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Wyler, L.* ; Napoli, C.U.* ; Ingold, B.* ; Sulser, T.* ; Heikenwälder, M. ; Schraml, P.* ; Moch, H.*

Brain metastasis in renal cancer patients: Metastatic pattern, tumour-associated macrophages and chemokine/chemoreceptor expression.

Br. J. Cancer 110, 686-694 (2014)
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Background:The mechanisms of brain metastasis in renal cell cancer (RCC) patients are poorly understood. Chemokine and chemokine receptor expression may contribute to the predilection of RCC for brain metastasis by recruitment of monocytes/macrophages and by control or induction of vascular permeability of the blood-brain barrier.Methods:Frequency and patterns of brain metastasis were determined in 246 patients with metastatic RCC at autopsy. Expression of CXCR4, CCL7 (MCP-3), CCR2 and CD68+ tumour-associated macrophages (TAMs) were analysed in a separate series of 333 primary RCC and in 48 brain metastases using immunohistochemistry.Results:Fifteen percent of 246 patients with metastasising RCC had brain metastasis. High CXCR4 expression levels were found in primary RCC and brain metastases (85.7% and 91.7%, respectively). CCR2 (52.1%) and CCL7 expression (75%) in cancer cells of brain metastases was more frequent compared with primary tumours (15.5% and 16.7%, respectively; P<0.0001 each). The density of CD68+ TAMs was similar in primary RCC and brain metastases. However, TAMs were more frequently CCR2-positive in brain metastases than in primary RCC (P<0.001).Conclusion:Our data demonstrate that the monocyte-specific chemokine CCL7 and its receptor CCR2 are expressed in tumour cells of RCC. We conclude that monocyte recruitment by CCR2 contributes to brain metastasis of RCC.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Renal Cancer ; Metastasis ; Cxcr4 ; Ccl7 (mcp-3) ; Ccr2 ; Tumour-associated Macrophages; Central-nervous-system; Monocyte Chemoattractant Protein-1; Chemokine Receptor Expression; Cell Carcinoma; Breast-cancer; Biological Axis; Cxcr4; Survival; Ccl2; Barrier
ISSN (print) / ISBN 0007-0920
e-ISSN 1532-1827
Journal British Journal of Cancer BJC
Quellenangaben Volume: 110, Issue: 3, Pages: 686-694 Article Number: , Supplement: ,
Publisher Nature Publishing Group
Publishing Place London
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Virology (VIRO)