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https://www.readbyqxmd.com/read/29236288/disaster-preparedness-biological-threats-and-treatment-options
#1
Navaneeth Narayanan, Clifton R Lacy, Joseph E Cruz, Meghan Nahass, Jonathan Karp, Joseph A Barone, Evelyn Hermes-DeSantis
Biological disasters can be natural, accidental, or intentional. Biological threats have made a lasting impact on civilization. This review will focus on agents of clinical significance, bioterrorism, and national security; specifically Category A agents (anthrax, botulism, plague, tularemia, and smallpox), as well as briefly discuss other naturally-emerging infections of public health significance including Ebola virus (also a Category A agent) and Zika virus. The role of the pharmacist in disaster preparedness and disaster response is multifaceted and important...
December 13, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/29235845/structure-based-identification-of-hiv-1-nucleocapsid-protein-inhibitors-active-against-wild-type-and-drug-resistant-hiv-1-strains
#2
Mattia Mori, Lesia Kovalenko, Savina Malancona, Francesco Saladini, Davide De Forni, Manuel Pires, Nicolas Humbert, Eleonore Real, Thomas Botzanowski, Sarah Cianférani, Alessia Giannini, Maria Chiara Dasso Lang, Giulia Cugia, Barbara Poddesu, Franco Lori, Maurizio Zazzi, Steven Harper, Vincenzo Summa, Yves Mély, Maurizio Botta
HIV/AIDS is still one of the leading causes of death worldwide. Current drugs that target the canonical steps of HIV-1 life cycle are efficient in blocking viral replication, but are unable to eradicate HIV-1 from infected patients. Moreover, drug resistance (DR) is often associated with the clinical use of these molecules, thus raising the need for novel drug candidates as well as novel putative drug targets. In this respect, pharmacological inhibition of the highly conserved and multifunctional nucleocapsid protein (NC) of HIV-1 is considered a promising alternative to current drugs, particularly to overcome DR...
December 13, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/29235173/type-iv-secretion-in-gram-negative-and-gram-positive-bacteria
#3
REVIEW
Elisabeth Grohmann, Peter J Christie, Gabriel Waksman, Steffen Backert
Type IV secretion systems (T4SSs) are versatile multiprotein nanomachines spanning the entire bacterial cell envelope in Gram-negative and Gram-positive bacteria. They play important roles through the contact-dependent secretion of effector molecules into eukaryotic hosts and conjugative transfer of mobile DNA elements as well as contact-independent exchange of DNA with the extracellular milieu. In the last few years, many details on the molecular mechanisms of T4SSs have been elucidated. Exciting structures of T4SS complexes from Escherichia coli plasmids R388 and pKM101, Helicobacter pylori and Legionella pneumophila have been solved...
December 13, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/29233913/reference-quality-genome-assemblies-of-three-parastagonospora-nodorum%C3%A2-isolates-differing-in-virulence-on-wheat
#4
Jonathan K Richards, Nathan A Wyatt, Zhaohui Liu, Justin D Faris, Timothy L Friesen
Parastagonospora nodorum, the causal agent of Septoria nodorum blotch of wheat, has emerged as a model necrotrophic fungal organism for the study of host-microbe interactions. To date, three necrotrophic effectors have been identified and characterized from this pathogen, including SnToxA, SnTox1, and SnTox3. Necrotrophic effector identification was greatly aided by the development of a draft genome of Australian isolate SN15 via Sanger sequencing, yet remained largely fragmented. This research presents the development of near-finished genomes of P...
December 12, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29233878/host-pathogen-interactions-and-subversion-of-autophagy
#5
REVIEW
David G McEwan
Macroautophagy ('autophagy'), is the process by which cells can form a double-membraned vesicle that encapsulates material to be degraded by the lysosome. This can include complex structures such as damaged mitochondria, peroxisomes, protein aggregates and large swathes of cytoplasm that can not be processed efficiently by other means of degradation. Recycling of amino acids and lipids through autophagy allows the cell to form intracellular pools that aid survival during periods of stress, including growth factor deprivation, amino acid starvation or a depleted oxygen supply...
December 12, 2017: Essays in Biochemistry
https://www.readbyqxmd.com/read/29233572/hospitalization-of-hiv-positive-patients-significant-demand-affecting-all-hospital-sectors
#6
R Seng, P Mutuon, J Riou, C Duvivier, L Weiss, J D Lelievre, L Meyer, D Vittecoq, O Zak Dit Zbar, J Frenkiel, M Frank-Soltysiak, F Boue, C Rapp, A Sobel, G Brucker, C Goujard, D Salmon
BACKGROUND: In a context of the evolution of severe morbidities in patients living with HIV (PLWH), the aim of this study was to describe reasons for hospitalization and the mode of care for the patients requiring hospitalization. METHODS: All admissions (≥24h) of PLWH to 10 hospitals in the south of Paris (COREVIH Ile-de-France Sud) between 1/1/2011 and 12/31/2011 were identified. The hospital database and the file of patients followed in the HIV referral department of each hospital were matched...
December 9, 2017: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/29233073/determining-the-likely-place-of-hiv-acquisition-for-migrants-in-europe-combining-subject-specific-information-and-biomarkers-data
#7
Nikos Pantazis, Christos Thomadakis, Julia Del Amo, Debora Alvarez-Del Arco, Fiona M Burns, Ibidun Fakoya, Giota Touloumi
In most HIV-positive individuals, infection time is only known to lie between the time an individual started being at risk for HIV and diagnosis time. However, a more accurate estimate of infection time is very important in certain cases. For example, one of the objectives of the Advancing Migrant Access to Health Services in Europe (aMASE) study was to determine if HIV-positive migrants, diagnosed in Europe, were infected pre- or post-migration. We propose a method to derive subject-specific estimates of unknown infection times using information from HIV biomarkers' measurements, demographic, clinical, and behavioral data...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29230423/immune-dysfunction-in-hiv-a-possible-role-for-pro-and-anti-inflammatory-cytokines-in-hiv-staging
#8
Iorhen Ephraim Akase, Bolanle O P Musa, Reginald Onyedumarakwe Obiako, Abdurrahman Ahmad Elfulatiy, Abdullahi Asara Mohammed
HIV infection is a chronic infection that almost inevitably progresses to AIDS. The infection is characterized by the deterioration in the immune function leading to opportunistic infections and malignancies. Additionally, there is an associated immune dysfunction characterized by a persistent inflammatory state and unhealthy elaboration of both pro- and anti-inflammatory cytokines. The CD4+ T cell count has been used as a surrogate for the level of immune dysfunction that exists in patients with HIV infection...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/29230203/ibalizumab-targeting-cd4-receptors-an-emerging-molecule-in-hiv-therapy
#9
REVIEW
Simona A Iacob, Diana G Iacob
The HIV infection is responsible for the most devastating global pandemic of the last century. More than 39 million people have died of HIV/AIDS since 1981. The development of the antiretroviral (ARV) treatment begins with the discovery of zidovudine a nucleoside reverse transcriptase inhibitor. This breakthrough was followed by other ARV drug classes and representatives. Presently, HIV treatment employs 27 ARV representatives belonging to five different classes. Despite the proven benefits of ARV treatment and its long-term control of the HIV infection, there is an increasing concern about the numerous adverse effects and resistance to current ARV drugs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29228918/nevirapine-versus-efavirenz-based-antiretroviral-therapy-regimens-in-antiretroviral-naive-patients-with-hiv-and-tuberculosis-infections-in-india-a-multi-centre-study
#10
Sanjeev Sinha, Kartik Gupta, Srikanth Tripathy, Sahajal Dhooria, Sanjay Ranjan, R M Pandey
BACKGROUND: According to World Health Organization (WHO) guidelines, which have also been adopted by the National AIDS Control Organization (NACO), India, Efavirenz-based Anti-Retroviral Therapy (ART) is better in Human-Immunodeficiency-Virus (HIV)-infected patients who are also being treated with Rifampicin-based Anti-Tuberculous Therapy (ATT). However, Efavirenz is much more expensive. We hypothesize that Nevirapine is a cheaper alternative that possesses equal efficacy as Efavirenz in HIV-Tuberculosis (TB) co-infected patients...
December 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29228323/evaluation-of-a-genus-specific-elisa-and-a-commercial-aspergillus-western-blot-igg%C3%A2-immunoblot-kit-for-the-diagnosis-of-aspergillosis-in-common-bottlenose-dolphins-tursiops-truncatus
#11
Guillaume Desoubeaux, Carolina Le-Bert, Vanessa Fravel, Tonya Clauss, Alexa J Delaune, Jeny Soto, Eric D Jensen, Jennifer E Flower, Randall Wells, Gregory D Bossart, Carolyn Cray
Aspergillosis is a fungal infection with high mortality and morbidity rates. As in humans, its definitive diagnosis is difficult in animals, and thus new laboratory tools are required to overcome the diagnostic limitations due to low specificity and lack of standardization. In this study of common bottlenose dolphins (Tursiops truncatus), we evaluated the diagnostic performance of a new commercial immunoblot kit that had been initially developed for the serologic diagnosis of chronic aspergillosis in humans...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29228218/nonhuman-primate-models-and-understanding-the-pathogenesis-of-hiv-infection-and-aids
#12
Ronald S Veazey, Andrew A Lackner
Research using nonhuman primates (NHPs) as models for human immunodeficiency virus (HIV) infection and acquired immunodeficiency syndrome (AIDS) has resulted in tremendous achievements not only in the prevention and treatment of HIV, but also in biomedical research more broadly. Once considered a death sentence, HIV infection is now fairly well controlled with combination antiretroviral treatments, almost all of which were first tested for efficacy and safety in nonhuman primates or other laboratory animals...
December 8, 2017: ILAR Journal
https://www.readbyqxmd.com/read/29226632/novel-bovine-associated-pvapn-plasmid-type-in-rhodococcus-equi-identified-from-lymph-nodes-of-slaughtered-cattle-and-lungs-of-people-living-with-hiv-aids
#13
M G Ribeiro, G H B Lara, P da Silva, M M J Franco, A L de Mattos-Guaraldi, A P C de Vargas, R I Sakate, F R Pavan, B S Colhado, F V R Portilho, R G Motta, T Kakuda, S Takai
Rhodococcus equi is a well-recognized Gram-positive intracellular facultative bacterium that is opportunistic in nature, which causes pyogranulomatous infections in humans and multiple host animals. The pathogenicity of the microorganism has been attributed to the presence of plasmid-encoded virulence-associated proteins (Vap). To date, three host-associated virulence plasmid types of R. equi have been identified as follows: the circular pVAPA and pVAPB, related, respectively, to equine and porcine isolates, and a recently described linear pVAPN plasmid associated with bovine strains, although these three types are found in human isolates...
December 10, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29226015/conserved-hiv-epitopes-for-an-effective-hiv-vaccine
#14
Bikash Sahay, Cuong Q Nguyen, Janet K Yamamoto
Despite major advances in antiretroviral therapy against HIV-1, an effective HIV vaccine is urgently required to reduce the number of new cases of HIV infections in the world. Vaccines are the ultimate tool in the medical arsenal to control and prevent the spread of infectious diseases such as HIV/AIDS. Several failed phase-IIb to -III clinical vaccine trials against HIV-1 in the past generated a plethora of information that could be used for better designing of an effective HIV vaccine in the future. Most of the tested vaccine candidates produced strong humoral responses against the HIV proteins; however, failed to protect due to: 1) the low levels and the narrow breadth of the HIV-1 neutralizing antibodies and the HIV-specific antibody-dependent Fc-mediated effector activities, 2) the low levels and the poor quality of the anti-HIV T-cell responses, and 3) the excessive responses to immunodominant non-protective HIV epitopes, which in some cases blocked the protective immunity and/or enhanced HIV infection...
August 2017: Journal of Clinical & Cellular Immunology
https://www.readbyqxmd.com/read/29224754/prevalence-of-chronic-ear-disease-among-hiv-children-in-sub-saharan-africa
#15
David C Ianacone, Alden F Smith, Margaretha L Casselbrant, Robbert J H Ensink, Farrel Buchinsky, Abebe Melaku, Glenn Isaacson
OBJECTIVES: To determine the prevalence of chronic ear disease in HIV+, highly active anti-retroviral therapy (HAART)-treated children and compare this to the prevalence in healthy children of similar age living in a similar setting. INTRODUCTION: From previous clinical work in Ethiopia, we suspected that chronic middle ear disease was common both in the general pediatric population and especially among children with HIV/AIDS. Few studies have examined the prevalence of chronic ear disease in HIV + children, particularly in those treated with HAART...
December 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29224663/obstruction-of-the-biliary-and-urinary-system
#16
William O'Connell, Jay Shah, Jason Mitchell, J David Prologo, Louis Martin, Michael J Miller, Jonathan G Martin
Biliary and urinary obstructions can be managed endoscopically or cystoscopically, surgically or by percutansous intervention or drainage. If the obtructed system is infected, emergent decompression is needed. Early recognition and treatment is paramount in both conditions. Acute cholangitis can present many different ways, from mild symptoms to fulminant sepsis. It is usually a result of ascending bacterial colonization and biliary obstruction resulting in bacterial overgrowth. Therefore, those patients with recent biliary instrumentation or previous biliary modification are at higher risk...
December 2017: Techniques in Vascular and Interventional Radiology
https://www.readbyqxmd.com/read/29223514/need-for-integrative-thinking-to-fight-against-emerging-infectious-diseases-proceedings-of-the-5th-seminar-on-emerging-infectious-diseases-march-22-2016-%C3%A2-current-trends-and-proposals
#17
C Burdet, J-F Guégan, X Duval, M Le Tyrant, H Bergeron, J-C Manuguerra, J Raude, C Leport, P Zylberman
We present here the proceedings of the 5th seminar on emerging infectious diseases, held in Paris on March 22nd, 2016, with seven priority proposals that can be outlined as follows: encourage research on the prediction, screening and early detection of new risks of infection; develop research and surveillance concerning transmission of pathogens between animals and humans, with their reinforcement in particular in intertropical areas ("hot-spots") via public support; pursue aid development and support in these areas of prevention and training for local health personnel, and foster risk awareness in the population; ensure adapted patient care in order to promote adherence to treatment and to epidemic propagation reduction measures; develop greater awareness and better education among politicians and healthcare providers, in order to ensure more adapted response to new types of crises; modify the logic of governance, drawing from all available modes of communication and incorporating new information-sharing tools; develop economic research on the fight against emerging infectious diseases, taking into account specific driving factors in order to create a balance between preventive and curative approaches...
December 6, 2017: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/29221798/association-of-heterozygous-ccr5%C3%AE-32-deletion-with-survival-in-hiv-infection-a-cohort-study
#18
Ezequiel Ruiz-Mateos, Laura Tarancon-Diez, A I Alvarez-Rios, Beatriz Dominguez-Molina, Miguel Genebat, Ildefonso Pulido, Maria Antonia Abad, Maria Angeles Muñoz-Fernandez, Manuel Leal
The role of a 32 base pair deletion in the CCR5 gene (CCR5Δ32) in HIV-disease progression and response to combined antiretroviral therapy (cART) is well established. However, the impact of CCR5Δ32 in the long-term survival pre-cART and after cART introduction in a large cohort of HIV-infected patients is unknown. We analyzed the association of CCR5Δ32 deletion in the long-term survival of HIV-infected patients recruited between June 1981 and October 2016 (n = 1006). Clinical and epidemiological variables were recorded and CCR5Δ32 deletion was assessed by PCR and electrophoretic analysis...
December 5, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29220419/high-resolution-single-cell-sequencing-of-malaria-parasites
#19
Simon G Trevino, Standwell C Nkhoma, Shalini Nair, Benjamin J Daniel, Karla Moncada, Stanley Khoswe, Rachel L Banda, François Nosten, Ian H Cheeseman
Single-cell genomics is a powerful tool for determining the genetic architecture of complex communities of unicellular organisms. In areas of high transmission, malaria patients are often challenged by the activities of multiple Plasmodium falciparum lineages, which can potentiate pathology, spread drug resistance loci and also complicate most genetic analysis. Single-cell sequencing of P. falciparum would be key to understanding infection complexity, though efforts are hampered by the extreme nucleotide composition of its genome (∼80% AT-rich)...
December 6, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29220350/deep-sequencing-of-near-full-length-hiv-1-genomes-from-plasma-identifies-circulating-subtype-c-and-infrequent-occurrence-of-ac-recombinant-form-in-southern-india
#20
Shuba Varshini Alampalli, Michael M Thomson, Raghavan Sampathkumar, Karthi Sivaraman, Anto Jesuraj U K J, Chirag Dhar, George D Souza, Neil Berry, Annapurna Vyakarnam
India has the third largest number of HIV-1-infected individuals accounting for approximately 2.1 million people, with a predominance of circulating subtype C strains and a low prevalence of subtype A and A1C and BC recombinant forms, identified over the past two decades. Recovery of near full-length HIV-1 genomes from a plasma source coupled with advances in next generation sequencing (NGS) technologies and development of universal methods for amplifying whole genomes of HIV-1 circulating in a target geography or population provides the opportunity for a detailed analysis of HIV-1 strain identification, evolution and dynamics...
2017: PloS One
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