Integration of dose surface maps and genetic data identifies the lower posterior rectum as a key region for toxicity after prostate cancer radiotherapy: novel biomarkers and precision medicine
Genome-wide association studies are the gold standard for identifying SNP associated with rectal toxicity after prostate cancer radiotherapy. However, they often neglect the radiotherapy dose distribution, which is a key contributor to toxicity risk. Here, we combined rectal dose surface maps with g...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
December 1, 2025
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| In: |
Clinical cancer research
Year: 2025, Jahrgang: 31, Heft: 23, Pages: 5006-5014 |
| ISSN: | 1557-3265 |
| DOI: | 10.1158/1078-0432.CCR-25-2102 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1158/1078-0432.CCR-25-2102
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| Verfasserangaben: | Artemis Bouzaki, Eliana Vasquez Osorio, Sarah Kerns, Marcel van Herk, Andrew Morris, Jane Shortall, David Azria, Marie-Pierre Farcy-Jacquet, Jenny Chang-Claude, Ananya Choudhury, Alison Dunning, Maarten Lambrecht, Barbara Avuzzi, Dirk De Ruysscher, Petra Seibold, Elena Sperk, Christopher Talbot, Ana Vega, Liv Veldeman, Adam Webb, Barry Rosenstein, Catharine West, Tiziana Rancati, Eliana Gioscio, and Alan McWilliam |
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| 245 | 1 | 0 | |a Integration of dose surface maps and genetic data identifies the lower posterior rectum as a key region for toxicity after prostate cancer radiotherapy |b novel biomarkers and precision medicine |c Artemis Bouzaki, Eliana Vasquez Osorio, Sarah Kerns, Marcel van Herk, Andrew Morris, Jane Shortall, David Azria, Marie-Pierre Farcy-Jacquet, Jenny Chang-Claude, Ananya Choudhury, Alison Dunning, Maarten Lambrecht, Barbara Avuzzi, Dirk De Ruysscher, Petra Seibold, Elena Sperk, Christopher Talbot, Ana Vega, Liv Veldeman, Adam Webb, Barry Rosenstein, Catharine West, Tiziana Rancati, Eliana Gioscio, and Alan McWilliam |
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| 520 | |a Genome-wide association studies are the gold standard for identifying SNP associated with rectal toxicity after prostate cancer radiotherapy. However, they often neglect the radiotherapy dose distribution, which is a key contributor to toxicity risk. Here, we combined rectal dose surface maps with genetic data to identify rectal regions in which variants influence dose-toxicity relationships.Data were analyzed from 1,293 patients with prostate cancer from the REQUITE study. Deep learning rectum contouring ensured consistent segmentation, and rectum lengths were standardized to generate two-dimensional dose surface maps. Patients were categorized based on the presence of risk alleles for three candidate SNP (rs1801516, rs17055178, and rs17630638). Propensity score matching accounted for age, rectal volume, prostate volume, and hormone therapy. Voxel-wise Cox proportional hazards models with permutation testing assessed dose-toxicity associations.Voxel-wise Cox proportional hazards models revealed significant (P < 0.05) dose-toxicity associations in risk allele carriers for all SNP for bowel urgency. Risk regions were consistently in the lower posterior rectum. Higher risk of acute bowel control was identified among carriers of the risk allele for rs17630638. For this SNP, carriers of the risk allele showed a higher risk for late rectal bleeding but a reduced risk for acute rectal bleeding.This study identified genotype-driven toxicity patterns using spatial dose mapping. By revealing consistent high-risk rectal regions, this approach strengthens the link between genomics and radiotherapy planning. Importantly, modern radiotherapy planning makes it feasible to reduce dose in genetically sensitive patients and move toward more personalized treatment. | ||
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