JCB logo
BD Biosciences
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published 12 November 2001. doi:10.1083/jcb.200101099
This Article
Right arrow Full Text
Right arrow PDF (Full Text)
Right arrow PPT slides of all figures
Right arrow Correction (v155,p1359)
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Mechtersheimer, S.
Right arrow Articles by Altevogt, P.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mechtersheimer, S.
Right arrow Articles by Altevogt, P.
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
© The Rockefeller University Press, 0021-9525/2001/11/661 $5.00
The Journal of Cell Biology, Volume 155, Number 4, November 12, 2001 661-674


Article

Ectodomain shedding of L1 adhesion molecule promotes cell migration by autocrine binding to integrins

Sabine Mechtersheimer1, Paul Gutwein1, Nancy Agmon-Levin1, Alexander Stoeck1, Matthias Oleszewski1, Svenja Riedle1, Rolf Postina4, Falk Fahrenholz4, Mina Fogel2, Vance Lemmon3 and Peter Altevogt1

1 Tumor Immunology Program, G0100, German Cancer Research Center, D-69120 Heidelberg, Germany
2 Department of Pathology, Kaplan Hospital, Rehovot 76100, Israel
3 Department of Neurosciences, Case Western Reserve University, Cleveland, Ohio 44106
4 Institute of Biochemistry, University of Mainz, D-55128 Mainz, Germany

Address correspondence to Peter Altevogt, Tumor Immunology Program, G0100, German Cancer Research Center, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany. Tel.: 49-6221-423-714. Fax: 49-6221-423-702. E-mail: p.altevogt{at}dkfz-heidelberg.de

The L1 adhesion molecule plays an important role in axon guidance and cell migration in the nervous system. L1 is also expressed by many human carcinomas. In addition to cell surface expression, the L1 ectodomain can be released by a metalloproteinase, but the biological function of this process is unknown. Here we demonstrate that membrane-proximal cleavage of L1 can be detected in tumors and in the developing mouse brain. The shedding of L1 involved a disintegrin and metalloproteinase (ADAM)10, as transfection with dominant-negative ADAM10 completely abolishes L1 release. L1-transfected CHO cells (L1-CHO) showed enhanced haptotactic migration on fibronectin and laminin, which was blocked by antibodies to {alpha}vß5 and L1. Migration of L1-CHO cells, but not the basal migration of CHO cells, was blocked by a metalloproteinase inhibitor, indicating a role for L1 shedding in the migration process. CHO and metalloproteinase-inhibited L1-CHO cells were stimulated to migrate by soluble L1-Fc protein. The induction of migration was blocked by {alpha}vß5-specific antibodies and required Arg-Gly-Asp sites in L1. A 150-kD L1 fragment released by plasmin could also stimulate CHO cell migration. We propose that ectodomain-released L1 promotes migration by autocrine/paracrine stimulation via {alpha}vß5. This regulatory loop could be relevant for migratory processes under physiological and pathophysiological conditions.

Key Words: L1; shedding; ADAM10; cell migration; integrins


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents