ArticleInvestigative ophthalmology & visual science2025
Mechano- and Glucocorticoid-Sensitive TREK-1 Channels Regulate Conventional Outflow and Intraocular Pressure.
Article in Investigative ophthalmology & visual science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- TRPV4 regulates intraocular pressure through trabecular meshwork contractility and fibrosis.Channels (Austin, Tex.) · 2026Review
Corrections and comments
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Authors and funding
10 authors.
Funding
Abstract
Purpose: The purpose of this study was twofold: to determine the molecular link between corticosteroid exposure and mechanosensation and to establish the role of mechanosensitive TWIK-related potassium channel-1 (TREK-1) in the regulation of aqueous humor outflow and corticosteroid-induced ocular hypertension (OHT). Methods: Real-time PCR was used to determine the corticosteroid dexamethasone (DEX) dependence of expression of tandem-pore potassium (K2P), transient receptor potential vanilloid (TRPV), Piezo channel, extracellular matrix (ECM), and fibrotic marker genes in mouse trabecular meshwork (mTM) cells. Immunohistochemistry was employed to assess TREK-1 localization, iPerfusion to determine the TREK-1 dependence of conventional outflow, and tonometry to track intraocular pressure (IOP) in mouse eyes. Telemetry additionally tested TREK-1 dependence of OHT in rat. Steroid-induced transcriptional suppression of mTM Kcnk2 was validated by whole-cell recording in primary human trabecular meshwork (TM) cells. Results: The tandem pore K+ channel transcriptome in mTM cells was dominated by Trek-1 (Kcnk2) mRNA; with residual levels of Traak and Thik-2 transcripts; and low levels of Trek-2, Twik3, and Task1 expression. DEX upregulated Fsp1 and suppressed Kcnk2 expression without affecting Trpv4, Piezo1, or Trpc1 mRNA content. The TREK-1 agonist ML-402 doubled outflow facility in mouse eyes and reduced IOP in the mouse model of DEX-induced OHT and in rat eyes with spontaneously elevated IOP. Chronic DEX exposure depolarized human primary TM (pTM) cells and reduced the amplitude of the ML-402-evoked current. Conclusions: Ocular overexposure to corticosteroids may compromise IOP homeostasis by impairing TM expression and function of TREK-1. Pharmacological activation of TREK-1 facilitates conventional outflow and could help lower IOP in eyes with steroid-induced ocular hypertension.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.