Collagen Remodeling in the Hypoxic Tumor-Mesothelial Niche Promotes Ovarian Cancer Metastasis.
Suchitra NatarajanKaitlyn M ForemanMichaela I SorianoNinna S RossenHussein ShehadeDaniel R FregosoJoshua T EggoldVenkatesh KrishnanOliver DorigoAdam J KriegSarah C HeilshornSubarna SinhaKatherine C FuhErinn B RankinPublished in: Cancer research (2019)
Peritoneal metastases are the leading cause of morbidity and mortality in high-grade serous ovarian cancer (HGSOC). Accumulating evidence suggests that mesothelial cells are an important component of the metastatic microenvironment in HGSOC. However, the mechanisms by which mesothelial cells promote metastasis are unclear. Here, we report that the HGSOC tumor-mesothelial niche was hypoxic, and hypoxic signaling enhanced collagen I deposition by mesothelial cells. Specifically, hypoxic signaling increased expression of lysyl oxidase (LOX) in mesothelial and ovarian cancer cells to promote collagen crosslinking and tumor cell invasion. The mesothelial niche was enriched with fibrillar collagen in human and murine omental metastases. Pharmacologic inhibition of LOX reduced tumor burden and collagen remodeling in murine omental metastases. These findings highlight an important role for hypoxia and mesothelial cells in the modification of the extracellular matrix and tumor invasion in HGSOC. SIGNIFICANCE: This study identifies HIF/LOX signaling as a potential therapeutic target to inhibit collagen remodeling and tumor progression in HGSOC.Graphical Abstract: http://cancerres.aacrjournals.org/content/canres/79/9/2271/F1.large.jpg.
Keyphrases
- induced apoptosis
- high grade
- cell cycle arrest
- high glucose
- endothelial cells
- extracellular matrix
- small cell lung cancer
- poor prognosis
- squamous cell carcinoma
- endoplasmic reticulum stress
- stem cells
- tissue engineering
- signaling pathway
- gene expression
- cell proliferation
- low grade
- risk assessment
- long non coding rna
- pi k akt
- human health
- low density lipoprotein