superinfection/protease

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A 5'-proximal region of the Citrus tristeza virus genome encoding two leader proteases is involved in virus superinfection exclusion.

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Superinfection exclusion (SIE), a phenomenon in which a primary virus infection prevents a secondary infection with the same or closely related virus, has been observed with various viruses. Earlier we demonstrated that SIE by Citrus tristeza virus (CTV) requires viral p33 protein. In this work we

The Coat Protein and NIa Protease of Two Potyviridae Family Members Independently Confer Superinfection Exclusion.

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Superinfection exclusion (SIE) is an antagonistic virus-virus interaction whereby initial infection by one virus prevents subsequent infection by closely related viruses. Although SIE has been described in diverse viruses infecting plants, humans, and animals, its mechanisms, including involvement

Superinfection exclusion in cells infected with hepatitis C virus.

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Superinfection exclusion is the ability of an established virus infection to interfere with infection by a second virus. In this study, we found that Huh-7.5 cells acutely infected with hepatitis C virus (HCV) genotype 2a (chimeric strain J6/JFH) and cells harboring HCV genotype 1a, 1b, or 2a

Lack of detectable human immunodeficiency virus type 1 superinfection during 1072 person-years of observation.

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We examined consecutive protease (PR) and reverse transcriptase (RT) sequences from human immunodeficiency virus (HIV) type 1-infected individuals, to distinguish changes resulting from sequence evolution due to possible superinfection. Between July 1997 and December 2001, >/=2 PR and RT samples

Rubella virus-induced superinfection exclusion studied in cells with persisting replicons.

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For the first time, homologous superinfection exclusion was documented for rubella virus (RUB) by using Vero cells harbouring persisting RUB replicons. Infection with wild-type RUB was reduced by tenfold, whereas Sindbis virus infection was unaffected. Replication following infection with packaged

[Changes in the protease activity in the lungs of mice infected with the influenza A virus].

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In uninfected animals, the level of protease and protease-inhibiting activities in the serum are in balance which is broken after influenza A virus infection. Most profound changes occur within the first few hours after infection. In 6 hours postinfection the amount of protease decreases both in the

Superinfection of defective human immunodeficiency virus type 1 with different subtypes of wild-type virus efficiently produces infectious variants with the initial viral phenotypes by complementation followed by recombination.

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Superinfection rates of human immunodeficiency virus type 1 (HIV-1) have increasingly been leading to more variation in HIV-1, as evidenced by the emergence of circulating recombinant forms (CRFs). We recently reported complementation in a persistently replication-defective subtype B-infected cell

Virological evaluation of the 'Ottawa case' indicates no evidence for HIV-1 superinfection.

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An HIV-1 infected man who experienced rapid disease progression and poor response to therapy after starting a new sexual relationship with an infected partner is known as the 'Ottawa superinfection case'. Subsequent analysis of viral sequences of protease, reverse transcriptase, Gag p17, and Env V3

Loss of interferon regulatory factor 3 in cells infected with classical swine fever virus involves the N-terminal protease, Npro.

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We show that cells infected with the pestivirus classical swine fever virus (CSFV) fail to produce alpha/beta interferon not only following treatment with double-stranded RNA but also after superinfection with a heterologous virus, the alphavirus Sindbis virus, a virus shown to normally induce

Persistence of multidrug-resistant HIV-1 in primary infection leading to superinfection.

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OBJECTIVE The authors previous studies documented persistence of multidrug resistance (MDR) acquired in five primary HIV-1 infection (PHI) cases for 1-2 years in the absence of antiretroviral treatment. This study characterizes the evolution of transmitted wild-type (WT) (n = 15), resistant (n =

Inhibition of Epstein-Barr virus replication by small interfering RNA targeting the Epstein-Barr virus protease gene.

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BACKGROUND The Epstein-Barr virus (EBV) protease (PR), coded by the BVRF2 gene, is essential for the maturation of the viral capsid and viral DNA packaging during the late stage of the EBV lytic cycle. Like the other herpesvirus serine PRs, EBV PR could be a target for the inhibition of EBV

Superinfection of human immunodeficiency virus type 1 (HIV-1) to cell clone persistently infected with defective virus induces production of highly cytopathogenic HIV-1.

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Superinfection with human immunodeficiency virus type 1 (HIV-1) in human subjects, defined as reinfection with a heterologous strain of HIV-1, has become a topic of great interest. To illustrate the significance of this occurrence, we performed HIV-1 superinfection of L-2 cells, which were isolated

Relationships between host blood factors and proteases in Glossina morsitans subspecies infected with Trypanosoma congolense.

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Host blood effects on Trypanosoma congolense establishment in Glossina morsitans morsitans and Glossina morsitans centralis were investigated using goat, rabbit, cow and rhinoceros blood. Meals containing goat erythrocytes facilitated infection in G.m.morsitans, whereas meals containing goat plasma

Superinfection with drug-resistant HIV is rare and does not contribute substantially to therapy failure in a large European cohort.

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BACKGROUND Superinfection with drug resistant HIV strains could potentially contribute to compromised therapy in patients initially infected with drug-sensitive virus and receiving antiretroviral therapy. To investigate the importance of this potential route to drug resistance, we developed a

Hypothesis of interference to superinfection between bovine spastic paresis and bovine spongiform encephalopathy; suggestions for experimentation, theoretical and practical interest.

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Sub-acute transmissible spongiform encephalopathies (TSEs) or prion diseases are diseases of little known etiology. The origin of these diseases would appear to be an abnormal protease-resistant prion protein (PrP(res)) which would be infectious by directly inducing its defective conformation to the

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