ORCID Profile
0000-0002-2448-8501
Current Organisation
CSIRO
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Publisher: American Society for Microbiology
Date: 31-05-2023
DOI: 10.1128/JVI.00451-23
Publisher: Elsevier BV
Date: 11-2020
Publisher: Springer Science and Business Media LLC
Date: 12-11-2018
Publisher: Elsevier BV
Date: 03-2020
Publisher: Public Library of Science (PLoS)
Date: 02-03-2020
Publisher: Public Library of Science (PLoS)
Date: 28-03-2019
Publisher: Informa UK Limited
Date: 02-06-2020
Publisher: Elsevier BV
Date: 09-2018
DOI: 10.1016/J.VACCINE.2018.08.012
Abstract: Recombination is closely linked with virus replication and is an important mechanism that contributes to genome ersification and evolution in alphaherpesviruses. Infectious laryngotracheitis (ILTV Gallid alphaherpesvirus 1) is an alphaherpesvirus that causes respiratory disease in poultry. In the past, natural (field) recombination events between different strains of ILTV generated virulent recombinant viruses that have caused severe disease and economic loss in poultry industries. In this study, chickens were vaccinated with attenuated ILTV vaccines to examine the effect of vaccination on viral recombination and ersity following subsequent co-inoculation with two field strains of ILTV. Two of the vaccines (SA2 and A20) prevented ILTV replication in the trachea after challenge, but the level of viral replication after co-infection in birds that received the Serva ILTV vaccine strain did not differ from that of the mock-vaccinated (control) birds. Even though the levels of viral replication were similar in the two groups, the number of recombinant progeny viruses and the level of viral ersity were significantly lower in the Serva-vaccinated birds than in mock-vaccinated birds. In both the mock-vaccinated and Serva-vaccinated groups, a high proportion of recombinant viruses were detected in naïve in-contact chickens that were housed with the co-inoculated birds. Our results indicate that vaccination can limit the number and ersity of recombinant progeny viruses in a manner that is independent of the level of virus replication. It is possible that immune responses induced by vaccination can select for virus genotypes that replicate well under the pressure of the host immune response.
Publisher: Microbiology Society
Date: 16-08-2023
DOI: 10.1099/JGV.0.001874
Abstract: The genus Lagovirus of the family Caliciviridae contains some of the most virulent vertebrate viruses known. Lagoviruses infect leporids, such as rabbits, hares and cottontails. Highly pathogenic viruses such as Rabbit haemorrhagic disease virus 1 (RHDV1) cause a fulminant hepatitis that typically leads to disseminated intravascular coagulation within 24–72 h of infection, killing over 95 % of susceptible animals. Research into the pathophysiological mechanisms that are responsible for this extreme phenotype has been h ered by the lack of a reliable culture system. Here, we report on a new ex vivo model for the cultivation of lagoviruses in cells derived from the European rabbit ( Oryctolagus cuniculus ) and European brown hare ( Lepus europaeus ). We show that three different lagoviruses, RHDV1, RHDV2 and RHDVa-K5, replicate in monolayer cultures derived from rabbit hepatobiliary organoids, but not in monolayer cultures derived from cat ( Felis catus ) or mouse ( Mus musculus ) organoids. Virus multiplication was demonstrated by (i) an increase in viral RNA levels, (ii) the accumulation of dsRNA viral replication intermediates and (iii) the expression of viral structural and non-structural proteins. The establishment of an organoid culture system for lagoviruses will facilitate studies with considerable implications for the conservation of endangered leporid species in Europe and North America, and the biocontrol of overabundant rabbit populations in Australia and New Zealand.
Publisher: Medknow
Date: 2014
Abstract: Anticancer properties of artemisinin and its derivatives have been shown in many experiments. Addition of butyric acid, miconazole, and iron to this traditional drug has been done in order to enhance its anticancer potency. Cell lines 5637 and 4T1, were cultivated and classified into 13 groups of three each. Different doses of artemisinin with constant doses of iron, miconazole and butyric acid, were added to the cultures. At the end of exposure pathological and enzymatic studies were performed. In four groups treated with different doses of artemisinin and iron, dose-dependent changes were observed. These changes included apoptosis and necrosis with dominance of apoptosis. The supernatant lactate dehydrogenase (LDH) level was increased in a dose-dependent manner, but there was no significant increase in the cell fraction of malonyldialdehyde (MDA) or LDH. In four other groups, which received miconazole, butyric acid and iron in addition to different doses of artemisinin, necrosis was more prominent than apoptosis, and the MDA level did not show any significant change, but LDH was increased. The groups treated with miconazole showed identical changes, with less severity compared to combination therapy groups. In butyric acid-treated groups, the only detectable changes were, mild cell swelling, few apoptosis, and rare necrosis. A combination therapy with artemisinin can be more effective against cancer cells than monotherapy with that. Butyric acid was not effective on cancer cells. Miconazole deviated the nature of cell death from apoptosis to necrosis and it must be used under caution.
Location: Australia
No related grants have been discovered for Omid Fakhri.