Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organs
<p>Abstract</p> <p>Background</p> <p>There are three major B-cell compartments in peripheral lymphoid organs: the germinal center (GC), the mantle zone (MNZ) and the marginal zone (MGZ). Unique sets of B-cells reside in these compartments, and they have specific functio...
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2004-09-01
|
| Series: | BMC Immunology |
| Online Access: | http://www.biomedcentral.com/1471-2172/5/20 |
| _version_ | 1811267165707304960 |
|---|---|
| author | Delabie Jan Eudy James D Zhou Guimei Dybkaer Karen Sherman Simon Staudt Louis M Rosenwald Andreas Lynch Ryan C Xiao Li Iqbal Javeed Shen Yulei McKeithan Timothy W Chan Wing C |
| author_facet | Delabie Jan Eudy James D Zhou Guimei Dybkaer Karen Sherman Simon Staudt Louis M Rosenwald Andreas Lynch Ryan C Xiao Li Iqbal Javeed Shen Yulei McKeithan Timothy W Chan Wing C |
| author_sort | Delabie Jan |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>There are three major B-cell compartments in peripheral lymphoid organs: the germinal center (GC), the mantle zone (MNZ) and the marginal zone (MGZ). Unique sets of B-cells reside in these compartments, and they have specific functional roles in humoral immune response. MNZ B cells are naïve cells in a quiescent state and may participate in GC reactions upon proper stimulation. The adult splenic MGZ contains mostly memory B cells and is also known to provide a rapid response to particulate antigens. The GC B-cells proliferate rapidly and undergo selection and affinity maturation. The B-cell maturational process is accompanied by changes in the expression of cell-surface and intracellular proteins and requires signals from the specialized microenvironments.</p> <p>Results</p> <p>We performed laser microdissection of the three compartments for gene expression profiling by cDNA microarray. The transcriptional program of the GC was dominated by upregulation of genes associated with proliferation and DNA repair or recombination. The MNZ and MGZ showed increased expression of genes promoting cellular quiescence. The three compartments also revealed distinct repertoires of apoptosis-associated genes, chemokines and chemokine receptors. The MNZ and GC showed upregulation of <it>CCL20 </it>and <it>CCL18 </it>respectively. The MGZ was characterized by high expression of many chemokines genes e.g. <it>CXCL12</it>, <it>CCL3</it>, <it>CCL14 </it>and IFN-associated genes, consistent with its role in rapid response to infections. A stromal signature was identified including genes associated with macrophages or with synthesis of extracellular matrix and genes that influenced lymphocyte migration and survival. Differentially expressed genes that did not belong to the above categories include the well characterized <it>BCL6 </it>and <it>CD10 </it>and many others whose function is not known.</p> <p>Conclusions</p> <p>Transcriptional profiling of B-cell compartments has identified groups of genes involved in critical molecular and cellular events that affect proliferation, survival migration, and differentiation of the cells. The gene expression study of normal B-cell compartments may additionally contribute to our understanding of the molecular abnormalities of the corresponding lymphoid tumors.</p> |
| first_indexed | 2024-04-12T20:57:35Z |
| format | Article |
| id | doaj.art-f3a90970a8be4913baf5f4658764149c |
| institution | Directory Open Access Journal |
| issn | 1471-2172 |
| language | English |
| last_indexed | 2024-04-12T20:57:35Z |
| publishDate | 2004-09-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Immunology |
| spelling | doaj.art-f3a90970a8be4913baf5f4658764149c2022-12-22T03:16:57ZengBMCBMC Immunology1471-21722004-09-01512010.1186/1471-2172-5-20Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organsDelabie JanEudy James DZhou GuimeiDybkaer KarenSherman SimonStaudt Louis MRosenwald AndreasLynch Ryan CXiao LiIqbal JaveedShen YuleiMcKeithan Timothy WChan Wing C<p>Abstract</p> <p>Background</p> <p>There are three major B-cell compartments in peripheral lymphoid organs: the germinal center (GC), the mantle zone (MNZ) and the marginal zone (MGZ). Unique sets of B-cells reside in these compartments, and they have specific functional roles in humoral immune response. MNZ B cells are naïve cells in a quiescent state and may participate in GC reactions upon proper stimulation. The adult splenic MGZ contains mostly memory B cells and is also known to provide a rapid response to particulate antigens. The GC B-cells proliferate rapidly and undergo selection and affinity maturation. The B-cell maturational process is accompanied by changes in the expression of cell-surface and intracellular proteins and requires signals from the specialized microenvironments.</p> <p>Results</p> <p>We performed laser microdissection of the three compartments for gene expression profiling by cDNA microarray. The transcriptional program of the GC was dominated by upregulation of genes associated with proliferation and DNA repair or recombination. The MNZ and MGZ showed increased expression of genes promoting cellular quiescence. The three compartments also revealed distinct repertoires of apoptosis-associated genes, chemokines and chemokine receptors. The MNZ and GC showed upregulation of <it>CCL20 </it>and <it>CCL18 </it>respectively. The MGZ was characterized by high expression of many chemokines genes e.g. <it>CXCL12</it>, <it>CCL3</it>, <it>CCL14 </it>and IFN-associated genes, consistent with its role in rapid response to infections. A stromal signature was identified including genes associated with macrophages or with synthesis of extracellular matrix and genes that influenced lymphocyte migration and survival. Differentially expressed genes that did not belong to the above categories include the well characterized <it>BCL6 </it>and <it>CD10 </it>and many others whose function is not known.</p> <p>Conclusions</p> <p>Transcriptional profiling of B-cell compartments has identified groups of genes involved in critical molecular and cellular events that affect proliferation, survival migration, and differentiation of the cells. The gene expression study of normal B-cell compartments may additionally contribute to our understanding of the molecular abnormalities of the corresponding lymphoid tumors.</p>http://www.biomedcentral.com/1471-2172/5/20 |
| spellingShingle | Delabie Jan Eudy James D Zhou Guimei Dybkaer Karen Sherman Simon Staudt Louis M Rosenwald Andreas Lynch Ryan C Xiao Li Iqbal Javeed Shen Yulei McKeithan Timothy W Chan Wing C Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organs BMC Immunology |
| title | Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organs |
| title_full | Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organs |
| title_fullStr | Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organs |
| title_full_unstemmed | Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organs |
| title_short | Distinct gene expression profiles in different B-cell compartments in human peripheral lymphoid organs |
| title_sort | distinct gene expression profiles in different b cell compartments in human peripheral lymphoid organs |
| url | http://www.biomedcentral.com/1471-2172/5/20 |
| work_keys_str_mv | AT delabiejan distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT eudyjamesd distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT zhouguimei distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT dybkaerkaren distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT shermansimon distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT staudtlouism distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT rosenwaldandreas distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT lynchryanc distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT xiaoli distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT iqbaljaveed distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT shenyulei distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT mckeithantimothyw distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans AT chanwingc distinctgeneexpressionprofilesindifferentbcellcompartmentsinhumanperipherallymphoidorgans |