Anemia in cancer patients can result from a complex interaction of numerous factors including iron deficiency, inflammation, toxicity related to therapy and effect of cancer on the marrow. Determining effective anemia treatment can therefore be complex, requiring a combination of diagnostic tests. Research on iron metabolism has highlighted the importance of hepcidin and its potential role in development of anemia of inflammation (AI). Hepcidin is a peptide that controls iron flow, is induced by inflammation and is speculated to cause the sequestration of iron in patients with inflammation. In the present study, serum hepcidin concentration determined by LC-MS/MS was shown to correlate with inflammatory markers in patients with anemia of cancer (AoC). In the absence of a widely-available serum hepcidin detection assay, detection of prohepcidin using a commercial assay has been used for several years as a surrogate for measuring serum hepcidin concentration. Analysis of prohepcidin concentration did not reveal any correlation with hepcidin or with inflammatory markers in patient samples and our data suggest that prohepcidin may not be stable in serum. Algorithms to sub-classify AoC patients showed that hepcidin was strongly associated with the population subset with inflammation and without iron deficiency. Serum hepcidin concentrations may therefore be a good predictor of AI, useful in diagnosis of anemia etiology and in treatment determination.
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