Figure 1. RT-PCR of normal conjunctiva and pterygium

A: Serial dilutions and densitometric imaging were used to compare the mRNA levels in primary pterygium (PT) and normal conjunctiva (NC). B: Higher mRNA levels of fibronectin, lipocalin, and macrophage inflammatory protein (MIP-4) and lower levels of ephrin-A1 and Per1 were observed in PT compared to NC. No significant difference was observed for chloride intracellular channel 2 (CliC2), carbonic anhydase (CA), or glyceraldehyde-3-phosphate dehydrogenase (GAPDH). C: Comparison with additional tissues showed that fibronectin mRNA levels were highest in PT compared to limbal epithelium (LE), central corneal epithelium (CCE), limbal nonepithelium (LNE), central corneal nonepithelium (CCNE), and normal conjunctiva (NC). Per1 mRNA levels were lower in PT than in LE, CCNE, and NC. Per1 mRNA levels were below the level of detection in CCE and LNE.