Transcriptomic Analyses Predict Enhanced Metabolic Activity and Therapeutic Potential of mTOR Inhibitors in...

Area of Science:

• Dermatology
• Molecular Biology
• Genomics

Background:

• Current acne treatments focus on preventing lesions but lack understanding of the underlying molecular changes in acne-prone skin.
• Nonlesional (NL) skin in acne patients (NLA) has poorly understood molecular characteristics that may predispose to lesion development.

Purpose of the Study:

• To compare gene expression profiles of NL skin from acne patients with healthy controls.
• To identify molecular pathways and potential therapeutic compounds that can normalize NLA skin gene expression.

Main Methods:

• RNA sequencing was performed on NL skin samples from 49 acne patients and 19 healthy controls.
• Differential gene expression analysis, gene set enrichment analysis, and connectivity mapping were utilized.
• The Library of Integrated Network-Based Signatures was used to identify potential therapeutic compounds.

Main Results:

• 77 differentially expressed genes were identified in NLA skin, including those related to innate immunity and epidermal barrier function.
• Metabolic pathways were enriched, while keratinization was negatively enriched in NLA skin.
• 187 compounds, notably mTOR inhibitors, were identified as potentially normalizing the gene expression profile of NLA skin.

Conclusions:

• NLA skin displays unique differences in epidermal differentiation, metabolism, and innate immunity, contributing to lesion formation.
• mTOR inhibitors may restore NLA skin towards a healthier state, potentially reversing acne predisposition.
• This research offers insights into the molecular basis of acne-prone skin and suggests novel therapeutic strategies.