Project description:The zebrafish runzel (ruz) carries a mutation in the titin gene resulting in muscle degeneration and embryonic lethality. At the onset of the visible phenotype (3-3.5 days post fertilization), RNA expression of the tail and trunk (primarily skeletal muscle) was compared between ruz mutants and wildtype siblings using the Affymetrix Zebrafish Gene Chip. Mutant RNA was matched with RNA of wildtype siblings from the same clutch. 3 separate clutches were used (n=3). RNA was labeled, sheered, and hybridized as in Shephard et al. (Shepard et al., 2005) and the data analyzed as in Choe et al. and Weber et al. (Choe et al., 2005; Weber et al., 2005). Results suggest a novel mechanism of titin muscular dystrophy pathogenesis including upregulation of heat shock proteins. Keywords: disease state analysis
Project description:Nr5a2 (also known as liver receptor homolog-1, Lrh-1) has been shown to bind both the proximal enhancer and proximal promoter regions of Pou5f1 and regulate Pou5f1 in the epiblast stage of mouse embryonic development (Gu et al., 2005). Nr5a2-null embryos display a loss of Oct4 expression in the epiblasts (Gu et al., 2005) and die between E6.5 and E7.5 (Gu et al., 2005; Pare et al., 2004). To identify the targets of Nr5a2, we generated a stable ES cell-line that expresses HA-tagged Nr5a2. Anti-HA antibody was used to immunoprecipitate HA-Nr5a2 for ChIP-seq analysis. Keywords: Transcription factor binding sites
