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MCPIP1 Downregulation in Clear Cell Renal Cell Carcinoma Promotes Vascularization and Metastatic Progression

Paulina Marona1, Judyta Górka1, Zofia Mazurek1

  • 1Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.

Cancer Research
|July 19, 2017
PubMed

Insights

Clear cell renal cell carcinoma (ccRCC) progression involves decreased MCPIP1 protein levels. Lower MCPIP1 correlates with increased tumor growth, vascularity, and metastasis in kidney cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Clear cell renal cell carcinoma (ccRCC) is the most common kidney cancer, characterized by highly vascularized tumors.
  • Monocyte endoribonuclease MCPIP1 regulates inflammation, NFκB/AP1 activity, and miRNA functions.
  • MCPIP1 degrades mRNA for proinflammatory cytokines like IL6, IL1, and IL12.

Purpose of the Study:

  • To investigate the role of MCPIP1 in renal cancer progression.
  • To determine the correlation between MCPIP1 levels and tumor characteristics in ccRCC.
  • To elucidate the mechanisms by which MCPIP1 influences tumor growth, angiogenesis, and metastasis.

Main Methods:

  • Analysis of MCPIP1 protein levels in patient-derived ccRCC tumors and xenografts.
  • Correlation studies between MCPIP1 levels and tumor proliferation, outgrowth, and vascularity.
  • Investigation of MCPIP1's effects on VEGF, IL8, CXCL12 secretion, endothelial cell chemotaxis, and EMT signaling.

Main Results:

  • MCPIP1 protein levels were found to be decreased during ccRCC progression.
  • Low MCPIP1 levels strongly correlated with increased tumor proliferation, outgrowth, and vascularity.
  • MCPIP1 activity regulated VEGF, IL8, and CXCL12 secretion, impacting endothelial cell chemotaxis, VE-cadherin phosphorylation, vascular permeability, ccRCC cell motility, lung metastasis, and epithelial-mesenchymal transition (EMT).

Conclusions:

  • MCPIP1 acts as a critical regulator in ccRCC, with its decreased levels promoting tumor growth, angiogenesis, and metastasis.
  • MCPIP1 influences key signaling pathways involved in tumor progression, including EMT.
  • Targeting MCPIP1 may offer a therapeutic strategy for managing ccRCC growth and spread.

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