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ANTIVIRAL DRUGS

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https://www.readbyqxmd.com/read/28719029/directly-observed-therapy-of-sofosbuvir-ribavirin-peginterferon-with-minimal-monitoring-for-the-treatment-of-chronic-hepatitis-c-in-people-with-a-history-of-drug-use-in-chennai-india-c-dot
#1
Sunil S Solomon, Mark S Sulkowski, Pradeep Amrose, Aylur K Srikrishnan, Allison M McFall, Balakrishnan Ramasamy, Muniratnam S Kumar, Santhanam Anand, David L Thomas, Shruti H Mehta
BACKGROUND AND AIMS: We assessed the feasibility of field-based directly observed therapy (DOT) with minimal monitoring to deliver HCV treatment to people with a history of drug use in Chennai, India. METHODS: 50 participants were randomized 1:1 to sofosbuvir + peginterferon alfa 2a + ribavirin (SOF+PR) for 12 weeks (Arm 1) vs. sofosbuvir + ribavirin (SOF+R) for 24 weeks (Arm 2). SOF+R was delivered daily at participant chosen venues and weekly peginterferon injections at the study clinic...
July 18, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28716571/antiviral-effect-of-forsythoside-a-from-forsythia-suspensa-thunb-vahl-fruit-against-influenza-a-virus-through-reduction-of-viral-m1-protein
#2
Anna Hing-Yee Law, Cindy Lai-Hung Yang, Allan Sik-Yin Lau, Godfrey Chi-Fung Chan
ETHNOPHARMACOLOGICAL RELEVANCE: Yinqiaosan is a classical traditional Chinese medicine formula, which has been used to treat respiratory diseases since ancient China. It consists of nine herbs and among them, Forsythia suspensa (Thunb.) Vahl fruit is one of the major herbal components. Despite the long history of Yinqiaosan, the active compounds and the mechanisms of action of this formula remain elusive. AIM OF THE STUDY: The present study aimed to examine the suppressive effect of Yinqiaosan on influenza virus and to identify the active components in the formula targeting influenza...
July 14, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28713784/identification-of-novel-and-efficacious-chemical-compounds-that-disturb-influenza-a-virus-entry-in-vitro
#3
Hany Khalil, Tamer El Malah, Ahmed I Abd El Maksoud, Ibrahim El Halfawy, Ahmed A El Rashedy, Mahmoud El Hefnawy
Influenza A virus is a negative RNA stranded virus of the family Orthomyxoviridae, and represents a major public health threat, compounding existing disease conditions. Influenza A virus replicates rapidly within its host and the segmented nature of its genome facilitates re-assortment, whereby whole genes are exchanged between influenza virus subtypes during replication. Antiviral medications are important pharmacological tools in influenza virus prophylaxis and therapy. However, the use of currently available antiviral is impeded by sometimes high levels of resistance in circulating virus strains...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28712845/dual-inhibitors-of-the-human-blood-brain-barrier-drug-efflux-transporters-p-glycoprotein-and-abcg2-based-on-the-antiviral-azidothymidine
#4
Hilda A Namanja-Magliano, Kelsey Bohn, Neha Agrawal, Meghan E Willoughby, Christine A Hrycyna, Jean Chmielewski
The brain provides a sanctuary site for HIV due, in part, to poor penetration of antiretroviral agents at the blood-brain barrier. This lack of penetration is partially attributed to drug efflux transporters such as P-glycoprotein (P-gp) and ABCG2. Inhibition of both ABCG2 and P-gp is critical for enhancing drug accumulation into the brain. In this work, we have developed a class of homodimers based on the HIV reverse transcriptase inhibitor azidothymidine (AZT) that effectively inhibits P-gp and ABCG2. These agents block transporter mediated efflux of the P-gp substrate calcein-AM and the ABCG2 substrate mitoxantrone...
July 6, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28711760/investigation-of-the-binding-free-energies-of-fda-approved-drugs-against-subtype-b-and-c-sa-hiv-pr-oniom-approach
#5
Z K Sanusi, T Govender, G E M Maguire, S B Maseko, J Lin, H G Kruger, B Honarparvar
Human immune virus subtype C is the most widely spread HIV subtype in Sub-Sahara Africa and South Africa. A profound structural insight on finding potential lead compounds is therefore necessary for drug discovery. The focus of this study is to rationalize the nine Food and Drugs Administration (FDA) HIV antiviral drugs complexed to subtype B and C-SA PR using ONIOM approach. To achieve this, an integrated two-layered ONIOM model was used to optimize the geometrics of the FDA approved HIV-1 PR inhibitors for subtype B...
June 29, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28709658/ngago-gdna-system-efficiently-suppresses-hepatitis-b-virus-replication-through-accelerating-decay-of-pregenomic-rna
#6
Zhuanchang Wu, Siyu Tan, Leiqi Xu, Lifen Gao, Haizhen Zhu, Chunhong Ma, Xiaohong Liang
Covalently closed circular DNA (cccDNA) in the hepatocytes nucleus is responsible for persistent infection of Hepatitis B virus (HBV). Current antiviral therapy drugs nucleos(t)ide analogs or interferon fail to eradicate HBV cccDNA. Genome editing technique provides an effective approach for HBV treatment through targeting viral cccDNA. Natronobacterium gregoryi Argonaute (NgAgo)-guide DNA (gDNA) system with powerful genome editing prompts us to explore its application in inhibiting HBV replication. Preliminary function verification indicated that NgAgo/EGFP-gDNA obviously inhibited EGFP expression...
July 11, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28709657/detection-of-the-hepatitis-b-virus-hbv-covalently-closed-circular-dna-cccdna-in-mice-transduced-with-a-recombinant-aav-hbv-vector
#7
Julie Lucifora, Anna Salvetti, Xavier Marniquet, Laurent Mailly, Barbara Testoni, Floriane Fusil, Aurore Inchauspé, Maud Michelet, Marie-Louise Michel, Massimo Levrero, Pierre Cortez, Thomas F Baumert, François-Loic Cosset, Cécile Challier, Fabien Zoulim, David Durantel
Hepatitis B Virus (HBV) persists in infected hepatocytes as an episomal covalently-closed-circular DNA mini-chromosome, called cccDNA. As the main nuclear transcription template, HBV cccDNA is a key replication intermediate in the viral life cycle. Little is known about the mechanisms involved in its formation, maintenance and fate under antiviral therapies. This is mainly due to the lack of small immune-competent animal models able to recapitulate the entire HBV replication cycle, including formation of HBV cccDNA...
July 11, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28709400/broad-range-potential-of-asphodelus-microcarpus-leaves-extract-for-drug-development
#8
Amalia Di Petrillo, Antonella Fais, Francesca Pintus, Celestino Santos-Buelga, Ana M González-Paramás, Vincenzo Piras, Germano Orrù, Antonello Mameli, Enzo Tramontano, Aldo Frau
BACKGROUND: Many plants have been used in traditional medicine for their antibacterial, antifungal, antiprotozoal, antiviral, antidiarrhoeal, analgesic, antimalarial, antioxidant, anti-inflammatory and anticancer activities. In order to find novel antimicrobial and antiviral agents, the aim of the present study was the evaluation of the antibacterial and antibiofilm susceptibility of Asphodelus microcarpus leaves extract. Moreover, the antiviral activity and the phytochemical composition of the active extract were also determined...
July 14, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28709136/tetracyclines-as-a-potential-antiviral-therapy-against-crimean-congo-hemorrhagic-fever-virus-docking-and-molecular-dynamic-studies
#9
Amirhossein Sharifi, Arash Amanlou, Faezeh Moosavi-Movahedi, Sahand Golestanian, Massoud Amanlou
Crimean-Congo Hemorrhagic Fever Virus (CCHFV) is one of the deadliest human diseases with mortality rate near 50%. Special attention should be paid to this virus since there is no approved treatment for it. On the other hand, the recent outbreak of Ebola virus which is a member of hemorrhagic fever viruses shows this group of viruses can be extremely dangerous. Previous studies have indicated that nucleoprotein of CCHFV, a pivotal protein in virus replication, is an appropriate target for antiviral drug development...
July 1, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28709128/identification-and-interconversion-of-isomeric-4-5-functionalized-1-2-3-thiadiazoles-and-1-2-3-triazoles-in-conditions-of-electrospray-ionization
#10
D M Mazur, M E Zimens, V A Bakulev, A T Lebedev
1,2,3-Triazoles and 1,2,3-thiadiazoles have been receiving permanent interest due to their exciting chemical reactivity and interesting biological properties including antibacterial, anticancer and antiviral activities. There are four compounds bearing 1H-1,2,3-triazole core in clinical studies which may appear in the market of drugs in nearest future. Definitely reliable methods of their identification and quantification should be developed by that time. Mass spectrometry showed itself as the most reliable method of analysis when dealing with trace levels of organic compounds in the mixtures and in the most complex matrices, including biological ones...
July 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28708843/prevalence-of-respiratory-viruses-among-adults-by-season-age-respiratory-tract-region-and-type-of-medical-unit-in-paris-france-from-2011-to-2016
#11
Benoit Visseaux, Charles Burdet, Guillaume Voiriot, François-Xavier Lescure, Taous Chougar, Olivier Brugière, Bruno Crestani, Enrique Casalino, Charlotte Charpentier, Diane Descamps, Jean-François Timsit, Yazdan Yazdanpanah, Nadhira Houhou-Fidouh
BACKGROUND: Multiplex PCR tests have improved our understanding of respiratory viruses' epidemiology by allowing their wide range detection. We describe here the burden of these viruses in hospital settings over a five-year period. METHODS: All respiratory samples from adult patients (>20 years old) tested by multiplex-PCR at the request of physicians, from May 1 2011 to April 30 2016, were included retrospectively. Viral findings are reported by season, patient age group, respiratory tract region (upper or lower) and type of clinical unit (intensive care unit, pneumology unit, lung transplantation unit and other medical units)...
2017: PloS One
https://www.readbyqxmd.com/read/28708211/direct-acting-antivirals-for-hepatitis-c-virus-in-patients-on-maintenance-dialysis
#12
Fabrizio Fabrizi, Francesca M Donato, Piergiorgio Messa
The frequency of hepatitis C virus (HCV) infection remains high in patients with chronic kidney disease (CKD) and plays a detrimental role in mortality in this population. According to the latest survey, the adjusted hazard ratio for HCV-positive versus HCV-negative patients on long-term dialysis was 1.12 (95% CI, 1.05 to 1.20) and 1.10 (95% CI, 0.98 to 1.22) for all-cause and cardiovascular mortality, respectively. An impairment on quality of life has also been documented in HCV-infected patients undergoing regular dialysis...
July 8, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28707063/liquid-chromatography-mass-spectrometry-methods-for-the-intracellular-determination-of-drugs-and-their-metabolites-a-focus-on-antiviral-drugs
#13
REVIEW
Pierre-André Billat, Franck Saint-Marcoux
Understanding the efficacy and/or toxicity of most drugs requires effective intracellular measurements of the drug and its metabolites. Nevertheless, the most common plasma marker of the biological effect of the drug is the area under the curve. Compared with drug determination in whole blood or urine, various difficulties occur in the development of analytical methods for intracellular measurements. We propose step-by-step guidelines to develop an analytical method exploring intracellular concentrations of antivirals and/or their metabolites...
July 13, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28706414/risk-of-hepatitis-b-reactivation-in-patients-treated-with-direct-acting-antivirals-for-hepatitis-c
#14
EDITORIAL
Ioanna Aggeletopoulou, Christos Konstantakis, Spilios Manolakopoulos, Christos Triantos
The recent introduction of direct-acting antiviral drugs (DAAs) for treatment of the hepatitis C virus (HCV) has greatly improved the management of HCV for infected patients. These viral protein inhibitors act rapidly, allowing HCV clearance and increasing the sustained virological response rates. However, hepatitis B virus (HBV) reactivation has been reported in HCV/HBV co-infected patients. Hepatitis B reactivation refers to an abrupt increase in the HBV and is well-documented in patients with previously undetected HBV DNA due to inactive or resolved HBV infection...
June 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28705625/antiviral-activity-of-gemcitabine-against-human-rhinovirus-in%C3%A2-vitro-and-in%C3%A2-vivo
#15
Jae-Hyoung Song, Seong-Ryeol Kim, Eun-Young Heo, Jae-Young Lee, Dong-Eun Kim, Sungchan Cho, Sun-Young Chang, Byung-Il Yoon, Jeongmin Seong, Hyun-Jeong Ko
Rhinovirus, a major causative agent of the common cold, is associated with exacerbation of asthma and chronic obstructive pulmonary disease. Currently, there is no antiviral treatment or vaccine for human rhinovirus (HRV). Gemcitabine (2',2'-difluorodeoxycytidine, dFdC) is a deoxycytidine analog with antiviral activity against rhinovirus, as well as enterovirus 71, in vitro. However, the antiviral effects of gemcitabine in vivo have not been investigated. In the current study, we assessed whether gemcitabine mediated antiviral effects in the murine HRV infection model...
July 11, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28702009/crm1-inhibitors-for-antiviral-therapy
#16
REVIEW
Cynthia Mathew, Reena Ghildyal
Infectious diseases are a major global concern and despite major advancements in medical research, still cause significant morbidity and mortality. Progress in antiviral therapy is particularly hindered by appearance of mutants capable of overcoming the effects of drugs targeting viral components. Alternatively, development of drugs targeting host proteins essential for completion of viral lifecycle holds potential as a viable strategy for antiviral therapy. Nucleocytoplasmic trafficking pathways in particular are involved in several pathological conditions including cancer and viral infections, where hijacking or alteration of function of key transporter proteins, such as Chromosome Region Maintenance1 (CRM1) is observed...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28701955/therapeutic-properties-of-bioactive-compounds-from-different-honeybee-products
#17
REVIEW
Laura Cornara, Marco Biagi, Jianbo Xiao, Bruno Burlando
Honeybees produce honey, royal jelly, propolis, bee venom, bee pollen, and beeswax, which potentially benefit to humans due to the bioactives in them. Clinical standardization of these products is hindered by chemical variability depending on honeybee and botanical sources, but different molecules have been isolated and pharmacologically characterized. Major honey bioactives include phenolics, methylglyoxal, royal jelly proteins (MRJPs), and oligosaccharides. In royal jelly there are antimicrobial jelleins and royalisin peptides, MRJPs, and hydroxy-decenoic acid derivatives, notably 10-hydroxy-2-decenoic acid (10-HDA), with antimicrobial, anti-inflammatory, immunomodulatory, neuromodulatory, metabolic syndrome preventing, and anti-aging activities...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28701904/medical-and-behavioral-approaches-to-engage-people-who-inject-drugs-into-care-for-hepatitis-c-virus-infection
#18
Stevan A Gonzalez, Daniel S Fierer, Andrew H Talal
Direct-acting antivirals for hepatitis C virus infection may revolutionize treatment among persons with substance use disorders. Despite persons with substance use disorders having the highest hepatitis C virus prevalence and incidence, the vast majority have not engaged into care for the infection. Previously, interferon-based treatments, with substantial side effects and the propensity to exacerbate mental health conditions, were major disincentives to pursuit of care for the infection. Direct-acting antivirals with viral eradication rates of >90%, significantly improved side effect profiles, and shorter treatment duration are dramatic improvements over prior treatment regimens that should promote widespread hepatitis C virus care among persons with substance use disorders...
June 2017: Addictive Disorders & Their Treatment
https://www.readbyqxmd.com/read/28700622/modelling-the-emergence-of-influenza-drug-resistance-the-roles-of-surface-proteins-the-immune-response-and-antiviral-mechanisms
#19
Hana M Dobrovolny, Catherine A A Beauchemin
The emergence of influenza drug resistance has become of particular interest as current planning for an influenza pandemic involves using massive amounts of antiviral drugs. We use semi-stochastic simulations to examine the emergence of drug resistant mutants during the course of a single infection within a patient in the presence and absence of antiviral therapy. We specifically examine three factors and their effect on the emergence of drug-resistant mutants: antiviral mechanism, the immune response, and surface proteins...
2017: PloS One
https://www.readbyqxmd.com/read/28700391/human-t-lymphotropic-virus-type-1-infection-and-disease-in-spain
#20
Carmen de Mendoza, Estrella Caballero, Antonio Aguilera, Silvia Requena, Raúl Ortiz de Lejarazu, María Pirón, Rocío González, Ana Jiménez, Lourdes Roc, Ana Treviño, Rafael Benito, Miriam Fernández-Alonso, Aitziber Aguinaga, Carmen Rodríguez, Juan García-Costa, Lidia Blanco, José M Ramos, Enrique Calderón, José M Eirós, Silvia Sauleda, Pablo Barreiro, Vicente Soriano
: Human T-lymphotropic virus type 1 (HTLV-1) infection is a neglected disease despite roughly 15 million people are chronically infected worldwide. Lifelong less than 10% of carriers develop life-threatening diseases, mostly a subacute myelopathy known as tropical spastic paraparesis (TSP) and a lymphoproliferative disorder named adult T-cell leukemia (ATL). HTLV-1 is efficiently transmitted perinatally (breastfeeding), sexually (more from men to women) and parenterally (transfusions, injection drug user (IDU), and transplants)...
July 31, 2017: AIDS
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