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Knockout dmem f 12

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KnockOut DMEM/F-12 is a cell culture medium designed for the maintenance and growth of embryonic stem cells and other pluripotent cell lines. It is a serum-free and feeder-free formulation that provides the necessary nutrients and growth factors to support the undifferentiated state of these cell types.

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70 protocols using knockout dmem f 12

1

Cell Culture Media Formulations

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Monocyte Medium: RPMI 1640 (Gibco), 10% FCS (Gibco), 10 mM Hepes (Gibco), 2 mM Glutamax (Gibco), 1% Antibiotic/Antimycotic (Gibco); StemPro Differentiation Medium (SP): KnockOut DMEM/F-12 (Gibco), 2% StemPro Neural Supplement (Gibco), 2 mM Glutamax (Gibco), 1% Antibiotic/Antimycotic (Gibco); OPC Differentiation Medium (OPC Diff): OPC Spontaneous Differentiation Media Kit (Sigma-Aldrich SCM106); OPC Expansion Medium: Human OPC Expansion Culture Media Kit (Sigma-Aldrich SCM107);
Neural Differentiation Medium (NDM): Neurobasal Medium (Gibco), 2% B27 Supplement (Gibco), 2 mM Glutamax (Gibco), 1% Antibiotic/Antimycotic (Gibco); B27 Medium: KnockOut DMEM/F-12 (Gibco), 2% B27 Supplement (Gibco), 2 mM Glutamax (Gibco), 1% Antibiotic/Antimycotic (Gibco); N2 Medium: KnockOut DMEM/F-12 (Gibco), 1% N2 Supplement (Gibco), 2 mM Glutamax (Gibco), 1% Antibiotic/Antimycotic (Gibco); KO DMEM/F-12 Medium: KnockOut DMEM/F-12 (Gibco), 2 mM Glutamax (Gibco); 1% Antibiotic/Antimycotic (Gibco); RPMI 1640 Medium: RPMI 1640 (Gibco), 2 nM Glutamax (Gibco), 1% Antibiotic/Antimycotic (Gibco).
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2

Expansion and Characterization of Human NSCs

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NSCs derived from the human pluripotent stem cell line H9 were purchased from Thermo Fischer Scientific. NSCs were stained with the NSC markers NESTIN, SOX1 and SOX2.
NSCs were washed with cold PBS (without Ca2+ and Mg2+) and dissociated with pre-warmed StemPro Accutasse (Gibco). Cells were washed with passaging medium (KnockOut DMEM/F-12, 2 nM GlutaMAX, 1% Antibiotic/Antimycotic) in a 1:10 ratio, centrifuged at 300×g for 5 min and resuspended in passaging medium. Cells were counted via trypan blue exclusion before plating.
For proliferation, 6-well TC-Treated plastic plates were coated with Geltrex (Gibco), diluted in KnockOut DMEM/F12 (Gibco) with a final concentration of 1:120.
NSCs were proliferated in StemPro Serum Free Proliferation Medium (KnockOut DMEM/F-12, 2% StemPro Supplement, 10 ng/ml EGF, 10 ng/ml FGF2, 2 mM GlutaMAX, and 1% Antibiotic/Antimycotic). Medium was changed every other day until cells reached 100% confluency and were subsequently passaged either for further proliferation or differentiation. Cells used for all experiments came from large batches expanded and frozen at passages (P) 3, 23 and 38 to ensure consistency. Cells were always allowed to proliferate for at least two passages before being used for experiments. Plates were incubated at 37 °C with 5% CO2 in a humidified atmosphere.
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3

Culturing Cortical Neural Stem Cells

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For preparation of cortical neural stem cells [54 (link)], cells were plated into Nunc 90 mm petri dishes, previously coated with Cell Start (Gibco), at a seeding density of 500 x105 cells/ml. Neural stem cells were cultured in StemPro NSC SFM composed of: Knockout D-MEM / F12; Glutamax (2mM); bFGF (20ng/ml); EGF (20ng/ml); StemPro Neural Supplement (2%); all from (Gibco). Under these growth conditions at 7 DIV cells were proliferative and were Nestin and Ki67 positive.
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4

Spontaneous Differentiation of hESCs

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To achieve spontaneous differentiation, hESCs cultured in either WT-Bfgf or TS-Bfgf were harvested using the maintenance protocol and then seeded on AggreWell 400 (Stemcell Technologies, Vancouver, BC, Canada). The AggreWell plates were pretreated according to the manufacturer’s protocol with Anti-Adherence Rinsing Solution (Stemcell Technologies, Canada) and washed twice with 1× PBS without Ca2+ and Mg2+ (Gibco™, USA). The suspended cells were seeded at a density of 2 × 104 cells/cm2 onto each well. After 24 h, embryonic bodies (EB) were gently transferred to a 100-mm petri dish (SPL Life Science, Republic of Korea) using a spontaneous differentiation medium (knockout DMEM/F12 (Gibco™, USA) + 20% FBS without bFGF). EBs were isolated on day 8 for RNA extraction. The medium was changed every two days.
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5

Derivation and Culture of NPCs from iPSCs

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IPSC-derived neural progenitor cells (NPC) were kindly provided by Professor Hongjun Song’s lab within our joint NIH NCATS project (Pamies et al., 2016 (link)). NPCs were derived from C1 (CRL-2097) fibroblasts purchased from ATCC. Differentiation from iPSC to NPC has been previously described (Wen et al., 2014 (link)). NPCs were cultured in poly-lornithine and laminin-coated 175 cm2 flasks in NPC medium (KnockOut DMEM/F12 [Gibco] supplemented with 2% Stempro® [Gibco], 1% Glutamax [Gibco], 1% Pen-strep [Gibco], 20 ng/ml endothelial growth factor [Gibco], and 20 ng/ml basic fibroblast growth factor [Gibco]). Half of the media was exchanged every day. Cultures were maintained at 37 °C in a humidified atmosphere of 5.0% CO2. Passages 17–24 were used for neural differentiation.
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6

Maintenance of Radial Glial and BTIC Lines

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Previously described Radial Glial cell line LC26-10R and BTIC line LC26-RTL(4) (generated from LC26-10R) [29 (link)] were maintained in the exponential growth phase by passaging them every 3 days with growth medium Knockout DMEM/F-12 (Gibco, 12-660012) supplemented with 2% Stempro Neural Suppliment (Gibco, A1050801), 1% Hyclone Antibiotic/Antimycotic (GEHealthcare Life Sciences, SV30079.01SV3007901), 1% Glutamax (Gibco, 35-050-061) and 10 ng/mL bFGF (Sigma, GF003-AF) in laminin (Invitrogen, 23017015) coated 35 mm culture dish in CO2 incubator at 37°C.
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7

Induction of Glial-like Cells from Stem Cells

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GEFs were induced by the BFRTV induction medium, which consists of the Neurobasal Medium (GIBCO), KnockOut DMEM-F12 (GIBCO), KSR (GIBCO), 100× N2 (GIBCO), 50× B27 (GIBCO) supplements, 1% Gluta-MAX (GIBCO), and supplemented with five small-molecule cocktails, 1 μM TTNPB (B),10 μM Forskolin (F), 10 μM RepSox (R), 10 μM tranylcypromine (T), and 500 μg/mL VPA (V). The culture was continued for 8 days, and the induction medium was refreshed every 2 days. More details are provided in the work of Zhang et al. (2021 (link)).
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8

Differentiation of Stem Cells into Germ Layers

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Embryoid body (EB) formation was performed by plating single cells in AggreWell800 (Stem Cell Technologies, 34811, Vancouver, Canada) in medium containing Knockout DMEM F-12 (Gibco,12660-012, Grand Island, NY, USA), 20% Knockout Serum (Gibco, 10828-028, Grand Island, NY, USA), non-essential amino acids-1x (Gibco, 11140-050) and Glutamax-1x (Gibco, 35050-061). Medium was changed 48 hours later and thereafter till day 7 in an every-other-day mode. On day 7, EB spheres were collected and plated onto plates coated with 0.1% Gelatin (Millipore, ES-006-B) and medium containing Dulbecco’s modified Eagle’s medium (DMEM) (Gibco 11965-092), 20% fetal bovine serum (FBS) (Gibco, SH30071), non-essential amino acids-1x (Gibco, 11140-050) and Glutamax-1x (Gibco, 35050-061). Medium was changed every other day for 7 days. On day 7 post plating, EBs were fixed with 4% paraformaldehyde (Santa Cruz, SC-281692, Dallas, TX, USA), and stained for detection of cells of the three germ layers with antibodies for the following antigens: SOX17 (R&D Systems, AF1924, Minneapolis, MN, USA) for endoderm, PAX6 (BioLegend, PRB-278P, San Diego, CA, USA) for ectoderm and SMA (Millipore, CBL171) for mesoderm.
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9

Optimized Trophoblast Differentiation Protocol

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For trophoblast differentiation, we used the method of Xu et al. with slight modifications7 (link). Briefly, differentiation was initiated by switching the medium to KnockOut DMEM/F12 (#12660012, Gibco) containing 2% bovine serum albumin (#A10008-01, Gibco), 2 mM L-glutamine (#G7513, Sigma), 10 µg/ml insulin-transferrin-selenium (#51500056, Gibco), 100 ng/ml heparin sulfate (#GAG-HS01, Iduron), and 0.1 mM non-essential amino acids solution (#11140050, Gibco). After two days, the cells were seeded into Geltrex (#A1413201, Gibco)-coated six-well plates in KnockOut DMEM/F12 containing 100 ng/ml recombinant human BMP4 (#314-BP-010, R&D Systems), 20% KnockOut Serum Replacement (#10828010, Gibco), 0.1 mM non-essential amino acids solution, and 0.1 mM β-mercaptoethanol (#21417-52, Nacalai Tesque). Incubated cells were collected on days 2, 4, 6, and 8.
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10

Cell Culture Protocols for Diverse Cell Types

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293T cells (CRL11268; American Type Culture Collection [ATCC], Rockville, MD) were cultured in DMEM (Invitrogen, Edinburgh, Scotland), supplemented with 10% fetal bovine serum (FBS; Invitrogen). The Jurkat T lymphocyte line (TIB-152) (ATCC, Manassas, VA) was grown in RPMI medium supplemented with 10% FBS and Penicillin-Streptomycin Solution (Biowest). Human neural progenitor cells (Gibco human neural stem cells [NSCs], H9 hESC-derived, cat. no. N7800) were maintained in StemPro NSC serum-free medium (SFM) (KnockOut DMEM/F-12, StemPro NSC SFM supplement, basic FGF recombinant protein, and EGF recombinant protein; Gibco, Thermo Fisher Scientific). Plates were previously coated with poly-L-Ornithine 10 μg/mL (Sigma-Aldrich, St. Louis, MO; https://www.sigmaaldrich.com) and laminin 20 μg/mL (Thermo Fisher Scientific, cat. no. 23017-015). The human iPSC line PBMC1-iPS4F1 were grown as previously described by Montes et al.79 All of the human cells used in this study were donated by healthy individuals after informed consent according to the Institutional Guidelines.
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