Preferential locomotion of leukemic cells towards laminin isoforms 8 and 10

Paola Spessotto, Anna Gronkowska, Rainer Deutzmann, Roberto Perris, Alfonso Colombatti

Research output: Contribution to journalArticlepeer-review


To identify the laminin isoforms of the basement membranes that could be implicated in the extravasation process of neoplastic lymphocytes, a number of purified laminins and one native renal laminin complex were comparatively investigated for their ability to promote migration of neoplastic lymphocytes in vitro. The identity/composition of a human placental laminin complex was asserted by combining immunochemical assays, sequence determination of tryptic peptides, and ultrastructural analysis to be composed predominantly of laminin-10 in which the coiled-coil C-terminal regions and the G globular domain of the α5 chain were preserved intact despite the enzymatic treatment used for its isolation. Lymphoma and leukemic cell lines failed to migrate towards laminin-4, -9, -11, moved poorly in response to laminin-1, -2/4, -5 and the renal laminin complex, but markedly locomoted towards the subendothelial laminin-8 and -10. The motility-promoting interaction with these latter laminins was interchangeably mediated by the α3β1 and α6β1 integrins. Lymphocyte locomotion on laminins assayed in the presence of cytokines was either reduced or enhanced suggesting that local cytokine milieu could further influence motility response.

Original languageEnglish
Pages (from-to)351-361
Number of pages11
JournalMatrix Biology
Issue number4
Publication statusPublished - Jun 2003


  • Laminin isoforms
  • Leukemic cell
  • Lymphocyte

ASJC Scopus subject areas

  • Molecular Biology


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