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Related Experiment Videos

Trabecular cell division after argon laser trabeculoplasty.

S S Bylsma1, J R Samples, T S Acott

  • 1Department of Ophthalmology, Oregon Health Sciences University, Portland 97201.

Archives of Ophthalmology (Chicago, Ill. : 1960)
|April 1, 1988
PubMed
Summary

Argon laser trabeculoplasty (ALT) stimulates trabecular cell division in glaucoma patients. This cell division, measured by DNA replication, increases significantly after ALT, suggesting a key mechanism for the treatment.

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Area of Science:

  • Ophthalmology
  • Cell Biology

Background:

  • Argon laser trabeculoplasty (ALT) is a treatment for glaucoma.
  • The precise mechanism by which ALT functions remains unclear.

Purpose of the Study:

  • To investigate the hypothesis that ALT's mechanism involves trabecular cell division.
  • To understand the cellular response of the trabecular meshwork to ALT.

Main Methods:

  • Utilized a human corneoscleral explant organ culture system.
  • Employed autoradiographic assessment of tritiated thymidine incorporation into trabecular cell DNA.
  • Confirmed findings with biochemical evaluation of tritiated thymidine incorporation into DNA.

Main Results:

  • Demonstrated a 180% increase in trabecular cell DNA replication within two days post-ALT.

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  • Observed a decline in DNA replication to 70% of control levels when labeling was initiated five days after ALT.
  • Confirmed that ALT induces a change in the rate of trabecular cell division.

    • Conclusions:

    • Argon laser trabeculoplasty influences trabecular cell division.
    • Changes in trabecular cell division represent a biologic response to ALT.
    • This cellular response may contribute to the therapeutic mechanism of ALT in glaucoma treatment.