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Updated: May 22, 2026
Detection of Functional Matrix Metalloproteinases by Zymography
Published on: November 8, 2010
Detection and comparison of matrix metalloproteinase in primary and recurrent pterygium fibroblasts
Mei-Xia An1, Kai-Li Wu, Shao-Chun Lin
1Department of Ophthalmolgy, the Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, Guangdong Province, China.
Aim:
To detect and compare the levels of matrix metalloproteinases (MMPs) secreted by primary and recurrent human pterygium fibroblasts (HPFs).
Methods:
Primary and recurrent HPFs as well as human conjunctival fibroblasts (HCF) were cultured in RPMI 1640 medium at the same conditions. The protein levels of MMP-1, MMP-3 and MMP-9 were determined by enzyme-linked immune sorbent assay (ELISA), respectively.
Results:
1) The protein level of MMP-1 in serum-free supernatant from cultured primary and recurrent HPFs was higher than that in normal HCFs (P<0.05); similarly, the protein level of MMP-1 in serum-free supernatant from cultured primary HPFs was higher than that in recurrent HCFs (P<0.05). 2) The protein level of MMP-3 in serum-free supernatant from cultured primary HPFs was higher than that in normal HCFs (P<0.05); meanwhile, the protein level of MMP-3 in serum-free supernatant from cultured recurrent HPFs was lower when compared with that in primary HPFs and normal HCFs (P<0.05). 3) MMP-9 was not detected in primary and recurrent HPFs in the conditioned medium.
Conclusion:
The protein levels of MMP-1 and MMP-3 in supernatant secreted by primary HPFs are different from recurrent HPFs. Different pathological mechanisms may exist between primary and recurrent pterygia.
Insights
Matrix metalloproteinases (MMPs) like MMP-1 and MMP-3 show different secretion levels in primary versus recurrent human pterygium fibroblasts (HPFs), suggesting distinct disease mechanisms.
Area of Science:
- Ophthalmology
- Cell Biology
- Biochemistry
Background:
- Pterygium is a common ocular surface disease.
- Recurrence after surgery is frequent and poorly understood.
- Matrix metalloproteinases (MMPs) play roles in tissue remodeling and inflammation.
Purpose of the Study:
- To investigate and compare the secretion levels of specific MMPs by primary and recurrent human pterygium fibroblasts (HPFs).
- To elucidate potential differences in MMP expression that may contribute to pterygium recurrence.
Main Methods:
- Primary and recurrent HPFs, along with normal human conjunctival fibroblasts (HCF), were cultured under identical conditions.
- Enzyme-linked immune sorbent assay (ELISA) was used to quantify protein levels of MMP-1, MMP-3, and MMP-9 in cell culture supernatants.
Main Results:
- MMP-1 levels were significantly elevated in both primary and recurrent HPFs compared to normal HCFs.
- Primary HPFs exhibited higher MMP-1 levels than recurrent HPFs.
- MMP-3 levels were higher in primary HPFs than normal HCFs, but lower in recurrent HPFs compared to both primary HPFs and normal HCFs.
- MMP-9 was undetectable in all tested HPF cultures.
Conclusions:
- Distinct protein levels of MMP-1 and MMP-3 are secreted by primary and recurrent HPFs.
- These findings suggest that different underlying pathological mechanisms may be involved in primary and recurrent pterygia.
- Further research into MMP roles could inform strategies to prevent pterygium recurrence.
