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3 protocols using pdon 5 neo vector

1

Genetic Manipulation of Ubap2, Cdh1, and Fosl1 in Cells

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Short hairpin RNAs (shRNAs) against mouse Ubap2 (shUbap2_#1: TRCN0000241149 and shUbap2_#2: TRCN0000241151), mouse Cdh1 (shCdh1_#1: TRCN0000042578, shCdh1_#2: TRCN0000042579, shCdh1_#3: TRCN0000042580, shCdh1_#4: TRCN0000042581, and shCdh1_#5: TRCN0000042582), and mouse Fosl1 (shFosl1_#1: TRCN0000042684, shFosl1_#2: TRCN0000042685, shFosl1_#3: TRCN0000042687, shFosl1_#4: TRCN0000310960, and shFosl1_#5: TRCN0000316021) cloned into the pLKO.1-puro vector were purchased from Sigma-Aldrich (Supplementary Table 7). For Ubap2 overexpression, mouse Ubap2 cDNA was amplified from mouse testis cDNA library using PCR and cloned into the pDON-5 Neo vector (Takara Bio Inc.). shRNAs for Ubap2, Cdh1, and Fosl1 and Ubap2 overexpression constructs were transfected using pPACKH1TM Lentivector Packaging kit (System Biosciences) into 293TN cells for 72 h using Lipofectamine 3000 (Thermo Fisher Scientific Inc.) and then the collected supernatants were used to treat MC3T3-E1 cells or primary monocytes. pLKO.1-puro empty vector and pDON-5 Neo empty vector were used as negative controls.
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2

APN/CD13 Overexpression in B16-F1 Melanoma

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HT1080, B16-F1 melanoma, H1299 and A549 cells were obtained from American Type Culture Collection (ATCC; Manassas, VA, USA). PC14 cells were obtained from Immuno-Biological Laboratories (Gunma, Japan). HT1080, B16-F1, and A549 cells were cultured in DMEM (Gibco, Grand Island, NY, USA), and H1299 and PC14 cells were cultured in RPMI 1640 Medium (Gibco) supplemented with 10% FBS and 1% penicillin-streptomycin. All cells were incubated at 37°C in an atmosphere containing 5% CO2.
A retroviral vector (pDON-5neoCD13; Takara Bio, Shiga, Japan) containing APN/CD13 cDNA and a control pDON-5neo vector were transfected into B16-F1 melanoma cells according to the manufacturer’s protocol. Transfectants resistant to 1 mg/mL G-418 (Promega, Madison, WI, USA) were selected and maintained in DMEM with 10% FBS and 1 mg/mL G-418. From these B16-F1 transfectants, one cell line that expressed high levels of APN/CD13 (APN-B16 cells) and another cell line that did not express APN/CD13 (control-B16 cells) were selected. The expression levels of APN/CD13 were determined by flow cytometry and real-time PCR.
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3

Retroviral Vector Expressing Pig TMPRSS2

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To generate a retroviral vector expressing pig TMPRSS2, the coding sequence of pig TMPRSS2 was synthesized according to the amino acid sequences deposited in GenBank (Acc. Num: NP_001373060) with codon optimization to pig cells (Integrated DNA Technologies, Inc., Coralville, IA, USA). The synthesized DNA sequence is summarized in the S1 File. Synthesized DNA was cloned into the pDON-5 Neo-vector (TaKaRa, Kusatsu, Japan, Cat# 3657), which was prelinearized with NotI-HF (New England Biolabs (NEB), Ipswich, MA, USA, Cat# R3189L) and BamHI-HF (NEB, Cat# R3136L) using an In-Fusion HD Cloning Kit (TaKaRa, Cat# Z9633N). Plasmids were amplified using NEB 5-alpha F′ Iq competent Escherichia coli (NEB, Cat# C2992H) and extracted using the PureYield Plasmid Miniprep System (Promega, Madison, WI, USA, Cat# A1222). The plasmid sequence was verified using a SupreDye v3.1 Cycle Sequencing Kit (M&S TechnoSystems, Osaka, Japan, Cat# 063001) with a Spectrum Compact CE System (Promega).
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