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52 protocols using c10337

1

Fgf8.L Expression and Cell Proliferation

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Ex vivo limbs were cultured with 10 μM EdU (ThermoFisher Scientific, C10337) for 3 days in dark foiled cover. Afterwards, samples were fixed and Fgf8.L mRNA was stained using the HCR protocol, followed by cryosectioning, as described above. Sections were subjected to the Click-It reaction, as described in the manufacturer's protocol (ThermoFisher Scientific, C10337). Hoechst was added at the end of the protocol. Samples were visualized by confocal microscopy as described above. Fgf8.L-positive cells, and both EdU- and Fgf8.L-positive cells on the amputation plane were manually counted, and the percentage of EdU-positive Fgf8.L-positive cells were calculated for each sample.
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2

Proliferation Assay for Hepatocyte Organoids

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Human hepatocyte organoids were transferred to 96-well µ-clear bottom plates (Greiner Bio-One, 655090) for EdU proliferation assay (Thermo Fisher Scientific, C10214 and C10337). Hepatocyte organoids were fixed in 4% PFA (Thermo Fisher Scientific, J19943) o/n at 4 °C. On the next day, organoids were washed thrice with PBS+ containing 0.1% Triton X-100 (wash buffer, AppliChem) and blocked for 30 min at RT in PBS+ containing 0.1% Triton X-100, 10% NDS and 1% BSA (blocking solution). The EdU proliferation assay was performed according to the manufacturer’s instructions (Thermo Fisher Scientific, C10214 and C10337). For (additional) whole mount staining, organoids were washed thrice with wash buffer and incubated with rabbit anti-HNF4α (Cell Signaling, C11F12, 3113, 1/250) diluted in blocking solution for 2 h at RT or o/n at 4 °C. Both before and after the addition of the secondary antibody, the organoids were washed thrice in wash buffer. The antibodies were as follows: donkey anti-rabbit Alexa Fluor 555 (Invitrogen, A-31572, 1/500) and DAPI (Sigma-Aldrich, D9542, 1/1000). The incubation time was 2 h at RT. All steps were performed under agitation. (Z-stack) images were acquired using LSM (LSM 710, Zeiss), and analyses were done with Fiji. Organoid area was measured with a free hand selection tool, and EdU+ cells were counted manually in a blinded manner.
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3

Multicolor Visualization of Replicating Cells

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Cells grown until A 600 of ~0.1 were labelled with 10 μM EdU (5-Ethynyl-2´-deoxyuridine, Thermofisher, C10337) for 15 min after which cells were washed, introduced to fresh media containing 60 μg/ml thymidine and allowed to grow for 3 h. Following this, cells were fixed with 4% PFA (v/v) for 30 min and permeabilized with 0.5% Triton X-100 (v/v) for 30 min. EdU click-chemistry reaction was conducted following the instructions (Thermofisher, #C10337) using Alexa 488 azide in a final volume of 50 μl for 30 min at room temperature, followed by washing. Cells were then labelled with TMR HaloTag ligand as in (Banaz et al., 2019) . Briefly, cells were incubated with 2 μM TMR ligand for 30 min and washed several times. Finally, nucleoids were labelled with 1 μg/ml DAPI for 15 min and washed, after which the cells were ready for imaging.
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4

Quantifying Fibroblast Proliferation via EdU

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Fibroblasts were pulsed for 1 h with 10 μM EdU (Invitrogen C10337) at 37 °C to label cells in S-phase and then fixed with 4% PFA for 15 min at room temperature. Cells were then treated per the manufacturer’s recommendations to visualize EdU through click-chemistry (Invitrogen C10337). Cells were stained with Hoechst to label nuclei (1:10,000; Thermo Fisher Scientific 62249). Samples were then analyzed for the percentage of cells that were EdU+ .
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5

Induction of Cre Expression and DNA Synthesis Detection

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To induce Ah-cre expression, 80mg kg−1 body weight of β-naphthoflavone (Sigma-Aldrich; N3633) dissolved in corn oil (Sigma-Aldrich; C8267) was administrated into 2-month old mice with 5 injections within 30 hours. For DNA synthesis detection, 100mg kg−1 body weight of BrdU (Sigma-Aldrich; B5002) or 5mg kg−1 body weight of EdU (Life Technologies; C10337) dissolved in sterile phosphate-buffered saline (PBS) was intraperitoneally injected 2 hours or 1 hour before the mice were sacrificed, respectively. EdU staining was performed following manufacturer’s protocol (Life Technologies; C10337).
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6

Induction of Cre Expression and DNA Synthesis Detection

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To induce Ah-cre expression, 80mg kg−1 body weight of β-naphthoflavone (Sigma-Aldrich; N3633) dissolved in corn oil (Sigma-Aldrich; C8267) was administrated into 2-month old mice with 5 injections within 30 hours. For DNA synthesis detection, 100mg kg−1 body weight of BrdU (Sigma-Aldrich; B5002) or 5mg kg−1 body weight of EdU (Life Technologies; C10337) dissolved in sterile phosphate-buffered saline (PBS) was intraperitoneally injected 2 hours or 1 hour before the mice were sacrificed, respectively. EdU staining was performed following manufacturer’s protocol (Life Technologies; C10337).
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7

5-ethnyl-2′-deoxyuridine Cell Labeling Protocol

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One hour prior to euthanasia, mice received a single intraperitoneal injection of 5-ethnyl-2′-deoxyuridine (ThermoFisher A10044) at a dose equimolar to that previously described8 (link) for BrdU (40 μg/g body weight). Tissue was then fixed in formaldehyde and processed in graded sucrose for cryosectioning, as described above. Tissue sections (50 µm thick) were permeabilized for 1 h at room temperature in PBS containing 3% BSA and 0.5% Tween-20, followed by copper catalyzed click labeling with an Alexa 488 azide conjugate (ThermoFisher #C10337) for 45′ at room temperature, several washes in PBS/BSA, and confocal imaging.
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8

EdU Incorporation Assay for Proliferation

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Cells were seeded at a density of 10,000 cells/cm2 in ibidi 8-well plates. After 24 h a 2X working solution of EdU (C10337, ThermoFisher) in EGM was added to the cells for 6 h. 4% paraformaldehyde (PFA) was added to the cell medium for 15 min before washing with 3% BSA in PBS and then 0.5% Triton X- for 20 min. Cells were washed again with 3% BSA before the addition of a Click-iT reaction cocktail (Click-iT reaction buffer, CuSO4 (Component E), Alexa Fluor Azid and Click-iT buffer additive) for 30 min at RT. Cells were washed and incubated in Hoechst 33,342 (Component G) solution 1:2000 in PBS (5 μg/mL) for a further 30 min at RT before washing with PBS. Cells were imaged for Hoechst and EdU (488 nm) with a laser scanning confocal microscope (LSM800, Zeiss) and images quantified with FIJI/ImageJ.56 (link)
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9

Imaging Nuclear Translocation and Colocalization

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Experiments were carried out on cells seeded on cover slips. Cells were fixed with ice-cold methanol for 5 min at -20°C, washed with PBS and stained with DAPI, following which they were mounted onto glass slides using Prolong Gold. For nuclear translocation and co-localization assays, cells were fixed and permeabilized with 4% paraformaldehyde and 0.1% Triton-X. The cells were then blocked with 2.5% BSA and stained with the following antibodies: Rab7 (9367, Cell Signaling.), IRF3 (Cell Signaling, 4302), STING (AF6516), phospho S222 MVB12b (GenScript, Antibody production service) and corresponding secondary antibodies. Images were obtained on Zeiss LSM 710 confocal microscope using a 63× 1.4 oil-immersion objective and data were analyzed using ImageJ software. For click-it chemistry, EdC-labeled (T511307,Sigma) DNA of bacteria were detected in fixed cells according to manufacturer’s instructions (ThermoFisher, C10337) and AlexaFluor488 was detected under the microscope.
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10

EdU Incorporation Detection in Tissue

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EdU (Invitrogen) dissolved in water was injected intraperitoneally at 10 μg/g body weight at 4 h before harvest. EdU incorporation was detected by a click reaction according to manufacturer’s instructions (Thermo Fisher Scientific, C10337). Images were acquired with the Nikon C-1 confocal system.
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