Journal: Frontiers in Cell and Developmental Biology
Article Title: miR-514a promotes neuronal development in human iPSC-derived neurons
doi: 10.3389/fcell.2023.1096463
Figure Lengend Snippet: Blocking miR-514a using its sponges causes inhibition of neuronal development in iPSC-derived neurons. Neurons were infected with lentiviruses expressing miR-514a-5p sponge, miR-514a-3p sponge or scrambled shRNA as control and cultured for 7 days. (A) Diagrams of lentiviral vector constructs expressing sponges against miR-514a-5p and miR-514a-3p. The sponges were expressed under the U6 RNA polymerase Ⅲ promotor, and EGFP is expressed under the CMV promotor. (B) Representative images of iPSC-derived neurons (201B7) stained with anti-MAP2 (blue) antibody at 7 DIV. Scale bars, 50 µm. (C) Representative images of iPSC-derived neurons (201B7) stained with anti-MAP2 (blue) antibody at 7 DIV. Scale bars, 25 µm. (D) Representative images of iPSC-derived neurons (201B7) stained with anti-pS6 (red) antibody and Hoechst 33,258 (magenta) at 7 DIV. Scale bars, 100 µm. (E) Quantitative analysis of total dendrite length. n = 3 independent experiments, at least 100 neurons were analyzed in each experiment. (F) Quantitative analysis of neuronal soma size. n = 3 independent experiments, at least 100 neurons were analyzed in each experiment. (G) Quantitative analysis of pS6 positive cells. n = 3 independent experiments, at least 200 cells were analyzed in each experiment. n = 3 independent experiments. *** p < 0.001, ** p < 0.01, * p < 0.05. Abbreviations: CMV, cytomegalovirus; EGFP, enhanced green fluorescent protein; MAP2, microtubule-associated protein 2; pS6, phospho-S6 ribosomal protein; n. s., not significant.
Article Snippet: The following primary antibodies were used for immunocytochemistry: monoclonal mouse antibody β-III tubulin (Tuj-1) (1:1,000; Sigma), polyclonal guinea pig antibody microtubule-associated protein 2 (MAP2) (1:1,000; Synaptic Systems, Goettingen, Germany) and polyclonal rabbit antibody phospho-S6 ribosomal protein (pS6) Ser 235/236 (1:1,000; Cell Signaling Technology, Danvers, MA, United States).
Techniques: Blocking Assay, Inhibition, Derivative Assay, Infection, Expressing, shRNA, Control, Cell Culture, Plasmid Preparation, Construct, Staining