Influence of Immunoexpression of Mismatch Repair Complex Proteins on Disease-Free Survival in Non-Surgically Treated Oropharyngeal Squamous Cell Carcinomas

Objective To evaluate the influence of MMR complex protein immunoexpression on disease-free survival in oropharyngeal SCC treated non-surgically. Materials and methods: 85 cases of oropharyngeal SCC diagnosed and treated at the Ceará Cancer Institute were surveyed, from which clinical-pathological d...

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Veröffentlicht in:Head & neck pathology (Totowa, N.J.) N.J.), 2024-11, Vol.18 (1), p.125, Article 125
Hauptverfasser: Coelho, Lívia Moreira Caetano, Dantas, Thinali Sousa, de Barros Silva, Paulo Goberlânio, Barbosa, Jennifer Vianna, Teixeira, André Costa, Alves, Ana Paula Negreiros Nunes, Mota, Mário Rogério Lima, Vila, Pilar Gándara, Ortega, Karem L., Sousa, Fabrício Bitu
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container_title Head & neck pathology (Totowa, N.J.)
container_volume 18
creator Coelho, Lívia Moreira Caetano
Dantas, Thinali Sousa
de Barros Silva, Paulo Goberlânio
Barbosa, Jennifer Vianna
Teixeira, André Costa
Alves, Ana Paula Negreiros Nunes
Mota, Mário Rogério Lima
Vila, Pilar Gándara
Ortega, Karem L.
Sousa, Fabrício Bitu
description Objective To evaluate the influence of MMR complex protein immunoexpression on disease-free survival in oropharyngeal SCC treated non-surgically. Materials and methods: 85 cases of oropharyngeal SCC diagnosed and treated at the Ceará Cancer Institute were surveyed, from which clinical-pathological data and paraffin blocks of incisional biopsies were retrieved for immunohistochemical reaction for MSH2, MSH6, PMS2, MLH1 and p16. Disease-free survival was calculated and Kruskal-Wallis and Friedman/Dunn tests, chi-square and Fisher’s exact, Log-Rank Mantel Cox and Cox regression were performed. Results: In p16- tumors, loss of MSH2 expression was associated with shorter disease-free survival ( p  = 0.035) and mean MSH6 expression was significantly higher than MSH2 ( p  = 0.001). Loss of MSH2 expression in p16 + tumors was associated with longer disease-free survival compared to p16- tumors. Imbalance in the MSH6/MSH2 ratio in p16 + tumors was associated with longer survival compared to p16- tumors. MLH1/PMS2 imbalance was significantly higher in p16 + with recurrence ( p  = 0.003). Low MSH2 immunoexpression increased the risk of relapse by 9.10 times (CI95% 1.99 to 83.06). Conclusion: Microsatellite instability in oropharyngeal SCC is demonstrated by the association between loss of protein expression and its heterodimer imbalance with disease-free survival. It was demonstrated that the imbalance of the MMR complex can consequently lead to resistance to treatment and a decrease in disease-free survival in p16 + oropharyngeal SCC tumors.
doi_str_mv 10.1007/s12105-024-01736-0
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Materials and methods: 85 cases of oropharyngeal SCC diagnosed and treated at the Ceará Cancer Institute were surveyed, from which clinical-pathological data and paraffin blocks of incisional biopsies were retrieved for immunohistochemical reaction for MSH2, MSH6, PMS2, MLH1 and p16. Disease-free survival was calculated and Kruskal-Wallis and Friedman/Dunn tests, chi-square and Fisher’s exact, Log-Rank Mantel Cox and Cox regression were performed. Results: In p16- tumors, loss of MSH2 expression was associated with shorter disease-free survival ( p  = 0.035) and mean MSH6 expression was significantly higher than MSH2 ( p  = 0.001). Loss of MSH2 expression in p16 + tumors was associated with longer disease-free survival compared to p16- tumors. Imbalance in the MSH6/MSH2 ratio in p16 + tumors was associated with longer survival compared to p16- tumors. MLH1/PMS2 imbalance was significantly higher in p16 + with recurrence ( p  = 0.003). Low MSH2 immunoexpression increased the risk of relapse by 9.10 times (CI95% 1.99 to 83.06). Conclusion: Microsatellite instability in oropharyngeal SCC is demonstrated by the association between loss of protein expression and its heterodimer imbalance with disease-free survival. 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Materials and methods: 85 cases of oropharyngeal SCC diagnosed and treated at the Ceará Cancer Institute were surveyed, from which clinical-pathological data and paraffin blocks of incisional biopsies were retrieved for immunohistochemical reaction for MSH2, MSH6, PMS2, MLH1 and p16. Disease-free survival was calculated and Kruskal-Wallis and Friedman/Dunn tests, chi-square and Fisher’s exact, Log-Rank Mantel Cox and Cox regression were performed. Results: In p16- tumors, loss of MSH2 expression was associated with shorter disease-free survival ( p  = 0.035) and mean MSH6 expression was significantly higher than MSH2 ( p  = 0.001). Loss of MSH2 expression in p16 + tumors was associated with longer disease-free survival compared to p16- tumors. Imbalance in the MSH6/MSH2 ratio in p16 + tumors was associated with longer survival compared to p16- tumors. MLH1/PMS2 imbalance was significantly higher in p16 + with recurrence ( p  = 0.003). Low MSH2 immunoexpression increased the risk of relapse by 9.10 times (CI95% 1.99 to 83.06). Conclusion: Microsatellite instability in oropharyngeal SCC is demonstrated by the association between loss of protein expression and its heterodimer imbalance with disease-free survival. 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Materials and methods: 85 cases of oropharyngeal SCC diagnosed and treated at the Ceará Cancer Institute were surveyed, from which clinical-pathological data and paraffin blocks of incisional biopsies were retrieved for immunohistochemical reaction for MSH2, MSH6, PMS2, MLH1 and p16. Disease-free survival was calculated and Kruskal-Wallis and Friedman/Dunn tests, chi-square and Fisher’s exact, Log-Rank Mantel Cox and Cox regression were performed. Results: In p16- tumors, loss of MSH2 expression was associated with shorter disease-free survival ( p  = 0.035) and mean MSH6 expression was significantly higher than MSH2 ( p  = 0.001). Loss of MSH2 expression in p16 + tumors was associated with longer disease-free survival compared to p16- tumors. Imbalance in the MSH6/MSH2 ratio in p16 + tumors was associated with longer survival compared to p16- tumors. MLH1/PMS2 imbalance was significantly higher in p16 + with recurrence ( p  = 0.003). Low MSH2 immunoexpression increased the risk of relapse by 9.10 times (CI95% 1.99 to 83.06). Conclusion: Microsatellite instability in oropharyngeal SCC is demonstrated by the association between loss of protein expression and its heterodimer imbalance with disease-free survival. It was demonstrated that the imbalance of the MMR complex can consequently lead to resistance to treatment and a decrease in disease-free survival in p16 + oropharyngeal SCC tumors.</abstract><cop>New York</cop><pub>Springer US</pub><pmid>39601931</pmid><doi>10.1007/s12105-024-01736-0</doi></addata></record>
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source MEDLINE; SpringerNature Journals
subjects Adult
Aged
Aged, 80 and over
Biomarkers, Tumor - analysis
Biomarkers, Tumor - metabolism
Carcinoma, Squamous Cell - metabolism
Carcinoma, Squamous Cell - mortality
Carcinoma, Squamous Cell - pathology
Dentistry
Disease-Free Survival
DNA Mismatch Repair
Female
Humans
Immunohistochemistry
Male
Medicine
Medicine & Public Health
Middle Aged
MutS Homolog 2 Protein - analysis
MutS Homolog 2 Protein - metabolism
Oral and Maxillofacial Surgery
Oropharyngeal Neoplasms - metabolism
Oropharyngeal Neoplasms - mortality
Oropharyngeal Neoplasms - pathology
Otorhinolaryngology
Pathology
Squamous Cell Carcinoma of Head and Neck - metabolism
Squamous Cell Carcinoma of Head and Neck - mortality
Squamous Cell Carcinoma of Head and Neck - pathology
title Influence of Immunoexpression of Mismatch Repair Complex Proteins on Disease-Free Survival in Non-Surgically Treated Oropharyngeal Squamous Cell Carcinomas
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