Abstract
Introduction: Oxidative stress is often implicated in the genesis of injury to living tissues, even though intact cells generally possess sophisticated antioxidant systems. PFOB attenuates oxidative lung injury in vivo, at least in part due to a decrease in free radical release by macrophages. We hypothesized that PFOB would also protect a biological system from direct injury by reactive oxygen species. Methods: Rat pulmonary artery endothelial cells (RPAECs) were grown to confluence on optical grade culture dishes using standard technique. Cells were labeled with a permeable intracellular probe containing dihydrochlorofluorescein-diacetate (DCFH-DA), activated by cytoplasmic esterases. The cells were exposed to PFOB or culture medium for 15 min, after which all PFOB was removed by a transfer pipette. The monolayers were washed with medium prior to introduction of a buffer containing H2O2 to induce oxidative stress. Changes in cell fluorescence were measured in a kinetic fashion using a confocal fluorescence microscope. The digital images were analyzed with dedicated software to measure the amount of oxidative stress experienced by each monolayer. Results: Values are means ± SEM.*p < 0.05 vs baseline, 1 p < 0.05 vs PFOB. Conclusions: PFOB attenuates oxidative injury to cell monolayers. We speculate that due to its high spreading coefficient, PFOB may act as a physical barrier against free radicals originated in the aqueous phase. The lipophilic PFOB could potentially alter cell membrane fluidity and confer some protection even after its removal. Supported, in part, by the American Lung Association- NY Affiliate, and by Alliance Pharmaceutical Corporation.
| Original language | English (US) |
|---|---|
| Journal | Critical Care Medicine |
| Volume | 27 |
| Issue number | 1 SUPPL. |
| State | Published - 1999 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Critical Care and Intensive Care Medicine
Cite this
Perflubron (PFOB) protects cell monolayers against direct in vitro oxidative injury. / Rotta, Alexandre T.; Gunnarsson, Björn; Hernan, Lynn J.; Fuhrman, Bradley P.; Steinhorn, David M.
In: Critical Care Medicine, Vol. 27, No. 1 SUPPL., 1999.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Perflubron (PFOB) protects cell monolayers against direct in vitro oxidative injury
AU - Rotta, Alexandre T.
AU - Gunnarsson, Björn
AU - Hernan, Lynn J.
AU - Fuhrman, Bradley P.
AU - Steinhorn, David M.
PY - 1999
Y1 - 1999
N2 - Introduction: Oxidative stress is often implicated in the genesis of injury to living tissues, even though intact cells generally possess sophisticated antioxidant systems. PFOB attenuates oxidative lung injury in vivo, at least in part due to a decrease in free radical release by macrophages. We hypothesized that PFOB would also protect a biological system from direct injury by reactive oxygen species. Methods: Rat pulmonary artery endothelial cells (RPAECs) were grown to confluence on optical grade culture dishes using standard technique. Cells were labeled with a permeable intracellular probe containing dihydrochlorofluorescein-diacetate (DCFH-DA), activated by cytoplasmic esterases. The cells were exposed to PFOB or culture medium for 15 min, after which all PFOB was removed by a transfer pipette. The monolayers were washed with medium prior to introduction of a buffer containing H2O2 to induce oxidative stress. Changes in cell fluorescence were measured in a kinetic fashion using a confocal fluorescence microscope. The digital images were analyzed with dedicated software to measure the amount of oxidative stress experienced by each monolayer. Results: Values are means ± SEM.*p < 0.05 vs baseline, 1 p < 0.05 vs PFOB. Conclusions: PFOB attenuates oxidative injury to cell monolayers. We speculate that due to its high spreading coefficient, PFOB may act as a physical barrier against free radicals originated in the aqueous phase. The lipophilic PFOB could potentially alter cell membrane fluidity and confer some protection even after its removal. Supported, in part, by the American Lung Association- NY Affiliate, and by Alliance Pharmaceutical Corporation.
AB - Introduction: Oxidative stress is often implicated in the genesis of injury to living tissues, even though intact cells generally possess sophisticated antioxidant systems. PFOB attenuates oxidative lung injury in vivo, at least in part due to a decrease in free radical release by macrophages. We hypothesized that PFOB would also protect a biological system from direct injury by reactive oxygen species. Methods: Rat pulmonary artery endothelial cells (RPAECs) were grown to confluence on optical grade culture dishes using standard technique. Cells were labeled with a permeable intracellular probe containing dihydrochlorofluorescein-diacetate (DCFH-DA), activated by cytoplasmic esterases. The cells were exposed to PFOB or culture medium for 15 min, after which all PFOB was removed by a transfer pipette. The monolayers were washed with medium prior to introduction of a buffer containing H2O2 to induce oxidative stress. Changes in cell fluorescence were measured in a kinetic fashion using a confocal fluorescence microscope. The digital images were analyzed with dedicated software to measure the amount of oxidative stress experienced by each monolayer. Results: Values are means ± SEM.*p < 0.05 vs baseline, 1 p < 0.05 vs PFOB. Conclusions: PFOB attenuates oxidative injury to cell monolayers. We speculate that due to its high spreading coefficient, PFOB may act as a physical barrier against free radicals originated in the aqueous phase. The lipophilic PFOB could potentially alter cell membrane fluidity and confer some protection even after its removal. Supported, in part, by the American Lung Association- NY Affiliate, and by Alliance Pharmaceutical Corporation.
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M3 - Article
AN - SCOPUS:25044481081
VL - 27
JO - Critical Care Medicine
JF - Critical Care Medicine
SN - 0090-3493
IS - 1 SUPPL.
ER -