Potential clinical implications of CD4+CD26high T cells for nivolumab treated melanoma patients

Autor: Domenico Galati, Serena Zanotta, Mariaelena Capone, Gabriele Madonna, Domenico Mallardo, Marilena Romanelli, Ester Simeone, Lucia Festino, Francesca Sparano, Rosa Azzaro, Rosaria De Filippi, Antonio Pinto, Chrystal M. Paulos, Paolo A. Ascierto
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Translational Medicine, Vol 21, Iss 1, Pp 1-12 (2023)
Druh dokumentu: article
ISSN: 1479-5876
DOI: 10.1186/s12967-023-04184-6
Popis: Abstract Background Nivolumab is an anti-PD1 antibody that has dramatically improved metastatic melanoma patients’ outcomes. Nevertheless, many patients are resistant to PD-1 inhibition, occasionally experiencing severe off-target immune toxicity. In addition, no robust and reproducible biomarkers have yet been validated to identify the correct selection of patients who will benefit from anti-PD-1 treatment avoiding unwanted side effects. However, the strength of CD26 expression on CD4+ T lymphocytes permits the characterization of three subtypes with variable degrees of responsiveness to tumors, suggesting that the presence of CD26-expressing T cells in patients might be a marker of responsiveness to PD-1-based therapies. Methods The frequency distribution of peripheral blood CD26-expressing cells was investigated employing multi-parametric flow cytometry in 69 metastatic melanoma patients along with clinical characteristics and blood count parameters at baseline (W0) and compared to 20 age- and sex-matched healthy controls. Percentages of baseline CD4+CD26high T cells were correlated with the outcome after nivolumab treatment. In addition, the frequency of CD4+CD26high T cells at W0 was compared with those obtained after 12 weeks (W1) of therapy in a sub-cohort of 33 patients. Results Circulating CD4+CD26high T cells were significantly reduced in melanoma patients compared to healthy subjects (p = 0.001). In addition, a significant association was observed between a low baseline percentage of CD4+CD26high T cells (
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