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Resultados  1-12 de 636

Synthesis of Pyrazine-1,3-thiazine Hybrid Analogues as Antiviral Agent Against HIV-1, Influenza A (H1N1), Enterovirus 71 (EV71), and Coxsackievirus B3 (CVB3).

Autor(es): Wu, Hong-Min; Zhou, Kuo; Wu, Tao; Cao, Yin-Guang
Fuente: Chem Biol Drug Des;88(3): 411-21, 2016 Sep.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 27062664
Resumen: A novel series of pyrazine-1,3-thiazine hybrid conjugates were synthesized in excellent yield. These derivatives were subsequently tested against human immunodeficiency virus (HIV-1); hemagglutinin type 1 and neuraminidase type 1-'influenza' A (H1N1) virus; enterovirus 71 (EV71); and coxsackievirus B3. The effect of these conjugates on the key enzymes responsible for the progression of these viral infections was also illustrated via enzyme-based assay, such as HIV-1 reverse transcriptase (R (mas)

Antiviral susceptibility of influenza viruses isolated from patients pre- and post-administration of favipiravir.

Autor(es): Takashita, Emi; Ejima, Miho; Ogawa, Rie; Fujisaki, Seiichiro; Neumann, Gabriele; Furuta, Yousuke; Kawaoka, Yoshihiro; Tashiro, Masato; Odagiri, Takato
Fuente: Antiviral Res;132: 170-7, 2016 Aug.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 27321665
Resumen: Favipiravir, a viral RNA-dependent RNA polymerase inhibitor, has recently been approved in Japan for influenza pandemic preparedness. Here, we conducted a cell-based screening system to evaluate the susceptibility of influenza viruses to favipiravir. In this assay, the antiviral activity of favipiravir is determined by inhibition of virus-induced cytopathic effect, which can be measured by using a colorimetric cell proliferation assay. To demonstrate the robustness of the assay, we compared (mas)

A High Throughput Assay for Screening Host Restriction Factors and Antivirals Targeting Influenza A Virus.

Autor(es): Wang, Lingyan; Li, Wenjun; Li, Shitao
Fuente: Front Microbiol;7: 858, 2016.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 27375580
Resumen: Influenza A virus (IAV) is a human respiratory pathogen that causes seasonal epidemics and occasional global pandemics with devastating levels of morbidity and mortality. Currently approved treatments against influenza are losing effectiveness, as new viral strains are often refractory to conventional treatments. Thus, there is an urgent need to find new therapeutic targets with which to develop novel antiviral drugs. The common strategy to discover new drug targets and antivirals is high t (mas)

Preserved antiviral adaptive immunity following polyclonal antibody immunotherapy for severe murine influenza infection.

Autor(es): Stevens, Natalie E; Hatjopolous, Antoinette; Fraser, Cara K; Alsharifi, Mohammed; Diener, Kerrilyn R; Hayball, John D
Fuente: Sci Rep;6: 29154, 2016.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 27380890
Resumen: Passive immunotherapy may have particular benefits for the treatment of severe influenza infection in at-risk populations, however little is known of the impact of passive immunotherapy on the formation of memory responses to the virus. Ideally, passive immunotherapy should attenuate the severity of infection while still allowing the formation of adaptive responses to confer protection from future exposure. In this study, we sought to determine if administration of influenza-specific ovine (mas)

Antiviral activity of hydroalcoholic extract from Eupatorium perfoliatum L. against the attachment of influenza A virus.

Autor(es): Derksen, Andrea; Kühn, Joachim; Hafezi, Wali; Sendker, Jandirk; Ehrhardt, Christina; Ludwig, Stephan; Hensel, Andreas
Fuente: J Ethnopharmacol;188: 144-52, 2016 Jul 21.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 27178637
Resumen: ETHNOPHARMACOLOGICAL RELEVANCE: Aerial parts of Eupatorium perfoliatum have been traditionally used by American natives as a treatment for fever and infections. Also modern phytotherapy in Europe documents the use of hydroalcoholic extracts of this herbal material for the treatment of infections of the upper respiratory tract. AIM OF THE STUDY: The aim of the present study was to characterize the anti-influenza A virus (IAV) potential of extracts derived from the aerial parts of E. perfolia (mas)

1,6-Bis[(benzyloxy)methyl]uracil derivatives-Novel antivirals with activity against HIV-1 and influenza H1N1 virus.

Autor(es): Geisman, Alexander N; Valuev-Elliston, Vladimir T; Ozerov, Alexander A; Khandazhinskaya, Anastasia L; Chizhov, Alexander O; Kochetkov, Sergey N; Pannecouque, Christophe; Naesens, Lieve; Seley-Radtke, Katherine L; Novikov, Mikhail S
Fuente: Bioorg Med Chem;24(11): 2476-85, 2016 Jun 1.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 27112451
Resumen: A series of 1,6-bis[(benzyloxy)methyl]uracil derivatives combining structural features of both diphenyl ether and pyridone types of NNRTIs were synthesized. Target compounds were found to inhibit HIV-1 reverse transcriptase at micro- and submicromolar levels of concentrations and exhibited anti-HIV-1 activity in MT-4 cell culture, demonstrating resistance profile similar to first generation NNRTIs. The synthesized compounds also showed profound activity against influenza virus (H1N1) in MDC (mas)

In vitro and in vivo mechanism of immunomodulatory and antiviral activity of Edible Bird's Nest (EBN) against influenza A virus (IAV) infection.

Autor(es): Haghani, Amin; Mehrbod, Parvaneh; Safi, Nikoo; Aminuddin, Nur Ain; Bahadoran, Azadeh; Omar, Abdul Rahman; Ideris, Aini
Fuente: J Ethnopharmacol;185: 327-40, 2016 Jun 5.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 26976767
Resumen: ETHNOPHARMACOLOGICAL RELEVANCE: For centuries, Edible Bird Nest (EBN) has been used in treatment of variety of respiratory diseases such as flu and cough as a Chinese natural medicine. AIM OF THE STUDY: This natural remedy showed the potential to inhibit influenza A virus (IAV). However, little is known about the mechanism of this process and also the evaluation of this product in an animal model. Hence, the current study was designed to elucidate the antiviral and immunomodulatory effects (mas)

Neuraminidase Activity and Resistance of 2009 Pandemic H1N1 Influenza Virus to Antiviral Activity in Bronchoalveolar Fluid.

Autor(es): Ruangrung, Kanyarat; Suptawiwat, Ornpreya; Maneechotesuwan, Kittipong; Boonarkart, Chompunuch; Chakritbudsabong, Warunya; Assawabhumi, Jirawatna; Bhattarakosol, Parvapan; Uiprasertkul, Mongkol; Puthavathana, Pilaipan; Wiriyarat, Witthawat; Jongkaewwattana, Anan; Auewarakul, Prasert
Fuente: J Virol;90(9): 4637-46, 2016 May 1.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 26912622
Resumen: UNLABELLED: Human bronchoalveolar fluid is known to have anti-influenza activity. It is believed to be a frontline innate defense against the virus. Several antiviral factors, including surfactant protein D, are believed to contribute to the activity. The 2009 pandemic H1N1 influenza virus was previously shown to be less sensitive to surfactant protein D. Nevertheless, whether different influenza virus strains have different sensitivities to the overall anti-influenza activity of human bron (mas)

Mx1 reveals innate pathways to antiviral resistance and lethal influenza disease.

Autor(es): Pillai, Padmini S; Molony, Ryan D; Martinod, Kimberly; Dong, Huiping; Pang, Iris K; Tal, Michal C; Solis, Angel G; Bielecki, Piotr; Mohanty, Subhasis; Trentalange, Mark; Homer, Robert J; Flavell, Richard A; Wagner, Denisa D; Montgomery, Ruth R; Shaw, Albert C; Staeheli, Peter; Iwasaki, Akiko
Fuente: Science;352(6284): 463-6, 2016 Apr 22.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 27102485
Resumen: Influenza A virus (IAV) causes up to half a million deaths worldwide annually, 90% of which occur in older adults. We show that IAV-infected monocytes from older humans have impaired antiviral interferon production but retain intact inflammasome responses. To understand the in vivo consequence, we used mice expressing a functional Mx gene encoding a major interferon-induced effector against IAV in humans. In Mx1-intact mice with weakened resistance due to deficiencies in Mavs and Tlr7, we f (mas)

Outcomes and Prognostic Features of Patients With Influenza Requiring Hospitalization and Receiving Early Antiviral Therapy: A Prospective Multicenter Cohort Study.

Autor(es): Maruyama, Takaya; Fujisawa, Takao; Suga, Shigeru; Nakamura, Haruna; Nagao, Mizuho; Taniguchi, Kiyosu; Tsutsui, Kiyoyuki; Ihara, Toshiaki; Niederman, Michael S
Fuente: Chest;149(2): 526-34, 2016 Feb.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 26203671
Resumen: BACKGROUND: In Japan, the routine use of early antiviral therapy for patients with influenza is standard. METHODS: This multicenter prospective cohort evaluation of hospitalized patients with laboratory-confirmed influenza identified prognostic factors among the patients receiving antiviral therapy. RESULTS: Of 1,345 patients with influenza (766 pediatric, 579 adult), excluding those aged < 1 year (who are not approved for antiviral therapy), 97.7% (1,224 of 1,253) received antiviral therap (mas)

DDX3 Interacts with Influenza A Virus NS1 and NP Proteins and Exerts Antiviral Function through Regulation of Stress Granule Formation.

Autor(es): Thulasi Raman, Sathya N; Liu, Guanqun; Pyo, Hyun Mi; Cui, Ya Cheng; Xu, Fang; Ayalew, Lisanework E; Tikoo, Suresh K; Zhou, Yan
Fuente: J Virol;90(7): 3661-75, 2016 Apr.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 26792746
Resumen: UNLABELLED: DDX3 belongs to the DEAD box RNA helicase family and is a multifunctional protein affecting the life cycle of a variety of viruses. However, its role in influenza virus infection is unknown. In this study, we explored the potential role of DDX3 in influenza virus life cycle and discovered that DDX3 is an antiviral protein. Since many host proteins affect virus life cycle by interacting with certain components of the viral machinery, we first verified whether DDX3 has any viral i (mas)

Influenza virus surveillance in Argentina during the 2012 season: antigenic characterization, genetic analysis and antiviral susceptibility.

Autor(es): Benedetti, E; Daniels, R S; Pontoriero, A; Russo, M; Avaro, M; Czech, A; Campos, A; Periolo, N; Gregory, V; McCauley, J W; Baumeister, E G
Fuente: Epidemiol Infect;144(4): 751-67, 2016 Mar.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 26345289
Resumen: The activity and circulation of influenza viruses in Argentina was studied during 2012 as part of the Argentinean Surveillance for Influenza and other Respiratory Viruses, in the context of Global Influenza Surveillance. The antigenicity and molecular characteristics of haemagglutinins (HA) of circulating influenza A and B viruses were analysed to assess the emergence of virus variants. Susceptibility to oseltamivir and zanamivir was evaluated by enzymatic assay and results were backed-up b (mas)
Resultados  1-12 de 636