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Updated: Jun 24, 2025

Isolation, Culture, and Characterization of Primary Dermal Fibroblasts from Human Keloid Tissue
Published on: July 28, 2023
STAT3-induced lncRNA GNAS-AS1 accelerates keloid formation by mediating the miR-196a-5p/CXCL12/STAT3 axis in a
Yun Liu1, Teng-Xiao Ma1, Peng-Fei Fan1
1Department of Plastic and cosmetic Surgery, Hainan General Hospital (Hainan Affifiliated Hospital of Hainan Medical University), Haikou, Hainan, China.
This study reveals a STAT3/GNAS-AS1/miR-196a-5p/CXCL12 feedback loop driving keloid progression by increasing fibroblast proliferation, migration, and extracellular matrix accumulation.
Area of Science:
- Dermatology
- Molecular Biology
- Biochemistry
Background:
- Keloids are pathological scars causing itching and pain.
- GNAS antisense RNA 1 (GNAS-AS1) is upregulated in keloids, but its role is unknown.
Purpose of the Study:
- To elucidate the molecular mechanism of GNAS-AS1 in keloid pathogenesis.
- To investigate the relationship between GNAS-AS1, miR-196a-5p, and CXCL12 in keloid fibroblasts.
Main Methods:
- Quantitative PCR, Western blot, ELISA to measure gene/protein levels.
- Cell counting kit 8 and wound healing assays for fibroblast function.
- Fluorescence in situ hybridization, Pearson correlation, ChIP, and luciferase assays for molecular interactions.
Main Results:
- GNAS-AS1 and CXCL12 were upregulated, miR-196a-5p downregulated in keloid tissues.
- GNAS-AS1 knockdown inhibited keloid fibroblast proliferation, migration, and ECM accumulation.
- A STAT3/GNAS-AS1/miR-196a-5p/CXCL12 feedback loop was identified, promoting keloid progression.
Conclusions:
- The STAT3/GNAS-AS1/miR-196a-5p/CXCL12 pathway is a key driver of keloid fibroblast activity.
- Targeting this pathway may offer new therapeutic strategies for keloid treatment.
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