High degree of heterogeneity of PD-L1 and PD-1 from primary to metastatic endometrial cancer.
Gynecol Oncol
; 157(1): 260-267, 2020 04.
Article
en En
| MEDLINE
| ID: mdl-31973911
ABSTRACT
OBJECTIVE:
PD-L1 and PD-1 are predictive markers for immunotherapy and increasingly relevant in endometrial cancer. The reported fraction of positive primary tumors has been inconsistent. We investigated the expression of PD-L1 and PD-1 in primary tumors, also stratified by MSI. As immunotherapy is foremost relevant for metastatic disease, PD-L1 and PD-1 expression was also assessed in corresponding metastatic lesions.METHODS:
PD-L1 and PD-1 was investigated in a prospective, population based endometrial cancer cohort of 700 patients with corresponding metastatic lesions from 68 and 74 patients respectively. Fresh tissue was used for gene expression analysis.RESULTS:
In primary tumors, PD-L1 and PD-1 are expressed in 59% and 63%, respectively, but with no impact on survival, nor when stratified for MSS and MSI. Expression patterns of PD-L1 and PD-1 are similar in MSI and MSS tumors. Available metastatic lesions show heterogeneous expression of PD-L1 and PD-1. In gene expression analysis several genes related to immunological activity, including CD274 (encoding for PD-L1), were upregulated in PD-1 positive tumors.CONCLUSION:
PD-L1 and PD-1 are frequently expressed in endometrial cancer and expression patterns are similar across MSS and MSI tumors. Expression in corresponding metastatic lesions is discordant compared to primary tumors. These findings are in particular relevant for treatment decisions in advanced and recurrent disease.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Neoplasias Endometriales
/
Antígeno B7-H1
/
Receptor de Muerte Celular Programada 1
Tipo de estudio:
Prognostic_studies
Límite:
Aged
/
Female
/
Humans
Idioma:
En
Revista:
Gynecol Oncol
Año:
2020
Tipo del documento:
Article
País de afiliación:
Noruega