Alteration of Apurinic/Apyrimidinic Endonuclease-1/Redox Factor-1 in Human Non-small Cell Lung Cancer / 대한흉부외과학회지
The Korean Journal of Thoracic and Cardiovascular Surgery
;
: 529-535, 2007.
Article
in Korean
| WPRIM
| ID: wpr-114126
ABSTRACT
BACKGROUND:
An imbalance between oxidants and antioxidants leads to oxidative stress, and this has been proposed to play an important role in the pathogenesis of lung neoplasm. Apurinic/apyrimidinic endonuclease-1/redox factor-1 (APE/ref-1) is a multifunctional protein involved in DNA base excision repair and the redox regulation of many transcription factors. However, the alteration of the expressed levels of APE/ref-1 in non-small cell lung cancer is unknown. MATERIAL ANDMETHOD:
Forty-nine patients with surgically resected non-small cell lung cancer (NSCLC) were included in this study. Immunohistochemical staining with APE/ref-1 antibodies was performed, and their expressions were analyzed via Western blotting for specific antibodies.RESULT:
APE/ref-1 was localized at the nucleus and mainly in the non-tumor region of the NSCLC tissue specimens; it was expressed in the cytoplasm and nucleus of the NSCLC. The nuclear and cytoplasmic expressions of APE/ref-1 in lung cancers were markedly up-regulated in the NSCLC, and this was correlated with the clinical stage. Catalase, as first-line antioxidant defense, was dramatically decreased in the NSCLC.CONCLUSION:
Taken together, our results suggest that APE/ref-1, and especially cytoplasmic APE/ref-1, was upregulated in the lung cancer regions, and this may contribute to the compensatory defense system against oxidative stress. A low expression of catalase might have fundamental effects on the extracellular redox state of lung tumors, along with the potential consequences for the tumors.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Oxidation-Reduction
/
Transcription Factors
/
DNA
/
Catalase
/
Blotting, Western
/
Oxidants
/
Carcinoma, Non-Small-Cell Lung
/
Oxidative Stress
/
Cytoplasm
/
DNA Repair
Limits:
Humans
Language:
Korean
Journal:
The Korean Journal of Thoracic and Cardiovascular Surgery
Year:
2007
Type:
Article
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