Effect of Relaxin Expression from an Alginate Gel-Encapsulated Adenovirus on Scar Remodeling in a Pig Model
Yonsei Medical Journal
;
: 854-863, 2019.
Article
in English
| WPRIM
| ID: wpr-762121
ABSTRACT
PURPOSE:
Relaxin (RLX) is a transforming growth factor-β1 (TGF-β1) antagonist that is believed to function as a potent collagen re-arranger and a major suppressor of extracellular matrix components. Adenoviruses (Ads) are accepted vectors for cancer gene therapy. However, repeated treatments of Ad are limited by short-term biological activity in vivo. The efficacy of sustained RLX expression to scar remodeling was assessed using an injectable alginate gel-matrix system. MATERIALS ANDMETHODS:
Pig scar tissue was treated with relaxin-expressing Ad loaded in alginate gel (gel/Ad-RLX). Surface areas, color, and pliability of scars were compared, and various factors influencing scar formation and collagen arrangement were analyzed.RESULTS:
Gel/Ad-RLX decreased scar size, color index, and pliability. Immunohistochemistry showed decreased levels of major extracellular matrix proteins in the gel/Ad-RLX-treated group. Furthermore, treatment with gel/Ad-RLX reduced expression of tissue inhibitor of metalloproteinase-1 and alpha-smooth muscle actin and markedly increased expression of matrix metalloproteinase-1 in pig scar tissues. Gel/Ad-RLX also significantly downregulated TGF-β1 and upregulated TGF-β3 mRNAs in pig scar tissues.CONCLUSION:
These results support a prominent role for RLX in scar remodeling and suggest that gel/Ad-RLX may have therapeutic effects on scar formation.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Relaxin
/
RNA, Messenger
/
Immunohistochemistry
/
Genetic Therapy
/
Adenoviridae
/
Extracellular Matrix Proteins
/
Actins
/
Collagen
/
Cicatrix
/
Pliability
Type of study:
Prognostic study
Language:
English
Journal:
Yonsei Medical Journal
Year:
2019
Type:
Article
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