HIF-1α overexpression enhances tumor angiogenesis via upregulation of vascular endothelial growth factor (VEGF) and some other hypoxia-inducible angiogenic factors, which lead to a more aggressive tumor phenotype, tumor metastasis and resistance to radiation and chemotherapy.
Hypoxia-inducible factor-1α (HIF-1α), a key mediator in tumor metastasis and angiogenesis, is associated with poor patient prognosis and has been recognized as an important cancer drug target.
Hypoxia inducible factor-1α (HIF-1α) is known to regulate the expression of many chemokines, including interleukin-8 (IL-8), which is associated with tumor metastasis.
Cells were also transduced with dual luciferase-based reporter systems to monitor HIF-1 activity and the development of metastases by bioluminescence imaging, using HRE-sensitive and constitutive promoters, respectively.
Downregulation of hypoxia-inducible factor-1α (HIF-1α) with CRISPR/Cas9 is a promising approach to modulate tumor microenvironment and inhibit tumor metastasis.
Expression levels of hypoxia-inducible factor-1α, a well-known regulator of tumor metastasis, as well as its downstream targets, vascular endothelial growth factor and glucose transporter-1, were also suppressed by TAS2Rs.
Expression of hypoxia-associated proteins was in most cases identical between primary tumours and lymph node metastases.Two cases showed strong uniform expression of CAIX and HIF1α in the primary tumour as well as in the lymph node metastases, and sequencing revealed mutations in the coding regions of the Von-Hippel–Lindau gene (VHL ).Our findings suggest that despite of the fact that MTCs have only slowly growth, tumour hypoxia plays an important role in the development of loco-regional metastases.
High PGK1 expression was associated with poor prognosis in breast cancer, because PGK1 and HIF-1α formed a positive feed-forward loop and thus stimulated breast cancer progression and metastases.
However, it suggests that the therapeutic and prognostic implication of somatic VHL alteration may be different according to the mutational subtype and that the Pro582Ser change in HIF-1alpha may contribute to the development of metastases.
Hypoxia Inducible Factor-1 (HIF-1) is an important transcription factor that stimulates tumour growth and metastases via several pathways, including angiogenesis and altered metabolism.
Hypoxia-inducible factor 1 (HIF-1) is a transcription factor that regulates gene expression in critical pathways involved in tumor growth and metastases.
Hypoxia-inducible factor-1 (HIF-1) as a key mediator in tumor metastasis, angiogenesis, and poor patient prognosis has been recognized as an important cancer drug target.
Hypoxia-inducible factor-1alpha (HIF-1alpha) is overexpressed in many human tumors and their metastases, and is closely associated with a more aggressive tumor phenotype.
In addition, hypoxia-inducible factor-1α (HIF-1α) has been demonstrated to be associated with tumor metastasis by regulating epithelial-mesenchymal transition (EMT).