Can the Mitochondrial Metabolic Theory Explain Better the Origin and Management of Cancer than Can the Somatic Mutation Theory?
Level 5 - mechanism / opinion, no new human data
Narrative review and theoretical synthesis without primary human data or systematic review methodology.
PubMed 34564387 · doi:10.3390/metabo11090572
What was done
The author conducted a narrative review comparing the somatic mutation theory (SMT) and the mitochondrial metabolic theory (MMT) of cancer. The paper synthesizes mechanistic literature on cancer cell fuel dependencies, focusing on glucose utilization via glycolysis and the pentose phosphate pathway, glutaminolysis, and glutamine-dependent mitochondrial substrate-level phosphorylation.
What was found
The abstract reports no quantitative experimental data, clinical numbers, or effect sizes. It describes the biochemical reliance of cancer cells on glucose carbons and glutamine nitrogen and carbons for ATP and biomass synthesis, especially in cells with deficient oxidative phosphorylation or PKM2 overexpression. It proposes a therapeutic strategy based on simultaneous restriction of glucose and glutamine combined with elevation of non-fermentable ketone bodies.
Why it matters
This paper presents a theoretical framework challenging the standard somatic mutation paradigm in oncology, advocating for metabolic restriction of fermentable fuels as a broad therapeutic approach.
Limits
The abstract provides theoretical and mechanistic arguments without presenting original empirical data, clinical trials, or systematic search methodology. Feasibility, efficacy, and safety of dual glucose and glutamine targeting in humans are not evaluated.