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Related Experiment Videos

Ascorbic acid enhances nitric oxide production in trabecular meshwork cells.

Jae Woo Kim1

  • 1Department of Ophthalmology, Catholic University of Daegu College of Medicine, Daegu, Korea. jwkim@cu.ac.kr

Korean Journal of Ophthalmology : KJO
|October 8, 2005
PubMed
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Ascorbic acid (AA) boosts nitric oxide (NO) production in trabecular meshwork (TM) cells, potentially aiding aqueous humor outflow. AA also protects TM cells from oxidative stress, suggesting a therapeutic role in eye conditions.

Area of Science:

  • Ocular Physiology
  • Cell Biology
  • Biochemistry

Background:

  • Trabecular meshwork (TM) cells are crucial for regulating intraocular pressure via aqueous humor outflow.
  • Nitric oxide (NO) plays a role in modulating TM cell function and aqueous humor dynamics.
  • Oxidative stress is implicated in various ocular pathologies, including glaucoma.

Purpose of the Study:

  • To investigate the effect of ascorbic acid (AA) on nitric oxide (NO) production in human TM cells.
  • To determine if AA influences TM cell viability under oxidative stress conditions.

Main Methods:

  • Primary human TM cells were treated with varying concentrations of L-ascorbic acid (LAA).
  • Cells were co-administered sodium nitroprusside or hydrogen peroxide to induce oxidative stress.

Related Experiment Videos

  • Nitric oxide production was assessed using the Griess assay, and cellular viability was measured by MTT assay.

    • Main Results:

    • L-ascorbic acid significantly enhanced NO production in TM cells in a dose-dependent manner.
    • AA treatment did not adversely affect TM cell viability.
    • AA demonstrated a cytoprotective effect against hydrogen peroxide-induced oxidative stress, improving cell viability.

    Conclusions:

    • Ascorbic acid enhances nitric oxide production in trabecular meshwork cells.
    • AA may play a role in regulating trabecular outflow through NO modulation.
    • The cytoprotective properties of AA suggest its potential therapeutic value in managing oxidative stress-related ocular conditions.