Method Profile
A hippocampal organoid study combines short valproic-acid exposure with mRNA and miRNA profiling and selected reporter assays.
Characterize transcriptomic responses to valproic acid in a human-cell model relevant to developmental drug-safety research.
Human hippocampal organoids derived from the IMR90-4 iPSC line; day-57 cultures used for exposure.
Expose organoids to 1 mM valproic acid for four days and compare with untreated contemporaneous organoids.
Human hippocampal organoids
Derived from one female-donor iPSC line, IMR90-4.
Valproic acid
1 mM exposure beginning on culture day 57 for four days.
Molecular readouts
mRNA and miRNA sequencing, selected RT-qPCR checks and dual-luciferase reporters in HEK-293T cells.
The authors compared treated and untreated organoids, linked miRNA and mRNA changes with predicted target networks, then tested selected candidate interactions in HEK-293T reporter assays. Sequencing used two biological replicates per group.
Four-day drug exposure versus untreated organoids at one developmental stage.
Organoids from a single iPSC line; two biological sequencing replicates per group.
No-drug organoids; reporter constructs compared with corresponding controls in HEK-293T cells.
Nineteen miRNAs had altered expression, including Novel miR-39 and Novel miR-1052. Reporter effects supported TGFBR3 and GABRB2 for Novel miR-39, and NDEL1 and GPBP1 for Novel miR-1052; HS6ST2 did not show the same response.
Researchers exposed human hippocampal organoids to valproic acid for four days, then profiled mRNA and miRNA. They found 19 altered miRNAs and tested selected target sequences in HEK-293T reporter cells, with limited replication from one iPSC line.
