Fig. 6: Nlrc3 is downstream of the NF-kB signaling pathway for regulating HSPC emergence.

a Expression of NF-kB genes in control embryos and nlrc3 morphants at 26 hpf by RNA-seq. ns = 0.2176, 0.4498, 0.6039,0.1870, *P = 0.0224, 0.0311, **P = 0.0022, 0.0018, 0.0083, ***P = 0.0002, ****P < 0.0001. b Expression of nlrc3, runx1, and the NF-kB target gene il1b in control embryos, nlrc3 mutants, nlrc3 mutants with ikbaa Mo, and treatment group with ikbaa Mo at 30 hpf by qPCR. **P = 0.0041, 0.0053, ***P = 0.0001, ****P < 0.0001. c, d Expression of the HSPC marker runx1 in control embryos, ikbaa morphants, nlrc3 mutants, and nlrc3 mutants with ikbaa morphants at 28 hpf by WISH (black arrowheads) with quantification (d) ns = 0.3163, 0.9187, ****P < 0.0001, n = 12, 12, 14, 18 embryos. e, f Expression of the HSPC marker cmyb in control embryos, nlrc3 mutants, nlrc3 mutants with overexpression of nlrc3 mRNA, treatment group with NF-kB inhibitor JSH-23, and treatment group with NF-kB inhibitor JSH-23 and overexpression of nlrc3 mRNA at 48 hpf by WISH (black arrowheads) with quantification (f) ****P < 0.0001, n = 12, 21, 20, 11, 13 embryos. g, h Confocal imaging showing the number of CD41+ cells at 72 hpf in the CHT (white arrowheads) of Tg (CD41:GFP) embryos in the control embryos, treatment group with NF-kB inhibitor JSH-23, and treatment group with NF-kB inhibitor JSH-23 and overexpression of nlrc3 mRNA with quantification (h). *P = 0.0387, ****P < 0.0001, n = 17, 19, 16 embryos. i Expression of HSPC genes and NF-kB genes in control embryos, treatment group with NF-kB inhibitor JSH-23, and treatment group with NF-kB inhibitor JSH-23 with overexpression of nlrc3 mRNA at 30 hpf by qPCR. ns = 0.8444, 0.9785, *P = 0.0179, ***P = 0.0005, ****P < 0.0001. Error bars, mean ± s.d., *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001, the exact p-values mentioned above are listed from left to right, by using two-tailed, unpaired Student’s t-test in (a), one-way ANOVA with –Sidak test in (d, f, h), two-way ANOVA with Tukey’s post hoc test in (b, i), n = 3 biological replicates in (a, b, i). For the box plots in (d, f, h), box limits extend from the 25th to 75th percentile, while the middle line represents the median. Whiskers extend to the largest value no further than 1.5 times the IQR from each box hinge. Scale bars, 100 μm in (c, e, g). Source data are provided as a Source Data file.