Abstract
POLE, POLD1, and NTHL1 are involved in DNA replication and have recently been recognized as hereditary cancer-predisposing genes, because their alterations are associated with colorectal cancer and other tumors. POLE/POLD1-associated syndrome shows an autosomal dominant inheritance, whereas NTHL1-associated syndrome follows an autosomal recessive pattern. Although the prevalence of germline monoallelic POLE/POLD1 and biallelic NTHL1 pathogenic variants is low, they determine different phenotypes with a broad tumor spectrum overlapping that of other hereditary conditions like Lynch Syndrome or Familial Adenomatous Polyposis. Endometrial and breast cancers, and probably ovarian and brain tumors are also associated with POLE/POLD1 alterations, while breast cancer and other unusual tumors are correlated with NTHL1 pathogenic variants. POLE-mutated colorectal and endometrial cancers are associated with better prognosis and may show favorable responses to immunotherapy. Since POLE/POLD1-mutated tumors show a high tumor mutational burden producing an increase in neoantigens, the identification of POLE/POLD1 alterations could help select patients suitable for immunotherapy treatment. In this review, we will investigate the role of POLE, POLD1, and NTHL1 genetic variants in cancer predisposition, discussing the potential future therapeutic applications and assessing the utility of performing a routine genetic testing for these genes, in order to implement prevention and surveillance strategies in mutation carriers.
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The authors thank Dr. Chiara Drago for the English language revision.
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LM, DF, CB, AR, and VB conceived, wrote, and critically revised the manuscript with the contribution of AF, LRC, RS, CF, and AD. Literature data were acquired and analyzed by LM, DF, CB, AF, LRC, RS, CF, and AD. The figures of the manuscript were conceived and designed by AF, CB, and LRC. The tables were conceived and designed by LM, DF, and CB. AF, LRC, RS, CF, and AD participated to the critical revision of the manuscript. All authors have read and approved the final version of the manuscript.
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Magrin, L., Fanale, D., Brando, C. et al. POLE, POLD1, and NTHL1: the last but not the least hereditary cancer-predisposing genes. Oncogene 40, 5893–5901 (2021). https://doi.org/10.1038/s41388-021-01984-2
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DOI: https://doi.org/10.1038/s41388-021-01984-2
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