Effect of brief exposure to mitomycin C on viability and proliferation of cultured human Tenon's capsule fibroblasts

Research output: Contribution to journalArticle

Abstract

Purpose: The purpose of this study is to determine why a single intraoperative dose of mitomycin C (MMC) appears to promote the success of glaucoma filtration surgery. Methods: Human Tenon's capsule fibroblasts were exposed to MMC and 5-fluorouracil (5-FU) in vitro at the concentrations and durations of exposure used clinically. Cell proliferation was assessed by quantification of 3H-thymidine uptake. Cell viability was studied using a sulfarhodamine B cell protein stain and by trypan blue exclusion. Results: Neither MMC (0.4 mg/ml) nor 5-FU (40 mg/ml) were cytocidal. Both 1- and 5- minute exposures to MMC were antiproliferative. A 1-minute exposure to 0.4 mg/ml inhibited 3H-thymidine uptake by 77%. For the 5-minute exposure, 3H- thymidine uptake was inhibited by 50% at 0.06 mg/ml and by 90% at 0.4 mg/ml. For 5-FU, 3H-thymidine uptake was inhibited by 50% at 10 mg/ml and by 64% at 40 mg/ml. Conclusions: Mitomycin C probably does not improve the success of filtration surgery by killing fibroblasts. The ability of a brief exposure to MMC to improve filtration surgery may be due to an almost complete inhibition of proliferation. Alternatively, it may be due to sustained tissue binding, effects on other components of wound healing, such as cell migration and extracellular matrix production, or effects on the vasculature. A 1-minute exposure may be as effective as a 5-minute exposure.

Original languageEnglish (US)
Pages (from-to)1471-1476
Number of pages6
JournalOphthalmology
Volume99
Issue number9
StatePublished - 1992

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Tenon Capsule
Mitomycin
Fibroblasts
Filtering Surgery
Thymidine
Fluorouracil
Trypan Blue
Glaucoma
Wound Healing
Cell Movement
Extracellular Matrix
Cell Survival
B-Lymphocytes
Coloring Agents
Cell Proliferation

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Effect of brief exposure to mitomycin C on viability and proliferation of cultured human Tenon's capsule fibroblasts. / Jampel, Henry D.

In: Ophthalmology, Vol. 99, No. 9, 1992, p. 1471-1476.

Research output: Contribution to journalArticle

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