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Published in: BMC Immunology 1/2021

Open Access 01-12-2021 | Research

Cisplatin-based chemoradiation decreases telomerase-specific CD4 TH1 response but increases immune suppressive cells in peripheral blood

Authors: Jihane Boustani, Elodie Lauret Marie Joseph, Etienne Martin, Salim Benhmida, Benoit Lecoester, Florent Tochet, Céline Mirjolet, Cédric Chevalier, David Thibouw, Noémie Vulquin, Stéphanie Servagi, Xushan Sun, Olivier Adotévi

Published in: BMC Immunology | Issue 1/2021

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Abstract

Background

The synergistic effect of chemoradiation (CRT) has been previously demonstrated in several cancer types. Here, we investigated the systemic immune effects of CRT in patients with lung or head and neck cancer.

Materials and methods

Peripheral blood mononuclear cells were collected at baseline and 1 month after treatment from blood samples of 29 patients treated with cisplatin-based chemoradiotherapy for lung or head and neck cancer. Circulating anti-tumor Th1 response was assessed by the ELISpot assay using a mixture of human leucocyte antigen (HLA) class II restricted peptides derived from telomerase (TERT). Phenotyping of circulating immunosuppressive cells (Treg and MDSC) was performed by flow cytometry.

Results

A significant increase of circulating Treg was observed in 60% of patients after CRT The mean rate of Treg was 3.1% versus 4.9% at baseline and after CRT respectively, p = 0.0015). However, there was a no significant increase of MDSC rate after CRT. In contrast, a decrease of tumor-specific Th1 response was documented in 7 out of 10 evaluated patients. We found high frequency of pre-existing tumor-specific Th1 response among patients with objective response after CRT compared to non-responders.

Conclusion

Cisplatin-based CRT promotes expansion of Treg and decrease of circulating anti-tumor Th1 response in peripheral blood. The balance towards a sustained specific anti-tumor T-cell response appears to be associated with response to CRT.
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Metadata
Title
Cisplatin-based chemoradiation decreases telomerase-specific CD4 TH1 response but increases immune suppressive cells in peripheral blood
Authors
Jihane Boustani
Elodie Lauret Marie Joseph
Etienne Martin
Salim Benhmida
Benoit Lecoester
Florent Tochet
Céline Mirjolet
Cédric Chevalier
David Thibouw
Noémie Vulquin
Stéphanie Servagi
Xushan Sun
Olivier Adotévi
Publication date
01-12-2021
Publisher
BioMed Central
Published in
BMC Immunology / Issue 1/2021
Electronic ISSN: 1471-2172
DOI
https://doi.org/10.1186/s12865-021-00429-5

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