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Resultados  1-12 de 66
1.

Dose-dependent antiviral activity of released-active form of antibodies to interferon-gamma against influenza A/California/07/09(H1N1) in murine model.

Autor(es): Don, Еlena S; Emelyanova, Alexandra G; Yakovleva, Natalia N; Petrova, Nataliia V; Nikiforova, Marina V; Gorbunov, Evgeniy A; Tarasov, Sergey А; Morozov, Sergey G; Epstein, Оleg I
Fonte: J Med Virol;89(5): 759-766, 2017 May.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27769099
Resumo: The assessment of dose-response is an essential part of drug development in terms of the determination of a drug's effective dose, finding the safety endpoint, estimation of the pharmacokinetic profile, and even validation of drug activity, especially for therapeutic agents with a principally novel mechanism of action. Drugs based on released-active forms of antibodies are a good example of such a target. In this study, the efficacy of the antiviral drug Anaferon for children (released-acti (mais)
2.

Antiviral susceptibility profile of influenza A viruses; keep an eye on immunocompromised patients under prolonged treatment.

Autor(es): Kossyvakis, A; Mentis, A-F A; Tryfinopoulou, K; Pogka, V; Kalliaropoulos, A; Antalis, E; Lytras, T; Meijer, A; Tsiodras, S; Karakitsos, P; Mentis, A F
Fonte: Eur J Clin Microbiol Infect Dis;36(2): 361-371, 2017 Feb.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27848039
Resumo: There was an increase in severe and fatal influenza cases in Greece during the 2011-2015 post-pandemic period. To investigate causality, we determined neuraminidase (NA) inhibitor susceptibility and resistance-conferring NA and hemagglutinin (HA) mutations in circulating influenza type A viruses during the pandemic (2009-2010) and post-pandemic periods in Greece. One hundred thirty-four influenza A(H1N1)pdm09 and 95 influenza A(H3N2) viruses submitted to the National Influenza Reference Lab (mais)
3.

Monitoring the fitness of antiviral-resistant influenza strains during an epidemic: a mathematical modelling study.

Autor(es): Leung, Kathy; Lipsitch, Marc; Yuen, Kwok Yung; Wu, Joseph T
Fonte: Lancet Infect Dis;17(3): 339-347, 2017 Mar.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27914853
Resumo: BACKGROUND: Antivirals (eg, oseltamivir) are important for mitigating influenza epidemics. In 2007, an oseltamivir-resistant influenza seasonal A H1N1 strain emerged and spread to global fixation within 1 year. This event showed that antiviral-resistant (AVR) strains can be intrinsically more transmissible than their contemporaneous antiviral-sensitive (AVS) counterpart. Surveillance of AVR fitness is therefore essential. Our objective was to develop a simple method for estimating AVR fitne (mais)
4.

High antiviral effect of TiO ·PL-DNA nanocomposites targeted to conservative regions of (-)RNA and (+)RNA of influenza A virus in cell culture.

Autor(es): Levina, Asya S; Repkova, Marina N; Bessudnova, Elena V; Filippova, Ekaterina I; Mazurkova, Natalia A; Zarytova, Valentina F
Fonte: Beilstein J Nanotechnol;7: 1166-1173, 2016.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27826491
Resumo: The development of new antiviral drugs based on nucleic acids is under scrutiny. An important problem in this aspect is to find the most vulnerable conservative regions in the viral genome as targets for the action of these agents. Another challenge is the development of an efficient system for their delivery into cells. To solve this problem, we proposed a TiO ·PL-DNA nanocomposite consisting of titanium dioxide nanoparticles and polylysine (PL)-containing oligonucleotides. The TiO ·PL- (mais)
5.

Effect of antiviral prophylaxis on influenza outbreaks in aged care facilities in three local health districts in New South Wales, Australia, 2014.

Autor(es): Merritt, Tony; Hope, Kirsty; Butler, Michelle; Durrheim, David; Gupta, Leena; Najjar, Zeina; Conaty, Stephen; Boonwatt, Leng; Fletcher, Stephanie
Fonte: Western Pac Surveill Response J;7(1): 14-20, 2016 Jan-Mar.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27757249
Resumo: BACKGROUND: There was a record number ( = 111) of influenza outbreaks in aged care facilities in New South Wales, Australia during 2014. To determine the impact of antiviral prophylaxis recommendations in practice, influenza outbreak data were compared for facilities in which antiviral prophylaxis and treatment were recommended and for those in which antivirals were recommended for treatment only. METHODS: Routinely collected outbreak data were extracted from the Notifiable Conditions Inf (mais)
6.

MDA7/IL-24 is an anti-viral factor that inhibits influenza virus replication.

Autor(es): Seong, Rak-Kyun; Choi, Young-Ki; Shin, Ok Sarah
Fonte: J Microbiol;54(10): 695-700, 2016 Oct.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27687232
Resumo: Melanoma differentiation associated gene-7 (mda-7)/interleukin- 24 (IL-24) is a secreted cytokine, which plays an essential role in tumor suppression. Although its role as a multifunctional protein affecting broad types of cancers is well described, functions of IL-24 in host defense against virus infection are yet to be determined. In this study, we explored the anti-viral effect of recombinant IL-24 treatment during influenza infection. Infection of human lung adenocarcinoma cells (A549) (mais)
7.

Mycoplasma hyopneumoniae does not affect the interferon-related anti-viral response but predisposes the pig to a higher level of inflammation following swine influenza virus infection.

Autor(es): Deblanc, Céline; Delgado-Ortega, Mario; Gorin, Stéphane; Berri, Mustapha; Paboeuf, Frédéric; Berthon, Patricia; Herrler, Georg; Meurens, François; Simon, Gaëlle
Fonte: J Gen Virol;97(10): 2501-2515, 2016 Oct.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27498789
Resumo: In pigs, influenza A viruses and Mycoplasma hyopneumoniae (Mhp) are major contributors to the porcine respiratory disease complex. Pre-infection with Mhp was previously shown experimentally to exacerbate the clinical outcomes of H1N1 infection during the first week after virus inoculation. In order to better understand the interactions between these pathogens, we aimed to assess very early responses (at 5, 24 and 48 h) after H1N1 infection in pigs pre-infected or not with Mhp. Clinical sign (mais)
8.

A Defective Interfering Influenza RNA Inhibits Infectious Influenza Virus Replication in Human Respiratory Tract Cells: A Potential New Human Antiviral.

Autor(es): Smith, Claire M; Scott, Paul D; O'Callaghan, Christopher; Easton, Andrew J; Dimmock, Nigel J
Fonte: Viruses;8(8)2016 Aug 22.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27556481
Resumo: Defective interfering (DI) viruses arise during the replication of influenza A virus and contain a non-infective version of the genome that is able to interfere with the production of infectious virus. In this study we hypothesise that a cloned DI influenza A virus RNA may prevent infection of human respiratory epithelial cells with infection by influenza A. The DI RNA (244/PR8) was derived by a natural deletion process from segment 1 of influenza A/PR/8/34 (H1N1); it comprises 395 nucleoti (mais)
9.

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
Fonte: Chem Biol Drug Des;88(3): 411-21, 2016 09.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27062664
Resumo: 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 (mais)
10.

Mycophenolic acid, an immunomodulator, has potent and broad-spectrum in vitro antiviral activity against pandemic, seasonal and avian influenza viruses affecting humans.

Autor(es): To, Kelvin K W; Mok, Ka-Yi; Chan, Andy S F; Cheung, Nam N; Wang, Pui; Lui, Yin-Ming; Chan, Jasper F W; Chen, Honglin; Chan, Kwok-Hung; Kao, Richard Y T; Yuen, Kwok-Yung
Fonte: J Gen Virol;97(8): 1807-17, 2016 Aug.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27259985
Resumo: Immunomodulators have been shown to improve the outcome of severe pneumonia. We have previously shown that mycophenolic acid (MPA), an immunomodulator, has antiviral activity against influenza A/WSN/1933(H1N1) using a high-throughput chemical screening assay. This study further investigated the antiviral activity and mechanism of action of MPA against contemporary clinical isolates of influenza A and B viruses. The 50 % cellular cytotoxicity (CC50) of MPA in Madin Darby canine kidney cell l (mais)
11.

Gene Expression and Antiviral Activity of Interleukin-35 in Response to Influenza A Virus Infection.

Autor(es): Wang, Li; Zhu, Shengli; Xu, Gang; Feng, Jian; Han, Tao; Zhao, Fanpeng; She, Ying-Long; Liu, Shi; Ye, Linbai; Zhu, Ying
Fonte: J Biol Chem;291(32): 16863-76, 2016 Aug 05.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27307042
Resumo: Interleukin-35 (IL-35) is a newly described member of the IL-12 family. It has been reported to inhibit inflammation and autoimmune inflammatory disease and can increase apoptotic sensitivity. Little is known about the role of IL-35 during viral infection. Herein, high levels of IL-35 were found in peripheral blood mononuclear cells and throat swabs from patients with seasonal influenza A virus (IAV) relative to healthy individuals. IAV infection of human lung epithelial and primary cells i (mais)
12.

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
Fonte: Antiviral Res;132: 170-7, 2016 Aug.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27321665
Resumo: 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 (mais)
Resultados  1-12 de 66