Genome-wide chromatin accessibility and gene expression profiling during flatfish metamorphosis

Area of Science:

• Developmental Biology
• Genomics
• Evolutionary Biology

Background:

• Metamorphosis is a critical post-embryonic developmental stage in many animals, particularly teleost fishes like flatfish.
• Flatfish metamorphosis involves significant tissue remodeling, including eye migration, organogenesis, and regression, adapting them for benthic lifestyles.

Purpose of the Study:

• To develop a comprehensive molecular resource for studying flatfish metamorphosis.
• To generate a chromatin accessibility atlas and gene expression profiles across key developmental stages.

Main Methods:

• Chromatin accessibility profiling (e.g., ATAC-seq) to identify regulatory regions.
• Gene expression profiling (e.g., RNA-seq) to quantify transcript abundance.
• Analysis of data across four distinct developmental stages from phylotypic to post-metamorphic.

Main Results:

• Identification of 29,019 differentially accessible chromatin regions.
• Discovery of 3,253 differentially expressed genes.
• Characterization of stage-specific regulatory elements and gene expression patterns, confirming data reproducibility.

Conclusions:

• The generated atlas and expression data offer a robust foundation for future research into flatfish metamorphosis.
• This resource will aid in elucidating the regulatory networks governing the complex molecular events during flatfish development.
• The study highlights the utility of multi-omics approaches in understanding complex biological transitions.