Downregulation of secreted protein acidic and rich in cysteine in human trabecular meshwork cells
- Yang Fu
- Liying Luo
- Ying Fan
- Min Tang
Affiliations: Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai 200080, P.R. China
- Published online on: August 5, 2021 https://doi.org/10.3892/etm.2021.10560
Copyright: © Fu
et al. This is an open access article distributed under the
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Secreted protein acidic and rich in cysteine (SPARC) may play a notable role in aqueous humor outflow through the trabecular meshwork (TM). SPARC is a potential therapeutic target in glaucoma, and the mechanism by which it regulates intraocular pressure remains unclear. The present study aimed to observe the effects of SPARC in human TM cells (HTMCs) in vitro. SPARC was downregulated by recombinant lentiviral vectors in HTMCs, and the subsequent levels of F‑actin expression, zonula occludens‑1 (ZO‑1) expression and cellular phagocytosis were observed and calculated. It was revealed that after 48 h of culture, the expression levels of SPARC, F‑actin and ZO‑1 were significantly decreased in the lentivirus group compared with those in the blank control and empty vector control groups. The downregulation of SPARC promoted phagocytosis in HTMCs after 24 or 48 h of culture. This indicated that the downregulation of SPARC decreased the expression levels of the cytoskeleton‑associated proteins F‑actin and ZO‑1, promoted phagocytosis in HTMCs and may affect the outflow of aqueous humor via the TM pathway.