IL-6, but not TNF-α, increases plasma YKL-40 in human subjects

Anders R Nielsen, Peter Plomgaard, Karen S Krabbe, Julia S Johansen, Bente K Pedersen

    64 Citations (Scopus)

    Abstract

    Plasma levels of YKL-40 are elevated in patients with systemic infection, inflammatory disorders and cancer. Both monocytes/macrophages, neutrophils, and cancer cells have the capacity to produce YKL-40, but the regulation during the inflammatory response is unknown. To study the possible role of interleukin-6 (IL-6) and tumor necrosis factor (TNF)-α in the regulation of YKL-40 plasma levels, we included healthy men, who received either recombinant human (rh)IL-6 (n=6), rhTNF-α (n=8) or vehicle (n=7) for 3. h. The plasma levels of IL-6 and TNF-α reached ~150 and ~18. pg/ml, respectively, during the infusions. Following the IL-6 infusion, the plasma level of YKL-40 increased from ~30 to ~57. ng/ml (p<0.05) at 24. h, and returned to normal values after 48. h. The plasma level of YKL-40 did not change during TNF-α infusion or infusion of vehicle. These data demonstrate that IL-6, but not TNF-α, has a key-role in the regulation of plasma YKL-40 levels during inflammation.

    Original languageEnglish
    JournalCytokine
    Volume55
    Issue number1
    Pages (from-to)152-5
    Number of pages4
    ISSN1043-4666
    DOIs
    Publication statusPublished - Jul 2011

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