Dissecting the Emerging Regulatory and Mechanistic Paradigms of Transcribed Conserved Non-Coding Elements in Breast...

Area of Science:

• Genomics
• Cancer Biology
• Molecular Biology

Background:

• Transcribed conserved non-coding elements (TCNEs) regulate gene expression but their role in carcinogenesis is unclear.
• Existing tools for TCNE identification are immature, hindering systematic functional analysis.

Purpose of the Study:

• To develop a pipeline for TCNE identification and functional characterization.
• To investigate TCNEs' role in breast cancer development and regulatory mechanisms.

Main Methods:

• Development of the captureTCNE pipeline for TCNE landscape depiction.
• Application of captureTCNE to a breast cancer cohort (SEU-BRCA).
• Genome-wide analysis of TCNE characteristics, including chromatin signatures and RBP recruitment.

Main Results:

• TCNEs exhibit enhancer-like chromatin signatures and participate in gene regulation and network architecture in breast cancer.
• TCNE transcripts recruit RBPs (e.g., ENOX1, PTBP1), influencing gene expression and splicing.
• RNA G-quadruplex structures on TCNE transcripts mediate RBP recruitment for estrogen response pathways.
• Identification of 21 genes as key components in TCNE-mediated breast cancer regulation.

Conclusions:

• The captureTCNE pipeline provides effective TCNE identification.
• TCNEs play significant roles in breast cancer regulatory networks, offering potential therapeutic targets.
• This study enhances understanding of TCNEs in cancer, paving the way for novel therapeutic strategies.