Lipopolysaccharide (LPS) induces tissue damage. (A) Diagram of the construct used to generate the apoptosis reporter line where a secreted AnnexinV tagged with a YFP protein is driven by the β-actin promoter. (B,C) Tg (β-actin:secANV-YFP) were injected with PBS or LPS. Representative images (B) and quantification (C) of the YFP-positive foci in trunks at indicated time points post injection. (D–G) WT zebra fish larvae were injected with PBS or LPS. Representative images (D) and quantification (E) of terminal deoxynucleotidyl transferase-mediated dUTP-biotin Nick End Labeling (TUNEL)-positive cells in the trunk at 24 hours post injection (hpi). Representative images (F) and quantification (G) of the Acridine Orange (AO)-positive cells in the trunk at 24 hpi Scale bar: 100 µm. Results are presented as mean ± SEM (n = 3 independent experiments with over 20 larvae each/experiment). *p < 0.05, ****p < 0.0001, Mann–Whitney test. (B,D,F) Images representative of three independent experiments were shown (n = 20). (H,I) Transcript levels of genes encoding vascular and cell junction proteins in whole larvae injected with either PBS or LPS at 8 hpi (H) and 24 hpi (I). Results were normalized with ef1α and are presented as means ± SD (D) (n = 3 biological repeats with 20 larvae in each group). **p < 0.01, ***p < 0.001, ****p < 0.0001, Sidak’s multiple comparisons test.
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