Use of genotoxicity, oxidative stress and inflammation blood biomarkers to predict the occurence of late cutaneous side effects after radiotherapy in Merkel cell carcinomas patients

Delphine Lecomte Dumont; Dinu Stefan; Samia Chaouni; François Sichel; Jean-Louis Habrand; Victor Barraux; Carine Laurent

Use of genotoxicity, oxidative stress and inflammation blood biomarkers to predict the occurence of late cutaneous side effects after radiotherapy in Merkel cell carcinomas patients

Delphine Lecomte Dumont ¹ Dinu Stefan ¹ Samia Chaouni ² François Sichel ^{1, 2} Jean-Louis Habrand ¹ Victor Barraux ¹ Carine Laurent ^{2, 3}

1 CRLC François Baclesse - Centre Régional de Lutte contre le Cancer François Baclesse

2 ABTE - Aliments Bioprocédés Toxicologie Environnements

3 SAnté et PHYsique Nucléaire - SAPHYN

Abstract : Despite the technical advances in radiotherapy, toxicity to healthy tissues remains the limiting factor of treatment. The aim of this work is to highlight one or more blood markers whose ex vivo variations after irradiation (IR) could predict the occurrence of late cutaneous side effects. For this preliminary study, we selected patients with Merkel cell carcinoma (MCC) because, although rare, their treatment only includes radiotherapy and the dosimetry data are accurate to the skin. Two groups of patients were established according to the grade of late cutaneous toxicity after adjuvant IR for MCC: (i) no or little toxicity (grade 0, 1 or 2 of the RTOG), (ii) marked toxicity (grade 3 or 4 of the RTOG). In order to try to discriminate these 2 groups, markers of interest were selected and measured on the different compartments of ex vivo irradiated blood. At the lymphocyte level, cell cycle and apoptosis (flow cytometry) and genotoxicity (micronuclei) were quantified.

Type de document :

Poster

Domaine :

Sciences du Vivant [q-bio]

Sciences du Vivant [q-bio] / Cancer

Liste complète des métadonnées

https://hal-normandie-univ.archives-ouvertes.fr/hal-02297452
Contributeur : Carine Laurent <>
Soumis le : jeudi 26 septembre 2019 - 10:48:53
Dernière modification le : lundi 21 octobre 2019 - 15:12:02

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Use of genotoxicity, oxidative stress and inflammation blood biomarkers to predict the occurence of late cutaneous side effects after radiotherapy in Merkel cell carcinomas patients

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Use of genotoxicity, oxidative stress and inflammation blood biomarkers to predict the occurence of late cutaneous side effects after radiotherapy in Merkel cell carcinomas patients

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