hPSC-derived organoid generation
Materials Required
Principle
This protocol describes hPSC-derived cerebral organoid generation using embryoid body formation, neural induction, extracellular-matrix-supported neuroepithelial expansion, and long-term 3D culture under static, spinning, or air-liquid interface conditions; the readouts are organoid morphology, neuroepithelial organization, neural progenitor and neuronal marker expression, cortical-region identity, axon outgrowth, and functional neural activity when maturation assays are included[1][2][3][4][5][6].
MCE has not independently verified the accuracy of these methods. They are for reference only.
Experimental Materials
• Use feeder-free hPSCs, EB medium containing ROCK inhibitor during early aggregation, neural induction medium, Matrigel or extracellular matrix for embedding/expansion, differentiation medium, and maturation medium; reported protocols use these materials to promote cell aggregation, neural induction, polarized neuroepithelial expansion, and long-term neural maturation[1][4][6].
• Antibodies, probes, dyes, or kits include SOX2, PAX6, NESTIN, TBR2/EOMES, CTIP2/BCL11B, SATB2, MAP2, TUJ1/TUBB3, GFAP, SMI312, and region-specific markers when appropriate; these markers assess neural progenitors, intermediate progenitors, cortical neurons, astrocytes, neurites, and axon tracts[1][2][3][4][6].
• Equipment and instruments include low-adhesion plates for EB formation, standard CO2 incubator culture, stereomicroscopy for morphology, orbital shaker or spinning bioreactor for improved medium exchange, cryostat or vibratome for sectioning when histology is performed, confocal microscopy for marker analysis, and electrophysiology or calcium imaging when functional readouts are required[1][3][4][5][6].
• Antibodies, probes, dyes, or kits include SOX2, PAX6, NESTIN, TBR2/EOMES, CTIP2/BCL11B, SATB2, MAP2, TUJ1/TUBB3, GFAP, SMI312, and region-specific markers when appropriate; these markers assess neural progenitors, intermediate progenitors, cortical neurons, astrocytes, neurites, and axon tracts[1][2][3][4][6].
• Equipment and instruments include low-adhesion plates for EB formation, standard CO2 incubator culture, stereomicroscopy for morphology, orbital shaker or spinning bioreactor for improved medium exchange, cryostat or vibratome for sectioning when histology is performed, confocal microscopy for marker analysis, and electrophysiology or calcium imaging when functional readouts are required[1][3][4][5][6].
Experimental Procedure
• Start with healthy hPSC cultures showing pluripotent morphology and minimal spontaneous differentiation, dissociate cells or colonies according to the selected published protocol, and generate uniform EBs in low-adhesion culture; Lancaster and Knoblich describe EB formation followed by neural induction, Matrigel embedding, expansion, and differentiation, whereas Pașca/Sloan protocols generate cortical spheroids through directed 3D neural differentiation[1][4][6].
• Prepare Matrigel or extracellular matrix on ice when using embedded cerebral organoids, and prepare neural induction, expansion, differentiation, and maturation media according to the selected protocol; do not mix unguided whole-brain organoid parameters with regionalized cortical spheroid parameters unless the experiment explicitly compares protocols[1][4][6].
• Form EBs from hPSCs, culture them through early aggregation with ROCK inhibitor when specified, transfer aggregates to neural induction conditions, and select aggregates showing neuroepithelial morphology for downstream organoid generation; this workflow is directly described in cerebral organoid and cortical spheroid protocols[1][4][6].
• Embed selected neuroepithelial aggregates in Matrigel when following the Lancaster-style cerebral organoid method, then culture embedded organoids in expansion and differentiation media; published protocols use this step to support polarized neuroepithelial buds and subsequent neural tissue growth[1][2].
• Transfer organoids to long-term 3D culture using static culture, orbital shaking, spinning bioreactors, or mini-bioreactors depending on the protocol; Qian et al. used SpinΩ mini-bioreactors to generate forebrain, midbrain, and hypothalamic organoids, while Giandomenico et al. extended cerebral organoid culture for telencephalic identity and later-stage maturation[3][5].
• For advanced maturation, section cerebral organoids and culture slices at an air-liquid interface when the experimental goal is improved neuronal survival, axon outgrowth, and tract-like projections; this approach was reported to generate diverse nerve tracts and functional output[5][7].
• Assess successful organoid generation by morphology, reproducibility across differentiations, and marker expression for neural progenitors, cortical neurons, astrocytes, and region-specific identities; Yoon et al. reported reliable cortical spheroid generation across hPSC lines, and Qian et al. reported cortical-development features including progenitor-zone organization, neurogenesis, gene expression, and outer radial glia in forebrain organoids[3][6][8].
• Use negative controls lacking primary antibody for immunostaining, compare organoids with undifferentiated hPSCs or earlier differentiation stages when lineage progression is tested, and include multiple organoids and independent differentiations when assessing reproducibility; published organoid studies commonly evaluate organoid-to-organoid and batch-level consistency using imaging, marker quantification, transcriptomic analysis, and functional assays[3][6][8].
• Prepare Matrigel or extracellular matrix on ice when using embedded cerebral organoids, and prepare neural induction, expansion, differentiation, and maturation media according to the selected protocol; do not mix unguided whole-brain organoid parameters with regionalized cortical spheroid parameters unless the experiment explicitly compares protocols[1][4][6].
• Form EBs from hPSCs, culture them through early aggregation with ROCK inhibitor when specified, transfer aggregates to neural induction conditions, and select aggregates showing neuroepithelial morphology for downstream organoid generation; this workflow is directly described in cerebral organoid and cortical spheroid protocols[1][4][6].
• Embed selected neuroepithelial aggregates in Matrigel when following the Lancaster-style cerebral organoid method, then culture embedded organoids in expansion and differentiation media; published protocols use this step to support polarized neuroepithelial buds and subsequent neural tissue growth[1][2].
• Transfer organoids to long-term 3D culture using static culture, orbital shaking, spinning bioreactors, or mini-bioreactors depending on the protocol; Qian et al. used SpinΩ mini-bioreactors to generate forebrain, midbrain, and hypothalamic organoids, while Giandomenico et al. extended cerebral organoid culture for telencephalic identity and later-stage maturation[3][5].
• For advanced maturation, section cerebral organoids and culture slices at an air-liquid interface when the experimental goal is improved neuronal survival, axon outgrowth, and tract-like projections; this approach was reported to generate diverse nerve tracts and functional output[5][7].
• Assess successful organoid generation by morphology, reproducibility across differentiations, and marker expression for neural progenitors, cortical neurons, astrocytes, and region-specific identities; Yoon et al. reported reliable cortical spheroid generation across hPSC lines, and Qian et al. reported cortical-development features including progenitor-zone organization, neurogenesis, gene expression, and outer radial glia in forebrain organoids[3][6][8].
• Use negative controls lacking primary antibody for immunostaining, compare organoids with undifferentiated hPSCs or earlier differentiation stages when lineage progression is tested, and include multiple organoids and independent differentiations when assessing reproducibility; published organoid studies commonly evaluate organoid-to-organoid and batch-level consistency using imaging, marker quantification, transcriptomic analysis, and functional assays[3][6][8].
Troubleshooting
Problem: Organoids show high variability in regional identity.
• Possible Cause: Unguided cerebral organoids can generate heterogeneous brain-region identities.• Literature-supported Solution: Use region-specific patterning protocols or cortical spheroid protocols when the experimental goal requires defined forebrain or cortical identity[3][4][6].
Problem: Long-term organoids show reduced internal neuronal survival.
• Possible Cause: Thick submerged organoids can be limited by nutrient and oxygen diffusion.• Literature-supported Solution: Use air-liquid interface organoid slice culture when the goal is improved neuronal survival, axon outgrowth, and long-term tract analysis[5][7].
Problem: Large-scale experiments show batch variability.
• Possible Cause: 3D hPSC differentiation can vary across differentiations and cell lines.• Literature-supported Solution: Use standardized cortical spheroid generation and evaluate consistency across independent differentiations using morphology, marker expression, and transcriptomic or functional assays[6][8].
References:
- [1]. Lancaster MA, et al. Generation of cerebral organoids from human pluripotent stem cells. Nat Protoc. 2014;9(10):2329-2340. [Content Brief]
- [2]. Lancaster MA, et al. Cerebral organoids model human brain development and microcephaly. Nature. 2013;501(7467):373-379. [Content Brief]
- [3]. Qian X, Nguyen HN, Song MM, Hadiono C, Ogden SC, Hammack C, Yao B, et al. Brain-region-specific organoids using mini-bioreactors for modeling ZIKV exposure. Cell. 2016;165(5):1238-1254. [Content Brief]
- [4]. Sloan SA, et al. Generation and assembly of human brain region-specific three-dimensional cultures. Nat Protoc. 2018;13(9):2062-2085. [Content Brief]
- [5]. Giandomenico SL, et al. Generation and long-term culture of advanced cerebral organoids for studying later stages of neural development. Nat Protoc. 2021;16(2):579-602. [Content Brief]
- [6]. Pașca AM, Sloan SA, Clarke LE, Tian Y, Makinson CD, Huber N, Kim CH, et al. Functional cortical neurons and astrocytes from human pluripotent stem cells in 3D culture. Nat Methods. 2015;12(7):671-678. [Content Brief]
- [7]. Giandomenico SL, Mierau SB, Gibbons GM, Wenger LMD, Masullo L, Sit T, Sutcliffe M, et al. Cerebral organoids at the air-liquid interface generate diverse nerve tracts with functional output. Nat Neurosci. 2019;22(4):669-679. [Content Brief]
- [8]. Yoon SJ, Elahi LS, Pașca AM, Marton RM, Gordon A, Revah O, Miura Y, et al. Reliability of human cortical organoid generation. Nat Methods. 2019;16(1):75-78. [Content Brief]
LinkedIn
Researchgate
Instagram
X
Facebook
WhatsApp
Reddit
Mail