Generation of kidney organoids from human pluripotent stem cells
Authors: Minoru Takasato; Pei X Er; Han S Chiu; Melissa H Little
Step 1: iPSC/ESC maintainance
day 0 ~ 1
culture “adherent” human PSC in “MEF-CM” for “1” days. For ECM, use “Matrigel” at “N/A” “N/A”. Medium should contain factors shown in the following table, and should be changed once in “1” days.
| concentration | unit | |
|---|---|---|
| FGF | 1.0e-5 | g/l |
| PSA | — | — |
| knockout serum replacement | — | — |
| NEAA | — | — |
| GlutaMAX | — | — |
| 2-mercaptoethanol | — | — |
Ideally, “PSC” should be obtained at the end of culture.
Step 2: Primitive streak 1
day 1 ~ 3
culture “adherent” human PSC in “APEL medium” for “2” days. For ECM, use “Matrigel” at “N/A” “N/A”. Medium should contain factors shown in the following table, and should be changed once in “2” days.
| concentration | unit | |
|---|---|---|
| CHIR90021 | 8.0e-6 | mol/l |
| antibiotic-antimycotic | 0.5 | % |
Ideally, “PS” should express “TBXT”, “MIXL1” at the end of culture.
Step 3: mesoderm 1
day 3 ~ 5
culture “adherent” human PSC in “APEL medium” for “2” days. For ECM, use “Matrigel” at “N/A” “N/A”. Medium should contain factors shown in the following table, and should be changed once in “2” days.
| concentration | unit | |
|---|---|---|
| FGF9 | 2.0e-4 | g/l |
| Heparin | 0.001 | g/l |
| antibiotic-antimycotic | 0.5 | % |
Ideally, “IM” should express “GATA3”, “HOXD11” at the end of culture.
Step 4: endothelial 1
day 5 ~ 7
culture “spheroid” human PSC in “APEL medium” for “2” days. Medium should contain factors shown in the following table, and should be changed once in “2” days.
| concentration | unit | |
|---|---|---|
| CHIR90021 | 5.0e-6 | mol/l |
| FGF9 | 2.0e-4 | g/l |
| antibiotic-antimycotic | 0.5 | % |
| Heparin | 0.001 | g/l |
Ideally, “EC” should express “PECAM1”, “KDR”, “SOX17” at the end of culture.
Step 5: endothelial 2
day 7 ~ 9
culture “spheroid” human PSC in “APEL medium” for “2” days. Medium should contain factors shown in the following table, and should be changed once in “2” days.
| concentration | unit | |
|---|---|---|
| antibiotic-antimycotic | 0.5 | % |
| Heparin | 0.001 | g/l |
Ideally, “EC” should be obtained at the end of culture.