Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis

James J. Lee, Mitsuteru Natsuizaka, Shinya Ohashi, Gabrielle S. Wong, Munenori Takaoka, Carmen Z. Michaylira, Daniela Budo, John W. Tobias, Michiyuki Kanai, Yasuhiro Shirakawa, Yoshio Naomoto, Andres J P Klein-Szanto, Volker H. Haase, Hiroshi Nakagawa

Research output: Contribution to journalArticle

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Abstract

Hypoxia-inducible factors (HIFs), in particular HIF-1α, have been implicated in tumor biology. However, HIF target genes in the esophageal tumor microenvironment remain elusive. Gene expression profiling was performed upon hypoxia-exposed nontransformed immortalized human esophageal epithelial cells, EPC2-hTERT, and comparing with a gene signature of esophageal squamous cell carcinoma (ESCC). In addition to known HIF-1α target genes such as carbonic anhydrase 9, insulin-like growth factor binding protein-3 (IGFBP3) and cyclooxygenase (COX)-2, prostaglandin E synthase (PTGES) was identified as a novel target gene among the commonly upregulated genes in ESCC as well as the cells exposed to hypoxia. The PTGES induction was augmented upon stabilization of HIF-1α by hypoxia or cobalt chloride under normoxic conditions and suppressed by dominantnegative HIF-1α. Whereas PTGES messenger RNA (mRNA) was negatively regulated by normoxia, PTGES protein remained stable upon reoxygenation. Prostaglandin E2 (PGE2) biosynthesis was documented in transformed human esophageal cells by ectopic expression of PTGES as well as RNA interference directed against PTGES. Moreover, hypoxia stimulated PGE2 production in a HIF-1α-dependent manner. In ESCC, PTGES was overexpressed frequently at the mRNA and protein levels. Finally, COX-2 and PTGES were colocalized in primary tumors along with HIF-1α and IGFBP3. Activation of the COX-2-PTGES axis in primary tumors was further corroborated by concomitant upregulation of interleukin-1β and downregulation of hydroxylprostaglandin dehydrogenase. Thus, PTGES is a novel HIF-1α target gene, involved in prostaglandin E biosynthesis in the esophageal tumor hypoxic microenvironment, and this has implications in diverse tumors types, especially of squamous origin.

Original languageEnglish
Pages (from-to)427-434
Number of pages8
JournalCarcinogenesis
Volume31
Issue number3
DOIs
Publication statusPublished - Mar 2010

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Cyclooxygenase 2
Hypoxia-Inducible Factor 1
Genes
Insulin-Like Growth Factor Binding Protein 3
Tumor Microenvironment
Dinoprostone
Neoplasms
Hypoxia
Prostaglandin-E Synthases
Messenger RNA
Gene Expression Profiling
RNA Interference
Prostaglandins E
Interleukin-1
Oxidoreductases
Proteins
Up-Regulation
Down-Regulation
Epithelial Cells

ASJC Scopus subject areas

  • Cancer Research

Cite this

Lee, J. J., Natsuizaka, M., Ohashi, S., Wong, G. S., Takaoka, M., Michaylira, C. Z., ... Nakagawa, H. (2010). Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis. Carcinogenesis, 31(3), 427-434. https://doi.org/10.1093/carcin/bgp326

Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis. / Lee, James J.; Natsuizaka, Mitsuteru; Ohashi, Shinya; Wong, Gabrielle S.; Takaoka, Munenori; Michaylira, Carmen Z.; Budo, Daniela; Tobias, John W.; Kanai, Michiyuki; Shirakawa, Yasuhiro; Naomoto, Yoshio; Klein-Szanto, Andres J P; Haase, Volker H.; Nakagawa, Hiroshi.

In: Carcinogenesis, Vol. 31, No. 3, 03.2010, p. 427-434.

Research output: Contribution to journalArticle

Lee, JJ, Natsuizaka, M, Ohashi, S, Wong, GS, Takaoka, M, Michaylira, CZ, Budo, D, Tobias, JW, Kanai, M, Shirakawa, Y, Naomoto, Y, Klein-Szanto, AJP, Haase, VH & Nakagawa, H 2010, 'Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis', Carcinogenesis, vol. 31, no. 3, pp. 427-434. https://doi.org/10.1093/carcin/bgp326
Lee JJ, Natsuizaka M, Ohashi S, Wong GS, Takaoka M, Michaylira CZ et al. Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis. Carcinogenesis. 2010 Mar;31(3):427-434. https://doi.org/10.1093/carcin/bgp326
Lee, James J. ; Natsuizaka, Mitsuteru ; Ohashi, Shinya ; Wong, Gabrielle S. ; Takaoka, Munenori ; Michaylira, Carmen Z. ; Budo, Daniela ; Tobias, John W. ; Kanai, Michiyuki ; Shirakawa, Yasuhiro ; Naomoto, Yoshio ; Klein-Szanto, Andres J P ; Haase, Volker H. ; Nakagawa, Hiroshi. / Hypoxia activates the cyclooxygenase-2-prostaglandin E synthase axis. In: Carcinogenesis. 2010 ; Vol. 31, No. 3. pp. 427-434.
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