The Journal of Experimental Medicine
Keystone Symposia
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published 29 October 2001. doi:10.1084/jem.194.9.1243
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow PPT slides of all figures
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 JEM
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 Gurish, M. F.
Right arrow Articles by Austen, K. F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gurish, M. F.
Right arrow Articles by Austen, K. F.
Right arrowPubmed/NCBI databases
*Gene*GEO Profiles
*HomoloGene*UniGene
*Substance via MeSH
Medline Plus Health Information
*Stem Cells
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?
© Rockefeller University Press, 0022-1007/2001/11/1243/ $5.00
The Journal of Experimental Medicine, Volume 194, Number 9, November 5, 2001 1243-1252


Original Article

Intestinal Mast Cell Progenitors Require CD49dß7 ({alpha}4ß7 Integrin) for Tissue-specific Homing

Michael F. Gurish1,3, Hong Tao1,3, J. Pablo Abonia1,3, Anu Arya1,3, Daniel S. Friend2,4, Christina M. Parker1,3 and K. Frank Austen1,3

1 Department of Medicine, Harvard Medical School, Boston, MA 02115
2 Department of Pathology, Harvard Medical School, Boston, MA 02115
3 Division of Rheumatology, Immunology and Allergy
4 Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115

Address correspondence to Dr. M.F. Gurish, Smith Research Building, Room 616, One Jimmy Fund Way, Harvard Medical School, Boston, MA 02115. Phone: 617-525-1235; Fax: 617-525-1310; E-mail: mgurish{at}rics.bwh.harvard.edu

Mast cells (MCs) are centrally important in allergic inflammation of the airways, as well as in the intestinal immune response to helminth infection. A single lineage of bone marrow (BM)-derived progenitors emigrates from the circulation and matures into phenotypically distinct MCs in different tissues. Because the mechanisms of MC progenitor (MCp) homing to peripheral tissues have not been evaluated, we used limiting dilution analysis to measure the concentration of MCp in various tissues of mice deficient for candidate homing molecules. MCp were almost completely absent in the small intestine but were present in the lung, spleen, BM, and large intestine of ß7 integrin-deficient mice (on the C57BL/6 background), indicating that a ß7 integrin is critical for homing of these cells to the small intestine. MCp concentrations were not altered in the tissues of mice deficient in the {alpha}E integrin (CD103), the ß2 integrin (CD18), or the recombination activating gene (RAG)-2 gene either alone or in combination with the interleukin (IL)-receptor common {gamma} chain. Therefore, it is the {alpha}4ß7 integrin and not the {alpha}Eß7 integrin that is critical, and lymphocytes and natural killer cells play no role in directing MCp migration under basal conditions. When MCp in BALB/c mice were eliminated with sublethal doses of {gamma}-radiation and then reconstituted with syngeneic BM, the administration of anti-{alpha}4ß7 integrin, anti-{alpha}4 integrin, anti-ß7 integrin, or anti–MAdCAM-1 monoclonal antibodies (mAbs) blocked the recovery of MCp in the small intestine. The blocking mAbs could be administered as late as 4 d after BM reconstitution with optimal inhibition, implying that the MCp must arise first in the BM, circulate in the vasculature, and then translocate into the intestine. Inasmuch as MCp are preserved in the lungs of ß7 integrin-deficient and anti-{alpha}4ß7 integrin-treated mice but not in the small intestine, {alpha}4ß7 integrin is critical for tissue specific extravasation for localization of MCp in the small intestine, but not the lungs.

Key Words: {alpha}E/CD103 integrin • ß2/CD18 integrin • c-kit • stem cell factor • MAdCAM-1


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