, Volume 20, Issue 1, pp 1–18

Targeting leukocyte migration and adhesion in Crohn’s disease and ulcerative colitis



Crohn’s disease and ulcerative colitis are two chronic inflammatory bowel diseases. Current biologic therapies are limited to blocking tumor necrosis factor alpha. However, some patients are primary non-responders, experience a loss of response, intolerance or side effects defining the urgent unmet need for novel treatments. The rapid recruitment and inappropriate retention of leukocytes is a hallmark of chronic inflammation and a potentially promising therapeutic target. We discuss the immunological mechanisms of leukocyte homing and adhesion in the gut mucosa. The interaction of lymphocytes (CD4+ T-cells, CD8+ T-cells, TREG, TH1, TH17, B-cells), monocytes, macrophages, dendritic cells and granulocytes with endothelial and epithelial cells through integrins [α4β7 (LPAM-1), αEβ7 (HML1 Human Mucosal Lymphocyte Antigen 1), α4β1 (VLA-4), αLβ7, (LFA-1)] and their ligands immunoglobulin superfamily cellular adhesion molecules (CAM) (MAdCAM-1 Mucosal Addressin Cellular Adhesion Molecule 1, ICAM-1 Intercellular Cell Adhesion Molecule, VCAM-1 Vascular Cell Adhesion Molecule), fibronectin as well as chemokine receptors (CCR2, CCR4, CCR5, CCR7, CCR9, CCR10, CXCR3, CX3CR1) and chemokines [CCL5, CCL25 (TECK Thymus Expressed Chemokine), CCL28, CX3CL1, CXCL10, CXCL12] in the process of gut homing is critically reviewed and summarized in scientific cartoons. Moreover, we discuss the clinical trial results of approved and investigational antibodies and small molecules including natalizumab (anti-α4, Tysabri®, Antegren®), AJM300 (anti-α4), etrolizumab (anti-β7, rhuMAb-Beta7), vedolizumab (anti-α4β7, LDP-02, MLN-02, MLN0002), PF-00547659 (anti-MAdCAM), Alicaforsen (anti-ICAM-1), and CCX282-B (anti-CCR9, GSK-1605786, Traficet-EN™) and their risks such as PML reported for natalizumab. Hopefully, the newer gut specific drug designs discussed in this article will have an impact on both efficacy and safety.


Crohn’s disease Ulcerative colitis Inflammatory bowel disease IBD Immunoglobulin superfamily cellular adhesion molecules Integrins Chemokines Adhesion Migration Recruitment Leukocytes T-cells Dendritic cells 



Extracellular matrix


Inflammatory bowel disease


Ulcerative colitis


Crohn’s disease


Dendritic cell(s)




Central nervous system


Intraepithelial lymphocytes


Lamina propria


High endothelial venule

Copyright information

© Springer Basel AG 2011

Authors and Affiliations

  1. 1.Division of Gastroenterology and Hepatology, Department of Medicine, Charité Medical Center, Virchow HospitalMedical School of the Humboldt University of BerlinBerlinGermany

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