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Defensin-related peptide 1 (Defr1) is allelic to Defb8 and chemoattracts immature DC and CD4(+) T cells independently of CCR6

  1. Author:
    Taylor, K.
    Rolfe, M.
    Reynolds, N.
    Kilanowski, F.
    Pathania, U.
    Clarke, D.
    Yang, D.
    Oppenheim, J.
    Samuel, K.
    Howie, S.
    Barran, P.
    MacMillan, D.
    Campopian, D.
    Dorin, J.

  2. Author Address

    Taylor, Karen, Rolfe, Mark, Reynolds, Natalie, Kilanowski, Fiona, Pathania, Uday, Dorin, Julia] Western Gen Hosp, MRC, IGMM, Human Genet Unit, Edinburgh EH4 2XU, Midlothian, Scotland. [Clarke, Dave, Barran, Perdita, Campopian, Dominic] Univ Edinburgh, Sch Chem, Edinburgh, Midlothian, Scotland. [Yang, De, Oppenheim, Joost] NCI, Mol Immunoregulat Lab, Ctr Canc Res Sci Applicat & Int Cooperat Frederic, Frederick, MD 21701 USA. [Samuel, Kay] Ctr Regenerat Med, SNBTS Cell Therapy Grp, Edinburgh, Midlothian, Scotland. [Howie, Sarah] Univ Edinburgh, MRC, Ctr Inflammat Res, Queens Med Res Inst, Edinburgh, Midlothian, Scotland. [Macmillan, Derek] UCL, Dept Chem, Christopher Ingold Labs, London, England.
    1. Year: 2009
  2. Journal: European Journal of Immunology
    1. 39
    2. 5
    3. Pages: 1353-1360
  4. Type of Article: Article
  1. Abstract:

    beta-Defensins comprise a family of cationic, antimicrobial and chemoattractant peptides. The six cysteine canonical motif is retained throughout evolution and the disulphide connectivities stabilise the conserved monomer structure. A murine beta-defensin gene (Defr1) present in the main defensin cluster of C57B1/6 mice, encodes a peptide with only five of the canonical six cysteine residues. in other inbred strains of mice, the allele encodes Defb8, which has the six cysteine motif. We show here that in common with six cysteine beta-defensins, defensin-related peptide 1 (Defr1) displays chemoattractant activity for CD4(+) T cells and immature DC (iDC), but not mature DC cells or neutrophils. Murine Defb2 replicates this pattern of attraction. Defb8 is also able to attract iDC but not mature DC. Synthetic analogues of Defr1 with the six cysteines, restored (Defr1 Y5C) or with only a single cysteine (Defr1-1c(V)) chemoattract CD4(+) T cells with reduced activity, but do not chemoattract DC. beta-Defensins have previously been shown to attract iDC through CC receptor 6 (CCR6) but neither Defr1 or its related peptides nor Defb8, chemoattract cells overexpressing CCR6. Thus, we demonstrate that the canonical six cysteines of beta-defensins are not required for the chemoattractant activity of Defr1 and that neither Defr1 nor the six cysteine polymorphic variant allele Defb8, act through CCR6.

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  2. DOI: 10.1002/eji.200838566
  3. PMID: 19404978

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