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Over-expression of prolyl hydroxylase-1 blocks NF-κB-mediated cyclin D1 expression and proliferation in lung carcinoma cells

Authors
Publisher
Elsevier Inc.
Volume
207
Issue
5
Identifiers
DOI: 10.1016/j.cancergen.2014.04.008
Keywords
  • Phd1
  • Nf-κB
  • Cyclin D1
  • Tumor Growth
Disciplines
  • Medicine

Abstract

Prolyl hydroxylase-1 (PHD1), a member of the hypoxia inducible factor (HIF)-PHD family, plays an important role in regulating the stability of HIFs. The nuclear factor-κB (NF-κB) pathway consists of a family of transcription factors that play critical roles in inflammation, immunity, cell proliferation, differentiation, and survival. In this study, we demonstrate that PHD1 can inhibit NF-κB activity and its target genes in lung cancer cells based on both over-expression and RNA interference-mediated knockdown of PHD1 in human A549 lung cancer cells and HEK293 T cells. Of medical importance, PHD1 could induce cell cycle arrest in lung cancer cells, resulting in the suppression of cell proliferation. Xenograft tumor growth assays indicate that PHD1 plays a critical role in suppressing lung cancer growth. These findings reveal a new role of PHD1 in lung cancer and provide new treatment perspectives for cancer therapy by characterizing PHD1 as a potential target.

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