Synergistic effect of electric pulses and bleomycin on cultured rabbit subconjunctival fibroblasts

Yuji Oshima, Taiji Sakamoto, Yoh Ichi Kawano, Yasuaki Hata, Hiroshi Yoshikawa, Koh Hei Sonoda, Tatsuro Ishibashi, Hajime Inomata

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Background: The combined effect of electric pulses (EP) and antiproliferative agents on the proliferation of rabbit Tenon's capsule fibroblasts was investigated. Methods. Rabbit Tenon's capsule fibroblasts were cultured. Some of these cells were exposed to various intensities of EP alone (500-2500 V/cm). Other cells were then exposed for 30 min to an antiproliferative agent: bleomycin (BLM; 0.0005-50 μmol/l), mitomycin C (MMC; 0.0005-50 μmol/l), 5-fluorouracil (5-FU; 0.05-5000 μmol/l), or streptomycin (SM; 0.0005-50 μmol/l) with or without EP (2000 V/cm, 99 μs, eight pulses). Cell proliferation was assessed by cell counting on day 3 and by a 3H-thymidine uptake assay. DNA fragmentation was assessed by flow-cytometric analysis and agarose gel electrophoresis. Results: A significant reduction in the cell number was observed only at 2500 V/cm (P < 0.05). BLM, MMC and 5-FU treatment inhibited cell proliferation in a dose-dependent manner either with or without EP (ID50: BLM alone, 0.029 μmol/l; BLM and EP, 0.00022 μmol/l; MMC alone, 41.6 μmol/l; MMC and EP, 27.5 μmol/l; 5-FU alone, 1045 μmol/l; 5-FU and EP, 690.2 μmol/l; P < 0.05). EP treatment induced an inhibitory effect of BLM on cell proliferation which was 100 times more prominent than BLM alone (0.0005 μmol/l of BLM alone 103.4 ± 4.4%, 0.0005 μmol/l of BLM and EP 26.0 ± 4.4%; P = 0.021). BLM treatment with EP also augmented the apoptotic-like DNA fragmentation in both a flow-cytometric DNA histogram and agarose gel electrophoresis. Conclusion: EP treatment enhanced the inhibitory effect of BLM on the cell proliferation of Tenon's capsule fibroblasts of rabbits. The combination of electric pulses and antiproliferative drug treatments may therefore reduce the necessary dose of antiproliferative agents in filtering surgery.

Original languageEnglish
Pages (from-to)52-60
Number of pages9
JournalGraefe's Archive for Clinical and Experimental Ophthalmology
Volume236
Issue number1
DOIs
Publication statusPublished - Jan 1 1998

Fingerprint

Bleomycin
Fluorouracil
Tenon Capsule
Fibroblasts
Rabbits
Cell Proliferation
Agar Gel Electrophoresis
DNA Fragmentation
Filtering Surgery
Mitomycin
Streptomycin
Thymidine
Cell Count
DNA
Pharmaceutical Preparations

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Synergistic effect of electric pulses and bleomycin on cultured rabbit subconjunctival fibroblasts. / Oshima, Yuji; Sakamoto, Taiji; Kawano, Yoh Ichi; Hata, Yasuaki; Yoshikawa, Hiroshi; Sonoda, Koh Hei; Ishibashi, Tatsuro; Inomata, Hajime.

In: Graefe's Archive for Clinical and Experimental Ophthalmology, Vol. 236, No. 1, 01.01.1998, p. 52-60.

Research output: Contribution to journalArticle

Oshima, Yuji ; Sakamoto, Taiji ; Kawano, Yoh Ichi ; Hata, Yasuaki ; Yoshikawa, Hiroshi ; Sonoda, Koh Hei ; Ishibashi, Tatsuro ; Inomata, Hajime. / Synergistic effect of electric pulses and bleomycin on cultured rabbit subconjunctival fibroblasts. In: Graefe's Archive for Clinical and Experimental Ophthalmology. 1998 ; Vol. 236, No. 1. pp. 52-60.
@article{7e82cf142074477088eb58ca0ed65949,
title = "Synergistic effect of electric pulses and bleomycin on cultured rabbit subconjunctival fibroblasts",
abstract = "Background: The combined effect of electric pulses (EP) and antiproliferative agents on the proliferation of rabbit Tenon's capsule fibroblasts was investigated. Methods. Rabbit Tenon's capsule fibroblasts were cultured. Some of these cells were exposed to various intensities of EP alone (500-2500 V/cm). Other cells were then exposed for 30 min to an antiproliferative agent: bleomycin (BLM; 0.0005-50 μmol/l), mitomycin C (MMC; 0.0005-50 μmol/l), 5-fluorouracil (5-FU; 0.05-5000 μmol/l), or streptomycin (SM; 0.0005-50 μmol/l) with or without EP (2000 V/cm, 99 μs, eight pulses). Cell proliferation was assessed by cell counting on day 3 and by a 3H-thymidine uptake assay. DNA fragmentation was assessed by flow-cytometric analysis and agarose gel electrophoresis. Results: A significant reduction in the cell number was observed only at 2500 V/cm (P < 0.05). BLM, MMC and 5-FU treatment inhibited cell proliferation in a dose-dependent manner either with or without EP (ID50: BLM alone, 0.029 μmol/l; BLM and EP, 0.00022 μmol/l; MMC alone, 41.6 μmol/l; MMC and EP, 27.5 μmol/l; 5-FU alone, 1045 μmol/l; 5-FU and EP, 690.2 μmol/l; P < 0.05). EP treatment induced an inhibitory effect of BLM on cell proliferation which was 100 times more prominent than BLM alone (0.0005 μmol/l of BLM alone 103.4 ± 4.4{\%}, 0.0005 μmol/l of BLM and EP 26.0 ± 4.4{\%}; P = 0.021). BLM treatment with EP also augmented the apoptotic-like DNA fragmentation in both a flow-cytometric DNA histogram and agarose gel electrophoresis. Conclusion: EP treatment enhanced the inhibitory effect of BLM on the cell proliferation of Tenon's capsule fibroblasts of rabbits. The combination of electric pulses and antiproliferative drug treatments may therefore reduce the necessary dose of antiproliferative agents in filtering surgery.",
author = "Yuji Oshima and Taiji Sakamoto and Kawano, {Yoh Ichi} and Yasuaki Hata and Hiroshi Yoshikawa and Sonoda, {Koh Hei} and Tatsuro Ishibashi and Hajime Inomata",
year = "1998",
month = "1",
day = "1",
doi = "10.1007/s004170050042",
language = "English",
volume = "236",
pages = "52--60",
journal = "Albrecht von Graefes Archiv für Klinische und Experimentelle Ophthalmologie",
issn = "0065-6100",
publisher = "Springer Verlag",
number = "1",

}

TY - JOUR

T1 - Synergistic effect of electric pulses and bleomycin on cultured rabbit subconjunctival fibroblasts

AU - Oshima, Yuji

AU - Sakamoto, Taiji

AU - Kawano, Yoh Ichi

AU - Hata, Yasuaki

AU - Yoshikawa, Hiroshi

AU - Sonoda, Koh Hei

AU - Ishibashi, Tatsuro

AU - Inomata, Hajime

PY - 1998/1/1

Y1 - 1998/1/1

N2 - Background: The combined effect of electric pulses (EP) and antiproliferative agents on the proliferation of rabbit Tenon's capsule fibroblasts was investigated. Methods. Rabbit Tenon's capsule fibroblasts were cultured. Some of these cells were exposed to various intensities of EP alone (500-2500 V/cm). Other cells were then exposed for 30 min to an antiproliferative agent: bleomycin (BLM; 0.0005-50 μmol/l), mitomycin C (MMC; 0.0005-50 μmol/l), 5-fluorouracil (5-FU; 0.05-5000 μmol/l), or streptomycin (SM; 0.0005-50 μmol/l) with or without EP (2000 V/cm, 99 μs, eight pulses). Cell proliferation was assessed by cell counting on day 3 and by a 3H-thymidine uptake assay. DNA fragmentation was assessed by flow-cytometric analysis and agarose gel electrophoresis. Results: A significant reduction in the cell number was observed only at 2500 V/cm (P < 0.05). BLM, MMC and 5-FU treatment inhibited cell proliferation in a dose-dependent manner either with or without EP (ID50: BLM alone, 0.029 μmol/l; BLM and EP, 0.00022 μmol/l; MMC alone, 41.6 μmol/l; MMC and EP, 27.5 μmol/l; 5-FU alone, 1045 μmol/l; 5-FU and EP, 690.2 μmol/l; P < 0.05). EP treatment induced an inhibitory effect of BLM on cell proliferation which was 100 times more prominent than BLM alone (0.0005 μmol/l of BLM alone 103.4 ± 4.4%, 0.0005 μmol/l of BLM and EP 26.0 ± 4.4%; P = 0.021). BLM treatment with EP also augmented the apoptotic-like DNA fragmentation in both a flow-cytometric DNA histogram and agarose gel electrophoresis. Conclusion: EP treatment enhanced the inhibitory effect of BLM on the cell proliferation of Tenon's capsule fibroblasts of rabbits. The combination of electric pulses and antiproliferative drug treatments may therefore reduce the necessary dose of antiproliferative agents in filtering surgery.

AB - Background: The combined effect of electric pulses (EP) and antiproliferative agents on the proliferation of rabbit Tenon's capsule fibroblasts was investigated. Methods. Rabbit Tenon's capsule fibroblasts were cultured. Some of these cells were exposed to various intensities of EP alone (500-2500 V/cm). Other cells were then exposed for 30 min to an antiproliferative agent: bleomycin (BLM; 0.0005-50 μmol/l), mitomycin C (MMC; 0.0005-50 μmol/l), 5-fluorouracil (5-FU; 0.05-5000 μmol/l), or streptomycin (SM; 0.0005-50 μmol/l) with or without EP (2000 V/cm, 99 μs, eight pulses). Cell proliferation was assessed by cell counting on day 3 and by a 3H-thymidine uptake assay. DNA fragmentation was assessed by flow-cytometric analysis and agarose gel electrophoresis. Results: A significant reduction in the cell number was observed only at 2500 V/cm (P < 0.05). BLM, MMC and 5-FU treatment inhibited cell proliferation in a dose-dependent manner either with or without EP (ID50: BLM alone, 0.029 μmol/l; BLM and EP, 0.00022 μmol/l; MMC alone, 41.6 μmol/l; MMC and EP, 27.5 μmol/l; 5-FU alone, 1045 μmol/l; 5-FU and EP, 690.2 μmol/l; P < 0.05). EP treatment induced an inhibitory effect of BLM on cell proliferation which was 100 times more prominent than BLM alone (0.0005 μmol/l of BLM alone 103.4 ± 4.4%, 0.0005 μmol/l of BLM and EP 26.0 ± 4.4%; P = 0.021). BLM treatment with EP also augmented the apoptotic-like DNA fragmentation in both a flow-cytometric DNA histogram and agarose gel electrophoresis. Conclusion: EP treatment enhanced the inhibitory effect of BLM on the cell proliferation of Tenon's capsule fibroblasts of rabbits. The combination of electric pulses and antiproliferative drug treatments may therefore reduce the necessary dose of antiproliferative agents in filtering surgery.

UR - http://www.scopus.com/inward/record.url?scp=0031938273&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031938273&partnerID=8YFLogxK

U2 - 10.1007/s004170050042

DO - 10.1007/s004170050042

M3 - Article

C2 - 9457517

AN - SCOPUS:0031938273

VL - 236

SP - 52

EP - 60

JO - Albrecht von Graefes Archiv für Klinische und Experimentelle Ophthalmologie

JF - Albrecht von Graefes Archiv für Klinische und Experimentelle Ophthalmologie

SN - 0065-6100

IS - 1

ER -