Name: using reverse genetics to manipulate the nss gene of the rift valley fever virus mp-12 strain to improve vaccine safety and efficacy
Uploaded: 2011-11-01T12:00:00
Description: Watch this Scientific Journal Video about Using Reverse Genetics to Manipulate the NSs Gene of the Rift Valley Fever Virus MP-12 Strain to Improve Vaccine Safety and Efficacy at JoVE.com

Dit werk werd gefinancierd door Grant Nummer 5 U54 AI057156-07 door de Western Regional Center of Excellence (WRCE), een R01 AI08764301-A1 van Nationaal Instituut voor Allergie en Infectieziekten, en een interne financiering van Sealy Center for Vaccine Development aan de Universiteit van Texas Medical Branch.

1. Herstel van de recombinant MP-12 codering NSS mutatie (s) van plasmide DNA&#39;s 2 <ol><li> Spread baby hamster nier (BHK) / T7-9 cellen 15, die stabiel uitdrukken T7-RNA polymerase, in 6-cm gerechten in Minimum Essential Medium (MEM)-alpha (Invitrogen, Cat # 32561037) met 10% foetaal bovine serum (FBS ), penicilline-streptomycine (Penicilline: 100 U / ml, streptomycine: 100 ug / ml) (Invitrogen, Cat # 15140122), en 600 pg / ml hygromycine B (Cellgro, Cat # 30-240-CR). * De efficiëntie...

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Reverse genetics voor RVFV zijn ontwikkeld door verschillende groepen door gebruik te maken van T7-promotor 2,4,5 of muis 3 of 4 mensen pol-I promotor. In dit manuscript beschrijven we een protocol om recombinant RVFV MP-12-stammen te genereren door gebruik te maken BHK/T7-9 cellen 15 die stabiel uitdrukken T7 RNA-polymerase. De efficiëntie van virale herstel gevarieerd afhankelijk van de conditie van BHK/T7-9 cellen, de hoogte van plasmiden, het aantal getransfecteerde celle...

<table border="1"><tr><td> Naam van het reagens </td><td> Vennootschap </td><td> Catalogus nummer </td><td> Commentaar (optioneel) </td></tr><tr><td> Minimum Essential Medium (MEM)-alpha </td><td> Invitrogen </td><td> 32561037 </td><td></td></tr><tr><td> Gewijzigde minimum Dulbecco&#39;s essentieel medium </td><td> Invitrogen </td><td> 11965092 </td><td></td></tr><tr><td> Modified Eagle Medium (MEM 2x) </td><td> Invitrogen </td><td> 11935046 </td><td></td></tr><tr><td> Penicilline-streptomycine </td><td> Invitrogen </td><td> 15140122 </td><td></td></tr><tr><td> Hygromycine B </td><td> Cellgro </td><td> 30 tot 240-CR </td><td></td></tr><tr><td> Tryptose fosfaat bouillon </td><td> MP Biomedicals </td><td> 1682149 </td><td></td></tr><tr><td> Noble agar </td><td> VWR </td><td> 101170-362 </td><td></td></tr><tr><td> Transit-LT1 </td><td> Mirus </td><td> MIR2300</td><td></td></tr><tr><td> Opti-MEM </td><td> Invitrogen </td><td> 31985070 </td><td></td></tr><tr><td> Aerosol strakke deksel </td><td> Eppendorf </td><td> C-2223-25 </td><td></td></tr><tr><td> 0,33% neutraal rood oplossing </td><td> Sigma Aldrich </td><td> N2889-100ML </td><td></td></tr><tr><td> C57/WT MEF cellen </td><td> InvivoGen </td><td> MEF-c57wt </td><td></td></tr><tr><td> Blasticidine S </td><td> InvivoGen </td><td> Ant-bl-1 </td><td></td></tr><tr><td> Zeocin </td><td> InvivoGen </td><td> ANT-zn-1 </td><td></td></tr><tr><td> Kwantitatieve-Blue </td><td> InvivoGen </td><td> vertegen-QB1 </td><td></td></tr><tr><td> BHK/T7-9 cellen 15 </td><td> Gifu universiteit, Japan </td><td></td><td></td></tr><tr><td> Vero-cellen E6 </td><td> ATCC </td><td> CRL-1586 </td><td></td></tr></table>

using reverse genetics to manipulate the nss gene of the rift valley fever virus mp-12 strain to improve vaccine safety and efficacy

Rift Valley-koorts virus (RVFV), dat hemorragische koorts, neurologische aandoeningen of blindheid bij mensen, en een hoog percentage abortussen en foetale misvormingen bij herkauwers 1 veroorzaakt, is geclassificeerd als een HHS / USDA overlap te selecteren agent en een risico groep 3 ziekteverwekker. Het behoort tot het geslacht Phlebovirus in de familie Bunyaviridae en is een van de meest virulente leden van deze familie. Verschillende reverse genetics systemen voor de RVFV MP-12 vaccinstam 2,3 evenals wild-type stammen RVFV 4-6, waaronder ZH548 en ZH501, zijn ontwikkeld sinds 2006. De MP-12 stam (dat is een risico groep 2 ziekteverwekker en een niet-select agent) is sterk verzwakt door verschillende mutaties in de M-en L-segmenten, maar nog steeds draagt ​​virulente S-segment RNA 3, die een functionele virulentie codeert factor, NSS. De RMP12-C13type (C13type) dragen 69% in-frame verwijderen van NSS ORF mist alle bekende NSS-functies, terwijl het repliceert als efficient doet als MP-12 in VeroE6 cellen ontbreekt type I IFN. NSS induceert een shut-off van gastheer transcriptie waaronder interferon (IFN)-bèta mRNA 7,8 en bevordert de afbraak van double-stranded RNA-afhankelijke proteïne kinase (PKR) op de post-translationele niveau. 9,10 IFN-beta is transcriptioneel opgereguleerd door interferon regulerende factor 3 (IRF-3), NF-kB en activator proteïne-1 (AP-1), en de binding van IFN-beta aan IFN-alpha/beta receptor (IFNAR) stimuleert de transcriptie van IFN-alfa genen of andere interferon gestimuleerde genen (ISGs) 11, welke host antivirale activiteiten induceert, terwijl gastheer transcriptie onderdrukking waaronder IFN-beta-gen door NSS voorkomt dat het gen upregulations van die ISGs in reactie op virale replicatie, hoewel IRF-3, NF-kB en activator proteïne-1 (AP-1) kan geactiveerd worden door RVFV7. . Zo NSS is een uitstekend doelwit verder te verzwakken MP-12 en voor het hosten aangeboren immuunrespons te verhogen door het afschaffen van de IFN-beta onderdrukking functie. HierBeschrijven we een protocol voor het genereren van een recombinant MP-12 codering gemuteerde NSS, en geven een voorbeeld van een screening methode om NSS mutanten die niet over de functie om IFN-beta mRNA-synthese onderdrukken identificeren. In aanvulling op haar essentiële rol in de aangeboren immuniteit, type-I IFN is belangrijk voor de rijping van dendritische cellen en de inductie van een adaptieve immuunrespons 12-14. Zo NSS mutanten het induceren van type I IFN worden verder verzwakt, maar tegelijkertijd efficiënter zijn op het stimuleren gastheer immuunreacties dan wild-type MP-12, waardoor ze ideale kandidaten voor vaccinatie benaderingen.

Watch this Scientific Journal Video about Using Reverse Genetics to Manipulate the NSs Gene of the Rift Valley Fever Virus MP-12 Strain to Improve Vaccine Safety and Efficacy at JoVE.com

Using Reverse Genetics to Manipulate the NSs Gene of the Rift Valley Fever Virus MP-12 Strain to Improve Vaccine Safety and Efficacy

De reverse genetics systeem voor de Rift Valley koorts virus MP-12 vaccinstam is een handig hulpmiddel voor het creëren van extra MP-12 mutanten met verhoogde verzwakking en immunogeniciteit. We beschrijven het protocol te genereren en karakteriseren NSS mutante stammen.

Met behulp van reverse genetics aan de NSS-gen van de Rift Valley Fever virus MP-12 Strain om Vaccine veiligheid en effectiviteit te verbeteren manipuleren

Rift Valley fever virus (RVFV), which causes hemorrhagic fever, neurological disorders or blindness in humans, and a high rate abortion and fetal ...

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