Most patients with N-methyl D-aspartate-receptor antibody encephalitis develop seizures but the epileptogenicity of the antibodies has not been investigated in vivo. Wireless electroencephalogram transmitters were implanted into 23 C57BL/6 mice before left lateral ventricle injection of antibody-positive (test) or healthy (control) immunoglobulin G. Mice were challenged 48 h later with a subthr...

The immune system protects us from foreign substances or pathogens by generating specific antibodies. The variety of immunoglobulin (Ig) paratopes for antigen recognition is a result of the V(D)J rearrangement mechanism, while a fast and efficient immune response is mediated by specific immunoglobulin isotypes obtained through class switch recombination (CSR). To get a better understanding on h...

We have previously shown that invariant Vα19-Jα33 TCR(+) (Vα19i T) cells suppress the disease progress in some models for organ specific autoimmune diseases and type IV allergy that deteriorate along with decline to excess in Th1- or Th17- immunity. In this study, we examined the effects of over-generation of Vα19i T cells on the Th2-controlled immunoglobulin isotype production in the models fo...

The present studies were designed to determine the effect of papain upon IgM and IgD on the surface of murine splenocytes. By using radioiodinated cells, it was shown that IgD is more susceptible to cleavage by papain than IgM. The difference in susceptibility to papain of the two isotypes was not observed when cell lysates were employed, suggesting that attachment to the plasma membrane affect...

Studies presented here show that perinatal exposure to anti-IgD allotype antibodies induces a persistant IgG-allotype suppression in the mouse that differs markedly from either the short-term or chronic allotype suppressions induced by antibodies to IgG or IgM allotypes. This novel form of allotype suppression induced by injecting neonatal BALB/c x SJL mice with monoclonal antibody to the pater...

Conjunctival plasmacytomas are rare tumours that may be solitary or related with multiple myeloma (MM), a malignant systemic plasma cell neoplasm tends to metastasize. Plasma infiltration of bone marrow and presence immunoglobulin is characteristic MM. It cause extraskeletal spread being the ocular tissue involvement very rare. We report case 57-year-old male patient affected caruncular mass ha...

The process of V(D)J recombination is crucial for regulating the development of B cells and for determining their eventual antigen specificity. Here we assess the developmental regulation of the V(D)J recombinase directly, by monitoring the double-stranded DNA breaks produced in the process of V(D)J recombination. This analysis provides a measure of recombinase activity at immunoglobulin heavy ...

B lymphocytes from patients with X chromosome-linked immunoglobulin deficiency with normal or elevated serum IgM are unable to switch from the synthesis of IgM/IgD to that of other immunoglobulin isotypes. Isotype switch recombination was evaluated in three affected males by examining interleukin 4-driven IgE synthesis. T-cell-dependent IgE synthesis was completely absent in the B lymphocytes o...

IgD, previously thought to be a recent addition to the immunoglobulin classes, has long been considered an enigmatic molecule. For example, it was debated if IgD had a specific function other than as an antigen receptor co-expressed with IgM on naive B cells and if it had an important role in mammalian immunity. However, during the past decade extensive sequencing of vertebrate genomes has show...