Project description:This project aims to establish the embryonic anole lung as a model for investigating lung development and more general epithelial morphogenesis by generating a set of single-cell RNA-seq (scRNA-seq) data from late-stage embryonic lungs taken from brown anoles (Anolis sagrei). The anole lung, with its simple architecture, provides a novel tool for investigating signaling in a less complex respiratory system than the murine lung, and this data set would be a large advance in making this system more widely known and accesible among developmental biologists.
Project description:For the purpose of facilitating gene annotation, a transcriptome profile of the developing anole eye was used to identify coding and non-coding regions in the Anolis genome. RNA datasets were generated by collecting samples from three subregions of the anole posterior globe (central, temporal, and nasal) which was comprised of nerual retina, retinal pigmented epithelium, choriod, and scleral tissues. A total of five sample replicates were made. Each replicate incorporated pooled tissues collected from three stage 16.5 developing anole embryos.
Project description:The brown anole lizard, Anolis sagrei, is an emerging squamate model for developmental and functional genetic studies. To develop additional tools and resources for mechanistic studies of signaling pathways and cellular processes in A. sagrei, we established an in vitro system. Using this approach, we studied Hedgehog (Hh) signaling, one of the key developmental signaling pathways, which has evolved across the metazoa. We investigated Hh pathway-induced transcriptional changes in two evolutionarily distinct tetrapods: A. sagrei, and M. musculus, to identify the species-specific and evolutionarily shared responses. We report that ~45 % of genes induced as a response to Hh pathway activation in A. sagrei, are shared with M. musculus. To further increase the versatility of A. sagrei as a squamate model system for gene editing and genomic studies, we established and characterized a new immortalized A. sagrei embryonic fibroblast cell line ASEC-1. We performed whole-genome sequencing analysis to annotate the set of polymorphisms within this cell line. We conclude that transcriptome characterization of the ASEC-1 cell line would permit further investigations dissecting the complex biological and evolutionary aspects of Hh signaling.
2023-12-15 | GSE242114 | GEO
Project description:Anolis sagrei (brown anole lizard) genome, rAnoSag2, sequence data
| PRJNA1142154 | ENA
Project description:Anolis sagrei (brown anole lizard) genome, rAnoSag3, sequence data
| PRJNA1142155 | ENA
Project description:Anolis sagrei (brown anole lizard) genome, rAnoSag1, sequence data
Project description:Sex differences in lifespan are widespread across animal taxa, but their causes remain unresolved. Alterations to the epigenome are hypothesized to contribute to vertebrate aging, and DNA methylation-based aging clocks allow for quantitative estimation of biological aging trajectories. Here, we investigate the influence of age, sex, and their interaction on genome-wide DNA methylation patterns in the brown anole (Anolis sagrei), a lizard with pronounced female-biased survival and longevity. We develop a series of age predictor models and find that, contrary to our predictions, rates of epigenetic aging were not slower in female lizards. However, methylation states at loci acquiring age-associated changes appear to be more “youthful” in young females, suggesting that female DNA methylomes are preemptively fortified in early life in opposition to the direction of age-related drift. Collectively, our findings provide insights into epigenetic aging in reptiles and suggest that early-life epigenetic profiles may be more informative than rates of change over time for predicting sex biases in longevity.