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Fig. 7
Analysis of nebulin knockdown in zebrafish muscle. a Brightfield and fluorescent images of wild-type embryos injected with two different nebulin (neb)-targeting morpholinos (MOs) compared to control uninjected embryos at 2 dpf. Successful injection is confirmed by the presence of Cascade Blue (CB) labeling. b qRT-PCR analysis showing significant knockdown of neb transcript in Neb morphants compared to control uninjected (control) at 2 dpf. Error bars represent ±SEM for three replicate experiments with each experiment comprising a pooled samples of 20 fish, *p < 0.05. c RT-PCR analysis revealed the absence of correctly spliced, and presence of mis-spliced, neb transcript in Neb ex5 morphants compared to control uninjected (cont) and reduced expression of neb transcript in Neb ex 35 morphants at 2 dpf. β-actin was used as an amplification control. d Quantification of sarcomere lengths showed a significant decrease in neb morphants compared to controls at 2 dpf. Error bars represent ± SEM for four replicate experiments (n = 10 per experiment), *p < 0.01. e Actinin2 labeling of Z-disks in morphant and control zebrafish at 2 dpf illustrates the reduced sarcomere length in Nebulin morphants compared to controls over 10 sarcomeres (represented by the distance between the black arrow and red arrows)