[The expression of fibrillin 1 in pathologic scars and its significance].

Abstract

OBJECTIVE:

To probe into the mechanism of fibrillin 1 in pathologic scar, by examining the expressions of fibrillin 1 and TGF-beta1 as well as their correlations in the tissues of keloid, hypertrophic scar and normal skin.

METHODS:

The tissues of keloid, hypertrophic scar and normal skin were tested. RT-PCR was used to assess the mRNA expression levels of the aimed genes. The distribution of fibrillin 1 in scars and normal skin was examined by immunohistochemistry staining.

RESULTS:

The mRNA level of fibrillin 1 in keloid (0.802 +/- 0.116) was increased by 218.25% (P < 0.01) than that in normal skin (0.252 +/- 0.067). The expression of the gene in hypertrophic scar (0.628 +/- 0.144) was higher by 149.21% (while, P > 0.05) than that in normal skin. The expression of TGF-beta1 in keloid and hypertrophic scar were more than that in normal skin. The expression of fibrillin 1 was related to that of TGF-beta1 positively (r = 0.820, P < 0.01). Fibrillin 1 protein was stained positively in basic membranes, endothelial cells, fibroblasts and extracellular matrix of skin tissues. In dermal, the protein levels of fibrillin 1 in keloid (0.117 +/- 0.042) was decreased than those in normal skin (0.185 +/- 0.043) and hypertrophic scar (0.181 +/- 0.048), the inhibition rates were 36.76%, 35.36% respectively (both P < 0.01).

CONCLUSIONS:

The expression of fibrillin 1 in keloid was changed and related to the expression of TGF-beta1 positively, which appears that fibrillin 1 was a cicatrix specific gene. Fibrillin 1 might play an important role in the formation of keloid.

• Authors: Fang-Fei Nie, Qi Wang, Ze-Lian Qin
• Journal: Zhonghua zheng xing wai ke za zhi = Zhonghua zhengxing waike zazhi = Chinese journal of plastic surgery (Zhonghua Zheng Xing Wai Ke Za Zhi) Vol. 24 Issue 5 Pg. 339-42 (Sep 2008) ISSN: 1009-4598 [Print] China
• PMID: 19119630 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• FBN1 protein, human
• Fibrillin-1
• Fibrillins
• Microfilament Proteins
• RNA, Messenger
• Transforming Growth Factor beta1

Topics

• Cicatrix, Hypertrophic (metabolism, pathology)
• Fibrillin-1
• Fibrillins
• Humans
• Keloid (metabolism, pathology)
• Microfilament Proteins (metabolism)
• RNA, Messenger (genetics)
• Transforming Growth Factor beta1 (genetics, metabolism)