Abstract | PURPOSE: Smad7 is a molecule that blocks the Smad2/3 signal. Herein, we examined the effects of Smad7 gene introduction on post-injury conjunctival wound healing in mice. Its effects on the cultured human subconjunctival fibroblasts (SCFs) were also investigated. METHODS: A circumferential incision was made in the equatorial conjunctiva by using scissors in the right eye of fully anesthetized adult C57BL/6 mice (n=72). Smad7 cDNA-expressing adenoviral vector was topically applied. The control eye received nonfunctioning adenoviral vector. After 2, 5, 7, and 30 days the eyes were processed for histological or immunohistochemical examination to evaluate wound healing of conjunctiva. The expressions of type-I collagen and growth factors were evaluated by real time- reverse transcriptase-polymerase chain reaction. The effects of Smad7 gene introduction on the cultured human SCFs were also studied. RESULTS: CONCLUSIONS: Smad7 gene transfer modulates injury-induced wound healing of conjunctival tissue in mice, suggesting that this strategy may be effective in preventing excessive scarring following filtration surgery. The mechanism might include suppression of activation of fibroblasts and reduction of macrophage invasion.
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Authors | Osamu Yamanaka, Kazuo Ikeda, Shizuya Saika, Ken-ichi Miyazaki, Akira Ooshima, Yoshitaka Ohnishi |
Journal | Molecular vision
(Mol Vis)
Vol. 12
Pg. 841-51
(Aug 01 2006)
ISSN: 1090-0535 [Electronic] United States |
PMID | 16902401
(Publication Type: Journal Article)
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Chemical References |
- Actins
- CCN2 protein, human
- CCN2 protein, mouse
- Ccl2 protein, mouse
- Chemokine CCL2
- Collagen Type I
- Immediate-Early Proteins
- Intercellular Signaling Peptides and Proteins
- Luminescent Agents
- RNA, Messenger
- Smad7 Protein
- Vascular Endothelial Growth Factor A
- Connective Tissue Growth Factor
- Green Fluorescent Proteins
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Topics |
- Actins
(antagonists & inhibitors)
- Animals
- Cells, Cultured
- Chemokine CCL2
(genetics)
- Collagen Type I
(genetics)
- Conjunctiva
(cytology, injuries, metabolism, pathology)
- Connective Tissue Growth Factor
- Eye Injuries
(metabolism, physiopathology)
- Fibroblasts
(metabolism)
- Gene Transfer Techniques
- Green Fluorescent Proteins
- Humans
- Immediate-Early Proteins
(genetics)
- Immunohistochemistry
- Intercellular Signaling Peptides and Proteins
(genetics)
- Luminescent Agents
- Mice
- Mice, Inbred C57BL
- Muscle, Smooth
(metabolism)
- RNA, Messenger
(antagonists & inhibitors)
- Smad7 Protein
(genetics, metabolism)
- Vascular Endothelial Growth Factor A
(antagonists & inhibitors, genetics)
- Wound Healing
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