Abstract
To determine the effect of latanoprost on the expression of human matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) in the ciliary body. Total RNA was isolated, and qualitative RT-PCR was performed to detect the mRNA of MMPs and TIMPs in human ciliary body tissue and explant cultures of ciliary body smooth muscle (CBSM) cells. CBSM cell cultures were treated with vehicle control or latanoprost acid for 24 hours. Quantitative RT-PCR of cell cultures from five different donors was performed to determine relative changes in expression. GAPDH served as an endogenous control. The mRNA of MMP-1, -2, -3, -11, -12, -14, -15, -16, -17, -19, and -24 as well as TIMP-1 to -4 were found in ciliary body tissue and CBSM cells. MMP-9 was present after latanoprost treatment. In control CBSM cells, the relative expression of MMP mRNA was MMP-2 and -14 > MMP-24 > MMP-1, -11, -15, -16, and -19 > MMP-3 and 17, > MMP-12. The relative expression of TIMP mRNA was TIMP-2 > TIMP-1 > TIMP-3 > TIMP-4. Latanoprost increased MMP-3 (in three of five cultures), MMP-17 (in four of five cultures), and TIMP-3 (in all five cultures); MMP-1, -2, -12, -14, -15, and -16 and TIMP-4 were downregulated. The transcription of the genes ...Continue Reading
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