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Current Medicinal Chemistry

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ISSN (Online): 1875-533X

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General Review Article

Circulating Biomarkers for Response Prediction of Rectal Cancer to Neoadjuvant Chemoradiotherapy

Author(s): Chiara Bedin, Sara Crotti, Edoardo D’Angelo, Sara D’Aronco, Salvatore Pucciarelli and Marco Agostini*

Volume 27, Issue 25, 2020

Page: [4274 - 4294] Pages: 21

DOI: 10.2174/0929867326666190507084839

Price: $65

Abstract

Rectal cancer response to neoadjuvant Chemoradiotherapy (pCRT) is highly variable. In fact, it has been estimated that only about 21 % of patients show pathologic Complete Response (pCR) after therapy, while in most of the patients a partial or incomplete tumour regression is observed. Consequently, patients with a priori chemoradioresistant tumour should not receive the treatment, which is associated with substantial adverse effects and does not guarantee any clinical benefit. For Locally Advanced Rectal Cancer Patients (LARC), a standardized neoadjuvant treatment protocol is applied, the identification and the usefulness of prognostic or predictive biomarkers can improve the antitumoural treatment strategy, modifying the sequence, dose, and combination of radiotherapy, chemotherapy and surgical resection.

For these reasons, a growing number of studies are actually focussed on the discovery and investigation of new predictive biomarkers of response to pCRT. In this review, we have selected the most recent literature (2012-2017) regarding the employment of blood-based biomarkers potentially predicting pCR in LARC patients and we have critically discussed them to highlight their real clinical benefit and the current limitations of the proposed methodological approaches.

Keywords: Rectal cancer, neoadjuvant, predictive biomarkers, blood-based biomarkers, radiotherapy, chemotherapy.

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