Characterization of an Anti-Decorin Monoclonal Antibody, and Its Utility

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Abstract

6B6 is a monoclonal antibody raised against a purified small dermatan sulfate proteoglycan from human ovarian fibroma capsule. Although it has been widely used as an anti-decorin monoclonal antibody, its epitope has not yet been characterized at the molecular level. Here, we show that 6B6 is specific to decorin. The antibody recognized human, mouse, and bovine decorin core protein, but not biglycan. Using recombinant decorin domains, we determined that the epitope lies within the region of amino acid residues 50-65, termed the cysteine cluster region. Cross-reactivity among species further narrowed it down to a primary sequence of residues 57-65. We also established the conditions for immunostaining. 6B6 stained both frozen and fixed sections. Whereas the glycosaminoglycan chain of decorin inhibited access of the antibody in immunoblotting, pretreatment of tissue sections with chondrotinase ABC did not affect the intensity of staining, suggesting that the glycosanunoglycan chain is integrated and the Cys cluster region oriented outside of the collagen fibrils in the tissue. When 6B6 was applied to enzyme-linked immunosorbent assay, a concentration as low as 0.5μg/ml of decorin was detectable by either direct or sandwich ELISA. 6B6 is thus a sensitive and reliable antibody to study functions of decorin from various aspects.

Journal

  • The Journal of Biochemistry

    The Journal of Biochemistry 132(6), 997-1002, 2002-12-01

    The Japanese Biochemical Society

References:  33

Cited by:  1

Codes

  • NII Article ID (NAID)
    10010654494
  • NII NACSIS-CAT ID (NCID)
    AA00694073
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    0021924X
  • NDL Article ID
    6395369
  • NDL Source Classification
    ZR2(科学技術--生物学--生化学)
  • NDL Call No.
    Z53-B472
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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