Oct4 inducer-1

Whole-cell patch-clamp recording in acute brain slices measures membrane current from visually identified neurons while preserving part of the local synaptic circuit; in voltage clamp, postsynaptic currents are generated by synaptic receptor-channel activation and are recorded as inward or outward currents at a defined holding potential. Miniature synaptic currents are recorded during action-potential blockade with tetrodotoxin, whereas evoked synaptic currents are generated by pathway stimulation and isolated pharmacologically as EPSCs or IPSCs.

Human iPSC reprogramming converts somatic cells into pluripotent cells by introducing defined transcription factors; classic human studies used OCT3/4, SOX2, KLF4, and c-MYC, or OCT4, SOX2, NANOG, and LIN28, and judged reprogramming by embryonic-stem-cell-like morphology, pluripotency-marker expression, normal karyotype, and differentiation into derivatives of the three germ layers. This protocol is framed around non-integrating reprogramming culture, with Sendai virus, episomal plasmids, or synthetic modified mRNA as literature-supported delivery options; Sendai virus is an RNA vector reported to avoid host-genome integration, episomal vectors can generate integration-free human iPSCs, and modified mRNA can reprogram human cells while avoiding genomic modification.

CRISPR-Cas9 editing of human pluripotent stem cells uses a guide RNA to direct Cas9 to a genomic target, where Cas9 creates a double-strand break that is repaired mainly by non-homologous end joining for knockout mutations or by homology-directed repair when a donor template is supplied for precise knock-in or sequence correction. The readout is generated by genotyping edited bulk populations or single-cell-derived clones, using PCR, sequencing, restriction-based assays, reporter fluorescence, or allele-specific analysis to distinguish unedited alleles, indels, precise donor-mediated edits, biallelic deletions, and unwanted on-target lesions.