In pre-B cells, immunoglobulin mu (Ig mu) is associated with pre-B cell-specific proteins to form a multimeric complex that is found on the cell surface. One of these proteins is encoded by the three exon Ig lambda-like gene 14.1, whose expression is restricted to pre-B cells and occurs from an unrearranged gene. A comparison of the 14.1 gene structure to the seven-gene human Ig lambda locus re...

OBJECTIVE Interleukin-17 (IL-17), a potent proinflammatory cytokine, has been implicated in allograft rejection. We analyzed the efficacy of an adenoviral vector expressing an IL-17 inhibitor in delaying acute allograft rejection in a rat model of heart transplantation, and the biological mechanisms underlying the protective effect. METHODS We constructed an adenoviral vector expressing a sol...

Immunoglobulin (Ig) antigen receptors are composed of a noncovalently-associated complex of Ig and two other proteins, Igo~ and Ig3. The cytoplasmic domain of both of these Ig associated proteins contains a consensus sequence that is shared with the signaling proteins of the T cell and Fc receptor. To test the idea that Igc~-IgB heterodimers are the signaling components of the Ig receptor, we h...

We investigated the role of the immune system in the pathogenesis of amyotrophic lateral sclerosis (ALS) by studying the long-term consequences of ALS immunoglobulin (Ig) application on the levator auris muscle of the mouse. We applied Ig from seven ALS patients, four disease controls, and a pool of normal Ig (6 mg of Ig in 2 weeks) by subcutaneous injection; removed the muscles 4 to 12 weeks a...

Immunoglobulin (Ig) antigen receptors are composed of a noncovalently-associated complex of Ig and two other proteins, Igo~ and Ig3. The cytoplasmic domain of both of these Ig associated proteins contains a consensus sequence that is shared with the signaling proteins of the T cell and Fc receptor. To test the idea that Igc~-IgB heterodimers are the signaling components of the Ig receptor, we h...

Greek patients with pulmonary tuberculosis, who were studied before receiving any form of treatment, tended to have elevated immunoglobulin (Ig) levels in the IgG and IgA, but not the IgM, classes. This is in agreement with the findings of the majority of studies on immunoglobulin levels in other countries. The levels of IgA were particularly associated with the extent of disease and were signi...

Polymeric immunoglobulins provide immunological protection at mucosal surfaces to which they are specifically transported by the polymeric immunoglobulin receptor (pIgR). Using a panel of human IgA1/IgG1 constant region “domain swap” mutants, the binding site for the pIgR on dimeric IgA (dIgA) was localized to the C a 3 domain. Selection of random peptides for pIgR binding and comparison with t...

Polymeric immunoglobulins provide immunological protection at mucosal surfaces to which they are specifically transported by the polymeric immunoglobulin receptor (pIgR). Using a panel of human IgA1/IgG1 constant region "domain swap" mutants, the binding site for the pIgR on dimeric IgA (dIgA) was localized to the Calpha3 domain. Selection of random peptides for pIgR binding and comparison with...

The synthesis of intracellular J chains was found to be closely associated with that of intracellular immunoglobulin, regardless of its class, during the process of B-cell differentiation. This parallelism between the synthesis of J chain and immunoglobulin was particularly evident in their coincident appearance in serial observations of pokeweed mitogen (PWM)-stimulated lymphocytes. The intens...

Members of the immunoglobulin superfamily often play key roles in intercellular adhesion. IGSF4 is a novel immunoglobulin (Ig)-like intercellular adhesion molecule. Three Ig-like domains are included in the extracellular domain of IGSF4 and mediate homophilic or heterophilic interactions independently of Ca2+. The cytoplasmic domain of IGSF4 contains the binding motifs that connect to actin fib...