Выделение и культуре клеток из нефрогенной зона эмбриональных почек мышь
Summary
В этом докладе мы описываем метод изоляции и культуры нишу клеток-предшественников из эмбриональных почек мыши, которые могут быть использованы для изучения сигнальных путей, регулирующих стволовых / прогениторных клеток из развивающихся почек. Эти культурные клетки очень доступным для небольшой молекулы и рекомбинантного белка лечения и, что важно также, чтобы вирусная трансдукция, которая позволяет эффективно манипуляции кандидатом путей.
Abstract
Embryonic development of the kidney has been extensively studied both as a model for epithelial-mesenchymal interaction in organogenesis and to gain understanding of the origins of congenital kidney disease. More recently, the possibility of steering naïve embryonic stem cells toward nephrogenic fates has been explored in the emerging field of regenerative medicine. Genetic studies in the mouse have identified several pathways required for kidney development, and a global catalog of gene transcription in the organ has recently been generated http://www.gudmap.org/, providing numerous candidate regulators of essential developmental functions. Organogenesis of the rodent kidney can be studied in organ culture, and many reports have used this approach to analyze outcomes of either applying candidate proteins or knocking down the expression of candidate genes using siRNA or morpholinos. However, the applicability of organ culture to the study of signaling that regulates stem/progenitor cell differentiation versus renewal in the developing kidney is limited as cultured organs contain a compact extracellular matrix limiting diffusion of macromolecules and virus particles. To study the cell signaling events that influence the stem/progenitor cell niche in the kidney we have developed a primary cell system that establishes the nephrogenic zone or progenitor cell niche of the developing kidney ex vivo in isolation from the epithelial inducer of differentiation. Using limited enzymatic digestion, nephrogenic zone cells can be selectively liberated from developing kidneys at E17.5. Following filtration, these cells can be cultured as an irregular monolayer using optimized conditions. Marker gene analysis demonstrates that these cultures contain a distribution of cell types characteristic of the nephrogenic zone in vivo, and that they maintain appropriate marker gene expression during the culture period. These cells are highly accessible to small molecule and recombinant protein treatment, and importantly also to viral transduction, which greatly facilitates the study of candidate stem/progenitor cell regulator effects. Basic cell biological parameters such as proliferation and cell death as well as changes in expression of molecular markers characteristic of nephron stem/progenitor cells in vivo can be successfully used as experimental outcomes. Ongoing work in our laboratory using this novel primary cell technique aims to uncover basic mechanisms governing the regulation of self-renewal versus differentiation in nephron stem/progenitor cells.
Protocol
Discussion
В этом протоколе описывается метод, чтобы изолировать и культуры клеток из нефрогенной зона эмбриональных почек. Это развитие метода первоначально опубликован в рамках изучения последствий BMP7 лечения на клетки нефрогенным зоны (Blank и соавт., 2009). В первоначальном исследовании, сер…
Declarações
The authors have nothing to disclose.
Acknowledgements
Эта работа была поддержана R01 DK078161 от NIDDK (LO), докторской стипендии Американской ассоциации сердца (АВ), Веннер-Грен Основы Швеции и Kungliga Fysiografiska Sällskapet, Лунд, Швеция (UB). Дополнительная поддержка была оказана Мэн медицинский центр научно-исследовательский институт объектов ядра для Гистопатология, биоинформатика и FACS (при поддержке 2P20RR18789-06) и фонд MMCRI животных.
Materials
| Material Name | Tipo | Company | Catalogue Number | Comment |
|---|---|---|---|---|
| Watchmaker’s forceps #5 | Roboz | RS-4905 | 2 pairs required | |
| Collagenase A | Roche | 10 103 578 001 | Wear mask | |
| Porcine Pancreatin | Sigma | P8096 | Wear mask | |
| DPBS w/ Ca, Mg | Lonza | 17-513F | With Mg & Ca | |
| Fetal bovine serum (FBS) | BioWhittaker | 14-901E | ||
| HBSS | Gibco | 14175 | ||
| KSFM | Gibco | 10724-011 | without added growth factors | |
| L-Glutamine 200mM | Sigma | G7513 | Use @ 1% v/v | |
| PenStrep 10,000 U penicillin / ml 10 mg streptomycin / ml | Sigma | P4333 | Use @ 1% v/v | |
| Fibronectin | BD Biosciences | 356008 | Supplied as powder | |
| 24 well culture plate | Thermo Scientific | 142485 | Nunclon | |
| DPBS w/o Mg & Ca | Lonza | 17-512F | ||
| 5mL polystyrene tubes | BD Biosciences | 352235 | ||
| DNase (1 U/μl) | Invitrogen | 18068-015 | 4 μl per 1.5 ml | |
| 40 micron cell-strainer | BD Biosciences | 352235 | w/cap and tube | |
| Paraformaldehyde | Sigma | P6148 | Use @ 4 % w/v | |
| Triton X100 | VWR | VW3929-2 | Use @ 0.3 % v/v | |
| PBS | Sigma | P3813 | Supplied as powder | |
| Donkey serum | Jackson ImmunoResearch | 017-000-121 | Use @ 5 % v/v | |
| Rabbit anti-PAX2 | Invitrogen | 71-6000 | Dilute 1:100 | |
| Rabbit anti-β-gal | MP Biomedicals | 559762 | Dilute 1:200 | |
| Oregon Green 488 phalloidin | Invitrogen | O7466 | Dilute 1:200 | |
| Donkey anti-rabbit Alexa Fluor 568 | Invitrogen | A10042 | Dilute 1:200 | |
| DAPI | Invitrogen | D1306 | Dilute 1:5000 | |
| Vectashield | Vector Laboratories | H-1000 | ||
| Glycerol | EMD | GX0185-6 | Mix 50 % with H2O | |
| RNeasy Micro Kit | Qiagen | 74004 | Use “DNase on column” protocol | |
| Transfer pipettes, 3ml | BD Falcon | 357575 |
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