Journals / Dicle Tıp Dergisi / 2015 / Cilt: 42 - Sayı: 3

Association of hypoxia inducible factor 1 (HIF-1) and paraoxonase enzyme in lung cancer cell lines

Akciğer kanseri hücre dizilerinde hipoksi indüklenebilir faktör-1 (HIF-1) ve paraoksonaz enzim ilişkisinin araştırılması

Pages
361–367
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The relationship between hypoxia and inflammation and oxidative status of cells requires further studies

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Objective: In this study, it was aimed to investigate that PON2, in hypoxia and normoxia in relation to HIF-1α tran- scription factor that has a role in tumour angiogenesis.
📊
Key Findings & Data:Hypoxia inducible factor 1 alpha (HIF-1α) is a transcrip- tion factor which is sensitive to hypoxia, causes initiation of angiogenesis and metastasis by providing transcription of numerous genes.
💡
Conclusion & Impact:The relationship between hypoxia and inflammation and oxidative status of cells requires further studies
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: In this study, it was aimed to investigate that PON2, in hypoxia and normoxia in relation to HIF-1α tran- scription factor that has a role in tumour angiogenesis. Hypoxia inducible factor 1 alpha (HIF-1α) is a transcrip- tion factor which is sensitive to hypoxia, causes initiation of angiogenesis and metastasis by providing transcription of numerous genes. As well as hypoxia several inflamma- tory agents such as lipopolysaccharide (LPS) can regu- late the expression of HIF-1α as well as PON2. Oxida- tive stress is known to have role in cancer. Paraoxonase 2 which is one of the members of paraoxonase family serves as intracellular anti-oxidant. Methods: H1299, A549 ve PC14 non-small cell lung carcinoma cell lines used in this study. Cells were cul- tured under hypoxia and normoxia conditions with LPS stimulation. HIF-1α and PON2 mRNA expression levels measured by real-time PCR. Western blot studies were performed for protein expression. Results: In this study, it was observed that LPS treatment stimulates HIF-1α expression which increases PON2 ex- pression in NSCLC cell line in under hxpoxia conditions. Conclusion: This study shows that PON2 is regulated by HIF-1α in hypoxia and inflammation. The relationship between hypoxia and inflammation and oxidative status of cells requires further studies

Özet

Amaç: Bu çalışmada tümör anjiyogenezinde önemli rol oynayan hipoksi indüklenebilir faktör 1 (HIF-1) transkripsi- yon faktörünün hipoksik ve normoksik koşullarda paraok- sonaz 2 (PON2) ile ilişkisinin araştırılması hedeflenmiştir. Hipoksiye duyarlı bir transkripsiyon faktör olan HIF-1α çok sayıda genin transkripsiyonunu sağlayarak anjiyoge- nez ve metastazın başlamasına yol açar. Hipoksinin yanı sıra lipopolisakkarit (LPS) gibi çeşitli inflamatuvar ajanlar da HIF-1 α’nın ve PON2 nin ekspresyonunu düzenleyebi- lirler. Oksidatif stres karsinogenezde önemli etiyolojik fak- törlerden birisidir. Paraoksonaz ailesi üyelerinden paraok- sonaz 2 (PON2) nin hücre içi antioksidan olarak görev yaptığı bilinmektedir. Yöntemler: H1299, A549 ve PC14 akciğer hücre dizileri normoksi ve hipoksi ortamlarında kültürü yapılarak ve li- popolisakkaritle indüklenerek HIF-1 ve PON2 mRNA eks- presyonları ve western blot tayinleri çalışılmıştır. Bulgular: Çalışma sonucunda LPS uygulamasının HIF- 1α ekspresyonunu uyardığı ve hipoksi koşullarında akci- ğer hücre dizilerinde PON2 ekspresyonunun arttığı göz- lendi. Sonuç: Bu çalışmada PON 2 enzim ekspresyonunun HIF-1α aracılığıyla hipoksi ve normoksi koşullarında re- güle edildiği gözlenmiş olup hipoksi, inflamasyon ve hüc- renin oksidatif durumu arasındaki ilişkinin aydınlatılması için ileri çalışmalar gerekebilir.

🔖

Cite This Article

KARAGENÇ, N., MEYDANCI, D., KÜÇÜKSAYAN, H. (2015). Association of hypoxia inducible factor 1 (HIF-1) and paraoxonase enzyme in lung cancer cell lines. Dicle Tıp Dergisi, Cilt: 42 - Sayı: 3, 361–367. https://ajindex.com/articles/213068

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (15)

  1. Lou JJ, Chua YL, Chew EH, et al. Inhibition of hypoxia- inducible factor-1alpha (HIF-1alpha) protein synthesis by DNA damage inducing agents. PLoS One 2010;5: e10522
  2. Maxwell PH, Pugh CW, Ratcliffe PJ. Activation of the HIF pathway in cancer. Curr Opin Genet Dev 2001;11:293-299
  3. Kim J-W Tchernyshyov I, Semenza GL, Dang CV. HIF- 1-mediated expression of pyruvate dehydrogenase kinase: a metabolic switch required for cellular adaptation to hy- poxia. Cell Metab 2006;3:177-185
  4. Tracy K, Dibling BC, Spike BT, et al. BNIP3 is an RB/E2F target gene required for hypoxia-induced autophagy. Mol Cell Biol 2007;27:6229-6242
  5. Liu L, Ning X, Sun L, Zhang H, et al. Hypoxia-inducible factor-1α contributes to hypoxia-induced chemoresistance in gastric cancer. Cancer Sci 2008;99:121-128
  6. Airley RE, Mobasheri A. Hypoxic regulation of glucose transport, anaerobic metabolism and angiogenesis in can- cer: novel pathways and targets for anticancer therapeutics. Chemotherapy 2007;53:233-256
  7. Metzen E, Zhou J, Jelkmann W, et al. Nitric oxide impairs normoxic degradation of HIF-1α by inhibition of prolyl hy- droxylases. Mol Biol Cell 2003;14:3470-3481
  8. El Awad B, Kreft B, Wolber EM, et al. Hypoxia and interleukin-1β stimulate vascular endothelial growth fac- tor production in human proximal tubular cells. Kidney Int 2000;58:43-50
  9. Peyssonaux C, Johnson RS. An unexpected role for hy- poxic response: oxygenation and inflammation. Cell Cycle 2004;3:168-171
  10. Sang N, Stiehl DP, Bohensky J, Caro J. MAPK signaling up-regulates the activity of hypoxia-inducible factors by its effects on p300. J Biol Chem 2003;278:14013-14019
  11. Van der Bruggen T, Nijenhuis S, van Raaij E, Verhoef J, Sweder van Asbeck, B. Lipopolysaccharide-induced tumor necrosis factor α production by human monocytes involves the Raf-1/MEK1-MEK2/ERK1-ERK2 pathway. Infect Im- mun 1999;67, 3824-3829
  12. Agani FHP, Pichiule JC, Chavez, LaManna JC. The role of mitochondria in the regulation of hypoxia-inducible factor 1 expression during hypoxia. J Biol Chem 2000:275:35863- 35867
  13. Chandel NS, McClintock DS, Feliciano CE, et al. Reac- tive oxygen species generated at mitochondrial complex III stabilize hypoxia-inducible factor-1alpha during hypoxia: a mechanism of O2 sensing. J Biol Chem 2000:275:25130- 25138
  14. Guzy RD, Hoyos B, Robin E, et al. Mitochondrial com- plex III is required for hypoxia-induced ROS production and cellular oxygen sensing. Cell Metab 2005;1:401-408
  15. Callapina