PMID- 2423594 OWN - NLM STAT- MEDLINE DCOM- 19860707 LR - 20061115 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 136 IP - 12 DP - 1986 Jun 15 TI - The expression of the sIgD isotype in wild-derived mice. PG - 4432-7 AB - IgD and IgM are concomitantly expressed on the surface of most mouse B lymphocytes and both molecules serve as receptor for antigen. In this communication we report that in contrast to IgM, which is expressed in a constant manner on the surface of spleen B lymphocytes of different laboratory and wild-derived mice, IgD expression is variable among the spleen cells of wild-derived mice. SPE, SEI, and SFM mice belonging to the Mus 3 subgroup show a fluorescence profile characterized by a marked diminution in the population of B lymphocytes expressing the IgD isotype; in addition, these cells have a low sIgD density on their membranes. These findings were confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of the iodinated membrane proteins. Polyclonal in vitro activation with lipopolysaccharide increases the frequency of surface IgD (sIgD)-bearing spleen cells and sIgD density in the SPE strain but decreases both the frequency and the density of IgD bearing cells in the BALB/c strain. This result suggests that delta gene expression is regulated differently in SPE and BALB/c mice. In addition, genetic analysis of sIgD expression in (BALB/c X SPE)F1 hybrids suggests that the proportion of sIgD-bearing cells and sIgD density are independently regulated. FAU - Mami, F AU - Mami F FAU - Guenet, J L AU - Guenet JL FAU - Perret, R AU - Perret R FAU - Truffa-Bachi, P AU - Truffa-Bachi P LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Epitopes) RN - 0 (Immunoglobulin Allotypes) RN - 0 (Immunoglobulin D) RN - 0 (Lipopolysaccharides) RN - 0 (Receptors, Antigen, B-Cell) RN - 0 (TNP-ficoll) RN - 0 (Trinitrobenzenes) RN - 25702-74-3 (Ficoll) SB - IM MH - Animal Population Groups/*immunology MH - Animals MH - Animals, Wild/*immunology MH - Epitopes/analysis MH - Ficoll/analogs & derivatives/immunology MH - Immunoglobulin Allotypes/*analysis/genetics MH - Immunoglobulin D/*analysis/genetics MH - Leukocyte Count MH - Lipopolysaccharides/pharmacology MH - Lymphocyte Activation MH - Lymphocytes/immunology MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred CBA MH - Receptors, Antigen, B-Cell/*analysis/genetics MH - Species Specificity MH - Spleen MH - Trinitrobenzenes/immunology EDAT- 1986/06/15 00:00 MHDA- 1986/06/15 00:01 CRDT- 1986/06/15 00:00 PHST- 1986/06/15 00:00 [pubmed] PHST- 1986/06/15 00:01 [medline] PHST- 1986/06/15 00:00 [entrez] PST - ppublish SO - J Immunol. 1986 Jun 15;136(12):4432-7.