Cyclooxygenase-2 expression in primary and recurrent pterygium.
Indian J Ophthalmol
;
2008 Jul-Aug; 56(4): 279-83
Article
in English
| IMSEAR
| ID: sea-69912
ABSTRACT
BACKGROUND:
Pterygia are common, benign, fibrovascular, and infiltrative processes of the corneo-conjunctival junction of unknown pathogenesis. Cyclooxygenase-2 (COX-2) mediates the rate-limiting step in arachidonic acid metabolism. Extensive evidence indicates that the COX-2 prostanoid pathway is involved in inflammation. The aim of the study was to document the immunohistochemical expression of COX-2 in primary and recurrent pterygia. MATERIALS ANDMETHODS:
In this study, 21 primary pterygia and 12 recurrent pterygia from subjects undergoing pterygium surgery and six normal corneal-scleral tissue specimens were studied immunohistochemically for COX-2 expression.RESULTS:
COX-2 was expressed in primary pterygia and recurrent pterygia specimens. There was a statistically significant difference in COX-2 expressions in fibroblasts between primary and recurrent pterygium cases ( P = 0.001). There were statistically significant differences in COX-2 expressions in surface epithelium ( P = 0.028) and stromal inflammatory cells ( P =0.000) between control tissues and primary pterygia tissues. We also detected statistically significant differences in COX-2 expressions in surface epithelium ( P =0.000), stromal fibroblasts P =0.000 (stromal fibroblasts and inflammatory cells), vessels ( P = 0.027) and inflammatory cells ( P =0.001) between control tissues and recurrent pterygia tissues.CONCLUSIONS:
This is the first study to document the expression of COX-2 in primary and recurrent pterygia. In our opinion after excision of pterygia, fibroblastic proliferation continues and this contributes to recurrence.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Recurrence
/
Aged, 80 and over
/
Aged
/
Female
/
Humans
/
Male
/
Pterygium
/
Immunoenzyme Techniques
/
Adult
/
Epithelium
Limits:
Aged80
Language:
English
Journal:
Indian J Ophthalmol
Year:
2008
Type:
Article
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