cat no | io1095
Human iPSC-derived oligodendrocyte-like cells expressing Cas9
Flow cytometry analysis reveals high knockout efficiency of beta-2 microglobulin (B2M) by lentiviral transduction
Flow cytometry analysis of B2M protein expression in CRISPRko-Ready ioOligodendrocyte-like cells after delivery of a guide RNA (gRNA) targeting B2M. gRNAs were introduced into the cells at day 2 post-thaw using lentiviral transduction and gene knockout was assessed 6 days post guide delivery. B2M was selected as a proof-of-concept target because it is widely expressed in the cells.
(A) Lentiviral transduction on day 2 with gRNA targeting B2M; approximately 52% of cells received a B2M gRNA, as measured by GFP expression.
(B) Functionality of Cas9 upon B2M gRNA delivery is confirmed, as demonstrated by the histograms showing loss of B2M protein expression in 95% of cells (orange) compared to the cells that received a non-targeting (NT) gRNA (grey); cells gated on the GFP+ population.
Go from seeding to knockout to readout in days
CRISPRko-Ready ioOligodendrocyte-like cells express typical oligodendroglial-specific markers
Immunofluorescent staining of the cells at day 1 (upper panel) and day 8 (lower panel) post-revival. Marker expression is highly similar between CRISPRko-Ready and wild-type ioOligodendrocyte-like cells. At day 1, the cells are positive for the oligodendrocyte-specific marker O4 (red), and the DAPI counterstain (blue). At day 8, cells show an increased complexity and are positive for O4 (red), the myelin basic protein (MBP) (green), and the DAPI counterstain (blue). Scale bar: 100 μm.
Whole transcriptome analysis demonstrates equivalent expression profiles between CRISPRko-Ready and wild-type ioOligodendrocyte-like cells
Bulk RNA-sequencing analysis was performed on CRISPRko-Ready and wild-type ioOligodendrocyte-like cells at day 1 and day 8. Principal component analysis (PCA) represents the variance in gene expression between the CRISPRko-Ready and wild-type ioOligodendrocyte-like cells. Differential expression analysis reveals no statistically significant differentially expressed (DE) genes between the two products, based on a log fold change threshold of 0.5 and an s-value cutoff of 0.01.
This analysis shows clustering of both products, demonstrating equivalent expression profiles at each given timepoint. Colours represent different samples; shapes represent different timepoints; n=3 replicates.
Expression levels for specific genes of interest can be requested by contacting our team at technical@bit.bio.
Key oligodendroglial genes are expressed by CRISPRko-Ready and wild-type ioOligodendrocyte-like cells
Gene expression analysis demonstrates that CRISPRko-Ready ioOligodendrocyte-like cells (CRISPRko-Ready) and wild-type ioOligodendrocyte-like cells (wild-type) have similar marker expression at two timepoints.
Following deterministic programming, the cells downregulate expression of the pluripotency genes OCT4, whilst demonstrating robust expression of relevant oligodendroglial markers, including PDGFRA, PLP1, MBP, and MAG. Gene expression levels assessed by RT-qPCR, data expressed relative to the reference (housekeeping) gene, HMBS. Data represents day 1 and day 8 post-thaw samples; cDNA samples of the parental human iPSC line (iPSC) were included as reference; n=3 technical replicates.
Cells rapidly mature, transitioning into an oligodendrocyte-like morphology within 8 days
A maximum number of 20 vials applies. If you would like to order more than 20 vials, please contact us at orders@bit.bio.
CRISPRko–Ready ioOligodendrocyte-like cells are deterministically programmed using opti‑ox™ technology to resemble a pre-myelinating oligodendrocyte state.
Constitutively expressing Cas9 nuclease, the cells are ready for guide RNA (gRNA) delivery from day 2 post-thaw. Using our optimised lentivirus gRNA delivery protocol, scientists can perform gene knockouts, pooled or arrayed CRISPR screens and start measuring readouts within a few days.
These ready-to-use O4⁺ cells remove the need to engineer Cas9-stable iPSC lines or optimise differentiation protocols, significantly reducing experimental timelines and allowing for reliable and reproducible experimental results by simply introducing gRNAs targeting the gene of interest.
These cells are a powerful tool for functional genomics, drug target identification and translational research for neurodegenerative and demyelinating diseases, such as multiple sclerosis.
High knockout efficiency
Optimised protocol for lentivirus-based guide RNA delivery ensures maximal knockout efficiency.
Defined
Human O4+ cells constitutively expressing Cas9, initially display a typical OPC-like morphology, and mature towards oligodendrocyte-like cells that have multiple branched processes.
Quick
Cells are ready from day 2 post-thaw for gRNA delivery and rapidly mature into O4+ MBP+ oligodendrocyte-like cells.
CRISPRko-Ready ioOligodendrocyte-like cells are delivered in a cryopreserved format and are programmed to rapidly mature upon revival in the recommended media. The protocol for the generation of these cells is a two-phase process: Induction which is carried out at bit.bio, Stabilisation for 1 day (Phase 1), and Maturation from day 1 to day 8 (Phase 2). Lentiviral gRNA delivery is recommended on day 2 post-thaw, and experimental readouts can be assessed by day 8 (day 6 post-gRNA delivery).
Starting material
Human iPSC line
Karyotype
46, XY*
Seeding compatibility
6, 12 and 24 well plates
Shipping info
Dry ice
Donor
Caucasian adult male (skin fibroblast),
Genotype APOE 3/4
Vial size
Small: >1 x 10⁶ viable cells, Evaluation pack**: 3 small vials of >1 x 10⁶ viable cells
Quality control
Sterility, protein expression (ICC), gene expression (RT-qPCR) and Cas9 functional validation (flow cytometry)
Differentiation method
opti-ox deterministic cell programming
Recommended seeding density
27,000 cells/cm²
User storage
LN2 or -150°C
Format
Cryopreserved cells
Product use
ioCells are for research use only
Applications
Single gene knockouts
Combinatorial gene knockouts
Pooled CRISPR screens
Arrayed CRISPR screens
High throughput screening
*High-resolution Optical Genome Mapping (OGM) has identified a ∼35mb gain of the short arm of chromosome 12
** Evaluation packs are intended for first-time users, or for existing users testing a new cell type or derivative. A user can request multiple evaluation packs as long as each one is for a different product, with only one pack allowed per product.
Flow cytometry analysis reveals high knockout efficiency of beta-2 microglobulin (B2M) by lentiviral transduction
Flow cytometry analysis of B2M protein expression in CRISPRko-Ready ioOligodendrocyte-like cells after delivery of a guide RNA (gRNA) targeting B2M. gRNAs were introduced into the cells at day 2 post-thaw using lentiviral transduction and gene knockout was assessed 6 days post-guide delivery. B2M was selected as a proof-of-concept target because it is widely expressed in the cells.
(A) Lentiviral transduction on day 2 with gRNA targeting B2M; approximately 52% of cells received a B2M gRNA, as measured by GFP expression.
(B) Functionality of Cas9 upon B2M gRNA delivery is confirmed, as demonstrated by the histograms showing loss of B2M protein expression in 95% of cells (orange) compared to the cells that received a non-targeting (NT) gRNA (grey); cells gated on the GFP+ population.
CRISPRko-Ready ioOligodendrocyte-like cells express typical oligodendroglial-specific markers
Immunofluorescent staining of the cells at day 1 (upper panel) and day 8 (lower panel) post-revival. Marker expression is highly similar between CRISPRko-Ready and wild-type ioOligodendrocyte-like cells. At day 1, the cells are positive for the oligodendrocyte-specific marker O4 (red), and the DAPI counterstain (blue). At day 8, cells show an increased complexity and are positive for O4 (red), the myelin basic protein (MBP) (green), and the DAPI counterstain (blue). Scale bar: 100 μm.
Cells rapidly mature, transitioning into an oligodendrocyte-like morphology within 8 days
Upon deterministic programming, cells show rapid morphological changes, acquiring an OPC-like morphology by day 1 post-revival. By day 8, cells have matured and display an oligodendrocyte-like morphology. Morphology changes are highly similar between CRISPRko-Ready and wild-type ioOligodendrocyte-like cells. Brightfield images show day 1 and day 8 post-thawing; scale bar: 100 μm.
Key oligodendroglial genes are expressed by CRISPRko-Ready and wild-type ioOligodendrocyte-like cells
Gene expression analysis demonstrates that CRISPRko-Ready ioOligodendrocyte-like cells (CRISPRko-Ready) and wild-type ioOligodendrocyte-like cells (wild-type) have similar marker expression at two timepoints.
Following deterministic programming, the cells downregulate expression of the pluripotency genes OCT4, whilst demonstrating robust expression of relevant oligodendroglial markers, including PDGFRA, PLP1, MBP, and MAG. Gene expression levels assessed by RT-qPCR, data expressed relative to the reference (housekeeping) gene, HMBS. Data represents day 1 and day 8 post-thaw samples; cDNA samples of the parental human iPSC line (iPSC) were included as reference; n=3 technical replicates.
Whole transcriptome analysis demonstrates equivalent expression profiles between CRISPRko-Ready and wild-type ioOligodendrocyte-like cells
Bulk RNA-sequencing analysis was performed on CRISPRko-Ready and wild-type ioOligodendrocyte-like cells at day 1 and day 8. Principal component analysis (PCA) represents the variance in gene expression between the CRISPRko-Ready and wild-type ioOligodendrocyte-like cells. Differential expression analysis reveals no statistically significant differentially expressed (DE) genes between the two products, based on a log fold change threshold of 0.5 and an s-value cutoff of 0.01.
This analysis shows clustering of both products, demonstrating equivalent expression profiles at each given timepoint. Colours represent different samples; shapes represent different timepoints; n=3 replicates.
Expression levels for specific genes of interest can be requested by contacting our team at technical@bit.bio.
V2
bit.bio
2024
Mark Kotter | CEO and founder | bit.bio
Marius Wernig | Professor Departments of Pathology and Chemical and Systems Biology | Stanford University
Madeleine Garrett | Field Application Specialist | bit.bio
Dr Matthias Pawlowski | Head, Dementia-Sensitive Hospital | University of Münster
Dr Malathi Raman | Senior Product Manager | bit.bio
Dr Alex Davenport | Senior Scientist | bit.bio
Talk at ELRIG Cell & Gene Therapy
2021
Running CRISPR screens can be resource-intensive and require a lot of expertise and preparation. Contact us today to arrange a consultation with our screening experts.
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