Trial reportActa oncologica (Stockholm, Sweden)2025
Tolerability, safety and feasibility of metformin combined with chemoradiotherapy in patients with locally advanced cervical cancer: A phase II, randomized study.
Trial report in Acta oncologica (Stockholm, Sweden), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Targeting GSTZ1 Sensitizes KRASG12C-Mutant Lung Cancer Cells by Overcoming Glutathione and Glycolysis Pathway Rewiring.Cancer research communications · 2026Article
- The interplay between DNA damage response and mitochondrial dysfunction in radiotherapy.Frontiers in oncology · 2025Review
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
background and purposeLocally advanced cervical cancer is treated with chemoradiotherapy. The treatment-related morbidity is high. Tumor hypoxia has prognostic impact and represents a valid, interventional target. This phase II study investigated efficacy of the antidiabetic drug metformin to modify hypoxia according to established biomarkers. Preliminary results including tolerability, safety and feasibility are reported here. PATIENTS AND
methodsPatients were included in a 1:1 randomized, open-label design, comparing standard chemoradiotherapy ± metformin. Metformin 850 mg twice daily was administered 1 week before and during chemoradiotherapy. Magnetic resonance images (MRI) and tumor biopsies were collected at baseline, after 1 week of metformin treatment, and at brachytherapy for biomarker assessments. Tolerability and safety were determined by treatment completion rates and frequency of adverse events (AEs). Safety was further evaluated by possible increase in MRI-based hypoxia during the first week of metformin. Feasibility was determined by proportion of completed study interventions and imaging and biopsy procedures.
resultsIn total, 18 and 23 patients were allocated to the intervention and control arm, respectively. Eighteen and 15 patients completed metformin treatment for 1 and 5 weeks. Frequency of AEs ≥ grade 3 was not significantly different between study arms. Most AEs were gastrointestinal toxicities. Tumors with increase in hypoxia during the first week were all below the defined safety limit. A total of 98% of scheduled MR series and biopsies were collected with satisfactory quality.
interpretationAddition of metformin to chemoradiotherapy is tolerable and safe. Serial sampling of MRI and tumor biopsies for hypoxia biomarker assessment is feasible.
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