Hypoxic microenvironment in cancer: role in metabolic reprogramming

Area of Science:

• Oncology
• Cancer Biology
• Tumor Microenvironment

Background:

• Hypoxia is a key feature of solid tumors, caused by abnormal vasculature and rapid growth.
• Tumor hypoxia activates hypoxia-inducible factors (HIFs), driving critical cellular processes.

Purpose of the Study:

• To review the mechanisms of hypoxia-induced metabolic reprogramming in tumors.
• To explore the role of hypoxia in tumor progression and therapeutic resistance.
• To discuss strategies targeting metabolic vulnerabilities in hypoxia-driven cancers.

Main Methods:

• Literature review synthesizing mechanistic studies.
• Analysis of data from single-cell multi-omics and spatial transcriptomics.
• Review of metabolic imaging and early-phase clinical trials.

Main Results:

• Hypoxia reprograms tumor cell metabolism (aerobic glycolysis, glutaminolysis, lipid synthesis) and stromal compartments.
• Hypoxia promotes angiogenesis, invasion, immune suppression, and resistance to therapies.
• HIF stabilization is central to these hypoxia-driven adaptations.

Conclusions:

• Hypoxia-induced metabolic reprogramming is crucial for tumor growth and therapeutic resistance.
• Targeting metabolic dependencies offers promising avenues for precision oncology.
• Exploiting these vulnerabilities may overcome treatment resistance in various malignancies.