Immune Senescence and Immune Activation in Elderly Colorectal Cancer Patients

Overview

Journal Aging (Albany NY)

Specialty Geriatrics

Date 2019 Jun 14

PMID 31195370

Citations 14

Authors

Silvia Giunco

Maria Raffaella Petrara

Francesca Bergamo

Paola Del Bianco

Marisa Zanchetta

Francesco Carmona

Vittorina Zagonel

Anita de Rossi

Sara Lonardi

Affiliations

Soon will be listed here.

Abstract

In our previous study, we found that low thymic output and short telomere length were associated with a higher risk of tumor in elderly cancer patients. Here, we aimed to examine in depth the impact of immunological and biological senescence and immune activation on disease outcome in elderly patients with colorectal cancer (CRC).Peripheral blood samples from 81 CRC patients were studied for immune activation, immune senescence and recent thymic emigrant(RTE) CD4 and CD8 cells by flow cytometry. T-cell receptor rearrangement excision circle (TREC) levels and telomere lengths were measured by real-time PCR. Plasma levels of microbial translocation markers, LPS and sCD14, were quantified by ELISA. While TREC levels and telomere length were not prognostic of disease outcome, high percentages of immune senescent and immune activated CD8 cells were associated with a higher risk of a negative event (relapse, progression, or death) in all studied patients and disease relapse in I-III staged patients. Levels of sCD14 and LPS were higher in patients who will experience a negative event than in patients who will not. In conclusion, in elderly CRC patients higher immunological senescence and immune activation negatively impact the disease outcome; how these characteristics influence the antineoplastic treatments remains to be investigated.

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