Human papillomavirus-associated head and neck squamous cell carcinoma cells rely on glycolysis and display reduced oxidative phosphorylation.
Level 5 - mechanism / opinion, no new human data
In vitro laboratory research using cell lines.
PubMed 38273844 · doi:10.3389/fonc.2023.1304106
What was done
Researchers evaluated oxidative phosphorylation (OXPHOS) and glycolysis in four human papillomavirus-positive (HPV+) and HPV-negative (HPV-) head and neck squamous cell carcinoma (HNSCC) cell lines. Metabolic flux was measured in intact cells using a Seahorse XF Analyzer and in permeabilized cells via high-resolution respirometry (Oroboros O2K). Metabolomic profiling was conducted using mass spectrometry.
What was found
The abstract reports directional metabolic shifts without quantitative values. HPV-negative cell lines demonstrated higher overall OXPHOS capacity and retained the ability to upregulate glycolysis when challenged. In contrast, the HPV-positive cell line displayed a higher basal glycolytic rate, lower spare OXPHOS capacity, and failed to increase respiration in response to succinate. Metabolomic analysis demonstrated a higher kynurenine/tryptophan ratio in HPV-positive cells.
Why it matters
These findings suggest that HPV-positive and HPV-negative head and neck cancers possess fundamentally distinct metabolic phenotypes, with HPV-negative tumors exhibiting greater metabolic flexibility that may contribute to their increased aggressiveness and resistance to treatment.
Limits
The study is limited to an in vitro design evaluating only four established cell lines, which may not capture patient tumor heterogeneity or the influence of the tumor microenvironment. The abstract does not provide exact numerical measurements, statistical effect sizes, or confidence intervals.
Cited by
- partial Hepatoma and papilloma viral products disrupt mitochondrial oxidative phosphorylation or replicate inside mitochondria, causing compensatory fermentation.