Abstract
Lung and skin are the organs directly exposed to environmental pollution. Ozone (O3) is a toxic, oxidant air pollutant, and exposure has been shown to induce antioxidant depletion as well as oxidation of lipids and proteins within the outermost skin layer (stratum corneum) and the lung respiratory tract lining fluids (RTLFs). To further define skin and lung responses to O3 exposure, SKH-1 hairless mice were exposed to either 0.8 ppm of O3 (a level occasionally reached in very polluted areas) or ambient air 6 h/day for 6 consecutive days. O3 exposure resulted in the depletion of α-tocopherol in lung and plasma and induction in both skin and lung of heme oxygenase 1, cyclooxygenase 2, and proliferating cell nuclear antigen. O3-exposed animals showed a similar extent of upregulation of COX-2 and PCNA in lung and skin, whereas HO-1 was more responsive in skin than in lung (7-fold induction vs. 2-fold induction). In addition to these measures of response to oxidative stress, O3 exposure led to the activation of nuclear factor κB measured as IκBα phosphorylation in both tissues. We conclude that in this model, O3 at high pollutant levels is able to affect both lung and skin biology, inducing depletion of α-tocopherol and inducing stress-related responses in both skin epidermis and respiratory tract epithelium.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 673-681 |
| Number of pages | 9 |
| Journal | Free Radical Biology and Medicine |
| Volume | 36 |
| Issue number | 5 |
| DOIs | |
| State | Published - Mar 1 2004 |
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Keywords
- Cyclooxygenase 2
- Free radicals
- Heat stress proteins
- Heme oxygenase
- Keratinocytes
- Lipid peroxidation
- Nuclear factor κB
- Ozone
- Proliferating cell nuclear antigen
ASJC Scopus subject areas
- Medicine(all)
- Toxicology
- Clinical Biochemistry
Cite this
In vivo ozone exposure induces antioxidant/stress-related responses in murine lung and skin. / Valacchi, Giuseppe; Pagnin, Elisa; Corbacho, Ana M.; Olano, Estibaliz; Davis, Paul A.; Packer, Lester; Cross, Carroll E.
In: Free Radical Biology and Medicine, Vol. 36, No. 5, 01.03.2004, p. 673-681.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - In vivo ozone exposure induces antioxidant/stress-related responses in murine lung and skin
AU - Valacchi, Giuseppe
AU - Pagnin, Elisa
AU - Corbacho, Ana M.
AU - Olano, Estibaliz
AU - Davis, Paul A.
AU - Packer, Lester
AU - Cross, Carroll E
PY - 2004/3/1
Y1 - 2004/3/1
N2 - Lung and skin are the organs directly exposed to environmental pollution. Ozone (O3) is a toxic, oxidant air pollutant, and exposure has been shown to induce antioxidant depletion as well as oxidation of lipids and proteins within the outermost skin layer (stratum corneum) and the lung respiratory tract lining fluids (RTLFs). To further define skin and lung responses to O3 exposure, SKH-1 hairless mice were exposed to either 0.8 ppm of O3 (a level occasionally reached in very polluted areas) or ambient air 6 h/day for 6 consecutive days. O3 exposure resulted in the depletion of α-tocopherol in lung and plasma and induction in both skin and lung of heme oxygenase 1, cyclooxygenase 2, and proliferating cell nuclear antigen. O3-exposed animals showed a similar extent of upregulation of COX-2 and PCNA in lung and skin, whereas HO-1 was more responsive in skin than in lung (7-fold induction vs. 2-fold induction). In addition to these measures of response to oxidative stress, O3 exposure led to the activation of nuclear factor κB measured as IκBα phosphorylation in both tissues. We conclude that in this model, O3 at high pollutant levels is able to affect both lung and skin biology, inducing depletion of α-tocopherol and inducing stress-related responses in both skin epidermis and respiratory tract epithelium.
AB - Lung and skin are the organs directly exposed to environmental pollution. Ozone (O3) is a toxic, oxidant air pollutant, and exposure has been shown to induce antioxidant depletion as well as oxidation of lipids and proteins within the outermost skin layer (stratum corneum) and the lung respiratory tract lining fluids (RTLFs). To further define skin and lung responses to O3 exposure, SKH-1 hairless mice were exposed to either 0.8 ppm of O3 (a level occasionally reached in very polluted areas) or ambient air 6 h/day for 6 consecutive days. O3 exposure resulted in the depletion of α-tocopherol in lung and plasma and induction in both skin and lung of heme oxygenase 1, cyclooxygenase 2, and proliferating cell nuclear antigen. O3-exposed animals showed a similar extent of upregulation of COX-2 and PCNA in lung and skin, whereas HO-1 was more responsive in skin than in lung (7-fold induction vs. 2-fold induction). In addition to these measures of response to oxidative stress, O3 exposure led to the activation of nuclear factor κB measured as IκBα phosphorylation in both tissues. We conclude that in this model, O3 at high pollutant levels is able to affect both lung and skin biology, inducing depletion of α-tocopherol and inducing stress-related responses in both skin epidermis and respiratory tract epithelium.
KW - Cyclooxygenase 2
KW - Free radicals
KW - Heat stress proteins
KW - Heme oxygenase
KW - Keratinocytes
KW - Lipid peroxidation
KW - Nuclear factor κB
KW - Ozone
KW - Proliferating cell nuclear antigen
UR - http://www.scopus.com/inward/record.url?scp=1242338750&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1242338750&partnerID=8YFLogxK
U2 - 10.1016/j.freeradbiomed.2003.12.005
DO - 10.1016/j.freeradbiomed.2003.12.005
M3 - Article
VL - 36
SP - 673
EP - 681
JO - Free Radical Biology and Medicine
JF - Free Radical Biology and Medicine
SN - 0891-5849
IS - 5
ER -