Striatal neuron culture media and reagents
Phase contrast images of differentiating striatal neural culture
Validation of key marker expression by immunocytochemistry
ICC images of differentiating striatal neural culture. Cells were fixed and stained on day 10, day 18 and day 33 for markers of striatal neurons (medium spiny neurons): DARPP32, CTIP2, CALBINDIN, GABA and MAP2. Download PDF file showing additional ICC images.
Quantitative real time PCR analyses of key marker expression levels
Lactate Dehydrogenase (LDH) Cytotoxicity Assay
Significant increase in HD Striatal neuron cytotoxicity
Both iPSC-NSCs (ax0015 and ax0211) were seeded at 35,000 cells/cm2 and differentiated to striatal neurons in 96-well plate for 33 days. Cytotoxicity was measured based on LDH (lactate dehydrogenase) release. LDH activity was determined by spectrophotometric absorbance at 490 nm; n=3 (3 wells per condition), along with negative and spontaneous LDH release controls
Kit used: Pierce LDH Cytotoxicity Assay Kit. ThermoFisher Cat. No. 88953
Absorbance normalized to the total protein concentration
The absorbance was normalised to the protein concentration post lysis (protein concentration was determined using Qubit 2). Normalisation did not change the results since the protein concentration of all samples were comparable.
Electrophysiological characterisation using multi-electrode arrays
iPSC-derived NSCs (ax0016) were differentiated to striatal neurons using Axol Striatal Neuron Medium Kit on a 24-well multi-electrode array plate (AlphaMed Scientific Inc.) and spontaneous action potential recordings were carried out and analysed using MED64 Presto system.
Spontaneous field action potential (n=5927)
Average Field Potential Duration: 3.66 ms
Average First Peak Amplitude: -16.69 uV
Average Second Peak Amplitude: 9.05 uV
60 second MEA recording
No. of bursts: 913; Burst rate: 1.52 Hz; Mean IntraBurst Interval: 34.96 ms
Frequency – Spike Rate within bursts: 420 Hz; Inter-Burst Interval (time between bursts): 527 ms
Burst First Peak Amplitude within bursts: -16.07 uV
Burst Second Peak Amplitude within bursts: 9.14 uV
- Instruction Manual: Axol Striatal Neuron Medium Kit
- To be used with Axol iPSC-derived NSCs: ax0015, ax0016, ax0018 and/or ax0211