NSD 1034

Cytotoxicity assays are usually based on the assessment of cell membrane damage, which can also be indirectly detected by measuring cell viability. Detection methods include MTT assay, CKK-8 assay, LDH assay and ATP assay, etc.

Human pluripotent stem cells are directed toward midbrain dopaminergic neurons by first inducing a neural floor-plate-like progenitor state, then patterning cells with ventralizing SHH signaling and midbrain/WNT-FGF cues, and finally maturing progenitors into neurons expressing dopaminergic markers such as TH, NURR1/NR4A2, PITX3, DAT/SLC6A3, VMAT2/SLC18A2, GIRK2/KCNJ6, FOXA2, LMX1A, and EN1. The main readouts are loss of pluripotency, acquisition of FOXA2+/LMX1A+ midbrain floor-plate progenitors, emergence of βIII-tubulin+/MAP2+ neurons, and production of TH+ dopaminergic neurons with molecular, dopamine-release, and electrophysiological features of midbrain dopaminergic identity.

Ca²⁺ staining is an experimental technique that utilizes specific fluorescent probes (such as Fluo-4 AM, Fura-2, etc.) to qualitatively or quantitatively detect dynamic changes in intracellular Ca²⁺ concentrations; this is achieved by monitoring the changes in fluorescent signals generated when these probes bind to free intracellular calcium ions. The underlying principle relies primarily on the presence of chelating groups within the probe's molecular structure that possess high affinity for calcium ions.