The Warburg effect in cancer cells describes aerobic glycolysis — glucose is converted to lactate even in the presence of oxygen. The metabolic advantage this provides to proliferating tumour cells (beyond ATP generation) is primarily:

• A Lactate production acidifies the tumour microenvironment, inhibiting immune cell function
• B Glycolytic intermediates are channelled into biosynthetic pathways (serine, nucleotides, lipids) supporting rapid cell division ✓
• C Aerobic glycolysis generates more ATP per glucose molecule than oxidative phosphorylation
• D Glucose-derived NADH from glycolysis is more efficiently used for NADPH generation

Explanation

The Warburg effect provides biosynthetic precursors rather than just ATP for rapidly dividing cells. Glycolytic intermediates are diverted to: the HMP shunt (ribose-5-phosphate for nucleotides, NADPH for fatty acid synthesis), serine biosynthesis (from 3-phosphoglycerate), glycerophospholipids (from dihydroxyacetone phosphate), and one-carbon metabolism. Cancer cells prioritise biomass (nucleic acids, proteins, lipids) over ATP efficiency. Aerobic glycolysis actually generates less ATP per glucose (net 2 ATP) vs. oxidative phosphorylation (30-32 ATP). Lactate acidification is also significant for immune evasion but is considered a secondary advantage rather than the primary proliferative driver.

Reference: Harper's Illustrated Biochemistry, 32nd ed.

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Written and medically reviewed by the StethoPrep medical team.