{Reference Type}: Journal Article
{Title}: The prognostic significance of PD-1 and its ligands in non-small cell lung cancer.
{Author}: Usluer O;Gökbayrak ÖE;Erol A;Aktaş TÇ;Batıhan G;Örs Kaya Ş;Üçvet A;Aydoğdu Z;Altun Z;Öztop İ;Aktaş S;
{Journal}: Turk Gogus Kalp Damar Cerrahisi Derg
{Volume}: 32
{Issue}: 1
{Year}: 2024 Jan
{Factor}: 0.704
{DOI}: 10.5606/tgkdc.dergisi.2024.25394
{Abstract}: <B>UNASSIGNED: </B>In this study, we aimed to investigate the prognostic value of programmed cell death protein 1 (PD-1), programmed cell death ligand 1 (PD-L1), and programmed cell death ligand 2 (PD-L2) expressions on immune and cancer cells in terms of survival in patients with lung adenocarcinoma, squamous cell carcinoma, and large cell carcinoma.<BR><B>UNASSIGNED: </B>Between January 2000 and December 2012, a total of 191 patients (172 males, 19 females; mean age: 60.3±8.4 years; range, 38 to 78 years) who were diagnosed with non-small cell lung cancer and underwent anatomic resection and mediastinal lymph node dissection were retrospectively analyzed. The patients were evaluated in three groups including lung squamous cell carcinoma (n=61), adenocarcinoma (n=66), and large-cell carcinoma (n=64). The survival rates of all three groups were compared in terms of immunohistochemical expression levels of PD-1, PD-L1, and PD-L2.<BR><B>UNASSIGNED: </B>The mean follow-up was 71.8±47.9 months. In all histological subtypes, PD-1 expressions on tumor and immune cells were observed in 33% (61/191) and in 53.1% (102/191) of the patients, respectively. Higher expression levels of PD-L1 and PD-L2 at any intensity on tumor and immune cells were defined only in lung adenocarcinomas, and PD-L1 and PD-L2 values were detected in 36.4% (22/64) of these patients. The PD-L1 expressions on tumor and immune cells were observed in 41.7% (10/24) and 25% (6/24) of the patients, respectively. The PD-L2 expressions on tumor and immune cells were detected in 16.7% (4/24) and 8.4% (2/24) of the patients, respectively. Univariate and multivariate analyses revealed that PD-1 expression in tumor cells was an independent prognostic factor in all histological subtypes.<BR><B>UNASSIGNED: </B>Our study results suggest that PD-1 expression is a poor prognostic factor for overall survival in patients with completely resected adenocarcinoma, squamous cell carcinoma, and large cell carcinoma.