Abstract:
:Active immunization with myelin basic protein (MBP) induces experimental allergic encephalomyelitis (EAE) in a variety of animal species, including rats and mice. We have previously described the ability of the newly described mouse lambda (lambda) variable (V) region V lambda x, to confer MBP reactivity to an Ab. In this report, we have evaluated the heavy (H) chain isotype distribution of V lambda x-bearing Abs in normal mouse serum. We demonstrate a biased H chain isotype association with V lambda x light (L) chains with a skewing towards gamma 2a and 2b isotypes. The IgG2a restriction in normal mouse Igs is even more evident in V lambda x-containing Abs that bind MBP. This was confirmed by the ability of purified polyclonal IgG2a Abs to bind MBP and the finding that most or all of the IgG2a Abs that bind MBP seem to harbor a V lambda x L chain. The specificity of naturally-occurring V lambda x-bearing Abs with MBP can be localized to a particular epitope encompassing residues 25-34 of the MBP molecule. Furthermore, virtually all of the reactivity of V lambda x-containing Abs with MBP peptide 25-34 is associated with the gamma 2a isotype. Collectively, these results suggest that the interaction of V lambda x with MBP seems to be facilitated by an association with gamma 2a which may reflect preferred VH usage by this isotype. Such unique pairing of particular H chains with V lambda x L chains in Abs that bind MBP may be indicative of a new B-cell component involved in the pathogenesis of EAE.
journal_name
J Neuroimmunoljournal_title
Journal of neuroimmunologyauthors
Galin FS,Zhou SR,Whitaker JN,Blalock JEdoi
10.1016/s0165-5728(96)00072-0subject
Has Abstractpub_date
1996-10-01 00:00:00pages
15-20issue
1eissn
0165-5728issn
1872-8421pii
S0165572896000720journal_volume
70pub_type
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