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https://www.readbyqxmd.com/read/28214184/-systemic-lupus-erythematosus-and-lymphopenia-clinical-and-pathophysiological-features
#1
M Martin, A Guffroy, X Argemi, T Martin
Lymphopenia is frequent in systemic lupus erythematosus (SLE) and profound (<500/mm(3)) in 10% of cases. T lymphocytes, especially CD4+, are more affected than B cells. The pathophysiological mechanisms are complex, involving lymphocytotoxic antibodies, excess of apoptosis, increased susceptibility of T cells to complement mediated cytolysis, as well as lymphopoiesis impairment and lymphocyte sequestration. Lymphopenia in SLE is independent from other cytopenia and immunosuppressive drug regiments, and associated with disease activity, risk of flare and damage scores...
February 14, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28214160/laboratory-based-surveillance-of-hospital-acquired-respiratory-virus-infection-in-a-tertiary-care-hospital
#2
Hye-Suk Choi, Mi-Na Kim, Heungsup Sung, Jeong-Young Lee, Hee-Youn Park, Sun-Hee Kwak, Young-Ju Lim, Min-Jee Hong, Sun-Kyung Kim, So-Yeon Park, Hyeon-Jeong Kim, Kyu-Ri Kim, Hye-Ran Choi, Jae Sim Jeong, Sang-Ho Choi
Of 7,772 laboratory-confirmed cases of respiratory viral infection among hospitalized patients, 22.8% were categorized as having hospital-acquired infection. The overall incidence of hospital-acquired respiratory viral infection was 3.9 (95% confidence interval, 3.7-4.1) cases per 1,000 admitted patients. Rhinovirus was the most common virus (30.3%), followed by influenza virus (17.6%) and parainfluenza virus (15.6%).
February 15, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28214021/arfi-elastography-changes-after-direct-acting-antiviral-treatment-in-transplanted-livers-with-relapse-of-hepatitis-c-virus-infection
#3
M Alfageme Zubillaga, T Fontanilla Echeveste, I Pérez González, A Royuela Vicente, A M Duca, R M Ruiz Peralbo, C González Hernando
OBJECTIVE: To evaluate the changes in the values obtained in acoustic radiation force impulse (ARFI) elastography of the liver after antiviral treatment in patients with liver transplants and hepatitis C virus (HVC) infection recurring after transplantation. MATERIAL AND METHODS: We studied 15 patients infected with HVC who had received liver transplants where an HVC infection recurring in the graft within one year after the transplant was treated with direct-acting antivirals...
February 14, 2017: Radiología
https://www.readbyqxmd.com/read/28213975/lab-in-a-tube-real-time-molecular-point-of-care-diagnostics-for-influenza-a-and-b-using-the-cobas%C3%A2-liat%C3%A2-system
#4
Willem Jg Melchers, Judith Kuijpers, Joanna Sickler, Janette Rahamat-Langendoen
BACKGROUND: Rapid diagnosis of influenza A and B is important for direct treatment decisions in patient care and for the reduction of in-hospital transmissions. The new real-time PCR based molecular point-of-care (POC) assay, the cobas(®) Influenza A/B test on the cobas(®) Liat® System (cobas(®) Liat® Influenza A/B assay), generated a PCR result in less than 20 minutes, was evaluated for the detection of influenza A and B. METHOD OF THE STUDY: 121 retrospectively collected respiratory specimens, previously analyzed with a routine influenza A/B test (Diagenode) were tested using the cobas(®) Liat® Influenza A/B assay...
February 18, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28213960/association-of-rhinovirus-with-exacerbations-in-young-children-affected-by-cystic-fibrosis-preliminary-data
#5
Sacha Stelzer-Braid, Nancy Liu, Michael Doumit, Russell D'Cunha, Yvonne Belessis, Adam Jaffe, William D Rawlinson
Rhinovirus (RV) is a common respiratory viral infection linked to worsening of chronic respiratory diseases including cystic fibrosis (CF) and asthma. RV was tested by RT-PCR in samples (n = 465) collected from the upper (nasal swab, oropharyngeal suction and sputum) and lower (bronchoalveolar washings) respiratory tract of 110 children with CF. Air samples (n = 52) collected from the operating theatres and outpatient clinics were tested for RV. RV was found in 43% of children <5 years suffering an exacerbation, and 12% of older children (5-17 years)...
February 18, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28213954/human-herpes-virus-6-infection-in-pediatric-organ-transplant-patients
#6
Elisa Ylinen, Silja Lehtinen, Timo Jahnukainen, Teemu Karlsson, Raisa Loginov, Laura Mannonen, Irmeli Lautenschlager, Hannu Jalanko
Transplant patients need lifelong immunosuppressive medication, but this reduces their defense mechanisms, making them prone to viral infections and reactivations. We aimed to clarify the prevalence and clinical manifestations of the human herpes virus 6 (HHV-6) infection in children after pediatric solid organ transplants. Clinical findings and viral loads were compared between primary HHV-6 infections and reactivations. The study comprised 47 kidney, 25 liver, and 12 heart transplant patients who underwent surgery from 2009 to 2014...
February 18, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28213871/thieno-2-3-b-pyridine-derivatives-a-new-class-of-antiviral-drugs-against-mayaro-virus
#7
Raquel Amorim, Marcelo Damião Ferreira de Meneses, Julio Cesar Borges, Luiz Carlos da Silva Pinheiro, Lucio Ayres Caldas, Claudio Cesar Cirne-Santos, Marcos Vinícius Palmeira de Mello, Alessandra Mendonça Teles de Souza, Helena Carla Castro, Izabel Christina Nunes de Palmer Paixão, Renata de Mendonça Campos, Ingrid E Bergmann, Viviana Malirat, Alice Maria Rolim Bernardino, Moacyr Alcoforado Rebello, Davis Fernandes Ferreira
Mayaro virus (MAYV) is an arthropod-borne virus and a member of the family Togaviridae, genus Alphavirus. Its infection leads to an acute illness accompanied by long-lasting arthralgia. To date, there are no antiviral drugs or vaccines against infection with MAYV and resources for the prevention or treatment of other alphaviruses are very limited. MAYV has served as a model to study the antiviral potential of several substances on alphavirus replication. In this work we evaluated the antiviral effect of seven new derivatives of thieno[2,3-b]pyridine against MAYV replication in a mammalian cell line...
February 17, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28213821/prevalence-of-internalized-hiv-related-stigma-among-hiv-infected-adults-in-care-united-states-2011-2013
#8
Amy R Baugher, Linda Beer, Jennifer L Fagan, Christine L Mattson, Mark Freedman, Jacek Skarbinski, R Luke Shouse
HIV-infected U.S. adults have reported internalized HIV-related stigma; however, the national prevalence of stigma is unknown. We sought to determine HIV-related stigma prevalence among adults in care, describe which socio-demographic groups bear the greatest stigma burden, and assess the association between stigma and sustained HIV viral suppression. The Medical Monitoring Project measures characteristics of U.S. HIV-infected adults receiving care using a national probability sample. We used weighted data collected from June 2011 to May 2014 and assessed self-reported internalized stigma based on agreement with six statements...
February 14, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28213500/inducible-t-cell-kinase-regulates-the-acquisition-of-cytolytic-capacity-and-degranulation-in-cd8-ctls
#9
Senta M Kapnick, Jane C Stinchcombe, Gillian M Griffiths, Pamela L Schwartzberg
Patients with mutations in inducible T cell kinase (ITK) are susceptible to viral infections, particularly EBV, suggesting that these patients have defective function of CD8(+) CTLs. In this study, we evaluated the effects of ITK deficiency on cytolysis in murine CTLs deficient in ITK, and both human and murine cells treated with an ITK inhibitor. We find that ITK deficiency leads to a global defect in the cytolysis of multiple targets. The absence of ITK both affected CTL expansion and delayed the expression of cytolytic effectors during activation...
February 17, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28213497/mitochondrial-damage-elicits-a-tcdd-inducible-poly-adp-ribose-polymerase-mediated-antiviral-response
#10
Tatsuya Kozaki, Jun Komano, Daiki Kanbayashi, Michihiro Takahama, Takuma Misawa, Takashi Satoh, Osamu Takeuchi, Taro Kawai, Shigeomi Shimizu, Yoshiharu Matsuura, Shizuo Akira, Tatsuya Saitoh
The innate immune system senses RNA viruses by pattern recognition receptors (PRRs) and protects the host from virus infection. PRRs mediate the production of immune modulatory factors and direct the elimination of RNA viruses. Here, we show a unique PRR that mediates antiviral response. Tetrachlorodibenzo-p-dioxin (TCDD)-inducible poly(ADP ribose) polymerase (TIPARP), a Cysteine3 Histidine (CCCH)-type zinc finger-containing protein, binds to Sindbis virus (SINV) RNA via its zinc finger domain and recruits an exosome to induce viral RNA degradation...
February 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28213271/woodchuck-sodium-taurocholate-cotransporting-polypeptide-supports-low-level-hepatitis-b-and-d-virus-entry
#11
Liran Fu, Hongjie Hu, Yang Liu, Zhiyi Jing, Wenhui Li
Sodium taurocholate cotransporting polypeptide (NTCP) is the functional receptor for human hepatitis B virus (HBV) and its satellite hepatitis D virus (HDV). Species barriers to HBV/HDV infection are mainly determined at entry level by variations in the sequences of particular NTCP orthologs. In this study, we sought to determine whether the NTCP ortholog in woodchuck (Marmota monax), woodchuck NTCP (wNTCP) supports viral infection. We found that wNTCP is capable of supporting HBV/HDV infection in HepG2 cells, but to much lower extent than human NTCP (hNTCP), which is about 90% reduction of hNTCP...
February 14, 2017: Virology
https://www.readbyqxmd.com/read/28213165/hbvcircle-a-novel-tool-to-investigate-hepatitis-b-virus-covalently-closed-circular-dna
#12
Zhipeng Yan, Jing Zeng, Youjun Yu, Kunlun Xiang, Hui Hu, Xue Zhou, Lili Gu, Li Wang, Jie Zhao, John A T Young, Lu Gao
BACKGROUND & AIMS: Hepatitis B virus (HBV) covalently closed circular DNA (cccDNA) persists as a stable episome in infected hepatocytes and serves as a template for the transcription of all viral genes. Due to the narrow host range of HBV, the development of a robust mouse model that supports cccDNA-dependent viral replication is a key hurdle in the development of novel HBV therapeutics. This study aimed to develop a novel tool to investigate HBV cccDNA. METHODS: Through minicircle technology, HBVcircle, a recombinant cccDNA, was easily generated and extracted from a genetically engineered E...
February 14, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28212984/hiv-1-vpr-disrupts-mitochondria-axonal-transport-and-accelerates-neuronal-aging
#13
Ying Wang, Maryline Santerre, Italo Tempera, Kayla Martin, Ruma Mukerjee, Bassel E Sawaya
Disruption of mitochondria axonal transport, essential for the maintenance of synaptic and neuronal integrity and function, has been identified in neurodegenerative diseases. Whether HIV-1 viral proteins affect mitochondria axonal transport is unknown, albeit HIV-associated neurocognitive disorders occur in around half of the patients living with HIV. Therefore, we sought to examine the effect of HIV-1 viral protein R (Vpr) on mitochondria axonal transport. Using mice primary neuronal cultures, we demonstrated that 4-day Vpr treatment reduced the ratio of moving mitochondria associated with (i) less energy (ATP) supply, (ii) reduction in Miro-1 and (iii) increase of α-synuclein which led to loss of microtubule stability as demonstrated by inconsecutive distribution of acetylated α-tubulin along the axons...
February 14, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28212672/cytokeratin7-and-cytokeratin19-expression-in-high-grade-cervical-intraepithelial-neoplasm-and-squamous-cell-carcinoma-and-their-possible-association-in-cervical-carcinogenesis
#14
Hojung Lee, Hyekyung Lee, Yong Kyun Cho
BACKGROUND: High risk human papillomavirus (HR HPV) infects cells at the squamocolumnar junction (SCJ) of the cervix, causing cancer. Cytokeratin (CK)7 is an SCJ marker, and stains cervical neoplasia. CK19 is a binding partner of CK7 and expressed in cervical cancer. Despite this possible association between CK7/CK19 and cervical cancer, not much is known about the mechanism of CK7/CK19 involvement in HR HPV-mediated cervical carcinogenesis. METHODS: We analyzed the expression pattern of CK7, CK19, and p16 by using immunohistochemistry and HPV infection by in situ hybridization in 25 cases of high grade cervical intraepithelial neoplasia (CIN3) and in 30 cases of squamous cell carcinoma (SCC)...
February 17, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28212619/brain-and-liver-pathology-amyloid-deposition-and-interferon-responses-among-older-hiv-positive-patients-in-the-late-haart-era
#15
Isaac H Solomon, Umberto De Girolami, Sukrutha Chettimada, Vikas Misra, Elyse J Singer, Dana Gabuzda
BACKGROUND: HIV+ patients on highly active antiretroviral therapy (HAART) with suppressed viral loads have a low incidence of HIV-associated dementia, but increased prevalence of milder forms of HIV-associated neurocognitive disorders (HAND). These milder forms of HAND are often associated with minimal histological abnormalities, and their pathophysiology is unclear. Comorbidities, altered amyloid metabolism, accelerated brain aging, and activated interferon responses are suspected to play a role in HAND pathogenesis in HAART-treated persons...
February 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28212581/the-inhibiting-effect-of-the-transcription-factor-p53-on-dengue-virus-infection-by-activating-the-type-i-interferon
#16
Yan-Ling Hu, Xiao-Shan Li, Shu Xiong, Qiang Ma, Dan Liu, Zhong-Quan Shi, Jing Tang, Xian-Cai Rao, Fu-Quan Hu, Guo-Li Li
To investigate the role of the transcription factor p53 in the course of the dengue virus (DV) infection. The human hepatocellular carcinoma cell strain HepG2 with a low expression level of p53 was built by using the retroviral-mediated RNA interference technology, and was detected by Western blot. The wild group and the interference group were respectively infected by the type 2 DV. The viral titration was detected by the Vero plaque assay, the viral multiplication was detected by the immunofluorescence, the cell apoptosis after virus infection was detected by FCM and the level of IFN-β was analyzed by ELISA...
February 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28212428/a-novel-hemagglutinin-protein-produced-in-bacteria-protects-chickens-against-h5n1-highly-pathogenic-avian-influenza-viruses-by-inducing-h5-subtype-specific-neutralizing-antibodies
#17
Violetta Sączyńska, Agnieszka Romanik, Katarzyna Florys, Violetta Cecuda-Adamczewska, Małgorzata Kęsik-Brodacka, Krzysztof Śmietanka, Monika Olszewska, Katarzyna Domańska-Blicharz, Zenon Minta, Bogusław Szewczyk, Grażyna Płucienniczak, Andrzej Płucienniczak
The highly pathogenic (HP) H5N1 avian influenza viruses (AIVs) cause a mortality rate of up to 100% in infected chickens and pose a permanent pandemic threat. Attempts to obtain effective vaccines against H5N1 HPAIVs have focused on hemagglutinin (HA), an immunodominant viral antigen capable of eliciting neutralizing antibodies. The vast majority of vaccine projects have been performed using eukaryotic expression systems. In contrast, we used a bacterial expression system to produce vaccine HA protein (bacterial HA) according to our own design...
2017: PloS One
https://www.readbyqxmd.com/read/28212379/distribution-and-abundance-of-key-vectors-of-rift-valley-fever-and-other-arboviruses-in-two-ecologically-distinct-counties-in-kenya
#18
Rosemary Sang, Samwel Arum, Edith Chepkorir, Gladys Mosomtai, Caroline Tigoi, Faith Sigei, Olivia Wesula Lwande, Tobias Landmann, Hippolyte Affognon, Clas Ahlm, Magnus Evander
BACKGROUND: Rift Valley fever (RVF) is a mosquito-borne viral zoonosis of ruminants and humans that causes outbreaks in Africa and the Arabian Peninsula with significant public health and economic consequences. Humans become infected through mosquito bites and contact with infected livestock. The virus is maintained between outbreaks through vertically infected eggs of the primary vectors of Aedes species which emerge following rains with extensive flooding. Infected female mosquitoes initiate transmission among nearby animals, which amplifies virus, thereby infecting more mosquitoes and moving the virus beyond the initial point of emergence...
February 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28212352/rta-occupancy-of-the-origin-of-lytic-replication-during-murine-gammaherpesvirus-68-reactivation-from-b-cell-latency
#19
Alexis L Santana, Darby G Oldenburg, Varvara Kirillov, Laraib Malik, Qiwen Dong, Roman Sinayev, Kenneth B Marcu, Douglas W White, Laurie T Krug
RTA, the viral Replication and Transcription Activator, is essential for rhadinovirus lytic gene expression upon de novo infection and reactivation from latency. Lipopolysaccharide (LPS)/toll-like receptor (TLR)4 engagement enhances rhadinovirus reactivation. We developed two new systems to examine the interaction of RTA with host NF-kappaB (NF-κB) signaling during murine gammaherpesvirus 68 (MHV68) infection: a latent B cell line (HE-RIT) inducible for RTA-Flag expression and virus reactivation; and a recombinant virus (MHV68-RTA-Bio) that enabled in vivo biotinylation of RTA in BirA transgenic mice...
February 16, 2017: Pathogens
https://www.readbyqxmd.com/read/28212332/type-1-diabetes-candidate-genes-linked-to-pancreatic-islet-cell-inflammation-and-beta-cell-apoptosis
#20
REVIEW
Joachim Størling, Flemming Pociot
Type 1 diabetes (T1D) is a chronic immune-mediated disease resulting from the selective destruction of the insulin-producing pancreatic islet β-cells. Susceptibility to the disease is the result of complex interactions between environmental and genetic risk factors. Genome-wide association studies (GWAS) have identified more than 50 genetic regions that affect the risk of developing T1D. Most of these susceptibility loci, however, harbor several genes, and the causal variant(s) and gene(s) for most of the loci remain to be established...
February 16, 2017: Genes
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