BACKGROUND/AIM: The cell surface receptor programmed death-1 (PD1) and its ligand (PDL1) have been detected in various cancer types. It has been reported that expression of PDL1 and PD1 in a tumor is associated with poor prognosis of the patient. In the present study, we retrospectively examined tumor expression of PDL1 and intratumoral PD1(+) cell infiltration, and assessed their relationship with patient prognosis according to the pathological stage of gastric cancer. MATERIALS AND METHODS: PDL1 and PD1 expression in primary tumors from 431 patients was evaluated using immunohistochemistry. The association between the expression of PDL1/PD1 and clinicopathological features was assessed. RESULTS: High expression of PDL1 was observed in 128 (29.6%) patients. PDL1 expression was correlated with tumor infiltration of PD1(+) cells. In multivariate analysis, PDL1 expression was associated with worse overall survival. In subset analysis, PDL1 expression was significantly associated with survival in patients with stage II/III gastric cancer. In conclusion, PDL1 was an independent prognostic factor for patients with stage II/III gastric cancer. Our results suggested that patients with stage II/III gastric cancer might be appropriate for PD1/PDL1-targeted therapy. Copyright
BACKGROUND/AIM: The cell surface receptor programmed death-1 (PD1) and its ligand (PDL1) have been detected in various cancer types. It has been reported that expression of PDL1 and PD1 in a tumor is associated with poor prognosis of the patient. In the present study, we retrospectively examined tumor expression of PDL1 and intratumoral PD1(+) cell infiltration, and assessed their relationship with patient prognosis according to the pathological stage of gastric cancer. MATERIALS AND METHODS:PDL1 and PD1 expression in primary tumors from 431 patients was evaluated using immunohistochemistry. The association between the expression of PDL1/PD1 and clinicopathological features was assessed. RESULTS: High expression of PDL1 was observed in 128 (29.6%) patients. PDL1 expression was correlated with tumor infiltration of PD1(+) cells. In multivariate analysis, PDL1 expression was associated with worse overall survival. In subset analysis, PDL1 expression was significantly associated with survival in patients with stage II/III gastric cancer. In conclusion, PDL1 was an independent prognostic factor for patients with stage II/III gastric cancer. Our results suggested that patients with stage II/III gastric cancer might be appropriate for PD1/PDL1-targeted therapy. Copyright
Authors: Kazuto Harada; Xiaochuan Dong; Jeannelyn S Estrella; Arlene M Correa; Yan Xu; Wayne L Hofstetter; Kazuki Sudo; Hisashi Onodera; Koyu Suzuki; Akihiro Suzuki; Randy L Johnson; Zhenning Wang; Shumei Song; Jaffer A Ajani Journal: Gastric Cancer Date: 2017-08-11 Impact factor: 7.370
Authors: Aaron T Mayer; Arutselvan Natarajan; Sydney R Gordon; Roy L Maute; Melissa N McCracken; Aaron M Ring; Irving L Weissman; Sanjiv S Gambhir Journal: J Nucl Med Date: 2016-12-15 Impact factor: 10.057