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Title
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Increased serum interleukin-8 in patients with early and metastatic breast cancer correlates with early dissemination and survival
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Author
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Abstract
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| Purpose: The prognostic significance of serum interleukin (IL)-8 was evaluated in patients with metastatic breast cancer. The predictive value of serum IL-8 for the presence of occult metastatic tumor cells in bone marrow aspirates was evaluated in patients with operable and metastatic breast cancer. Experimental Design: Serum IL-8 was measured in healthy controls, patients with operable breast cancer, and patients with untreated, progressive metastatic breast cancer. In 69 patients with either operable or advanced breast cancer, occult cytokeratin-positive cells were counted in bone marrow aspirates. Results: Serum IL-8 levels are increased in 67% (52 of 77) of patients with advanced breast cancer. Overall, these levels are significantly higher in patients with breast cancer compared with healthy volunteers (P < 0.001). The IL-8 levels increase significantly in patients with more advanced disease. An elevated serum IL-8 is related to an accelerated clinical course, a higher tumor load, and the presence of liver or lymph node involvement. A multivariate analysis indicates that serum IL-8 is an independent significant factor for postrelapse survival. There was a significant difference between serum IL-8 levels in patients with or without occult cytokeratin-positive bone marrow cells (P < 0.04). Serum IL-8 levels also showed an association with the number of these cells (P < 0.01). Conclusions: Serum IL-8 is increased in patients with breast cancer and has an independent prognostic significance for postrelapse survival. The observations on the relationship between occult cytokeratin-positive bone marrow cells corroborate the concept of IL-8 acting as a contributor to the process of tumor cell dissemination. Similarly, the relationship between serum IL-8 and nodal stage at presentation deserves further study. These results further expand the concept that inflammation and inflammatory cytokines are critical components of tumor progression. |
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Language
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English
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Source (journal)
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Clinical cancer research. - Philadelphia, Pa, 1995, currens
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Publication
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Philadelphia, Pa
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Association for Cancer Research
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2004
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ISSN
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1078-0432
[print]
1557-3265
[online]
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DOI
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10.1158/1078-0432.CCR-04-0812
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Volume/pages
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10
:21
(2004)
, p. 7157-7162
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ISI
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000224975300008
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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