Caspase 3 expression correlates with patient outcomes in gastric adenocarcinoma after gastrectomy Taipei Veterans General Hospital, Department of Surgery, Division of General Surgery National Yang-Ming University 黃國宏 楊慕華 方文良 吳秋文 石宜銘
Introduction Gastric cancer is the 5th most common cancer and 3nd leading cause of cancer related death worldwide International Journal of Cancer (GLOBOCAN 2012) 2015; 136:E359-386 p<0.001 stage IA (86.9%) stage IB (83.8%) stage IIA (75.8%) stage IIB (63%) stage IIIA (42.8%) stage IIIB (31.6%) stage IIIC (12.7%) stage IV (8.7%)
Introduction Caspase-3 (CASP3) is a major executioner protein of proteolytic degradation during apoptosis. Caspase-3 downregulation (CASP3/DR) in tumors frequently confers resistance to cancer therapy and is significantly correlated with a poor prognosis in cancer patients. The role of Caspase 3 in gastric cancer has not been investigated yet.
Caspase 3 Apoptosis can be initiated through one of two cell-signaling pathways. Both pathways converge on caspase-3, a protein that acts as the cell’s executioner. PAC-1 (Procaspase Activating Factor-1, see below) bypasses both pathways and initiates apoptosis by inducing procaspase-3 to cleave itself to yield active caspase-3.
Patients and Methods 366 gastric cancer patients after curative gastrectomy Using Immunohistochemical(IHC) stains. Clinicopathological appearances and survival data were analyzed. IHC score 0 : < 5 % positive cells, 1+: 5–25 % positive cells 2+:26–75 % positive cells 3+: >75 % positive cells
Panoremic Viewer
Positive and negative control
Immunohistochemical stains
-: 241 patients Results 1+: 84 patients 2+: 32 patients 3+: 9 patients Positive rate--34.2%
Overall survival
Disease free survival
AJCC TNM Stage Stage I Stage II Stage III
Discussion Our studies revealed that gastric cancer patients with Caspase 3 expression had better prognosis than those without. Caspase 3 could be a potential prognostic biomarker in gastric cancer patients who received curative surgery.
Discussion Caspase 3 expression is associated with better clinicopathological appearances and may act as a tumor suppressor in human gastric cancer. Further studies, such as in vitro and in vivo studies, are necessary to demonstrate the mechanism of Caspase 3 on the role of carcinogenesis in gastric cancer.
Thanks for your attention