Cyclooxygenase-2-expressing macrophages in human pterygium co-express vascular endothelial growth factor

Choul Yong Park, Jong Sun Choi, Sung Jun Lee, Sang Won Hwang, Eo Jin Kim, Roy S. Chuck

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Purpose: To evaluate cyclooxygenase-2 (COX-2) expression and to characterize COX-2-expressing stromal cells in human pterygium. Methods: Primary pterygium tissue of Korean patients (eight males and nine females) was analyzed. The clinical characteristics were classified, and immunohistochemical staining using primary antibodies against cyclooxygenease-2, vascular endothelial growth factor-A, cluster of differentiation (CD)68, CD3, CD20, and leukocyte common antigen was performed. Results: COX-2 expression was detected in all pterygium tissues evaluated (17 primary pterygia). Diffuse expression of COX-2 in the epithelial layer was observed in nine samples. Infiltration of strongly positive COX-2 cells into the epithelial layer was a more common observation than diffuse epithelial COX-2 expression. Scattered COX-2-expressing cells in the stromal layer were found in all samples. Some COX-2-positive cells were found within microvessels. In addition to stromal COX-2-expressing cells, a few vascular endothelial cells strongly expressed COX-2; however most of the vessels were negative for COX-2 expression. Stromal COX-2-expressing cells were positive for the macrophage marker CD68 and co-expressed vascular endothelial growth factor. COX-2 expression in normal conjunctiva was not observed in seven control samples. Conclusions: These COX-2- and vascular endothelial growth factor-expressing macrophages may have relevance to the pathogenesis of pterygium.

Original languageEnglish (US)
Pages (from-to)3468-3480
Number of pages13
JournalMolecular Vision
Volume17
StatePublished - Dec 29 2011

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Pterygium
Cyclooxygenase 2
Vascular Endothelial Growth Factor A
Macrophages
Stromal Cells
CD45 Antigens
Conjunctiva
Microvessels

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Cyclooxygenase-2-expressing macrophages in human pterygium co-express vascular endothelial growth factor. / Park, Choul Yong; Choi, Jong Sun; Lee, Sung Jun; Hwang, Sang Won; Kim, Eo Jin; Chuck, Roy S.

In: Molecular Vision, Vol. 17, 29.12.2011, p. 3468-3480.

Research output: Contribution to journalArticle

Park, Choul Yong ; Choi, Jong Sun ; Lee, Sung Jun ; Hwang, Sang Won ; Kim, Eo Jin ; Chuck, Roy S. / Cyclooxygenase-2-expressing macrophages in human pterygium co-express vascular endothelial growth factor. In: Molecular Vision. 2011 ; Vol. 17. pp. 3468-3480.
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AU - Chuck, Roy S.

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N2 - Purpose: To evaluate cyclooxygenase-2 (COX-2) expression and to characterize COX-2-expressing stromal cells in human pterygium. Methods: Primary pterygium tissue of Korean patients (eight males and nine females) was analyzed. The clinical characteristics were classified, and immunohistochemical staining using primary antibodies against cyclooxygenease-2, vascular endothelial growth factor-A, cluster of differentiation (CD)68, CD3, CD20, and leukocyte common antigen was performed. Results: COX-2 expression was detected in all pterygium tissues evaluated (17 primary pterygia). Diffuse expression of COX-2 in the epithelial layer was observed in nine samples. Infiltration of strongly positive COX-2 cells into the epithelial layer was a more common observation than diffuse epithelial COX-2 expression. Scattered COX-2-expressing cells in the stromal layer were found in all samples. Some COX-2-positive cells were found within microvessels. In addition to stromal COX-2-expressing cells, a few vascular endothelial cells strongly expressed COX-2; however most of the vessels were negative for COX-2 expression. Stromal COX-2-expressing cells were positive for the macrophage marker CD68 and co-expressed vascular endothelial growth factor. COX-2 expression in normal conjunctiva was not observed in seven control samples. Conclusions: These COX-2- and vascular endothelial growth factor-expressing macrophages may have relevance to the pathogenesis of pterygium.

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