ArticleScientific reports2022
CX-5461 induces radiosensitization through modification of the DNA damage response and not inhibition of RNA polymerase I.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 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
8 citing papers in PubMed, 10 citations in OpenAlex.
- Radiosensitization of Glioblastoma by the K-ras Inhibitor RMC-6236.bioRxiv : the preprint server for biology · 2026Article
- CX-5461 and doxorubicin activate a shared DNA damage-associated transcriptional response in human cardiomyocytes.G3 (Bethesda, Md.) · 2026Article
- Transcriptomic Landscape of Paclitaxel-Induced Multidrug Resistance in 3D Cultures of Colon Cancer Cell Line DLD1.International journal of molecular sciences · 2025Article
- The G-quadruplex ligand CX-5461: an innovative candidate for disease treatment.Journal of translational medicine · 2025Review
- Proteomics shows that brain metastases of lung adenocarcinoma overexpress ribosomal proteins in response to gamma knife radiosurgery.Scientific reports · 2024Article
- MGMT inhibition regulates radioresponse in GBM, GSC, and melanoma.Scientific reports · 2024Article
- CX‑5461 potentiates imatinib‑induced apoptosis in K562 cells by stimulatingExperimental and therapeutic medicine · 2024Article
- Regulation of RNA Polymerase I Stability and Function.Cancers · 2022Review
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
Abstract
Increased ribosome biogenesis is a distinguishing feature of cancer cells, and small molecule inhibitors of ribosome biogenesis are currently in clinical trials as single agent therapy. It has been previously shown that inhibiting ribosome biogenesis through the inhibition of nuclear export of ribosomal subunits sensitizes tumor cells to radiotherapy. In this study, the radiosensitizing potential of CX-5461, a small molecule inhibitor of RNA polymerase I, was tested. Radiosensitization was measured by clonogenic survival assay in a panel of four tumor cell lines derived from three different tumor types commonly treated with radiation. 50 nM CX-5461 radiosensitized PANC-1, U251, HeLa, and PSN1 cells with dose enhancement factors in the range of 1.2-1.3. However, 50 nM CX-5461 was not sufficient to inhibit 45S transcription alone or in combination with radiation. The mechanism of cell death with the combination of CX-5461 and radiation occurred through mitotic catastrophe and not apoptosis. CX-5461 inhibited the repair and/or enhanced the initial levels of radiation-induced DNA double strand breaks. Understanding the mechanism of CX-5461-induced radiosensitization should be of value in the potential application of the CX-5461/radiotherapy combination in cancer treatment.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.