Chemokines and their receptors are involved in tumourigenicity and clinicopathological significance of chemokines receptor expression in pancreatic adenocarcinoma (PA) is not fully understood. This study was conducted to determine patients' outcome according to the expressions of CXCR4, CXCR7 and HIF-1a after resection of PA. Immunohistochemistry for CXCR4, CXCR7 and HIF-1a expressions as well as cell proliferative index (Ki-67) was conducted in 71 resected (R0) PA and their 48 related lymph nodes (LN) using tissue microarray. CXCR4 and CXCR7 expressions were positively correlated to HIF-1a suggesting a potential role of HIF-1a in CXCR4 and CXCR7 transcription activation. Patients with CXCR4 high tumour expression had shorter OS than those with low expression (median survival: 9.7 vs 43.2 months, P ¼ 0.0006), a higher risk of LN metastases and liver recurrence. In multivariate analysis, high CXCR4 expression, LN metastases and poorly differentiated tumour are independent negative prognosis factors. In a combining analysis, patients with CXCR4 low /CXCR7 low tumour had a significantly shorter DFS and OS than patients with a CXCR7 high /CXCR4 high tumour. CXCR4 in resected PA may represent a valuable prognostic factor as well as an attractive target for therapeutic purpose.
No clear advantage of using robotics in the Nissen procedure was observed. The procedure seems to be feasible and safe. The technique is limited because of unadapted instruments. The disadvantages are the high costs and prolonged operative time.
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