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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hilton, Douglas J. Kile, Benjamin T. de Graaf, Carolyn A. Metcalf, Donald Verhagen, Anne M. Goradia, Ankita Collinge, Janelle E. Starr, Robyn Baldwin, Tracey M. |
| Description | Country affiliation: Australia Author Affiliation: Verhagen AM ( Walter and Eliza Hall Institute, Parkville, Victoria 3052, Australia. anne.verhagen@csl.com.au) |
| Abstract | The lamin B receptor (LBR) is a highly unusual inner nuclear membrane protein with multiple functions. Reduced levels are associated with decreased neutrophil lobularity, whereas complete absence of LBR results in severe skeletal dysplasia and in utero/perinatal lethality. We describe a mouse pedigree, Lym3, with normal bone marrow and thymic development but profound and progressive lymphopenia particularly within the T cell compartment. This defect arises from a point mutation within the Lbr gene with only trace mutant protein detectable in homozygotes, albeit sufficient for normal development. Reduced T cell homeostatic proliferative potential and life span in vivo were found to contribute to lymphopenia. To investigate the role of LBR in gene silencing in hematopoietic cells, we examined gene expression in wild-type and mutant lymph node CD8 T cells and bone marrow neutrophils. Although LBR deficiency had a very mild impact on gene expression overall, for common genes differentially expressed in both LBR-deficient CD8 T cells and neutrophils, gene upregulation prevailed, supporting a role for LBR in their suppression. In summary, this study demonstrates that LBR deficiency affects not only nuclear architecture but also proliferation, cell viability, and gene expression of hematopoietic cells. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| Journal | The Journal of Immunology |
| Issue Number | 1 |
| Volume Number | 188 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2012-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cd8-positive T-lymphocytes Immunology Cell Aging Hematopoietic Stem Cells Lymphopenia Point Mutation Receptors, Cytoplasmic And Nuclear Animals Pathology Genetics Cell Proliferation Cell Survival Gene Expression Regulation Mice Mice, Knockout Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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