Deciphering the Retinal Epigenome during Development, Disease and Reprogramming: Advancements, Challenges and...

Area of Science:

• Neuroscience
• Epigenetics
• Developmental Biology

Background:

• Retinal neurogenesis involves complex transcription factor interactions and chromatin landscape dynamics.
• Epigenetic mechanisms are crucial for retinal cell fate acquisition, stabilization, and are implicated in age-related macular degeneration.

Purpose of the Study:

• To review state-of-the-art approaches for investigating the retinal epigenome during development, disease, and reprogramming.
• To present a pipeline for functional interrogation of epigenetic and transcriptional networks in cell fate specification.
• To identify novel master regulators of retinal cell identity.

Main Methods:

• Unbiased screening of open chromatin states.
• Inferential modeling for gene regulatory network identification.
• Footprinting analysis and systematic query of candidate pioneer factors in the retina.
• Review of next-generation sequencing and super-resolution imaging techniques.

Main Results:

• Identification of previously uncharacterized master regulators of retinal cell identity, including Nuclear Factor I (NFI).
• Development of a pipeline applicable to studying genetic programs and pioneer factors in any developmental context.
• Discussion of challenges and advances in epigenomic investigation techniques.

Conclusions:

• Understanding retinal epigenomic mechanisms offers potential therapeutic strategies for retinal degeneration.
• The identified pipeline and master regulators advance the study of cell fate specification.
• Advances in imaging and sequencing enhance spatio-temporal resolution of genomic studies.