Review



lentiviral vector backbone  (Addgene inc)


Bioz Verified Symbol Addgene inc is a verified supplier  
  • Logo
  • About
  • News
  • Press Release
  • Team
  • Advisors
  • Partners
  • Contact
  • Bioz Stars
  • Bioz vStars
  • 93

    Structured Review

    Addgene inc lentiviral vector backbone
    Lentiviral Vector Backbone, supplied by Addgene inc, used in various techniques. Bioz Stars score: 93/100, based on 41 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/pHR_PGK_antiCD19_synNotch_Gal4VP64+(Plasmid+%2379125)/pm41856998-208-4-8
    Average 93 stars, based on 41 article reviews
    lentiviral vector backbone - by Bioz Stars, 2026-09
    93/100 stars

    Images

    Related Articles

    Sequencing:

    Article Title: An ATP-gated molecular switch orchestrates human mRNA export
    Article Snippet: .. The full reporter sequence, consisting of the mCherry coding sequence (CDS) with a single intron containing ten boxB sites, an IRES and the GFP-puromycin resistance ORF (mCherry 1/2 -5′SS-10×boxB-IRES-GFP-Puro R -3′SS-mCherry 2/2 ), was synthesized (Genewiz) and cloned into a lentiviral vector backbone (pRRL SFFV d20GFP.T2A.mTagBFP Donor was a gift from A, Scharenberg; Addgene plasmid, 31485), yielding the plasmid containing pRRL-SFFV-reporter plasmid. .. Viral particles were generated by polyethylenimine transfection (Polysciences) of the pRRL-SFFV-reporter plasmid, together with the helper plasmids pCMVR8.74 (a gift from D. Trono (Addgene plasmid, 22036) and pCMV-VSV-G (a gift from B. Weinberg; Addgene plasmid, 8454) into LentiX-cells (Takara) according to standard procedures.

    Synthesized:

    Article Title: An ATP-gated molecular switch orchestrates human mRNA export
    Article Snippet: .. The full reporter sequence, consisting of the mCherry coding sequence (CDS) with a single intron containing ten boxB sites, an IRES and the GFP-puromycin resistance ORF (mCherry 1/2 -5′SS-10×boxB-IRES-GFP-Puro R -3′SS-mCherry 2/2 ), was synthesized (Genewiz) and cloned into a lentiviral vector backbone (pRRL SFFV d20GFP.T2A.mTagBFP Donor was a gift from A, Scharenberg; Addgene plasmid, 31485), yielding the plasmid containing pRRL-SFFV-reporter plasmid. .. Viral particles were generated by polyethylenimine transfection (Polysciences) of the pRRL-SFFV-reporter plasmid, together with the helper plasmids pCMVR8.74 (a gift from D. Trono (Addgene plasmid, 22036) and pCMV-VSV-G (a gift from B. Weinberg; Addgene plasmid, 8454) into LentiX-cells (Takara) according to standard procedures.

    Clone Assay:

    Article Title: An ATP-gated molecular switch orchestrates human mRNA export
    Article Snippet: .. The full reporter sequence, consisting of the mCherry coding sequence (CDS) with a single intron containing ten boxB sites, an IRES and the GFP-puromycin resistance ORF (mCherry 1/2 -5′SS-10×boxB-IRES-GFP-Puro R -3′SS-mCherry 2/2 ), was synthesized (Genewiz) and cloned into a lentiviral vector backbone (pRRL SFFV d20GFP.T2A.mTagBFP Donor was a gift from A, Scharenberg; Addgene plasmid, 31485), yielding the plasmid containing pRRL-SFFV-reporter plasmid. .. Viral particles were generated by polyethylenimine transfection (Polysciences) of the pRRL-SFFV-reporter plasmid, together with the helper plasmids pCMVR8.74 (a gift from D. Trono (Addgene plasmid, 22036) and pCMV-VSV-G (a gift from B. Weinberg; Addgene plasmid, 8454) into LentiX-cells (Takara) according to standard procedures.

    Article Title: Structure of the human core transcription-export complex reveals a hub for multivalent interactions
    Article Snippet: .. For endogenous purification of THO–UAP56 from human K562 cells, the THOC1 cDNA and a C-terminal 3CAID-GFP tag were cloned into a lentiviral vector backbone (Addgene plasmid #31485), yielding a plasmid containing pRRL-SFFV-THOC1-3C-AID-GFP. ..

    Article Title: Structure of the human core transcription-export complex reveals a hub for multivalent interactions
    Article Snippet: .. For endogenous purification of THO–UAP56 from human K562 cells, the THOC1 cDNA and a C-terminal 3C-AID-GFP tag were cloned into a lentiviral vector backbone (Addgene plasmid #31485), yielding a plasmid containing pRRL-SFFV-THOC1-3C-AID-GFP. ..

    Article Title: mRNA recognition and packaging by the human transcription-export complex.
    Article Snippet: .. Wild-type ALYREF or mutant ALYREF(M-c+∆d) cDNA and a N-terminal 3×Flag tag were cloned into a lentiviral vector backbone (Addgene, plasmid 1485), producing a plasmid containing pRRL-SFFV 3×-Flag-Aly/ REF-p2a-mCherry. .. For an overexpression of ALYREF variants in K562 THOC1–GFP-overexpressing cells, lentiviral particles carrying the 3×-Flag-ALYREF constructs were generated using Lenti-X cells (Takara) by polyethylenimine transfection (Polysciences) of the viral plasmid and helper plasmids pCMVR8.74 (Addgene plasmid, 22036) and pCMV-VSV-G (Addgene, plasmid 8454) according to standard procedures.

    Article Title: Memory cytotoxic SARS-CoV-2 spike protein-specific CD4+ T cells associate with viral control
    Article Snippet: .. In brief, the cDNA for the human ACE2 gene (ENSG00000130234) was cloned into a lentiviral vector backbone (Addgene plasmid ID 17488), then cotransfected with packaging plasmids pMD2.G and psPAX2 into HEK293-TLA using PEIpro (Polyplus) to produce lentivirus. ..

    Plasmid Preparation:

    Article Title: An ATP-gated molecular switch orchestrates human mRNA export
    Article Snippet: .. The full reporter sequence, consisting of the mCherry coding sequence (CDS) with a single intron containing ten boxB sites, an IRES and the GFP-puromycin resistance ORF (mCherry 1/2 -5′SS-10×boxB-IRES-GFP-Puro R -3′SS-mCherry 2/2 ), was synthesized (Genewiz) and cloned into a lentiviral vector backbone (pRRL SFFV d20GFP.T2A.mTagBFP Donor was a gift from A, Scharenberg; Addgene plasmid, 31485), yielding the plasmid containing pRRL-SFFV-reporter plasmid. .. Viral particles were generated by polyethylenimine transfection (Polysciences) of the pRRL-SFFV-reporter plasmid, together with the helper plasmids pCMVR8.74 (a gift from D. Trono (Addgene plasmid, 22036) and pCMV-VSV-G (a gift from B. Weinberg; Addgene plasmid, 8454) into LentiX-cells (Takara) according to standard procedures.

    Article Title: Structure of the human core transcription-export complex reveals a hub for multivalent interactions
    Article Snippet: .. For endogenous purification of THO–UAP56 from human K562 cells, the THOC1 cDNA and a C-terminal 3CAID-GFP tag were cloned into a lentiviral vector backbone (Addgene plasmid #31485), yielding a plasmid containing pRRL-SFFV-THOC1-3C-AID-GFP. ..

    Article Title: Structure of the human core transcription-export complex reveals a hub for multivalent interactions
    Article Snippet: .. For endogenous purification of THO–UAP56 from human K562 cells, the THOC1 cDNA and a C-terminal 3C-AID-GFP tag were cloned into a lentiviral vector backbone (Addgene plasmid #31485), yielding a plasmid containing pRRL-SFFV-THOC1-3C-AID-GFP. ..

    Article Title: Engineering programmable CAR and antigen pairing via drug-gated light activation.
    Article Snippet: The truncated CD19 (tCD19) reporter was constructed by replacing CD19CAR with tCD19 (amino acid 1-313) as amplified from Addgene #174610 with codon optimization for human cell line expression (Integrated DNA Technologies, CA). .. For lentivirus production, the lentiviral vector backbone from Addgene #79125 was used. .. For adeno-associated virus (AAV) production, the AAV2 vector backbone from Addgene #59462 was used.

    Article Title: mRNA recognition and packaging by the human transcription-export complex.
    Article Snippet: .. Wild-type ALYREF or mutant ALYREF(M-c+∆d) cDNA and a N-terminal 3×Flag tag were cloned into a lentiviral vector backbone (Addgene, plasmid 1485), producing a plasmid containing pRRL-SFFV 3×-Flag-Aly/ REF-p2a-mCherry. .. For an overexpression of ALYREF variants in K562 THOC1–GFP-overexpressing cells, lentiviral particles carrying the 3×-Flag-ALYREF constructs were generated using Lenti-X cells (Takara) by polyethylenimine transfection (Polysciences) of the viral plasmid and helper plasmids pCMVR8.74 (Addgene plasmid, 22036) and pCMV-VSV-G (Addgene, plasmid 8454) according to standard procedures.

    Article Title: Intrinsic RNA targeting constrains the utility of CRISPR-Cas13 systems
    Article Snippet: .. The following plasmid backbones were used in this study: lentiCRISPR v2 (lentiv2, Addgene #52961): a lentiviral vector backbone, U6 promoter expresses Cas9 sgRNA scaffold; EF1α promoter expresses Cas9 and PuroR (puromycin resistance) with P2A linker; lentiGuide-puro (Addgene #52963): an empty lentiviral vector expresses Cas9 sgRNA under U6 promoter with puromycin resistance; lenti-Cas9-blast (Addgene #52962): a lentiviral vector expresses Cas9 protein and blasticidin resistance under EF1α promoter. pHAGE-EF1α-puro: an empty lentiviral vector backbone, EF1α promoter drives expression of inserted cDNA; SV40 promoter expresses PuroR; pcDNA3.1: a derivative of pcDNA3.1-HA (Addgene #128034) vector, without HA tag; lentiv2-w/o Cas9: a derivative of the lentiCRISPR v2 vector with Cas9 open reading frame (ORF) removal; pET-28a(+): bacterial vector for expression of N-terminally 6xHis-tagged proteins with a thrombin site. ..

    Article Title: Memory cytotoxic SARS-CoV-2 spike protein-specific CD4+ T cells associate with viral control
    Article Snippet: .. In brief, the cDNA for the human ACE2 gene (ENSG00000130234) was cloned into a lentiviral vector backbone (Addgene plasmid ID 17488), then cotransfected with packaging plasmids pMD2.G and psPAX2 into HEK293-TLA using PEIpro (Polyplus) to produce lentivirus. ..

    Purification:

    Article Title: Structure of the human core transcription-export complex reveals a hub for multivalent interactions
    Article Snippet: .. For endogenous purification of THO–UAP56 from human K562 cells, the THOC1 cDNA and a C-terminal 3CAID-GFP tag were cloned into a lentiviral vector backbone (Addgene plasmid #31485), yielding a plasmid containing pRRL-SFFV-THOC1-3C-AID-GFP. ..

    Article Title: Structure of the human core transcription-export complex reveals a hub for multivalent interactions
    Article Snippet: .. For endogenous purification of THO–UAP56 from human K562 cells, the THOC1 cDNA and a C-terminal 3C-AID-GFP tag were cloned into a lentiviral vector backbone (Addgene plasmid #31485), yielding a plasmid containing pRRL-SFFV-THOC1-3C-AID-GFP. ..

    Mutagenesis:

    Article Title: mRNA recognition and packaging by the human transcription-export complex.
    Article Snippet: .. Wild-type ALYREF or mutant ALYREF(M-c+∆d) cDNA and a N-terminal 3×Flag tag were cloned into a lentiviral vector backbone (Addgene, plasmid 1485), producing a plasmid containing pRRL-SFFV 3×-Flag-Aly/ REF-p2a-mCherry. .. For an overexpression of ALYREF variants in K562 THOC1–GFP-overexpressing cells, lentiviral particles carrying the 3×-Flag-ALYREF constructs were generated using Lenti-X cells (Takara) by polyethylenimine transfection (Polysciences) of the viral plasmid and helper plasmids pCMVR8.74 (Addgene plasmid, 22036) and pCMV-VSV-G (Addgene, plasmid 8454) according to standard procedures.

    Expressing:

    Article Title: Intrinsic RNA targeting constrains the utility of CRISPR-Cas13 systems
    Article Snippet: .. The following plasmid backbones were used in this study: lentiCRISPR v2 (lentiv2, Addgene #52961): a lentiviral vector backbone, U6 promoter expresses Cas9 sgRNA scaffold; EF1α promoter expresses Cas9 and PuroR (puromycin resistance) with P2A linker; lentiGuide-puro (Addgene #52963): an empty lentiviral vector expresses Cas9 sgRNA under U6 promoter with puromycin resistance; lenti-Cas9-blast (Addgene #52962): a lentiviral vector expresses Cas9 protein and blasticidin resistance under EF1α promoter. pHAGE-EF1α-puro: an empty lentiviral vector backbone, EF1α promoter drives expression of inserted cDNA; SV40 promoter expresses PuroR; pcDNA3.1: a derivative of pcDNA3.1-HA (Addgene #128034) vector, without HA tag; lentiv2-w/o Cas9: a derivative of the lentiCRISPR v2 vector with Cas9 open reading frame (ORF) removal; pET-28a(+): bacterial vector for expression of N-terminally 6xHis-tagged proteins with a thrombin site. ..



    Similar Products

    96
    ATCC third generation lentiviral transfer vector backbone pelns xbai kozak β2m gs linker mr1
    Third Generation Lentiviral Transfer Vector Backbone Pelns Xbai Kozak β2m Gs Linker Mr1, supplied by ATCC, used in various techniques. Bioz Stars score: 96/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/MR1/pmc12461623__mmc7-484-97-94
    Average 96 stars, based on 1 article reviews
    third generation lentiviral transfer vector backbone pelns xbai kozak β2m gs linker mr1 - by Bioz Stars, 2026-09
    96/100 stars
      Buy from Supplier

    96
    OriGene plenti c myc ddk p2a puro expression vector backbone
    Plenti C Myc Ddk P2a Puro Expression Vector Backbone, supplied by OriGene, used in various techniques. Bioz Stars score: 96/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/pLenti-C-Myc-DDK-P2A-Puro+Lentiviral+Gene+Expression+Vector/bio_rxiv__64898__2026__03__19__712351-233-8-13
    Average 96 stars, based on 1 article reviews
    plenti c myc ddk p2a puro expression vector backbone - by Bioz Stars, 2026-09
    96/100 stars
      Buy from Supplier

    93
    Addgene inc lentiviral vector backbone
    Lentiviral Vector Backbone, supplied by Addgene inc, used in various techniques. Bioz Stars score: 93/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/pHR_PGK_antiCD19_synNotch_Gal4VP64+(Plasmid+%2379125)/pm41856998-208-4-8
    Average 93 stars, based on 1 article reviews
    lentiviral vector backbone - by Bioz Stars, 2026-09
    93/100 stars
      Buy from Supplier

    93
    Addgene inc lentiviral backbone vector
    Lentiviral Backbone Vector, supplied by Addgene inc, used in various techniques. Bioz Stars score: 93/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/LV+1-5+(Plasmid+%2368411)/bio_rxiv__64898__2026__03__10__710185-154-6-11
    Average 93 stars, based on 1 article reviews
    lentiviral backbone vector - by Bioz Stars, 2026-09
    93/100 stars
      Buy from Supplier

    96
    Addgene inc lentiviral backbone vector plko 1
    Lentiviral Backbone Vector Plko 1, supplied by Addgene inc, used in various techniques. Bioz Stars score: 96/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/pLKO%2E1+puro+(Plasmid+%238453)/pmc12959293-96-1-5
    Average 96 stars, based on 1 article reviews
    lentiviral backbone vector plko 1 - by Bioz Stars, 2026-09
    96/100 stars
      Buy from Supplier

    93
    Addgene inc lentiviral backbone vectors
    ( A ) Inducible gRNA barcode design: A spacer-blocking hairpin structure is engineered to include a 15-base semirandom genetic barcode within the hairpin loop. In addition, an 8A8G poly(A) tail is appended at the 3′ end of the barcoding gRNA. ( B ) Oligo-CALL system constructs: (i) Dual gRNA barcoding construct: two distinct barcoding gRNA, each driven by human or mouse U6 promoters, separately, with Thy1.1 as a constitutive selection marker. (ii) The green fluorescent protein (GFP) reporter construct: contains three tandem repeats of the barcoding gRNA target site upstream of a miniCMV (minimal cytomegalovirus) promoter controlling GFP expression; blue fluorescent protein (BFP) serves as a selection marker. (iii) CRISPRa construct: constitutively expresses dCas9-VPR [deactivated Cas9 fused to a transcriptional activator VPR (VP64, p65, and Rta)] and the red fluorescent protein (RFP; Cherry variant). All constructs use the <t>lentiviral</t> backbone to facilitate efficient cell transduction. hU6, human U6; mU6, mouse U6; EF1α, elongation factor-1 alpha promoter. ( C ) GFP activation with Oligo-CALL system: In the default state, a self-folding hairpin within the gRNA spacer prevents CRISPRa from activating GFP expression. Introduction of BC-ASOs disrupts this hairpin, exposing the gRNA spacer and enabling robust GFP expression. Representative fluorescence images show strong GFP induction following BC-ASO transfection, in contrast to minimal activation in cells receiving no ASO or mismatched ASOs (mis ASOs). ( D to F ) Flow cytometry analyses of GFP activation in Oligo-CALL–labeled cells: H358 cells bearing BC1 barcodes were transfected with ASOs against BC1. Flow cytometry shows the percentage of GFP + cells (D and E) and the mean fluorescent intensity (F) across the overall population (48 hours post-ASO transfection; n = 2 biological replicates). MFI, mean fluorescence intensity. Cont., control.
    Lentiviral Backbone Vectors, supplied by Addgene inc, used in various techniques. Bioz Stars score: 93/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/Dual-sgRNA_hU6-mU6+(Plasmid+%23154194)/pmc12594195-206-0-22
    Average 93 stars, based on 1 article reviews
    lentiviral backbone vectors - by Bioz Stars, 2026-09
    93/100 stars
      Buy from Supplier

    93
    Addgene inc lentiviral vectors
    ( A ) Inducible gRNA barcode design: A spacer-blocking hairpin structure is engineered to include a 15-base semirandom genetic barcode within the hairpin loop. In addition, an 8A8G poly(A) tail is appended at the 3′ end of the barcoding gRNA. ( B ) Oligo-CALL system constructs: (i) Dual gRNA barcoding construct: two distinct barcoding gRNA, each driven by human or mouse U6 promoters, separately, with Thy1.1 as a constitutive selection marker. (ii) The green fluorescent protein (GFP) reporter construct: contains three tandem repeats of the barcoding gRNA target site upstream of a miniCMV (minimal cytomegalovirus) promoter controlling GFP expression; blue fluorescent protein (BFP) serves as a selection marker. (iii) CRISPRa construct: constitutively expresses dCas9-VPR [deactivated Cas9 fused to a transcriptional activator VPR (VP64, p65, and Rta)] and the red fluorescent protein (RFP; Cherry variant). All constructs use the <t>lentiviral</t> backbone to facilitate efficient cell transduction. hU6, human U6; mU6, mouse U6; EF1α, elongation factor-1 alpha promoter. ( C ) GFP activation with Oligo-CALL system: In the default state, a self-folding hairpin within the gRNA spacer prevents CRISPRa from activating GFP expression. Introduction of BC-ASOs disrupts this hairpin, exposing the gRNA spacer and enabling robust GFP expression. Representative fluorescence images show strong GFP induction following BC-ASO transfection, in contrast to minimal activation in cells receiving no ASO or mismatched ASOs (mis ASOs). ( D to F ) Flow cytometry analyses of GFP activation in Oligo-CALL–labeled cells: H358 cells bearing BC1 barcodes were transfected with ASOs against BC1. Flow cytometry shows the percentage of GFP + cells (D and E) and the mean fluorescent intensity (F) across the overall population (48 hours post-ASO transfection; n = 2 biological replicates). MFI, mean fluorescence intensity. Cont., control.
    Lentiviral Vectors, supplied by Addgene inc, used in various techniques. Bioz Stars score: 93/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/lenti+sgRNA(MS2)_puro+optimized+backbone+(Plasmid+%2373797)/pmc12400928-62-11-16
    Average 93 stars, based on 1 article reviews
    lentiviral vectors - by Bioz Stars, 2026-09
    93/100 stars
      Buy from Supplier

    95
    Addgene inc guide rna lentiviral expression vector
    ( A ) Inducible gRNA barcode design: A spacer-blocking hairpin structure is engineered to include a 15-base semirandom genetic barcode within the hairpin loop. In addition, an 8A8G poly(A) tail is appended at the 3′ end of the barcoding gRNA. ( B ) Oligo-CALL system constructs: (i) Dual gRNA barcoding construct: two distinct barcoding gRNA, each driven by human or mouse U6 promoters, separately, with Thy1.1 as a constitutive selection marker. (ii) The green fluorescent protein (GFP) reporter construct: contains three tandem repeats of the barcoding gRNA target site upstream of a miniCMV (minimal cytomegalovirus) promoter controlling GFP expression; blue fluorescent protein (BFP) serves as a selection marker. (iii) CRISPRa construct: constitutively expresses dCas9-VPR [deactivated Cas9 fused to a transcriptional activator VPR (VP64, p65, and Rta)] and the red fluorescent protein (RFP; Cherry variant). All constructs use the <t>lentiviral</t> backbone to facilitate efficient cell transduction. hU6, human U6; mU6, mouse U6; EF1α, elongation factor-1 alpha promoter. ( C ) GFP activation with Oligo-CALL system: In the default state, a self-folding hairpin within the gRNA spacer prevents CRISPRa from activating GFP expression. Introduction of BC-ASOs disrupts this hairpin, exposing the gRNA spacer and enabling robust GFP expression. Representative fluorescence images show strong GFP induction following BC-ASO transfection, in contrast to minimal activation in cells receiving no ASO or mismatched ASOs (mis ASOs). ( D to F ) Flow cytometry analyses of GFP activation in Oligo-CALL–labeled cells: H358 cells bearing BC1 barcodes were transfected with ASOs against BC1. Flow cytometry shows the percentage of GFP + cells (D and E) and the mean fluorescent intensity (F) across the overall population (48 hours post-ASO transfection; n = 2 biological replicates). MFI, mean fluorescence intensity. Cont., control.
    Guide Rna Lentiviral Expression Vector, supplied by Addgene inc, used in various techniques. Bioz Stars score: 95/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/lentiviral+vector+backbone/lenti+sgRNA(MS2)_zeo+backbone+(Plasmid+%2361427)/pmc10372678__pnas__2305187120__sapp-96-17-22
    Average 95 stars, based on 1 article reviews
    guide rna lentiviral expression vector - by Bioz Stars, 2026-09
    95/100 stars
      Buy from Supplier

    Image Search Results


    ( A ) Inducible gRNA barcode design: A spacer-blocking hairpin structure is engineered to include a 15-base semirandom genetic barcode within the hairpin loop. In addition, an 8A8G poly(A) tail is appended at the 3′ end of the barcoding gRNA. ( B ) Oligo-CALL system constructs: (i) Dual gRNA barcoding construct: two distinct barcoding gRNA, each driven by human or mouse U6 promoters, separately, with Thy1.1 as a constitutive selection marker. (ii) The green fluorescent protein (GFP) reporter construct: contains three tandem repeats of the barcoding gRNA target site upstream of a miniCMV (minimal cytomegalovirus) promoter controlling GFP expression; blue fluorescent protein (BFP) serves as a selection marker. (iii) CRISPRa construct: constitutively expresses dCas9-VPR [deactivated Cas9 fused to a transcriptional activator VPR (VP64, p65, and Rta)] and the red fluorescent protein (RFP; Cherry variant). All constructs use the lentiviral backbone to facilitate efficient cell transduction. hU6, human U6; mU6, mouse U6; EF1α, elongation factor-1 alpha promoter. ( C ) GFP activation with Oligo-CALL system: In the default state, a self-folding hairpin within the gRNA spacer prevents CRISPRa from activating GFP expression. Introduction of BC-ASOs disrupts this hairpin, exposing the gRNA spacer and enabling robust GFP expression. Representative fluorescence images show strong GFP induction following BC-ASO transfection, in contrast to minimal activation in cells receiving no ASO or mismatched ASOs (mis ASOs). ( D to F ) Flow cytometry analyses of GFP activation in Oligo-CALL–labeled cells: H358 cells bearing BC1 barcodes were transfected with ASOs against BC1. Flow cytometry shows the percentage of GFP + cells (D and E) and the mean fluorescent intensity (F) across the overall population (48 hours post-ASO transfection; n = 2 biological replicates). MFI, mean fluorescence intensity. Cont., control.

    Journal: Science Advances

    Article Title: Oligo-CALL: A next-generation barcoding platform for studying resistance to targeted therapy

    doi: 10.1126/sciadv.adw9990

    Figure Lengend Snippet: ( A ) Inducible gRNA barcode design: A spacer-blocking hairpin structure is engineered to include a 15-base semirandom genetic barcode within the hairpin loop. In addition, an 8A8G poly(A) tail is appended at the 3′ end of the barcoding gRNA. ( B ) Oligo-CALL system constructs: (i) Dual gRNA barcoding construct: two distinct barcoding gRNA, each driven by human or mouse U6 promoters, separately, with Thy1.1 as a constitutive selection marker. (ii) The green fluorescent protein (GFP) reporter construct: contains three tandem repeats of the barcoding gRNA target site upstream of a miniCMV (minimal cytomegalovirus) promoter controlling GFP expression; blue fluorescent protein (BFP) serves as a selection marker. (iii) CRISPRa construct: constitutively expresses dCas9-VPR [deactivated Cas9 fused to a transcriptional activator VPR (VP64, p65, and Rta)] and the red fluorescent protein (RFP; Cherry variant). All constructs use the lentiviral backbone to facilitate efficient cell transduction. hU6, human U6; mU6, mouse U6; EF1α, elongation factor-1 alpha promoter. ( C ) GFP activation with Oligo-CALL system: In the default state, a self-folding hairpin within the gRNA spacer prevents CRISPRa from activating GFP expression. Introduction of BC-ASOs disrupts this hairpin, exposing the gRNA spacer and enabling robust GFP expression. Representative fluorescence images show strong GFP induction following BC-ASO transfection, in contrast to minimal activation in cells receiving no ASO or mismatched ASOs (mis ASOs). ( D to F ) Flow cytometry analyses of GFP activation in Oligo-CALL–labeled cells: H358 cells bearing BC1 barcodes were transfected with ASOs against BC1. Flow cytometry shows the percentage of GFP + cells (D and E) and the mean fluorescent intensity (F) across the overall population (48 hours post-ASO transfection; n = 2 biological replicates). MFI, mean fluorescence intensity. Cont., control.

    Article Snippet: Lentiviral backbone vectors—Dual-sgRNA (plasmid #154194), CaTCH_empty (plasmid #157746), and dCas9-VPR_P2A_mCherry (plasmid #154193), developed initially in A. Obenauf’s laboratory ( )—were obtained from Addgene.

    Techniques: Blocking Assay, Construct, Selection, Marker, Expressing, Variant Assay, Transduction, Activation Assay, Fluorescence, Transfection, Flow Cytometry, Labeling, Control