Transcriptomic Differences Between Immortalized Oral and Skin Keratinocytes

Area of Science:

• Cell Biology
• Wound Healing Research
• Transcriptomics

Background:

• Oral mucosal wounds heal faster with less scarring than skin wounds.
• Site-specific keratinocyte differences are hypothesized to contribute to this phenomenon.

Purpose of the Study:

• To investigate functional and transcriptional differences between immortalized oral (TIGK) and skin (HaCaT) keratinocytes.
• To identify molecular mechanisms underlying differential wound healing phenotypes.

Main Methods:

• Utilized immortalized HaCaT and TIGK cell lines.
• Generated mRNA-sequencing gene expression datasets at baseline and during in vitro healing.
• Performed gene set enrichment analysis and functional assays.

Main Results:

• TIGK cells showed enhanced migration and proliferation compared to HaCaT cells.
• Transcriptomic analysis revealed differential gene expression, including interferon signaling, integrins, and matrix metalloproteinases (MMPs).
• TIGK cells demonstrated a faster transcriptional response to injury and a secretome that promotes keratinocyte migration.

Conclusions:

• Specific transcriptomic differences between oral and skin keratinocytes contribute to distinct wound healing phenotypes.
• This study provides valuable gene expression data for HaCaT and TIGK cells for future research.