JoVE Encyclopedia of Experiments
Neurowetenschap
0 weergaven • 4:22 min • July 8th, 2025
Take a microplate containing an adherent culture of mouse embryonic fibroblasts, or MEFs, in a medium.
The adhered MEFs function as a feeder layer, providing a supportive cell culture microenvironment.
Remove the medium and introduce human induced pluripotent stem cells, or hiPSCs, in an hiPSC medium supplemented with small molecules that enhance cell survival.
Incubate to allow hiPSCs to adhere to the feeder layer, which secretes growth factors that facilitate hiPSC proliferation.
Remove the medium and add an enzyme solution to detach the cells. Transfer the cells and centrifuge them, then remove the supernatant and resuspend them in the hiPSC medium.
Transfer the cells to a biopolymer-coated plate. Incubate to allow the MEFs to adhere.
Transfer the suspended hiPSCs to a V-bottom microplate. Centrifuge the cells and incubate them, inducing cell aggregate formation.
Replenish with a differentiation medium. The medium's nutrients and cell-cell interactions within the aggregate facilitate hiPSC differentiation into neural progenitor cells.
For this protocol, begin with establishing feeder cells. To establish this culture, plate 600,000 feeder cells into each well of a six-well plate, with 300 milliliters of medium per well. After culturing the feeder cells for 48 hours, replace the medium, and incubate the plates for an hour, while preparing the stem cells.
Thaw the stem cells in a 37 degrees Celsius water bath. Once thawed, transfer the cells to a 15-milliliter conical tube and fill the tube to 5 milliliters with culture medium, added dropwise. Next, gently centrifuge the cells for four minutes. Aspirate the supernatant, and gently resuspend the pellet in 1 milliliter of stem cell medium with ROCK inhibitor.
After quantifying the cell density, plate 300,000 stem cells onto the feeder cells. Then, grow and expand the cultures, periodically selecting for healthy cells. After expansion and freezing cells for backup, grow the stem cells' colonies on standard plates until they reach 50% to 70% confluence.
Then, use a mild enzymatic treatment and gentle titration with a 1-milliliter pipette tip to harvest the HIPSCs for neural precursor cell differentiation. Gently centrifuge the suspension, aspirate the supernatant, and resuspend the pellet in 5 milliliters human iPSC medium. Then, transfer the cell suspension to a 0.1% gelatin-coated 5-centimeter cell culture dish, and incubate the plate for one hour.
After an hour, transfer the non-adherent cells to a 15-milliliter centrifuge tube. Then, gently rinse the plate with 3 milliliters of medium, and transfer it to the same tube. Next, repeat the resuspension step with gentle centrifugation.
Then, determine the cell density and plate the cells into a 96-well, low-adhesion V-bottom plate at 9,000 cells per well. Now, spin the plate for three minutes and start culturing the cells. Over the next 14 days, every other day, replace half the medium with fresh differentiating medium one.
Dit artikel beschrijft een protocol voor het differentiëren van menselijke geïnduceerde pluripotente stamcellen (hiPSCs) naar neurale progenitorcellen met behulp van embryonale fibroblasten van muizen (MEFs) als feederlaag. Het proces omvat verschillende stappen, waaronder celkweek, detachering en incubatie om celaggregatie en differentiatie te bevorderen.
De differentiatie van hiPSCs tot neurale progenitorcellen maakt mechanische risicoreductie mogelijk bij vroege targetvalidatie in de neurowetenschappen door een mensrelevant, schaalbaar systeem te bieden voor het onderzoeken van signaalpaden. Deze benadering versterkt het voorspellend vertrouwen bij de identificatie van lead-candidates door neurodevelopmentale mechanismen in een fysiologische context te modelleren. Dit pakt een cruciaal omslagpunt in het ontdekkingsproces aan, waarbij biologische relevantie en de reproduceerbaarheid van assays van invloed zijn op beslissingen over de triage van de portfolio.
De methode integreert in het ontdekkingscontinuüm van targetvalidatie tot lead-identificatie door het leveren van een schaalbaar, menselijk neuraal systeem voor mechanistische en fenotypische screening.
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Laatst bijgewerkt: 29 augustus 2026