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Erschienen in: Head and Neck Pathology 1/2023

28.09.2022 | Original Paper

Simultaneous Expression of PD-1 and PD-L1 in Peripheral and Central Immune Cells and Tumor Cells in the Benign and Malignant Salivary Gland Tumors Microenvironment

verfasst von: Sajjad Gerdabi, Fatemeh Asadian, Razie Kiani, Bijan Khademi, Mohammad Reza Haghshenas, Nasrollah Erfani

Erschienen in: Head and Neck Pathology | Ausgabe 1/2023

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Abstract

Background

To investigate the differential expression of PD-1 and PD-L1 in salivary gland tumors (SGTs, malignant and benign subtypes) and determine their association with the clinicopathological characterization of the patients.

Methods

The immunohistochemistry was used to examine PD-1 and PD-L1 expression in specimens from 83 patients with primary SGTs including salivary ductal carcinoma (SDC), adenoid cystic carcinoma (AdCC), acinic cell carcinoma (ACC), mucoepidermoid carcinoma (MEC), warthin’s tumors (WT), poleomorphic adenoma (PA) and other subtypes.

Results

The expression of PD-1 in peripheral and central immune cells (ICs) of MEC, and peripheral ICs of ACC was significantly higher than those with AdCC (P = 0.02, P = 0.02, P = 0.03, respectively). Interestingly, the expression of PD-1 was also observed in peripheral and central malignant tumor cells (TCs), particularly in SDC and ACC. Despite no significant difference in PD-L1 expression of TCs among malignant subtypes, the peripheral and central ICs of ACC and MEC were revealed to express PDL-1 significantly more than those with AdCC (P < 0.05). WTs were rich in PD-1/PD-L1 expressing ICs. However, the tumor microenvironment of PA generally had low levels of PD-1/PD-L1 expression. In general, the expression of PD-1 in peripheral and central TCs was found to be significantly higher in malignant tumors than in benign ones (P = 0.002 and P = 0.003, respectively).

Conclusion

The simultaneous presentation of PD-1 and PD-L1 in TCs and ICs of SGTs, their significant association with disease severity as well as the positive correlation between these immune checkpoints may suggest the therapeutic potential of anti-PD-1 and anti-PDL-1 combinational immunotherapy for SGTs.
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Metadaten
Titel
Simultaneous Expression of PD-1 and PD-L1 in Peripheral and Central Immune Cells and Tumor Cells in the Benign and Malignant Salivary Gland Tumors Microenvironment
verfasst von
Sajjad Gerdabi
Fatemeh Asadian
Razie Kiani
Bijan Khademi
Mohammad Reza Haghshenas
Nasrollah Erfani
Publikationsdatum
28.09.2022
Verlag
Springer US
Erschienen in
Head and Neck Pathology / Ausgabe 1/2023
Elektronische ISSN: 1936-0568
DOI
https://doi.org/10.1007/s12105-022-01486-x

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