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  • Title: Recruitment of podoplanin positive cancer-associated fibroblasts in metastatic lymph nodes predicts poor prognosis in pathological N2 stage III lung adenocarcinoma.
    Author: Neri S, Ishii G, Taira T, Hishida T, Yoshida J, Nishimura M, Nagai K, Ochiai A.
    Journal: Ann Surg Oncol; 2012 Nov; 19(12):3953-62. PubMed ID: 22669451.
    Abstract:
    BACKGROUND: Cancer-associated fibroblasts (CAFs) directly communicate with cancer cells and play important roles in cancer progression. Recent studies have reported that primary cancer tissue with podoplanin-expressing CAFs predicted a poorer outcome among stage I lung adenocarcinoma patients. However, whether podoplanin(+)-CAFs also can be recruited into metastatic lymph nodes and influence the prognosis remains unclear. METHODS: We selected 112 patients with pathological N2 stage III lung adenocarcinoma and examined the podoplanin expression of CAFs and their prognostic impact in primary and metastatic N2 lesions. RESULTS: Podoplanin(+)-CAFs were observed in 61 (54.5 %) primary sites and 44 (39.3 %) metastatic lymph nodes. Podoplanin(+)-CAFs were found at metastatic lymph nodes in 33 (54.1 %) primary podoplanin-positive and 11 (21.6 %) primary podoplanin-negative sites. These findings suggest a significant positive correlation in podoplanin expression in CAFs between pairs of primary and metastatic lesions (P < 0.001). The difference in the overall survival of patients with podoplanin-positive/negative CAFs in their primary lesion was not correlated (P = 0.927). In contrast, patients with podoplanin(+)-CAFs in metastatic lymph nodes had a shorter overall survival than those without podoplanin(+)-CAFs (P = 0.003). In multivariate analyses, podoplanin(+)-CAFs in metastatic lymph nodes were a significantly independent risk factor for a poor outcome (P = 0.007). CONCLUSIONS: Our study indicated that podoplanin(+)-CAFs in metastatic lymph nodes was a significant prognostic factor for overall survival among pathological N2 stage III adenocarcinoma patients.
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