PT  - JOURNAL ARTICLE
AU  - JINAH CHU
AU  - MIN-KYUNG YEO
AU  - SANG HWA LEE
AU  - MI YEON LEE
AU  - SEOUNG WAN CHAE
AU  - HYUN-SOO KIM
AU  - SUNG-IM DO
TI  - Clinicopathological and Prognostic Significance of Programmed Death Ligand-1 SP142 Expression in 132 Patients With Triple-negative Breast Cancer
AID  - 10.21873/invivo.13030
DP  - 2022 Nov 01
TA  - In Vivo
PG  - 2890--2898
VI  - 36
IP  - 6
4099  - http://iv.iiarjournals.org/content/36/6/2890.short
4100  - http://iv.iiarjournals.org/content/36/6/2890.full
SO  - In Vivo2022 Nov 01; 36
AB  - Background/Aim: The prognostic value of programmed death ligand-1 (PD-L1) expression in triple-negative breast cancer (TNBC) has not been sufficiently investigated. In this study, we examined whether PD-L1 expression status is associated with clinicopathological features and outcomes of patients with TNBC. Patients and Methods: Immunostaining for PD-L1 SP142 was performed on tissue microarrays containing 132 TNBC samples. High PD-L1 expression was defined as ≥10% of the tumor area occupied by PD-L1-expressing cells. Results: Thirty-five (26.5%) patients showed high PD-L1 SP142 expression on immune cells (ICs). High IC PD-L1 expression was significantly correlated with smaller tumor size (p=0.030), absence of lymphovascular invasion (p=0.024), and fewer lymph node metastases (p=0.002). Multivariate survival analysis revealed that high IC PD-L1 expression independently predicted better disease-free survival (DFS) of TNBC patients. Conclusion: High PD-L1 SP142 expression on ICs was significantly associated with favorable clinicopathological parameters and better outcomes in patients with TNBC. Our observations suggest that high IC PD-L1 expression can be used as an independent prognostic marker for predicting better DFS in patients with TNBC.