ArticleJournal of cancer research and clinical oncology2025
Deficient DNA mismatch repair and Nectin-4 expression in upper tract urothelial carcinoma (UTUC).
Article in Journal of cancer research and clinical oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Correspondence on "Deficient DNA mismatch repair and Nectin-4 expression in upper tract urothelial carcinoma (UTUC)".Journal of cancer research and clinical oncology · 2025Article
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7 authors.
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Abstract
purposeTo investigate the prevalence of deficient DNA mismatch repair (dMMR) status in upper tract urothelial carcinoma (UTUC) and its association with clinicopathological characteristics as well as Nectin-4 immunohistochemical expression.
methodsWe retrospectively identified histologically confirmed UTUC cases treated at Peking University Third Hospital between December 2016 and September 2023. Eligible participants were required to also possess complete clinicopathological records and available formalin-fixed, paraffin-embedded (FFPE) tumor specimens suitable for immunohistochemical evaluation. MMR protein expression was categorized as either dMMR or proficient mismatch repair (pMMR), while Nectin-4 expression was quantitatively assessed using the H-score system. Samples were then classified as negative (H-score 0-14), low (H-score 15-99), medium (H-score 100-199), and high (H-score 200-300). Statistical significance was established at P < 0.05 using two-tailed tests.
resultsA total of 339 patients were deemed eligible, with specimens successfully evaluated. 25 patients (7.4%) demonstrated dMMR status. High Nectin-4 expression was observed in 124 patients (36.7%). A statistically significant association was identified between dMMR status and elevated Nectin-4 expression (P = 0.044). No significant differences were detected between dMMR and pMMR groups regarding clinical parameters, including gender, age, tumor grade, or immunophenotypic characteristics.
conclusionOur study revealed that 7.4% of UTUC patients exhibited dMMR status, with heterogeneous Nectin-4 expression observed across the cohort. Notably, we demonstrated a statistically significant correlation between dMMR status and elevated Nectin-4 expression, suggesting potential biological interplay. The combined biomarker profile warrants further investigation as a predictive tool for therapeutic strategies involving antibody-drug conjugates (e.g., enfortumab vedotin) and immune checkpoint inhibitors.
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