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  1. Addgene is Expanding Our Viral Vector Service!

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    Blog Post
    ... maintain high standards for both our depositors and requestors.  Requesting Plasmids available for Packaged...through a distributor?  Yes! Packaged on Request service will be available through our distributor partners...excited to announce that we are expanding our viral vector service to include a Packaged on Request option...AAV composed of an AAV plasmid in the Addgene repository and their choice of five different serotypes....requesting and ordering a Packaged on Request viral vector prep.    Excited? So are we! This expansion...ordering high-quality materials from the Addgene repository. Read on to learn more.  What will be available...available?  Over 3000 AAV plasmids in the Addgene repository will be available for Packaged on Request service...

  2. Viral Vectors 101: Producing Your rAAV

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    Blog Post
    ...and the pRepCap plasmid containing replication factors and serotype-specific capsid genes.  In this helper-free...you’ll need to determine the titer of your viral vector solution. A variety of titering methods have been...preparation.  rAAVs  Now your AAV virions are ready to store or use. They are quite stable and will withstand...about common AAV applications by reading our Viral Vectors 101 series!  This post was originally written by... Unpurified Recombinant Adeno-Associated Viral Vectors [Preprint]. Molecular Biology. https://doi.org/...the Stability and Inactivation of AAV Serotype 1 Vectors. Human Gene Therapy Methods, 28(1), Article 1. ...(2021). Inactivation of Adeno-Associated Viral Vectors by Oxidant-Based Disinfectants. Human Gene Therapy...

  3. Viral Vectors 101 eBook 2nd Edition

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    Blog Post
    ...edition of our Viral Vectors 101 eBook!  This practical guide to using viral vectors in the lab is a helpful...introduction to viral vectors and their elements; resources on different types of vectors, capsids, and tools...information on everything from producing your own vectors in the lab to optimizing AAVs in your experiment...edition Resources on addgene.org  Addgene's Viral Vectors Guide Addgene's Chemogenetics Guide Addgene's Optogenetics...

  4. Rett Syndrome: A History of Research and Therapeutic Outlooks

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    Blog Post
    ...Therapeutics, co-founded by Harvard Investigators and Addgene depositors David Liu, PhD, Keith Joung, PhD...to Rett Syndrome, this blog post describes the history of Rett Syndrome research, the role of the MECP2...exhibit slow head growth, develop seizures, cardio-respiratory dysfunction, distinctive hand movements, and ...& Bird, 2019) and is a global transcriptional regulator of thousands of genes. Studies have suggested ...neurological deficits observed in Rett Syndrome. Restoring the MECP2 gene by excision of the Stop cassette...precise amount of protein to each brain cell to restore physiological levels. Much research is now focused...researchers developed adeno-associated viral (AAV) vectors for the targeted delivery of a functional MECP2...

  5. Depositor Week 2020 is Happening Now. Join us!

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    Blog Post
    ...plasmid tools! Thank you depositors! In fact, this year, Addgene depositors quickly stepped up to make... as an example). Depositor Week will be fun for everyone, whether you are a depositor or not. We will ...Tuesday: Depositor features (plasmid deposits and blog posts showcasing the work of depositors) Wednesday...for some Addgene depositor fun facts for a quick way to grasp the big impacts depositors have on science...your calendars for November 16-20, 2020 for #DepositorWeek on Twitter!  That’s today through Friday. There...scientists who make a big impact in open science. Depositors consistently contribute to our collection so ...COVID-19 related plasmids currently in Addgene’s repository which have been requested about 1,500 times from...

  6. Reagent Repositories Are Speeding up Science During the Pandemic

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    Blog Post
    ...deposited into repositories, and financial support to maintain repositories’ capacity for storing, validating...through a repository, they remain accessible during these times. Centralized reagent repositories, also known...dedicated facilities and manpower that a repository provides. Repositories around the world facilitate the rapid... the scientific community can support repositories. Repositories are essential for the advancement of ...original sources. Figure 1: Biological repositories that distribute mouse strains, plasmids, cell...Culture Collection (ATCC) is a private, nonprofit repository for a variety of materials for life science research... sharing and distribution of cell lines from repositories on opposite sides of the world shows that science...

  7. New and Upcoming Viral Vectors - May 2020

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    Blog Post
    ...ve added many new tools to our inventory of ready-to-use viral vectors. Here are some of the AAV and lentiviral...Serotype Testing AAV inventory for the entire collection! Plasmid Serotype Name Depositor 27056 AAVrg pAAV-Ef1a-DIO...pAAV-EF1a-Flp-DOG-NW Connie Cepko Viral vectors coming soon! These vectors listed below should be released at... of our viral vectors blog posts Find tips for preparing AAVs Download our viral vectors 101 eBook Resources...mDlx enhancer element. Plasmid Serotype Name Depositor 75470 AAV1 pAAV-CAG-FLEXFRT-ChR2(H134R)-mCherry...promotes neuronal firing. Plasmid Serotype Name Depositor 44361 AAV1 pAAV-hSyn-DIO-hM3D(Gq)-mCherry Bryan...also available in AAV1. Plasmid Serotype Name Depositor 69570 AAV1 pAAV-EF1a-N-CretrcintG Connie Cepko...

  8. New and Upcoming Viral Vectors - September 2019

    Type
    Blog Post
    ...ve added many new tools to our inventory of ready-to-use viral vectors. Here are some of the AAV we have...Testing AAV inventory for the entire collection! We are expanding our entire control AAV inventory to give...Calcium Sensors). We are expanding the inventory of these vectors to more serotypes. We currently package...GCaMP7s. See all our biosensors inventory, and check out our latest vectors below: pGP-AAV-syn-jGCaMP7f-...addition to our inventory of Cre-dependent GABA sensors. See all our GABA sensor AAV inventory here. pAAV.hSynap.iGABASnFR...support by growing our inventory of recombinases and recombinase-dependent vectors. We recently released...pENN.AAV.hSyn.Cre.WPRE.hGH (105553-AAV5) Dre vector AAV phSyn1(S)-DreO-bGHpA (50363-AAV5) Flp vectors pAAV-EF1a-mCherry-IRES-Flpo...

  9. The Golden Stopwatch Award: Recognizing Facilitators of Research

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    Blog Post
    ...guarantee certain rights and protections for depositor and requestor alike. That’s why Addgene works closely...closely with TTOs to help protect our depositors’ intellectual property, and to help requesting institutions...California Institute of Technology Cold Spring Harbor Laboratory  Dana-Farber Cancer Institute  Fred Hutchinson...

  10. New and Upcoming Viral Vectors - June 2019

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    Blog Post
    ...ve added many new tools to our inventory of ready-to-use viral vectors. Here are some of the AAV we have...pEF1a-DIO-FLPo-WPRE-hGHp Other new viral vectors New optogenetics inhibitors Plasmid Serotype Name 99039 ...AAV1 pAAV-ihSyn1-DIO-tTA Viral vectors coming soon! These vectors listed below should be released at... of our viral vectors blog posts Find tips for preparing AAVs Download our viral vectors 101 eBook Resources...few months. You can also browse our entire AAV inventory. Our new AAVs include: Control AAVs for serotype...always excited to add new control AAVs to our inventory since we know that scientists need these tools...popular control AAV encoding GFP. Check out our inventory of serotype testing AAV New control AAVs Plasmid...

  11. New and Upcoming Viral Vectors - Spring 2019

    Type
    Blog Post
    ...ve added many new tools to our inventory of ready-to-use viral vectors. Here are some of the AAV we have... used in conjunction with optogenetic activators and inhibitors that respond to blue light. We recently...GABAergic interneurons. These vectors can also be used as the control vectors for experiments encoding a ...pAAV-hSyn-mCherry at Addgene. Viral vectors coming soon! These vectors listed below should be released at... of our viral vectors blog posts Find tips for preparing AAVs Download our viral vectors 101 eBook Resources...far in 2019. You can also browse our entire AAV inventory! Our new AAVs include: pGP-AAV-syn-FLEX-jGCaMP7b-WPRE... Addgene. GABA sensor AAV GABA is the primary inhibitory neurotransmitter in vertebrates, but methods ...

  12. Popular Retroviral Vectors and Their Uses in Scientific Research

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    Blog Post
    ...block Entry vectors and 5 lentiviral Destination vectors. These vectors can induce combinatorial constitutive...research purposes, retroviral vectors have been developed into ‘split-vector systems’ by separating viral...and expression of these vectors when used in experiments. Retroviral vectors make up a large toolbox ...Gamma-retroviral vs. lentiviral vector systems Gamma-retroviral vectors have a relatively high transduction... many more useful viral vectors available at Addgene: Follow our viral vector blog posts for updates on...tips for using retroviral vectors in your experiments. Gamma-retroviral vectors Popular gamma-Retroviral...Transfer Vectors   Expressing your gene of interest pMKO.1 GFP (Plasmid #10676) Retroviral vector for cloning...

  13. PEI Calculator for Planning AAV Packaging Transfections

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    Blog Post
    ... download the PEI calculator for AAV packaging Use the PEI transfection calculator for AAV packaging ...corresponding column in the calculator spreadsheet: We hope that this calculator will make it easier to plan...for AAV packaging, considering using this PEI Calculator. AAV packaging typically requires transfecting...right, you need to do a few calculations. This calculator can do the math for you and it’s simple to make...whole experiment And here’s the equation the calculator uses to give you the μl needed of each plasmid...experiments. Let us know what you think about the calculator in the comments section below. References 1....Production of Recombinant Adeno‐Associated Viral Vectors for In Vitro and In Vivo Use." Current Protocols...

  14. Fluorescent Proteins 101: History of Fluorescent Proteins

    Type
    Blog Post
    ... adapted them for use in the laboratory. The discovery of GFP The story of how fluorescent proteins like...Aequorea victoria (Figure 1) in molecular detail. On the underside of the “umbrella” of A. victoria there...turns out, he was right! He began to study the A. victoria gene responsible for encoding GFP, and, in 1992...sequence. Soon after that, in 1994, Prasher’s collaborator Martin Chalfie expressed GFP in exogenous organisms...studying it grew. In particular, studies in the laboratory of UCSD biochemist Roger Tsien resulted in much...

  15. 5 Science Rap Videos & Their Creator: Tom McFadden

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    Blog Post
    ...Science History Rap Battle A great example of science story telling following the unfortunate story of Rosalind...and their importance in understanding biological history. 4. Please Don't Kill My Hive Beautifully filmed...with us. Tom McFadden is a YouTuber and science educator looking for creative ways to implement the next...

  16. Viral Vectors 101: Inverted Terminal Repeats

    Type
    Blog Post
    ...blog Viral Vectors 101: Viral Vector Elements Viral Vectors 101: Pseudotyping Viral Vectors 101: Systemic...and are required for replication, packaging, and vector persistence. They work in conjunction with the ...retained with the gene in a recombinant AAV (rAAV) vector (Figure 1). Everything else outside the ITRs gets...gets left behind.    Figure 1: Recombinant AAV vector with ITRs that flank the gene cassette, which contains...DNA genome of AAV in the native virus. In an AAV vector plasmid, they flank the gene of interest. A single...of the most important elements of AAV and rAAV vectors, modifications can drastically affect gene transfer...an ITR with a sequence containing transcription factor binding sites can increase transgene expression...

  18. Viral Vectors 101: AAV Variables That Matter

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    Blog Post
    ...serotypes utilize a number of different receptors, co-receptors, and other mechanisms to gain entry into...other factors can also affect your AAV experiments. Luckily, the other posts in our Viral Vectors 101 series...on the Addgene blog Viral Vectors 101: An Introduction to AAV Viral Vectors 101: The AAV Retrograde Serotype...Using AAV vectors in complex biological systems can be tricky at best, and downright infuriating at worst...know what expression pattern you need, and the factors in your system that can affect expression, before...before starting the selection process. Factors to think about are (1) your experimental conditions and measurements...testing, and optimizing three key variables of an AAV vector: serotype, promoter, and titer.     Figure...

  19. Viral Vectors 101: The AAV Retrograde Serotype

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    Blog Post
    ...-dependent vectors, this can cause challenges for the experimental design as these vectors can exhibit...your system. Chemogenetic vectors  Expression of retrograde serotype vectors is present at both the injection...expression, and has retrograde functionality to monitor and map neurons (Tervo et al., 2016). With AAVrg...neuronal tracing reagents, AAV particles require receptor-mediated entry into the cell. This means that ...serotype to conduct experiments with chemogenetic vectors, this property must be taken into account since...projection neurons retrogradely transduced by the vector. One method for minimizing the impact of this phenomenon...phenomenon is to use a retrograde recombinase-expressing vector (e.g. Cre or FLP) to transduce the projection pathway...

  20. Viral Vectors 101: Viruses as Biological Tools

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    Blog Post
    ...Browse Our Viral Vector Pages Learn About Viral Vector Biosafety Deposit Your Viral Vectors ... Viruses are essentially DNA (or RNA) delivery vectors, so what makes them better than the alternatives...measures in a separate, upcoming post. If a viral vector seems like the right approach for your experiment...experiment?           Click Here to Find Viral Vector Resources at Addgene! References and Resources...S, Varmus H. Retroviruses. Cold Spring Harbor Laboratory Press; Cold Spring Harbor, NY, USA: 1997. PubMed... J, et al. “Altering the tropism of lentiviral vectors through pseudotyping.” Curr. Gene. Ther. 5 (2005...

  21. New and Upcoming Viral Vectors - December 2019

    Type
    Blog Post
    ...ve added many new tools to our inventory of ready-to-use viral vectors. Here are some of the AAV we have...pAAV.hSynapsin.SF-iGluSnFR.A184S Viral vectors coming soon! These vectors should be packaged and available ... of our viral vectors blog posts Find tips for preparing AAVs Download our viral vectors 101 eBook Resources...few months. You can also browse our entire AAV inventory. Our new AAVs include: Optogenetics AAV Control...in new serotypes. See our Serotype Testing AAV inventory for the entire collection! Plasmid Serotype...norepinephrine Neuroscience research relies on accurate monitoring of neurotransmitters and we are excited to offer...

  22. Six Spooky Science Stories and Halloween at Addgene

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    Blog Post
    ...science stories. Here are some of our favorite spooky science stories. Six spooky science stories Zombie...Plasmid pumpkins, team costumes, and spooky science stories. Yes, please! At Addgene, we love finding ways ...Vampire bacteria Vampirovibrio chlorellavorus is a predatory bacteria that attaches to the cell wall of green...forcing it out of hiding to become exposed to predators. Hungry birds spots the “caterpillar” and then... "Back from the dead; the curious tale of the predatory cyanobacterium Vampirovibrio chlorellavorus." ...

  23. Four Factors that Differentiate the Stem Cell Field

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    Blog Post
    ...When our Director of Biology, Lianna Swanson, suggested that I might be able to attend the 10 Years of...Oct4, Sox2, Klf4, and cMyc (the so called OSKM factors). As the Yamanaka lab's primary Addgene contact... forward to seeing how the sharing of his OSKM factors have affected the stem cell community – a community...the first clinical trial with iPSCs with his collaborator Takahashi in 2014 – just 8 years after the OSKM...control process alone takes nearly a year. Addgene depositor Juan Carlos Izpsua Belmonte said it took the joint...effort of five post-docs to implant human kidney progenitors into a pig. In stark contrast to recent genome...the scientists I've already mentioned, Addgene depositors Marius Wernig, Kristin Baldwin, Kathrin Plath...

  24. Pairing CombiGEM and CRISPR for Combinatorial Genetic Screening

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    Blog Post
    ...CombiGEM lentiviral vector backbone pAWp12 (Figure 2). Cloning from the pAWp28 storage vector to the pAWp12 ...addition to the combinatorial expression of other genetic elements including transcription factors (Cheng et...indicated below and pool-clone them into the pAWp28 storage vector (Figure 1): Forward oligo: 5’- CACCGNNNNNNNNNNNNNNNNNNNGTTTGGGTCTTCGAGAAGACCTATTCXXXXXXXXC...barcode, respectively. Once cloned into the storage vector, the pooled, barcoded gRNA library is now ready... an easy-to-use tool to analyze the complex combinatorial genetic networks underlying your favorite biological...screening are vastly useful for mapping the combinatorial genetics that underlie complex regulation in...barcoded gRNA libraries that can be used to combinatorially modify the genome, screen for a particular ...

  25. History of CRISPR Cas - A tale of survival and evolution

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    Blog Post
    ...Initial experiments exposed S. thermophilus to predatory phages to test if the exogenous DNA would be incorporated...system that utilized various cas genes not only to store a record of invading phages but to also destroy ...race" between phages and prokaryotes; the ultimate victor will be the species who has the strongest will ...

  26. Viral Vectors 101: AAV Serotypes and Tissue Tropism

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    Blog Post
    ... growth factor receptor 1 (FGFR1)3 αVβ5 and α5β1 integrins3 Hepatocyte growth factor receptor (HGFR)3 ...Platelet-derived growth factor receptor (PDGFR) α and β3 AAV8 Laminin receptor (LR)3 AAV receptor2   AAV9 ... Table 1: AAV capsids and receptors. Capsid Primary receptor Coreceptor AAV1 α2,3-/α2,6 N-linked...Viral Vectors 101: An Introduction to AAV Viral Vectors 101: AAV Variables that Matter Viral Vectors 101...serotypes have a primary cellular receptor and sometimes one or multiple coreceptors, which may be present on ...sialic acids1 AAV receptor2   AAV2 Heparan sulfate proteoglycan (HSPG)3 AAV receptor (not strictly ...3 Laminin receptor (LR)3 CD93 AAV5 2,3-N-linked sialic acid4 AAV receptor2 Platelet-derived ...

  27. Viral Vectors 101: Gamma-Retroviral Packaging Systems

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    Blog Post
    ...Addgene blog Viral Vector Elements The Retroviral Life Cycle Popular Retroviral Vectors and Their Use in...  Frequently asked questions about γ-retroviral vectors How do engineered γ-retroviruses differ from lentiviruses...Woodchuck hepatitis virus post‐transcriptional regulatory element; sequence that stimulates the expression...was originally published in 2018, in the Viral Vectors 101 eBook, 1st edition.  References and resources...

  28. Twenty Years of Sharing: Addgene's Viral Vector Service

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    Blog Post
    ...been finding and sharing stories unique to our repository and resources. As editor of Addgene’s eBooks — ...amount of vectors available and number of requests tell only part of the story. Viral vectors are, after...GCaMP-encoding viral vectors available in the repository. GCaMP, a calcium indicator (biosensor, by Addgene...information from requestors and depositors, and identifying trends in our own repository data, giving us...released Viral Vectors 101 2nd edition — I was incredibly excited when we picked our viral vector service as... as one of those stories. Viral vectors are viruses engineered to be safely used to deliver a genetic ...titer. Addgene’s Viral Vector Service Besides being complex to use, viral vectors are also difficult both...

  29. Q&A With Julie Cicalese, the Newest Member of the Addgene Board of Directors

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    Blog Post
    ...welcome Julie Cicalese to the Addgene Board of Directors. Cicalese served as the Chief Human Resource Officer...School. The addition of Cicalese to the Board of Directors brings human resources experience and insight ...included the Belmont Human Rights Commission and mediator for the Massachusetts small claims court summary... Meet the other members of Addgene's Board of Directors Find careers at Addgene ...

  30. Viral Vectors 101: Parts of the AAV Packaging Plasmid

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    Blog Post
    ...proteins from the AAV2 serotype are used to package vector genomes flanked by AAV2 ITRs into a capsid other...Strohl WR (2017) Adeno-Associated Virus (AAV) as a Vector for Gene Therapy. BioDrugs 31:317–334 . https:/...for Targeting and Improving the Efficacy of AAV Vectors. Molecular Therapy - Methods & Clinical Development...Adeno-Associated Virus Genome Interactions Important for Vector Production and Transduction. Human Gene Therapy...
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