Abstract
Although critical for cell adhesion and migration during normal immune-mediated reactions, leukocyte integrins are also involved in the pathogenesis of diverse clinical conditions including autoimmune diseases and chronic inflammation. Leukocyte integrins therefore have been targets for anti-adhesive therapies to treat the inflammatory disorders. Recently, the therapeutic potential of integrin antagonists has been demonstrated in psoriasis and multiple sclerosis. However, current therapeutics broadly affect integrin functions and, thus, yield unfavorable side effects. This review discusses the major leukocyte integrins and the anti-adhesion strategies for treating immune diseases.
Similar content being viewed by others
References
Springer TA. Traffic signals for lymphocyte recirculation and leukocyte emigration: the multi-step paradigm. Cell. 1994;76:301–14.
Shimaoka M, Springer TA. Therapeutic antagonists and the conformational regulation of integrin structure and function. Nat Rev Drug Discov. 2003;2:703–16.
Grakoui A, Bromley SK, Sumen C, Davis MM, Shaw AS, Allen PM, et al. The immunological synapse: a molecular machine controlling T cell activation. Science. 1999;285:221–7.
Ulyanova T, Priestley GV, Banerjee ER, Papayannopoulou T. Unique and redundant roles of alpha4 and beta2 integrins in kinetics of recruitment of lymphoid vs myeloid cell subsets to the inflamed peritoneum revealed by studies of genetically deficient mice. Exp Hematol. 2007;35:1256–65.
Ghosh S, Chackerian AA, Parker CM, Ballantyne CM, Behar SM. The LFA-1 adhesion molecule is required for protective immunity during pulmonary Mycobacterium tuberculosis infection. J Immunol. 2006;176:4914–22.
Marlin SD, Springer TA. Purified intercellular adhesion molecule-1 (ICAM-1) is a ligand for lymphocyte function-associated antigen 1 (LFA-1). Cell. 1987;51:813–9.
de Fougerolles AR, Stacker SA, Schwarting R, Springer TA. Characterization of ICAM-2 and evidence for a third counter-receptor for LFA-1. J Exp Med. 1991;174:253–67.
de Fougerolles AR, Qin X, Springer TA. Characterization of the function of ICAM-3 and comparison to ICAM-1 and ICAM-2 in immune responses. J Exp Med. 1994;179:619–29.
Tian L, Kilgannon P, Yoshihara Y, Mori K, Gallatin WM, Carpen O, et al. Binding of T lymphocytes to hippocampal neurons through ICAM-5 (telencephalin) and characterization of its interaction with the leukocyte integrin CD11a/CD18. Eur J Immunol. 2000;30:810–8.
Ihanus E, Uotila L, Toivanen A, Stefanidakis M, Bailly P, Cartron JP, et al. Characterization of ICAM-4 binding to the I domains of the CD11a/CD18 and CD11b/CD18 leukocyte integrins. Eur J Biochem. 2003;270:1710–23.
Ostermann G, Weber KS, Zernecke A, Schroder A, Weber C. JAM-1 is a ligand of the beta(2) integrin LFA-1 involved in transendothelial migration of leukocytes. Nat Immunol. 2002;3:151–8.
Wang J, Springer TA. Structural specializations of immunoglobulin superfamily members for adhesion to integrins and viruses. Immunol Rev. 1998;163:197–215.
Shimaoka M, Xiao T, Liu J-H, Yang Y, Dong Y, Jun C-D, et al. Structures of the αL I domain and its complex with ICAM-1 reveal a shape-shifting pathway for integrin regulation. Cell. 2003;112:99–111.
van Seventer G, Shimizu Y, Horgan K, Shaw S. The LFA-1 ligand ICAM-1 provides an important costimulatory signal for T cell receptor-mediated activation of resting T cells. J Immunol. 1990;144:4579–86.
Mallinson G, Martin PG, Anstee DJ, Tanner MJ, Merry AH, Tills D, et al. Identification and partial characterization of the human erythrocyte membrane component(s) that express the antigens of the LW blood-group system. Biochem J. 1986;234:649–52.
Katagiri K, Hattori M, Minato N, Irie S, Takatsu K, Kinashi T. Rap1 is a potent activation signal for leukocyte function-associated antigen 1 distinct from protein kinase C and phosphatidylinositol-3-OH kinase. Mol Cell Biol. 2000;20:1956–69.
Kawasaki H, Springett GM, Toki S, Canales JJ, Harlan P, Blumenstiel JP, et al. A Rap guanine nucleotide exchange factor enriched highly in the basal ganglia. Proc Natl Acad Sci USA. 1998;95:13278–83.
Crittenden JR, Bergmeier W, Zhang Y, Piffath CL, Liang Y, Wagner DD, et al. CalDAG-GEFI integrates signaling for platelet aggregation and thrombus formation. Nat Med. 2004;10:982–6.
Ghandour H, Cullere X, Alvarez A, Luscinskas FW, Mayadas TN. Essential role for Rap1 GTPase and its guanine exchange factor CalDAG-GEFI in LFA-1 but not VLA-4 integrin mediated human T-cell adhesion. Blood. 2007;110:3682–90.
Pasvolsky R, Feigelson SW, Kilic SS, Simon AJ, Tal-Lapidot G, Grabovsky V, et al. A LAD-III syndrome is associated with defective expression of the Rap-1 activator CalDAG-GEFI in lymphocytes, neutrophils, and platelets. J Exp Med. 2007;204:1571–82.
Kinashi T, Katagiri K. Regulation of lymphocyte adhesion and migration by the small GTPase Rap1 and its effector molecule, RAPL. Immunol Lett. 2004;93:1–5.
Katagiri K, Imamura M, Kinashi T. Spatiotemporal regulation of the kinase Mst1 by binding protein RAPL is critical for lymphocyte polarity and adhesion. Nat Immunol. 2006;7:919–28.
Katagiri K, Maeda A, Shimonaka M, Kinashi T. RAPL, a novel Rap1-binding molecule, mediates Rap1-induced adhesion through spatial regulation of LFA-1. Nat Immunol. 2003;4:741–8.
Katagiri K, Ohnishi N, Kabashima K, Iyoda T, Takeda N, Shinkai Y, et al. Crucial functions of the Rap1 effector molecule RAPL in lymphocyte and dendritic cell trafficking. Nat Immunol. 2004;5:1045–51.
Lafuente EM, van Puijenbroek AA, Krause M, Carman CV, Freeman GJ, Berezovskaya A, et al. RIAM, an Ena/VASP and Profilin ligand, interacts with Rap1-GTP and mediates Rap1-induced adhesion. Dev Cell. 2004;7:585–95.
Rose DM, Alon R, Ginsberg MH. Integrin modulation and signaling in leukocyte adhesion and migration. Immunol Rev. 2007;218:126–34.
Li X, Bu X, Lu B, Avraham H, Flavell RA, Lim B. The hematopoiesis-specific GTP-binding protein RhoH is GTPase deficient and modulates activities of other Rho GTPases by an inhibitory function. Mol Cell Biol. 2002;22:1158–71.
Cherry LK, Li X, Schwab P, Lim B, Klickstein LB. RhoH is required to maintain the integrin LFA-1 in a nonadhesive state on lymphocytes. Nat Immunol. 2004;5:961–7.
Bianchi E, Denti S, Granata A, Bossi G, Geginat J, Villa A, et al. Integrin LFA-1 interacts with the transcriptional co-activator JAB1 to modulate AP-1 activity. Nature. 2000;404:617–21.
Kolanus W, Nagel W, Schiller B, Zeitlmann L, Godar S, Stockinger H, et al. αLβ2 integrin/LFA-1 binding to ICAM-1 induced by cytohesin-1, a cytoplasmic regulatory molecule. Cell. 1996;86:233–42.
Weber KS, Weber C, Ostermann G, Dierks H, Nagel W, Kolanus W. Cytohesin-1 is a dynamic regulator of distinct LFA-1 functions in leukocyte arrest and transmigration triggered by chemokines. Curr Biol. 2001;11:1969–74.
Mor A, Dustin ML, Philips MR. Small GTPases and LFA-1 reciprocally modulate adhesion and signaling. Immunol Rev. 2007;218:114–25.
Perez OD, Mitchell D, Jager GC, South S, Murriel C, McBride J, et al. Leukocyte functional antigen 1 lowers T cell activation thresholds and signaling through cytohesin-1 and Jun-activating binding protein 1. Nat Immunol. 2003;4:1083–92.
Bresnick AR. Molecular mechanisms of nonmuscle myosin-II regulation. Curr Opin Cell Biol. 1999;11:26–33.
Berg JS, Powell BC, Cheney RE. A millennial myosin census. Mol Biol Cell. 2001;12:780–94.
Morin NA, Oakes PW, Hyun YM, Lee D, Chin EY, King MR, et al. Nonmuscle myosin heavy chain IIAmediates integrin LFA-1 de-adhesion during T lymphocyte migration. J Exp Med. 2008;205:195–205.
Lebwohl M, Tyring SK, Hamilton TK, Toth D, Glazer S, Tawfik NH, et al. A novel targeted T-cell modulator, efalizumab, for plaque psoriasis. N Engl J Med. 2003;349:2004–13.
Simmons DL. Anti-adhesion therapies. Curr Opin Pharmacol. 2005;5:398–404.
Gauvreau GM, Becker AB, Boulet LP, Chakir J, Fick RB, Greene WL, et al. The effects of an anti-CD11a mAb, efalizumab, on allergen-induced airway responses and airway inflammation in subjects with atopic asthma. J Allergy Clin Immunol. 2003;112:331–8.
Fischer A, Friedrich W, Fasth A, Blanche S, Le Deist F, Girault D, et al. Reduction of graft failure by a monoclonal antibody (anti-LFA-1 CD11a) after HLA nonidentical bone marrow transplantation in children with immunodeficiencies, osteopetrosis, and Fanconi’s anemia: a European Group for immunodeficiency/European Group for bone marrow transplantation report. Blood. 1991;77:249–56.
Gonzalez-Amaro R, Mittelbrunn M, Sanchez-Madrid F. Therapeutic anti-integrin (alpha4 and alphaL) monoclonal antibodies: two-edged swords? Immunology. 2005;116:289–96.
Le Mauff B, Hourmant M, Rougier JP, Hirn M, Dantal J, Baatard R, et al. Effect of anti-LFA1 (CD11a) monoclonal antibodies in acute rejection in human kidney transplantation. Transplantation. 1991;52:291–6.
Stoppa AM, Maraninchi D, Blaise D, Viens P, Hirn M, Olive D, et al. Anti-LFA1 monoclonal antibody (25.3) for treatment of steroid-resistant grade III-IV acute graft-versus-host disease. Transpl Int. 1991;4:3–7.
Cantor JM, Ginsberg MH, Rose DM. Integrin-associated proteins as potential therapeutic targets. Immunol Rev. 2008;223:236–51.
Springer T, Galfre G, Secher DS, Milstein C. Mac-1: a macrophage differentiation antigen identified by monoclonal antibody. Eur J Immunol. 1979;9:301–6.
Plow EF, Zhang L. A MAC-1 attack: integrin functions directly challenged in knockout mice. J Clin Invest. 1997;99:1145–6.
McFarland HI, Nahill SR, Maciaszek JW, Welsh RM. CD11b (Mac-1): a marker for CD8+ cytotoxic T cell activation and memory in virus infection. J Immunol. 1992;149:1326–33.
Springer TA, Thompson WS, Miller LJ, Schmalstieg FC, Anderson DC. Inherited deficiency of the Mac-1, LFA-1, p150, 95 glycoprotein family and its molecular basis. J Exp Med. 1984;160:1901–18.
Miller LJ, Bainton DF, Borregaard N, Springer TA. Stimulated mobilization of monocyte Mac-1 and p150, 95 adhesion proteins from an intracellular vesicular compartment to the cell surface. J Clin Invest. 1987;80:535–44.
Todd RF III, Arnaout MA, Rosin RE, Crowley CA, Peters WA, Babior BM. Subcellular localization of the large subunit of Mo1 (Mo1 alpha; formerly gp 110), a surface glycoprotein associated with neutrophil adhesion. J Clin Invest. 1984;74:1280–90.
Vedder NB, Harlan JM. Increased surface expression of CD11b/CD18 (Mac-1) is not required for stimulated neutrophil adherence to cultured endothelium. J Clin Invest. 1988;81:676–82.
Diamond MS, Springer TA. A subpopulation of Mac-1 (CD11b/CD18) molecules mediates neutrophil adhesion to ICAM-1 and fibrinogen. J Cell Biol. 1993;120:545–56.
Davey PC, Zuzel M, Kamiguti AS, Hunt JA, Aziz KA. Activation-dependent proteolytic degradation of polymorphonuclear CD11b. Br J Haematol. 2000;111:934–42.
Phillipson M, Heit B, Colarusso P, Liu L, Ballantyne CM, Kubes P. Intraluminal crawling of neutrophils to emigration sites: a molecularly distinct process from adhesion in the recruitment cascade. J Exp Med. 2006;203:2569–75.
Diamond MS, Garcia-Aguilar J, Bickford JK, Corbi AL, Springer TA. The I domain is a major recognition site on the leukocyte integrin Mac-1 (CD11b/CD18) for four distinct adhesion ligands. J Cell Biol. 1993;120:1031–43.
Diamond MS, Staunton DE, de Fougerolles AR, Stacker SA, Garcia-Aguilar J, Hibbs ML, et al. ICAM-1 (CD54): a counter-receptor for Mac-1 (CD11b/CD18). J Cell Biol. 1990;111:3129–39.
Gahmberg CG. Leukocyte adhesion: CD11/CD18 integrins and intercellular adhesion molecules. Curr Opin Cell Biol. 1997;9:643–50.
Altieri DC, Bader R, Mannucci PM, Edgington TS. Oligospecificity of the cellular adhesion receptor Mac-1 encompasses an inducible recognition specificity for fibrinogen. J Cell Biol. 1988;107:1893–900.
Beller DI, Springer TA, Schreiber RD. Anti-Mac-1 selectively inhibits the mouse and human type three complement receptor. J Exp Med. 1982;156:1000–9.
Ehlers MR. CR3: a general purpose adhesion-recognition receptor essential for innate immunity. Microbes Infect. 2000;2:289–94.
Diamond MS, Staunton DE, Marlin SD, Springer TA. Binding of the integrin Mac-1 (CD11b/CD18) to the third immunoglobulin-like domain of ICAM-1 (CD54) and its regulation by glycosylation. Cell. 1991;65:961–71.
Lub M, van Kooyk Y, Figdor CG. Competition between lymphocyte function-associated antigen 1 (CD11a/CD18) and Mac-1 (CD11b/CD18) for binding to intercellular adhesion molecule-1 (CD54). J Leukoc Biol. 1996;59:648–55.
Ding ZM, Babensee JE, Simon SI, Lu H, Perrard JL, Bullard DC, et al. Relative contribution of LFA-1 and Mac-1 to neutrophil adhesion and migration. J Immunol. 1999;163:5029–38.
Yakubenko VP, Lishko VK, Lam SC, Ugarova TP. A molecular basis for integrin alphaMbeta 2 ligand binding promiscuity. J Biol Chem. 2002;277:48635–42.
Zhang L, Plow EF. Amino acid sequences within the alpha subunit of integrin alpha M beta 2 (Mac-1) critical for specific recognition of C3bi. Biochemistry. 1999;38:8064–71.
Weber KS, Klickstein LB, Weber C. Specific activation of leukocyte beta2 integrins lymphocyte function-associated antigen-1 and Mac-1 by chemokines mediated by distinct pathways via the alpha subunit cytoplasmic domains. Mol Biol Cell. 1999;10:861–73.
Heit B, Colarusso P, Kubes P. Fundamentally different roles for LFA-1, Mac-1 and alpha4-integrin in neutrophil chemotaxis. J Cell Sci. 2005;118:5205–20.
Fagerholm SC, Hilden TJ, Nurmi SM, Gahmberg CG. Specific integrin alpha and beta chain phosphorylations regulate LFA-1 activation through affinity-dependent and -independent mechanisms. J Cell Biol. 2005;171:705–15.
Fagerholm SC, Varis M, Stefanidakis M, Hilden TJ, Gahmberg CG. alpha-Chain phosphorylation of the human leukocyte CD11b/CD18 (Mac-1) integrin is pivotal for integrin activation to bind ICAMs and leukocyte extravasation. Blood. 2006;108:3379–86.
Muchowski PJ, Zhang L, Chang ER, Soule HR, Plow EF, Moyle M. Functional interaction between the integrin antagonist neutrophil inhibitory factor and the I domain of CD11b/CD18. J Biol Chem. 1994;269:26419–23.
Jiang N, Chopp M, Chahwala S. Neutrophil inhibitory factor treatment of focal cerebral ischemia in the rat. Brain Res. 1998;788:25–34.
Krams M, Lees KR, Hacke W, Grieve AP, Orgogozo JM, Ford GA. Acute Stroke Therapy by Inhibition of Neutrophils (ASTIN): an adaptive dose-response study of UK-279, 276 in acute ischemic stroke. Stroke. 2003;34:2543–8.
Use of a monoclonal antibody directed against the platelet glycoprotein IIb/IIIa receptor in high-risk coronary angioplasty. The EPIC investigation. N Engl J Med. 1994;330:956–61.
Tcheng JE, Kandzari DE, Grines CL, Cox DA, Effron MB, Garcia E, et al. Benefits and risks of abciximab use in primary angioplasty for acute myocardial infarction: the controlled abciximab and device investigation to lower late angioplasty complications (CADILLAC) trial. Circulation. 2003;108:1316–23.
Anderson KM, Califf RM, Stone GW, Neumann FJ, Montalescot G, Miller DP, et al. Long-term mortality benefit with abciximab in patients undergoing percutaneous coronary intervention. J Am Coll Cardiol. 2001;37:2059–65.
Inoue T, Sakai Y, Fujito T, Hoshi K, Hayashi T, Takayanagi K, et al. Clinical significance of neutrophil adhesion molecules expression after coronary angioplasty on the development of restenosis. Thromb Haemost. 1998;79:54–8.
Pietersma A, Kofflard M, de Wit LE, Stijnen T, Koster JF, Serruys PW, et al. Late lumen loss after coronary angioplasty is associated with the activation status of circulating phagocytes before treatment. Circulation. 1995;91:1320–5.
Mickelson JK, Lakkis NM, Villarreal-Levy G, Hughes BJ, Smith CW. Leukocyte activation with platelet adhesion after coronary angioplasty: a mechanism for recurrent disease? J Am Coll Cardiol. 1996;28:345–53.
Schwarz M, Nordt T, Bode C, Peter K. The GP IIb/IIIa inhibitor abciximab (c7E3) inhibits the binding of various ligands to the leukocyte integrin Mac-1 (CD11b/CD18, alphaMbeta2). Thromb Res. 2002;107:121–8.
Rogers C, Edelman ER, Simon DI. A mAb to the beta2-leukocyte integrin Mac-1 (CD11b/CD18) reduces intimal thickening after angioplasty or stent implantation in rabbits. Proc Natl Acad Sci USA. 1998;95:10134–9.
Ross GD, Cain JA, Myones BL, Newman SL, Lachmann PJ. Specificity of membrane complement receptor type three (CR3) for beta-glucans. Complement. 1987;4:61–74.
Thornton BP, Vetvicka V, Pitman M, Goldman RC, Ross GD. Analysis of the sugar specificity and molecular location of the β-glucan-binding lectin site of complement receptor type 3 (CD11b/CD18). J Immunol. 1996;156:1235–46.
Xia Y, Vetvicka V, Yan J, Hanikyrova M, Mayadas T, Ross GD. The beta-glucan-binding lectin site of mouse CR3 (CD11b/CD18) and its function in generating a primed state of the receptor that mediates cytotoxic activation in response to iC3b-opsonized target cells. J Immunol. 1999;162:2281–90.
Hong F, Hansen RD, Yan J, Allendorf DJ, Baran JT, Ostroff GR, et al. Beta-glucan functions as an adjuvant for monoclonal antibody immunotherapy by recruiting tumoricidal granulocytes as killer cells. Cancer Res. 2003;63:9023–31.
Yan J, Vetvicka V, Xia Y, Coxon A, Carroll MC, Mayadas TN, et al. Beta-glucan, a “specific” biologic response modifier that uses antibodies to target tumors for cytotoxic recognition by leukocyte complement receptor type 3 (CD11b/CD18). J Immunol. 1999;163:3045–52.
Eisenhardt SU, Schwarz M, Schallner N, Soosairajah J, Bassler N, Huang D, et al. Generation of activation-specific human anti-alphaMbeta2 single-chain antibodies as potential diagnostic tools and therapeutic agents. Blood. 2007;109:3521–8.
Lobb RR, Hemler ME. The pathophysiologic role of alpha 4 integrins in vivo. J Clin Invest. 1994;94:1722–8.
Luo BH, Carman CV, Springer TA. Structural basis of integrin regulation and signaling. Annu Rev Immunol. 2007;25:619–47.
Puig-Kroger A, Sanz-Rodriguez F, Longo N, Sanchez-Mateos P, Botella L, Teixido J, et al. Maturation-dependent expression and function of the CD49d integrin on monocyte-derived human dendritic cells. J Immunol. 2000;165:4338–45.
Rosen GD, Sanes JR, LaChance R, Cunningham JM, Roman J, Dean DC. Roles for the integrin VLA-4 and its counter receptor VCAM-1 in myogenesis. Cell. 1992;69:1107–19.
Nieto M, Gomez M, Sanchez-Mateos P, Fernandez E, Marazuela M, Sacedon R, et al. Expression of functionally active alpha 4 beta 1 integrin by thymic epithelial cells. Clin Exp Immunol. 1996;106:170–8.
Prosper F, Stroncek D, McCarthy JB, Verfaillie CM. Mobilization and homing of peripheral blood progenitors is related to reversible downregulation of alpha4 beta1 integrin expression and function. J Clin Invest. 1998;101:2456–67.
Yang JT, Rayburn H, Hynes RO. Cell adhesion events mediated by α4 integrins are essential in placental and cardiac development. Development. 1995;121:549–60.
Cunningham SA, Rodriguez JM, Arrate MP, Tran TM, Brock TA. JAM2 interacts with alpha4beta1. Facilitation by JAM3. J Biol Chem. 2002;277:27589–92.
Ebnet K, Suzuki A, Ohno S, Vestweber D. Junctional adhesion molecules (JAMs): more molecules with dual functions? J Cell Sci. 2004;117:19–29.
Butcher EC, Williams M, Youngman K, Rott L, Briskin M. Lymphocyte trafficking and regional immunity. Adv Immunol. 1999;72:209–53.
Alon R, Kassner PD, Carr MW, Finger EB, Hemler ME, Springer TA. The integrin VLA-4 supports tethering and rolling in flow on VCAM-1. J Cell Biol. 1995;128:1243–53.
Berlin C, Bargatze RF, von Andrian UH, Szabo MC, Hasslen SR, Nelson RD, et al. α4 integrins mediate lymphocyte attachment and rolling under physiologic flow. Cell. 1995;80:413–22.
Sims TN, Dustin ML. The immunological synapse: integrins take the stage. Immunol Rev. 2002;186:100–17.
Mittelbrunn M, Molina A, Escribese MM, Yanez-Mo M, Escudero E, Ursa A, et al. VLA-4 integrin concentrates at the peripheral supramolecular activation complex of the immune synapse and drives T helper 1 responses. Proc Natl Acad Sci USA. 2004;101:11058–63.
Reedquist KA, Ross E, Koop EA, Wolthuis RM, Zwartkruis FJ, van Kooyk Y, et al. The small GTPase, Rap1, mediates CD31-induced integrin adhesion. J Cell Biol. 2000;148:1151–8.
Bos JL, de Rooij J, Reedquist KA. Rap1 signalling: adhering to new models. Nat Rev Mol Cell Biol. 2001;2:369–77.
Goldfinger LE, Han J, Kiosses WB, Howe AK, Ginsberg MH. Spatial restriction of α4 integrin phosphorylation regulates lamellipodial stability and α4β1-dependent cell migration. J Cell Biol. 2003;162:731–41.
Han J, Rose DM, Woodside DG, Goldfinger LE, Ginsberg MH. Integrin α4β1-dependent cell migration requires both phosphorylation and de-phosphorylation of the a4 cytoplasmic domain. J Biol Chem. 2003;278:34845–53.
Yednock TA, Cannon C, Fritz LC, Sanchez-Madrid F, Steinman L, Karin N. Prevention of experimental autoimmune encephalomyelitis by antibodies against α4β1 integrin. Nature. 1992;356:63–6.
Ghosh S, Goldin E, Gordon FH, Malchow HA, Rask-Madsen J, Rutgeerts P, et al. Natalizumab for active Crohn’s disease. N Engl J Med. 2003;348:24–32.
Laberge S, Rabb H, Issekutz TB, Martin JG. Role of VLA-4 and LFA-1 in allergen-induced airway hyperresponsiveness and lung inflammation in the rat. Am J Respir Crit Care Med. 1995;151:822–9.
Offner H, Subramanian S, Parker SM, Wang C, Afentoulis ME, Lewis A, et al. Splenic atrophy in experimental stroke is accompanied by increased regulatory T cells and circulating macrophages. J Immunol. 2006;176:6523–31.
Laffon A, Garcia-Vicuna R, Humbria A, Postigo AA, Corbi AL, de Landazuri MO, et al. Upregulated expression and function of VLA-4 fibronectin receptors on human activated T cells in rheumatoid arthritis. J Clin Invest. 1991;88:546–52.
Podolsky DK. Inflammatory bowel disease (1). N Engl J Med. 1991;325:928–37.
Jackson DY. α4 integrin antagonists. Curr Pharm Des. 2002;8:1229–53.
Yusuf-Makagiansar H, Anderson ME, Yakovleva TV, Murray JS, Siahaan TJ. Inhibition of LFA-1/ICAM-1 and VLA-4/VCAM-1 as a therapeutic approach to inflammation and autoimmune diseases. Med Res Rev. 2002;22:146–67.
Berlin C, Berg EL, Briskin MJ, Andrew DP, Kilshaw PJ, Holzmann B, et al. α4β7 integrin mediates lymphocyte binding to the mucosal vascular addressin MAdCAM-1. Cell. 1993;74:185–95.
Hemler ME, Elices MJ, Parker C, Takada Y. Structure of the integrin VLA-4 and its cell-cell and cell-matrix adhesion functions. Immunol Rev. 1990;114:45–65.
Steinman L. Blocking adhesion molecules as therapy for multiple sclerosis: natalizumab. Nat Rev Drug Discov. 2005;4:510–8.
Kleinschmidt-DeMasters BK, Tyler KL. Progressive multifocal leukoencephalopathy complicating treatment with natalizumab and interferon beta-1a for multiple sclerosis. N Engl J Med. 2005;353:369–74.
Langer-Gould A, Atlas SW, Green AJ, Bollen AW, Pelletier D. Progressive multifocal leukoencephalopathy in a patient treated with natalizumab. N Engl J Med. 2005;353:375–81.
Van Assche G, Van Ranst M, Sciot R, Dubois B, Vermeire S, Noman M, et al. Progressive multifocal leukoencephalopathy after natalizumab therapy for Crohn’s disease. N Engl J Med. 2005;353:362–8.
Koralnik IJ. New insights into progressive multifocal leukoencephalopathy. Curr Opin Neurol. 2004;17:365–70.
Yousry TA, Major EO, Ryschkewitsch C, Fahle G, Fischer S, Hou J, et al. Evaluation of patients treated with natalizumab for progressive multifocal leukoencephalopathy. N Engl J Med. 2006;354:924–33.
Kummer C, Ginsberg MH. New approaches to blockade of alpha4-integrins, proven therapeutic targets in chronic inflammation. Biochem Pharmacol. 2006;72:1460–8.
Peter K, Schwarz M, Ylanne J, Kohler B, Moser M, Nordt T, et al. Induction of fibrinogen binding and platelet aggregation as a potential intrinsic property of various glycoprotein IIb/IIIa (αIIbβ3) inhibitors. Blood. 1998;92:3240–9.
Quinn MJ, Plow EF, Topol EJ. Platelet glycoprotein IIb/IIIa inhibitors: recognition of a two-edged sword? Circulation. 2002;106:379–85.
Acknowledgments
This project was supported by NIH HL087088 (M.K.), and NIH HL18208 (M.K.).
Author information
Authors and Affiliations
Corresponding author
Additional information
Young-Min Hyun, and Craig T. Lefort, contributed equally to this work.