TY - JOUR
T1 - Inflammatory monocyte mobilization decreases patient survival in pancreatic cancer
T2 - A role for targeting the CCL2/CCR2 axis
AU - Sanford, Dominic E.
AU - Belt, Brian A.
AU - Panni, Roheena Z.
AU - Mayer, Allese
AU - Deshpande, Anjali D.
AU - Carpenter, Danielle
AU - Mitchem, Jonathan B.
AU - Plambeck-Suess, Stacey M.
AU - Worley, Lori A.
AU - Goetz, Brian D.
AU - Wang-Gillam, Andrea
AU - Eberlein, Timothy J.
AU - Denardo, David G.
AU - Goedegebuure, Simon Peter
AU - Linehan, David C.
PY - 2013/7/1
Y1 - 2013/7/1
N2 - Purpose: To determine the role of the CCL2/CCR2 axis and inflammatory monocytes (CCR2+/CD14+) as immunotherapeutic targets in the treatment of pancreatic cancer. Experimental Design: Survival analysis was conducted to determine if the prevalence of preoperative blood monocytes correlates with survival in patients with pancreatic cancer following tumor resection. Inflammatory monocyte prevalence in the blood and bone marrow of patients with pancreatic cancer and controls was compared. The immunosuppressive properties of inflammatory monocytes and macrophages in the blood and tumors, respectively, of patients with pancreatic cancer were assessed. CCL2 expression by human pancreatic cancer tumors was compared with normal pancreas. A novel CCR2 inhibitor (PF-04136309) was tested in an orthotopic model of murine pancreatic cancer. Results: Monocyte prevalence in the peripheral blood correlates inversely with survival, and low monocyte prevalence is an independent predictor of increased survival in patients with pancreatic cancer with resected tumors. Inflammatory monocytes are increased in the blood and decreased in the bone marrow of patients with pancreatic cancer compared with controls. An increased ratio of inflammatory monocytes in the blood versus the bone marrow is a novel predictor of decreased patient survival following tumor resection. Human pancreatic cancer produces CCL2, and immunosuppressive CCR2+ macrophages infiltrate these tumors. Patients with tumors that exhibit high CCL2 expression/low CD8 T-cell infiltrate have significantly decreased survival. In mice, CCR2 blockade depletes inflammatory monocytes and macrophages from the primary tumor and premetastatic liver resulting in enhanced antitumor immunity, decreased tumor growth, and reduced metastasis. Conclusions: Inflammatory monocyte recruitment is critical to pancreatic cancer progression, and targeting CCR2 may be an effective immunotherapeutic strategy in this disease.
AB - Purpose: To determine the role of the CCL2/CCR2 axis and inflammatory monocytes (CCR2+/CD14+) as immunotherapeutic targets in the treatment of pancreatic cancer. Experimental Design: Survival analysis was conducted to determine if the prevalence of preoperative blood monocytes correlates with survival in patients with pancreatic cancer following tumor resection. Inflammatory monocyte prevalence in the blood and bone marrow of patients with pancreatic cancer and controls was compared. The immunosuppressive properties of inflammatory monocytes and macrophages in the blood and tumors, respectively, of patients with pancreatic cancer were assessed. CCL2 expression by human pancreatic cancer tumors was compared with normal pancreas. A novel CCR2 inhibitor (PF-04136309) was tested in an orthotopic model of murine pancreatic cancer. Results: Monocyte prevalence in the peripheral blood correlates inversely with survival, and low monocyte prevalence is an independent predictor of increased survival in patients with pancreatic cancer with resected tumors. Inflammatory monocytes are increased in the blood and decreased in the bone marrow of patients with pancreatic cancer compared with controls. An increased ratio of inflammatory monocytes in the blood versus the bone marrow is a novel predictor of decreased patient survival following tumor resection. Human pancreatic cancer produces CCL2, and immunosuppressive CCR2+ macrophages infiltrate these tumors. Patients with tumors that exhibit high CCL2 expression/low CD8 T-cell infiltrate have significantly decreased survival. In mice, CCR2 blockade depletes inflammatory monocytes and macrophages from the primary tumor and premetastatic liver resulting in enhanced antitumor immunity, decreased tumor growth, and reduced metastasis. Conclusions: Inflammatory monocyte recruitment is critical to pancreatic cancer progression, and targeting CCR2 may be an effective immunotherapeutic strategy in this disease.
UR - http://www.scopus.com/inward/record.url?scp=84879850236&partnerID=8YFLogxK
U2 - 10.1158/1078-0432.CCR-13-0525
DO - 10.1158/1078-0432.CCR-13-0525
M3 - Article
C2 - 23653148
AN - SCOPUS:84879850236
SN - 1078-0432
VL - 19
SP - 3404
EP - 3415
JO - Clinical Cancer Research
JF - Clinical Cancer Research
IS - 13
ER -