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Steroids Reveal Vitamin B3 Vulnerability in Glioblastoma as Methionine Restriction Slows Tumour Growth in Models

The Science Advances study identifies a diet–drug interaction that requires clinical testing before it can inform patient care.

Overview

  • Researchers from a European consortium report that widely used steroid drugs dramatically alter how glioblastoma cells process vitamin B3 (niacin).
  • Combining steroid treatment with dietary strategies that limit the amino acid methionine slowed tumour growth in preclinical laboratory and animal models.
  • Scientists describe the shift in vitamin B3 metabolism as a previously hidden vulnerability that could inform future diagnostic and therapeutic approaches.
  • The project included the Cancer Research UK Scotland Institute in Glasgow and received partial funding from Cancer Research UK, according to spokesperson Sam Godfrey.
  • Glioblastoma remains a fast-growing cancer with few effective options, and experts stress that the new findings are not yet a clinical treatment or diet recommendation.