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15 protocols using plenti c mgfp

1

Overexpression of PKCδ Constructs in Cancer Cells

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PKCδ constructs were purchased from Addgene (75 Sidney Street, Suite 550A Cambridge, MA 02139). PKCδ-C2 domain (Addgene #16388) and wild-type PKCδ (Addgene #16386) were cloned into lentiviral vector pLenti-C-mGFP from OriGene (9620 Medical Center Dr., Suite 200, Rockville, MD 20850) (PS100071) via EcoRI digestion and ligation and transfected via electroporation using a Neon transfection system. 48 h later, positive cells were selected by FACS sorting GFP + population.
PKCδ DN was a gift from Bernard Weinstein (Addgene plasmid # 16389). PKCδ DN contains a K376R mutation. PKC8 DN and wild-type PKCδ (Plasmid #16386) were cloned into OriGene pLenti-C-mGFP (PS100071) and transfected via electroporation into EDU145 shCDCP1. After 48 h, cells positive for PKC8 DN were selected via FACS sorting the GFP + population.
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2

Wnt Pathway Modulation in 293FT and 3T3 Cells

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We transfected 293FT cells grown to 80% confluency in a 12-well plate, using Lipfectamine 2000 (Invitrogen, Carlsbad, CA), with 500 ng of DNA. All cells were transfected with TOPflash or FOPflash reporter plasmids alongside a vector force-expressing ARID3B (pLenti-suCMV-Rsv, Gentarget, San Diego, CA), FZD5 (pLenti-C-mGFP, Origene, Rockville, MD) Wnt5a (pLenti-C-mGFP), or an empty pLenti-C-mGFP vector. All samples were also cotransfected with a Renilla luciferase control to normalize for cell number and transfection efficiency. Luciferase activity was measured using a Promega Dual Luciferase Assay Kit (Promega, Madison, WI) according to the manufacturer's instructions and measured on a TD 20/20 luminometer (Turner Designs, Sunnyvale, CA). A similar experiment was conducted with 3T3 "Leading Light" cells (Enzo Life Sciences, Farmingdale, NY). As these cells express a Wnt Reporter luciferase, they were only transfected with the above-mentioned ARID3B, FZD5, and Wnt5a vectors, and normalized by protein concentration. All conditions were run in triplicate and normalized to the Renilla internal control.
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3

Cloning and Overexpression of AXL

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pDONR223-AXL was obtained from Addgene, Cambridge, MA, USA (Addgene plasmid # 23945) [33 (link)]. AXL cDNA was cloned into the pLenti-C-mGFP (OriGene, Rockville, MD, USA) and SCC-25 cells were transduced with this vector or empty vector as control using lentiviral transduction. Fluorescence-activated cell sorting (FACS) of GFP+ cells (FACSAriaIII, BD Biosciences, Heidelberg, Germany) was used to select positive cells. Overexpression was subsequently estimated via Western blot.
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4

Lentiviral Overexpression of Cyclophilin D in Mice

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Animals received bilateral intrahippocampal administration of Lenti ORF particles (GFP-tagged)-mouse peptidylprolyl isomerase D (Ppid; cyclophilin D) (Type: Human Tagged ORF Clone Lentiviral Particle; Tag: mGFP; Vector: pLenti-C-mGFP, #RC223397L2V, Origene) by stereotaxic injection (Vargas et al., 2014 (link)). A total of n = 5 mice were used per group. We used Sham injection in WT and control tau KO mice. Tau−/− mice were anesthetized using isoflurane and placed in a stereotaxic frame (Stoelting, United States). The skull was exposed for several millimeters anterior and posterior to the bregma. Boreholes were made above the left and right hippocampal CA1 (coordinates: 2.46 mm anterior to the bregma, 1.0 mm lateral, 1.5 mm relative to dura mater). One microliter of the lentiviral vector was injected (108 TU/ml). Three weeks after infection, the animals were subjected to cognitive tests and euthanized immediately after for biochemical analysis.
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5

CRISPR Gene Disruption and Overexpression Validation

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To validate the candidate genes from screening, sgRNAs from the parent library were cloned into pLentiCRISPRv2 (Addgene plasmid 52961). The control sgRNA was used from the parent library. Lentiviruses were produced as described above, and transduced HAP1 or HeLa cells were selected with 1 μg/ml puromycin 24 h post-infection. Two weeks later, puromycin was removed, and cells were allowed to recover for three additional days before analysis. Gene disruption efficiency was verified by Western blot. The sequences of the sgRNAs used are in Additional file 1: Table S9.
The gRNA-resistant construct (OE_RDD1) was made by directed mutagenesis using the Quick-Change kit (Stratagene) following the manufacturer’s protocol. To create the OE_RDD1 construct, the sgRNA targeting site (sgRDD1_B; Additional file 1: Table S9) on pLenti-C-mGFP (Origene) containing human C1orf115 gene (pLenti-C1orf115-mGFP) was changed to gRNA resistance sequence (synonymous mutations) using the following oligonucleotide—sense: 5′-GCC GCT TAT AGC GCT CCT TTC GCT GTA GCC ACC AGC GTG GTA TCC-3′, and anti-sense: 5′-AGC GAA AGG AGC GCT ATA AGC GGC AGC GAA GCC TTG CAG GCC G-3′.
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6

TGFBI Overexpression in HPAECs

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HPAECs were transduced with lentiviral particles (OriGene; control particles pLenti-C-mGFP, PS100071; or TGFBI Lentiviral Particles, RC200411L2V), following the instructions of the manufacturer. Forty-eight hours later, cells were either fixed in 4% paraformaldehyde for immunofluorescence staining with primary antibody (polyclonal TGFBI antibody ab99562; Abcam) or lysed in Trizol for mRNA isolation.
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7

Transient Transfection and Transduction Efficiency Assay

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The plasmid constructs used for transient transfection and transduction were pXOON-eGFP (Addgene, Cambridge MA) and pLenti-C-mGFP (OriGene, Rockville MD), respectively. ACC cells were plated on cover slips in 24-well plate for 24 hrs prior to transient transfection and transduction. For transfection we used Lipofectamine 3000 system (ThermoFisher Scientific, Carlsbad CA) per manufacture’s protocol. Transient transduction using pLenti-C-mGFP was performed according to the standard protocol, and cell were fixed 48% after transduction. Stable cell lines were generated according to the standard protocol with plasmid selection. Cells were grown on coverslips for 48hr, and fixed using ProLong Gold Antifade Mountant with DAPI (ThermoFisher Scientific, Carlsbad CA). Slides were imaged using Nikon Eclipse E600 microscope (Nikon, Tokyo, Japan) equipped with a CoolSnap fx camera (Photometrics, Tucson, AZ, USA) and using ImagePro software (Media Cybernetics, Rockville, MD, USA). Cells that were positive for GFP were directly counted and normalized against the number of cells that were positive for DAPI in any given field. Five such fields were counted for each slide per experiment and average of three experimental replicates was used to calculate the transient transfection and transduction efficiency.
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8

Lentiviral Transduction and Migration Assay

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Plasmids such as pLenti-C-mGFP and pLenti-C-mGFP-KLF6 were purchased from Origene. Virus particles were packaged according to the manufacturer's recommendation and infected into SAS cells. Twenty-four hour post-infection, cells were seeded at a density of 5 × 105/mL in the upper chamber of the 48-well Boyden chamber. The lower chamber contained 20% FBS. The chamber was incubated at 37 °C for 24 h. The cells that migrated to the lower surface of the membrane were fixed in methanol for 10 min and stained with 10% Giemsa for 1 h. The migrated cells were pictured at random five fields and counted.
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9

Overexpression and Knockdown of PRMT7

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To overexpress either C-terminal Myc-tagged or GFP-tagged PRMT7, pLenti-C-MycDDK or pLenti-C-mGFP, respectively, were purchased from Origene. A control vector expressing only GFP or Myc was created via blunt-end digestion and subsequent ligation of the pLenti-C-mGFP-PRMT7 and pLenti-C-MycDDK-PRMT7 vectors, respectively (characterized in Baldwin et al., 2015 (link)). Mutant eIF2α-GST protein from pGEX-4T2 vector was designed: R52R53R54 mutated to KKK, RKK, KRR, RKR, and RRK. Primers were designed using QuickChange Primer Design by Agilent Technologies. These constructs were then subcloned into the pLenti-C-mGFP backbone as described above. To knock down PRMT7, RNA interference was performed using pLKO.1 vectors obtained from The RNAi Consortium containing either an shRNA with a luciferase sequence for control (5′-CAAATCACAGAATCGTCGTAT-3′) or two independent PRMT7 sequences (5′-GCTAACCACTTGGAAGAT­AAA-3′ and 5′-CGATGACTACTGCGTATGGTA-3′).
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10

Lentiviral CD1d1 and IFI204 constructs

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A lentiviral murine Cd1d1 expression construct (pLenti-Cd1d1-mGFP, Cat#MR226027L4) and its matched control construct (pLenti-C-mGFP, Cat#PS100093) were obtained from Origene. Murine Ifi204 expression vector (pLenti-Ifi204-Myc-DDK-Puro, Cat#MR222527L3), together with its control vector (pLenti-C-Myc-DDK-Puro, Cat#PS100092) were also purchased from Origene, and the puromycin selection cassette of these two Origene plasmids were replaced by blasticidin from lentiCRISPRv2-blast plasmid (Addgene#98293) using NEBuilder HiFi DNA Assembly Cloning kit (NEB, Cat#E5520S). For the LLC-1 experiment, the murine Cd1d1 was cloned into the receiving vector N174-MCS (Addgene#81061) with the restriction enzymes EcoR1 and Mlu1, using the FastDigest protocol of Thermo Scientific. All final construct sequences were confirmed by Sanger sequencing. Plasmids generated in this study are available upon written request.
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