Predominant role of α4-integrins for distinct steps of lymphoma metastasis

Uwe Gosslar*, Petra Jonas, Arne Luz, Alexandra Lifka, David Naor, Alf Hamann, Bernhard Holzmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

To analyze the role of α4-integrins in lymphoma metastasis, sublines of the T-cell lymphoma LB were generated by retrovirus-mediated gene transfer that differ exclusively in the expression of α4-integrins. Using LB-α4 and control LB-NTK cells, we demonstrate that expression of α4-integrins strongly suppresses metastasis formation of LB lymphoma cells in secondary lymphoid organs such as spleen, mesenteric and peripheral lymph nodes, or Peyer's patches after i.v. injection into syngeneic BALB/c mice. Moreover, α4-integrin expression inhibited development of metastatic tumors in liver, lung, and kidney. Expansion of LB lymphoma cells in bone marrow was not affected by α4-integrin expression. In vivo migration assays using 51Cr- labeled lymphoma cells demonstrated that low-metastatic LB-α4 cells accumulated with the same efficiency as high-metastatic LB-NTK cells in all target organs examined and were even enriched in mucosal lymphoid organs. Collectively, these results indicate that α4-integrins inhibit metastasis formation of lymphoma cells at a stage subsequent to the invasion of target organs.

Original languageEnglish
Pages (from-to)4821-4826
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume93
Issue number10
DOIs
StatePublished - 14 May 1996

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