Hypoxia, angiogenesis, and metabolism in the hereditary kidney cancers

Area of Science:

• Oncology
• Genetics
• Molecular Biology

Background:

• Hereditary kidney cancer research has advanced with identified genetic syndromes.
• Key molecular defects involve impaired angiogenesis and metabolic signaling, primarily due to altered hypoxia signaling.
• The von Hippel-Lindau (VHL) tumor suppressor mutation serves as a model for pseudohypoxia in renal cell carcinoma.

Purpose of the Study:

• To review renal tumor angiogenesis and metabolism from a hypoxia-inducible factor (HIF)-centric perspective.
• To explore molecular alterations in hereditary kidney cancer driven by HIF deregulation.
• To connect these aberrations to tumor growth and therapeutic strategies.

Main Methods:

• Review of existing literature on hereditary kidney cancer syndromes.
• Analysis of molecular defects related to angiogenesis and metabolism.
• Focus on the role of hypoxia signaling and HIF family members.

Main Results:

• Hereditary kidney cancer syndromes exhibit consistent deficits in angiogenesis and metabolism linked to hypoxia signaling.
• VHL mutations and hereditary leiomyomatosis and renal cell carcinoma (HLRCC) mimic pseudohypoxia features.
• HIF deregulation drives aberrant angiogenic signals and altered bioenergetics (glycolysis/glutamine).

Conclusions:

• Altered HIF signaling and associated metabolic/angiogenic defects create an environment permissive for aggressive kidney tumorigenesis, particularly in the proximal renal tubule.
• These findings provide critical insights into the cellular mechanisms driving hereditary kidney cancer.
• The identified features are actionable for current and future kidney cancer therapeutics.