Skip to main content

Home/ WSU Virology/ Group items tagged baculoviruses

Rss Feed Group items tagged

Sarah Muncy

ScienceDirect.com - Journal of Bioscience and Bioengineering - Efficient production of ... - 0 views

  •  
    This article about baculoviruses goes into how not only can baculoviruses make simple proteins, or express angitens of forgein substances, they can also make pieces of antibodies!
Sarah Muncy

ScienceDirect.com - Vaccine - Hemagglutinin Displayed Baculovirus Protects Against High... - 0 views

    • Sarah Muncy
       
      So, the baculovirus on TOP of having the H5HA on it, can also get the immune system to kick in better?
  • It is remarkable that low doses (103pfu/mouse) of BVs act as an effective adjuvant [41]. Therefore, reducing BV concentration and elongating vaccination intervals may prevent memory responses to BV administration
  • scanning densitometry
  • ...8 more annotations...
  • Foreign immunogens or peptides can be displayed on the envelope of AcMNPV by fusion with the baculovirus major envelope protein gp64
  • Baculoviruses have strong adjuvant activity to promote humoral and cellular immune responses against coadministered antigens, activate dendritic cells maturation, induce the production of cytokines, chemokines, and type I IFNs
  • There are two influenza vaccine approaches licensed in the US; the inactivated, split vaccine and the live-attenuated virus vaccine. Inactivated vaccines can efficiently induce humoral immune responses but generally only poor cellular immune responses.
  • Therefore, influenza HA can be displayed on the surface of baculovirus
  • virus-like particle (VLP)
  • Even though cellular immune responses cannot confer sterilizing immunity, they are able to reduce the severity of infection and lower morbidity and mortality rates [47], and antigen-specific memory T cells are able to rapidly respond to a secondary virus infection [45]. Furthermore, cellular immune responses to the conserved epitopes contained in vaccines may provide cross-protective immunity against different subtypes of influenza virus infection
  • To confirm that each HA was incorporated on the envelope of baculoviruses, supernatants from infected Sf9 cells were used to perform hemagglutination assay
  • Most BV display strategies rely on gp64 protein which is the major envelope protein of baculovirus.
  •  
    This paper gave me a better understanding of some aspects of my focal paper that were unclear. How to test for HA, and how baculoviruses may be adjuvants in addition to expression vectors.
Sarah Muncy

ScienceDirect.com - Vaccine - Intranasal and intramuscular immunization with Baculoviru... - 0 views

  • An anti-malarial transmission-blocking vaccine (TBV) that prevents fertilization and/or ookinete/oocyst development within the mosquito is an attractive strategy to limit the transmission of malaria
  • The present study used this system to generate a Plasmodium vivax transmission-blocking immunogen (AcNPV-Dual-Pvs25).
  • Plasmodium vivax
  • ...10 more annotations...
  • A variety of expression vectors (e.g., Escherichia coli, Pichia pastoris and DNA) have been used to express Pvs25 protein which has been administered alone or in combination with adjuvants
  • To date these studies suggest that the recombinant protein currently requires both not only linear, but conformation dependent epitopes, and a strong adjuvant to induce transmission-blocking antibodies.
  • Intranasal and intramuscular immunization with Baculovirus Dual Expression System-based Pvs25 vaccine substantially blocks Plasmodium vivax transmission
  • Recently, we have developed a new vaccine vector system based on the baculovirus Autographa californica nucleopolyhedrosis virus (AcNPV) termed the “Baculovirus Dual Expression System”, which drives expression of vaccine candidate antigens by a dual promoter that consists of tandemly arranged baculovirus-derived polyhedrin and mammalian-derived CMV promoters. It has been shown that AcNPV, an enveloped double-stranded DNA virus that naturally infects insects, possesses strong adjuvant properties that can activate dendritic cell-mediated innate immunity
  • Mucosal vaccines have several attractive features compared with parenteral vaccines (e.g., safety, cost-effectiveness and ease of administration), but studies on their use have been limited almost exclusively to protection against mucosally transmitted pathogens. We provide evidence that i.n. immunization is a feasible alternative for preventing malaria, which is transmitted through non-mucosal routes
  • These results are consistent with our previous work showing that intranasal immunization with the baculovirus-based vaccine induced strong systemic humoral immune responses with high titres of antigen-specific antibodies and conferred complete protection against malaria blood-stage challenge
  • which can induce immunological memory against heterologous antigens in a rodent model; however, it is precluded from clinical use due to its enterotoxicity and potential hazardous effects on olfactory nerves [22]. In contrast, a baculovirus-based delivery system may offer an attractive immunization method, as AcNPV exhibits low cytotoxicity and is incapable of replication in mammalian cells
  • The data described here adds to previously presented data showing the significant potential of the baculovirus dual expression system against the blood stages of the parasite
  • but also demonstrates clearly its ability to induce antibodies against the ookinete surface protein Pvs25, and to elicit a transmission-blocking immune response against the P. vivax isolates from endemic areas, and a transgenic rodent malaria parasite model in preliminary studies.
  • One was SMFA on peripheral blood from P. vivax infected patients.
  •  
    Reference paper #2. Gave me information on malaria and baculoviruses.
Casey Finnerty

Baculoviruses - 0 views

  •  
    This site has the best diagram and flash video I've found to show the baculovirus replication cycle.
Sarah Muncy

High levels of genetic variation within Helicover... [Arch Virol. 2012] - PubMed - NCBI - 0 views

  •  
    Is it that the virus itself has a great deal of genetic diverisity, or is it somehow an emergent property with it and the host organism? Insects are arguably the most diverse organisms on earth, doesn't it seem reasonable to expect baculoviruses to be equally diverse? Even if they're simply diverse because they've evolved (or whatever terms apply to these abiotic "Creatures") together, each one-upping each other as natural selection has operated- it's pretty cool.
Casey Finnerty

Functional importance of deletion mut... [Appl Environ Microbiol. 2005] - PubMed - NCBI - 0 views

  •  
    This paper shows the importance of genotypic diversity for baculovirus populations, particularly in terms of pathogenicity.
Casey Finnerty

Actin-based motility drives baculovirus transit to the nucleus and cell surface - 3 views

  •  
    How cool? So, so, so, so cool! You MUST check out the videos.
  •  
    How cool? So, so, so, so cool! You MUST check out the videos.
1 - 10 of 10
Showing 20 items per page