudine (LdT) in subjects with undetectable hepatitis B virus (HBV) DNA level and normal alanine aminotransferase level after the initial 6 months of ETV treatment. MATERIALS AND METHODS: Sixty subjects were randomized to continue with ETV or switch to LdT. Significant difference in baseline characteristics was not found between the two groups. Persistent HBV DNA level of 20-60 IU/mL in three consecutive samples collected three months apart or singly measured HBV DNA level of >60 IU/mL was defined as virological rebound...
May 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28331841/resistance-testing-for-the-treatment-of-chronic-hepatitis-c-with-direct-acting-antivirals-when-and-for-how-long
#12
Ana Belén Pérez, Natalia Chueca, Federico García
The need to test for resistance associated substitutions (RAS) has been intensively debated in the past two years. In the absence of pangenotypic combinations, it seems reasonable that, if available, RAS testing in the NS5A gene at baseline for genotypes 1a and 3 may help to avoid overtreatment in terms of ribavirin usage and/or prolonged treatment duration. When patients fail treatment, RAS testing may also be useful to guide the selection of the new regimen, especially for those that need urgent retreatment and that have failed a combination including an NS5A inhibitor...
March 2017: Germs
https://www.readbyqxmd.com/read/28331840/consensus-statement-on-the-management-of-patients-with-hcv-infection-in-romania
#13
REVIEW
(no author information available yet)
BACKGROUND: HCV direct-acting antivirals (DAAs) have made treatment easier for both patients and healthcare practitioners, but have also brought new challenges in terms of patient management and monitoring prior to, during, and after treatment. METHODS: To sum up and unify the clinical experience of Romanian DAA prescribing physicians, we have organized a Consensus Meeting in November 2016 in Bucharest, Romania. CONSENSUS STATEMENT: The Consensus Meeting has provided expert answers to ten significant questions regarding HCV infection, namely: How do we diagnose patients with HCV infection? How do we stage liver disease in patients with HCV infection? How do we monitor patients with HCV infection prior to treatment? Which patients with HCV infection do we treat? When do we start treatment for HCV infection? What regimens do we use for treating HCV infection? How do we monitor patients with HCV infection during treatment? What adverse events should we expect during treatment of HCV infection and how do we prevent/manage them? How do we monitor patients with HCV infection after treatment? How do we expect the landscape of HCV to change in the following years? ...
March 2017: Germs
https://www.readbyqxmd.com/read/28331366/the-effects-of-turmeric-curcumin-on-tumor-suppressor-protein-p53-and-estrogen-receptor-er%C3%AE-in-breast-cancer-cells
#14
Kelly Hallman, Katie Aleck, Brigitte Dwyer, Victoria Lloyd, Meghan Quigley, Nada Sitto, Amy E Siebert, Sumi Dinda
Curcumin (CUR) is a compound that has antibacterial, antiviral, anti-inflammatory, and anticancer properties. In this study, we have analyzed the effects of CUR on the expression of ERα and p53 in the presence of hormones and anti-hormones in breast cancer cells. Cells were cultured in a medium containing charcoal-stripped fetal bovine serum to deplete any endogenous steroids and treated with CUR at varying concentrations or in combination with hormones and anti-hormones. Protein analysis revealed a relative decrease in the levels of p53 and ERα upon treatment with 5-60 µM CUR...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/28331343/silencing-trim59-inhibits-invasion-migration-and-epithelial-to-mesenchymal-transition-via-tgf-%C3%AE-smad2-3-signaling-pathway-in-bladder-cancer-cells
#15
Wei Chen, Kai Zhao, Chenkui Miao, Aiming Xu, Jianzhong Zhang, Jundong Zhu, Shifeng Su, Zengjun Wang
The evolutionarily conserved genes that encode the tripartite motif (TRIM) protein family are involved in various biological processes, including cellular immunity, inflammatory reaction, antiviral activity, and tumor progression. One member of this protein family, Trim59, has been reported as a novel biomarker for the occurrence and progression of multiple human carcinomas, such as lung cancer, gastric cancer, cervical cancer, and osteosarcoma. However, little is known about the relationship between Trim59 and bladder carcinogenesis...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28331190/natural-killer-cell-activation-contributes-to-hepatitis-b-viral-control-in-a-mouse-model
#16
Shiwen Tong, Guangze Liu, Minghong Li, Xiumei Li, Qian Liu, Hong Peng, Shiying Li, Hong Ren, Wenwei Yin
The roles of CD4 + T cells and CD8 + T cells in hepatitis B virus (HBV) infection have been well documented. However, the role of innate immunity in HBV infection remains obscure. Here we examined the effect of activation of innate immunity by polyinosinic: polycytidylic acid (PolyI:C) on HBV infection. A chronic HBV replication mouse model was established by hydrodynamical injection of pAAV/HBV1.2 plasmid into C57BL/6 mice. We found that HBV did not seem to induce an active NK-cell response in the mouse model...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28331165/tim-3-and-pd-1-regulate-cd8-t-cell-function-to-maintain-early-pregnancy-in-mice
#17
Yuan-Yuan Xu, Song-Cun Wang, Yi-Kong Lin, Da-Jin Li, Mei-Rong DU
During pregnancy, CD8(+) T cells are important regulators in the balance of fetal tolerance and antiviral immunity. T-cell immunoglobulin mucin-3 (Tim-3) and programmed cell death-1 (PD-1) are well-recognized negative co-stimulatory molecules involved in viral persistence and tumor metastasis. Here, we demonstrate that CD8(+) T cells co-expressing Tim-3 and PD-1 were down-regulated in the deciduae of female mice in abortion-prone matings compared with normal pregnant mice. In addition to their reduced numbers, the Tim-3(+)PD-1(+)CD8(+) T cells produced lower levels of the anti-inflammatory cytokines interleukin (IL)-4 and IL-10, as well as a higher level of the pro-inflammatory cytokine interferon (IFN)-γ, relative to those from normal pregnancy...
March 23, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28331099/interferon-inducible-oligoadenylate-synthetase-like-protein-acts-as-an-antiviral-effector-against-classical-swine-fever-virus-via-the-mda5-mediated-type-i-interferon-signaling-pathway
#18
Lian-Feng Li, Jiahui Yu, Yuexiu Zhang, Qian Yang, Yongfeng Li, Lingkai Zhang, Jinghan Wang, Su Li, Yuzi Luo, Yuan Sun, Hua-Ji Qiu
Classical swine fever virus (CSFV) is the causative agent of classical swine fever (CSF), which poses a serious threat to the global pig industry. Interferons (IFNs) and IFN-stimulated genes (ISGs) play a key role in host antiviral defense. We have previously screened the porcine 2' -5' -oligoadenylate synthase-like protein (pOASL) as a potential anti-CSFV ISG using a reporter CSFV. This study aimed to clarify the underlying antiviral mechanism of pOASL against CSFV. We confirmed that CSFV replication was significantly suppressed in lentivirus-delivered, pOASL-overexpressing PK-15 cells, whereas silencing the expression of endogenous pOASL by small interfering RNAs markedly enhanced CSFV growth...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28331092/monkeypox-virus-host-factor-screen-in-haploid-cells-identifies-essential-role-of-garp-complex-in-extracellular-virus-formation
#19
Susan Realegeno, Andreas S Puschnik, Amrita Kumar, Cynthia Goldsmith, Jillybeth Burgado, Suryaprakash Sambhara, Victoria A Olson, Darin Carroll, Inger Damon, Tetsuya Hirata, Taroh Kinoshita, Jan E Carette, Panayampalli Subbian Satheshkumar
Monkeypox virus (MPXV) is a human pathogen that is a member of the Orthopoxvirus genus, which includes Vaccinia virus and Variola virus (the causative agent of smallpox). Human monkeypox is considered an emerging zoonotic infectious disease. To identify host factors required for MPXV infection, we performed a genome-wide insertional mutagenesis screen in human haploid cells. The screen revealed several candidate genes, including those involved in Golgi trafficking, glycosaminoglycan biosynthesis and glycosylphosphatidylinositol (GPI) - anchor biosynthesis...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28329944/-evolutionary-characteristics-and-positive-selection-site-of-hepatitis-c-virus-isolated-in-intravenous-drug-users-in-pudong-new-district-shanghai
#20
Y Wang, H Y Wu, X C Zhao, W P Zhu, Q Wan, Y H Lu, Q W Jiang
Objective: To understand the genotypes of hepatitis C virus (HCV) circulating in intravenous drug users (IDUs) in Pudong new district, Shanghai, and explore the population growth and selection pressure of the HCV strains isolated. Methods: A total of 200 serum specimens sampled from IDUs in local methadone maintenance treatment clinic in Pudong were used for amplification of a HCV NS5B 377-nt partial sequence. Mean evolutionary rate and effective number of infections were estimated based on the 377-nt partial sequences of the HCV strains isolated from IDUs and isolated contemporarily from local voluntary blood donors, men who have sex with men and reported hepatitis C cases by using BEAST software...
March 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
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