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Activation-dependent modulation of B lymphocyte migration to chemokines

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2000

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Brandes, Marlene
Spoerri, Bernhard
Schaerli, Patrick
Moser, Bernhard

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International immunology. 2000, 12(9), pp. 1285-1292. ISSN 0953-8178. eISSN 1460-2377. Available under: doi: 10.1093/intimm/12.9.1285

Zusammenfassung

In this study we have examined the migration responses of human peripheral blood or tonsillar B lymphocytes to a selection of 27 chemokines. Freshly isolated (CD19(+)) B lymphocytes show greatly impaired in vitro chemotaxis which is overcome by overnight culture. The best responses of cultured B lymphocytes were observed with BCA-1, SLC, ELC and SDF-1, reaching 19-26% of total input cells that have migrated, followed by LARC and TECK with 5-10% of migrated cells, whereas no other chemokine was found to be active. Stimulation of B lymphocytes with lipopolysaccharide or anti-CD40 plus IL-4 resulted in marked enhancement of the migration response to BCA-1, SLC, ELC and SDF-1, reaching 30-60% migrated cells at 12 or 36 h of culture respectively. The activation-dependent increase in the migration efficacy was transient and declined to base level responses after 72 h of culture. Under no circumstances did we detect B lymphocyte chemotaxis to inflammatory chemokines. Also, mobilization of intracellular calcium (Ca(2+)), an otherwise typical response of leukocytes to chemokines, was not observed. The transient increase in B lymphocyte migration did not correlate with changes in chemokine receptor expression, as evidenced by cell surface staining with antibodies to CXCR4, CXCR5 and CCR6, and by receptor transcript analyses. BCA-1, SLC, ELC and SDF-1 are typical 'housekeeping' chemokines with prominent expression at discrete locations in lymphoid tissues. Modulation of migration to these chemokines may be a critical mechanism for the proper positioning of B lymphocytes during humoral responses in secondary lymphoid tissues.

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570 Biowissenschaften, Biologie

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ISO 690BRANDES, Marlene, Daniel F. LEGLER, Bernhard SPOERRI, Patrick SCHAERLI, Bernhard MOSER, 2000. Activation-dependent modulation of B lymphocyte migration to chemokines. In: International immunology. 2000, 12(9), pp. 1285-1292. ISSN 0953-8178. eISSN 1460-2377. Available under: doi: 10.1093/intimm/12.9.1285
BibTex
@article{Brandes2000Activ-36726,
  year={2000},
  doi={10.1093/intimm/12.9.1285},
  title={Activation-dependent modulation of B lymphocyte migration to chemokines},
  number={9},
  volume={12},
  issn={0953-8178},
  journal={International immunology},
  pages={1285--1292},
  author={Brandes, Marlene and Legler, Daniel F. and Spoerri, Bernhard and Schaerli, Patrick and Moser, Bernhard}
}
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    <dcterms:abstract xml:lang="eng">In this study we have examined the migration responses of human peripheral blood or tonsillar B lymphocytes to a selection of 27 chemokines. Freshly isolated (CD19(+)) B lymphocytes show greatly impaired in vitro chemotaxis which is overcome by overnight culture. The best responses of cultured B lymphocytes were observed with BCA-1, SLC, ELC and SDF-1, reaching 19-26% of total input cells that have migrated, followed by LARC and TECK with 5-10% of migrated cells, whereas no other chemokine was found to be active. Stimulation of B lymphocytes with lipopolysaccharide or anti-CD40 plus IL-4 resulted in marked enhancement of the migration response to BCA-1, SLC, ELC and SDF-1, reaching 30-60% migrated cells at 12 or 36 h of culture respectively. The activation-dependent increase in the migration efficacy was transient and declined to base level responses after 72 h of culture. Under no circumstances did we detect B lymphocyte chemotaxis to inflammatory chemokines. Also, mobilization of intracellular calcium ([Ca(2+)](i)), an otherwise typical response of leukocytes to chemokines, was not observed. The transient increase in B lymphocyte migration did not correlate with changes in chemokine receptor expression, as evidenced by cell surface staining with antibodies to CXCR4, CXCR5 and CCR6, and by receptor transcript analyses. BCA-1, SLC, ELC and SDF-1 are typical 'housekeeping' chemokines with prominent expression at discrete locations in lymphoid tissues. Modulation of migration to these chemokines may be a critical mechanism for the proper positioning of B lymphocytes during humoral responses in secondary lymphoid tissues.</dcterms:abstract>
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