Organoid Electroporation: A Method to Transfect Plasmid DNA into Gastrointestinal Organoids
Published: April 30, 2023
Abstract
Source: Gaebler, A. M.et al. Universal and Efficient Electroporation Protocol for Genetic Engineering of Gastrointestinal Organoids. J. Vis. Exp. (2020).
This video describes the electroporation protocol for transfecting large plasmids into three-dimensional gastrointestinal organoids to prove its universal functionality in different entities, namely pancreatic ductal adenocarcinoma (PDAC), colorectal cancer (CRC), cholangiocarcinoma (CCC), and gastric cancer (GC) organoids.
Protocol
1. Organoid Culture and Preparations Before Electroporation Establish organoids by tissue digestion as described previously and expand them with their corresponding entity specific culture medium in a basement matrix overview see Table 1 and Table of Materials NOTE: For human tissue samples informed consent and approval of the study by an ethical committee is necessary. Prewarm 48-well plates at 37 °C for post-electroporation seeding.</l…
Representative Results
Figure 1: Electroporation preparation workflow. First, organoids ought to be dissociated to clusters of 10-15 cells and antibiotics should get washed out. After electroporation the white foam needs to be dissociated. Cells can be seeded after regenerating for 40 min at room temperature. P…
開示
The authors have nothing to disclose.
Materials
| [Leu15] Gastrin | Sigma-Aldrich | G9145 | |
| A83-01 | Tocris Bioscience | 2939 | |
| Advanced DMEM/F-12 | Invitrogen | 12634010 | |
| B27 | Invitrogen | 17504044 | |
| B27 Supplement, minus vitamin A | Thermo Fisher Scientific | 12587010 | |
| CHIR99021 | Stemgent | 04-2004 | |
| Collagenase II | Life Technologies | 17101-015 | |
| Collagenase XI | Sigma-Aldrich | C9407-100MG | |
| Collagenase D | Roche | 11088866001 | |
| Dispase II | Roche | 4942078001 | |
| Dnase I | Sigma-Aldrich | D5319 | |
| D-sorbitol | Roth | 6213.1 | |
| Dithiothreitol | Thermo Scientific | 1859330 | |
| EDTA | Roth | 8040 | |
| Forskolin | Tocris Bioscience | 1099 | |
| Glutamax | Life Technologies | 35050061 | |
| Hepes | Thermo Fisher Scientific | 15630106 | |
| hFGF-10 | Preprotech | 100-26 | |
| KCl | Sigma-Aldrich | P9541 | |
| KH2PO4 | Roth | 3904.2 | |
| Matrigel | Corning | 356231 | basement matrix |
| mEGF | Invitrogen | PMG8043 | |
| N2 | Invitrogen | 17502048 | |
| NaCl | Roth | 3957.1 | |
| Na2HPO4 | Roth | K300.2 | |
| N-Acetyl-L-Cystein | Sigma-Aldrich | A9165 | |
| Nicotinamid | Sigma-Aldrich | N0636 | |
| Noggin | n.a. | n.a. | Conditioned medium produced from HEK293 cells (Hek293- mNoggin-Fc) |
| Recombinant Human HGF | Preprotech | 100-39H | |
| Rspondin | n.a. | n.a. | Conditioned medium produced from HEK293 cells (HA-Rspo1- Fc-293T) |
| SB202190 | Sigma-Aldrich | S7067 | |
| TrypLE Express | Gibco | 12604021 | Dissociation reagent |
| Wnt3A | n.a. | n.a. | Conditioned medium produced from L-Wnt3a cells (from Sylvia Boj) |
| Y-27632 | Sigma-Aldrich | Y0503 | |
| 48-well plate | Corning | 3548 | |
| Nepa Electroporation Cuvettes 2mm gap w/pipettes | Nepa Gene Co., Ltd. | EC-002S | |
| Electroporator Nepa21 | Nepa Gene Co., Ltd. | n.a. | |
| EVOS FL Auto | Invitrogen | AMAFD1000 | Fluorescence microscope |
| EndoFree Plasmid Maxi Ki | Qiagen | 12362 | |
| Opti-MEM | Gibco | 31985047 | Electroporation buffer |
| 2 gRNA concatemer vector | AddGene | 84879 | |
| px458 plasmid | AddGene | 48138 | coding for sgRNA and Cas9 |
| px458_Conc2 plasmid | AddGene | 134449 | px458 plasmid containing 2x U6 promotors for two different sgRNAs |
