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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zemlin, Michael Zhuang, Yingxin Kobayashi, Ryoki Fujihashi, Kohtaro Rajewsky, Klaus Gartland, G. Larry Schelonka, Robert L. Szalai, Alex Ippolito, Gregory C. Schroeder, Harry W. |
| Description | Country affiliation: United States Author Affiliation: Schelonka RL ( Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA.) |
| Abstract | All jawed vertebrates limit use of D(H) reading frames (RFs) that are enriched for hydrophobic amino acids. In BALB/c mice, DFL16.1 RF2 encodes valine and isoleucine. To test whether increased use of RF2 affects B cell function, we examined B cell development and Ab production in mice with an IgH allele (DeltaD-DmicroFS) limited to use of a single, frameshifted DFL61.1 gene segment. We compared the results of these studies to wild-type mice, as well as those previously obtained in mice limited to use of either a single normal D(H) or a single inverted D(H) that forces use of arginine in CDR-H3. All three of the mouse strains limited to a single D(H) produced fewer immature B cells than wild type. However, whereas mice limited to a single normal D(H) achieved normal B cell numbers in the periphery, mice forced to preferentially use RF2 had reduced numbers of mature B cells in the spleen and bone marrow, mirroring the pattern previously observed in mice enriched for charged CDR-H3s. There were two exceptions. B cells in the mice using RF2 normally populated the marginal zone and peritoneal cavity, whereas mice using inverted RF1 had increased numbers of marginal zone B cells and decreased numbers of B1a cells. When challenged with several T-dependent or T-independent Ags, Ag-specific Ab titers in the mice forced to use RF2 were altered. These findings indicate that B cell development and Ag-specific Ab production can be heavily influenced by the global amino acid content of the CDR-H3 repertoire. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 181 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2008-12-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antibody Diversity Genetics B-lymphocyte Subsets Immunology Pathology Cell Differentiation Epitopes, B-lymphocyte Gene Rearrangement, B-lymphocyte, Heavy Chain Immunoglobulin Heavy Chains Biosynthesis Reading Frames Animals Metabolism Complementarity Determining Regions Frameshift Mutation Mice Mice, Inbred Balb C Mice, Mutant Strains Comparative Study Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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