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Topic: Leukocyte adhesion cascade

Related Topics

cell adhesion proteins

factor of adhesion

Adhesion contract

Focal adhesion kinase

energy of adhesion

Leukocyte adhesion deficiency type 2

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	adhesion molecules - multiple sclerosis encyclopaedia (Site not responding. Last check: 2007-10-10)
		The chemokines migrate to the inner layer of blood and lymph vessels (the endothelial layer) causing specific adhesion molecules to be expressed on the surface of the endothelial cells.
		Adhesion molecules, especially a sub-group called selectins, are believed to play a pivotal role in several chronic immune diseases.
		Cytokines, chemokines and adhesion molecules in lymphocyte infiltration
	www.mult-sclerosis.org /adhesionmolecules.html (204 words)

	NC State NA Seminar, Fall 2003
		Leukocytes extravasate into the inflamed tissue through a multi-step process, referred to as "leukocyte adhesion cascade", which involves leukocyte margination, initial contact of a leukocyte with the activated endothelium (capture or tethering), leukocyte rolling, firm adhesion and activation, and transendothelial migration.
		In our model of cell-to-surface adhesion, a leukocyte is as a deformable viscoelastic cell with the nucleus located in the intracellular space and cylindrical microvilli distributed over the cell membrane.
		The viscoelasticity of the nucleus and cytoplasm is captured by the Giesekus constitutive equation.
	www2.ncsu.edu /math/Announcements/NAS/SPRING_2005/khismatulin.html (227 words)

	Talk 5507 data/Fall_2005/1114
		Recruitment of leukocytes into sites of acute and chronic inflammation is a vital component of the innate immune response in humans and plays an important role in cardiovascular diseases, such as ischemia-reperfusion injury and atherosclerosis.
		Leukocytes extravasate into the inflamed tissue through a multi-step process called "leukocyte adhesion cascade", which involves initial contact of a leukocyte with activated endothelium (tethering), leukocyte rolling, firm adhesion, andtransendothelial migration.
		Results of this study also indicate that viscosity of the cytoplasm is a critical parameter of leukocyte adhesion, affecting the cell's ability to roll on endothelium.
	www.math.duke.edu /mcal?abstract-5507 (231 words)

	Untitled Document
		The leukocyte adhesion cascade is a sequence of adhesion and activation events that ends with extravasation of the leukocyte, whereby the cell exerts its effects on the inflamed site.
		At least five steps of the adhesion cascade are capture, rolling, slow rolling, firm adhesion, and transmigration.
		The ultimate goal of inflammation research is to develop methods to control inflammation by modulating or blocking leukocyte adhesion to the endothelium.
	bme.virginia.edu /ley/main.html (285 words)

	Brown Medical School
		Since the ultimate goal of inflammation research is to develop methods to control inflammation by modulating and blocking leukocyte adhesion and migration, the roles of integrins, cell surface adhesion molecules involved in leukocyte migration, have been investigated.
		One of the major inflammatory responses is leukocyte transmigration through endothelium and accumulation at the site of injury and the leukocyte adhesion cascade is a sequence of adhesion and activation events such as rolling, firm adhesion, and transmigration.
		Unlike cells within solid tissues, circulating leukocytes relocate during the course of immune reactions and dynamically adhere and de-adhere to cells of the vasculature and to other immune cells, as well as to components of the extracellular matrix.
	www.brown.edu /Divisions/Medical_School/andera/profile.php?id=1127407471 (800 words)

	eMedicine - Complement Receptor Deficiency : Article Excerpt by: Alan P Knutsen, MD (Site not responding. Last check: 2007-10-10)
		The leukocyte adhesion deficiency syndromes are due to defects of several molecules of the adhesion cascade.
		Leukocyte adhesion deficiency type 1 (LAD1) is due to a deficiency of CD18.
		Ligands for CD11a/CD18 are intercellular adhesion molecules (ICAMs), for CD11b/CD18 complement C3bi and ICAM-1 and for CD11c/CD18 C3bi and ICAM-1.
	www.emedicine.com /ped/byname/complement-receptor-deficiency.htm (570 words)

	Differential Effect of E-Selectin Antibodies on Neutrophil Rolling and Recruitment to Inflammatory Sites -- Ramos et ... (Site not responding. Last check: 2007-10-10)
		Leukocyte rolling is known to be mediated by the selectins, a family of three mammalian transmembrane adhesion molecules with similar structural organization consisting of an N-terminal lectin domain, an epidermal growth factor (EGF)-like domain, multiple consensus repeats, a transmembrane, and a cytoplasmic domain.
		Adhesion of HL-60 cells to COS cells transfected with murine E-selectin (lectin, EGF, and CR1-6 domains) was investigated in the presence and absence of the E-selectin MoAbs and an isotype-matched control antibody at 20 µg/mL.
		Adhesion was quantified by measuring the fluorescence intensity of the supernatant obtained after lysis of labeled HL-60 cells bound to E-selectin-transfected COS cells.
	www.bloodjournal.org /cgi/content/full/89/8/3009 (7072 words)

	Adhesion Molecules II
		Adhesion molecules are also capable of transmitting information from the extracellular matrix to the cell.
		Transendothelial migration of leukocytes is an example of one of the many roles of adhesion molecules.
		During metastasis, cells must be able to detach from the primary tumor, enter the blood stream through attachment to a blood vessel wall, travel through the bloodstream, and attach to a vessel wall at a secondary site in order to establish a new tumor.
	www.rndsystems.com /mini_review_detail_objectname_MR01_AdhesionMolII.aspx (1092 words)

	VIVA project leukocytedetection (Site not responding. Last check: 2007-10-10)
		An algorithm that automatically detects the positions of leukocytes in a video could be used to initialize a tracking program or to count the number of cells that pass through a given line per unit time.
		Unlike bright cells, dark leukocytes don't not have a strong contrast with the background and tend to have broken edges.
		Using these two metrics, both leukocytes and non-leukocytes were ground truthed to determine the statistics under the two cases, leukocyte and non-leukocyte.
	viva.ee.virginia.edu /projects_leukocytedetection.htm (457 words)

	Neprinol Syntol Devacor on Sale - Inflammation (Site not responding. Last check: 2007-10-10)
		The leukocyte adhesion cascade is a sequence of adhesion and activation events that ends with extravasation of the leukocyte, whereby the cell exerts its effects on the inflamed site.
		The roles of adhesion molecules in acute and chronic inflammation have been investigated using in vitro model systems and in vivo microcirculation studies.
		The ultimate goal of inflammation research is to develop methods to control inflammation by modulating or blocking leukocyte adhesion to the endothelium.
	www.enzymus.com /inflammation (320 words)

	Sarnoff Endowment Fellows: Daniel Greif (Site not responding. Last check: 2007-10-10)
		Selectins (E-, P- and L-selectin) are a family of glycoproteins that mediate leukocyte initial attachment and rolling on vascular endothelium during the inflammatory response in vascular shear flow.
		Leukocytes have multiple ligands for E- and P-selectin, including L-selectin and P-selectin glycoprotein ligand-1 (PSGL-1), a well characterized high affinity ligand for P-selectin.
		Thus, this model allows study of the contributions of individual adhesion pathways that comprise the multi-step leukocyte-endothelial adhesion cascade.
	www.sarnoffendowment.org /fellows/greif.shtml (294 words)

	Inflazyme Pharmaceuticals Ltd. - Pioneering Science \| Improving Life
		This cascade involves a very specific sequence of events that takes place at the molecular level of the inflammatory response irrespective of whether a person is suffering from acute or chronic inflammation.
		Adhesion: As the rolling rate slows, the components on the outside of the leukocyte may bind to adhesion molecules on the endothelium, causing the leukocyte to adhere tightly to the endothelium.
		Transmigration: This is the migration of the adhered leukocyte between adjacent endothelial cells to the underlying tissue.
	www.inflazyme.com /fightingInflammation.php (1078 words)

	P-Selectin Binding Promotes the Adhesion of Monocytes to VCAM-1 Under Flow Conditions -- Yago et al. 163 (1): 367 -- ...
		Leukocyte migration is subject to a multistep adhesion cascade.
		Monocyte adhesion to vascular endothelium and migration to vascular endothelial
		Increase in the adhesion molecule P-selectin in endothelium overlying atherosclerotic plaques: coexpression with intercellular adhesion molecule-1.
	www.jimmunol.org /cgi/content/full/163/1/367 (3964 words)

	Leukocyte Adhesion Deficiency Web Site
		Leukocyte Adhesion Deficiency or L.A.D. is a very rare genetic disorder or orphan disease.
		If the leukocytes cannot get to the site of the injury or infection, they cannot do the job they were designed to do and that is to protect the body.
		Even though leukocytes are constantly circulating throughout your blood stream, they are not necessarily where they need to be when you are injured, well at least not in sufficient quantity.
	www.ladinfo.org (3363 words)

	Role of shear forces and adhesion molecule distribution on P-selectin-mediated leukocyte rolling in postcapillary ...
		B: leukocyte velocity (slope of the displacement versus time) for 3 representative leukocytes, each sampled in venular regions with different shear environments, showing that velocity remains consistent except where there is a high velocity translation associated with detachment from the endothelial surface.
		the occurrence of transient detachments of the leukocyte from
		Leukocyte rolling and extravasation are severely compromised in P selectin-deficient mice.
	ajpheart.physiology.org /cgi/content/full/287/6/H2705 (4826 words)

	L-selectin mediated leukocyte tethering in shear flow
		In contrast to a macroscopic sticky sphere rolling down an inclined plane, rolling adhesion of leukocytes is based on discret molecular events and therefore leads to jerky movement.
		The most convenient tool to study the extravasation cascade is the parallel plate flow chamber, which allows to control flow conditions and ligand presentation.
		L-selectin is a leukocyte-expressed adhesion receptor which is localized to tips of leukocyte microvilli and which binds to glycosylated ligands on the endothelium (the major L-selectin ligand being PNAd).
	www.bioms.de /schwarz/rollingadhesion.html (1424 words)

	Neelamegham research areas
		A cascade of events involving at least three families of adhesion molecules plays a role in leukocyte adhesion at sites of inflammation: these molecules are members of the selectin, integrin and Immunoglobulin gene superfamily (see Figure A).
		With this in mind, we perform studies that contribute to a fundamental understanding of the roles of biomolecules, cell signaling processes and fluid forces in regulating the leukocyte adhesion cascade.
		Special emphasis is placed on understanding the features regulating the time- and stimulus- dependent transition of leukocytes from a quiescent state in the blood stream to an activated state at sites of inflammation.
	www.cheme.buffalo.edu /research_areas9.htm (681 words)

	Abstracts of 2nd MPME Day
		Studying the strength of the adhesion bonds and particularly comparing these forces in physiologic and pathologic conditions is scientifically and diagnostically valuable.
		Adhesion forces have been studied using different tools and methods, but optical tweezers have not been used in lymphocyte adhesion measurements.
		The original intention to study the dynamics of firm adhesion was not possible, because the adhesion forces exceeded the maximum force of the tweezers.
	www.lfty.fi /lft_paiva/abstracts03.html (1416 words)

	[No title]
		When the inflammatory process is initiated, leukocytes migrate to the outer edges of the blood stream and roll along the vessel’s surface endothelial cells in a slow, deliberate rolling motion (Figure 1).
		Leukocyte rolling progresses quickly to firm adhesion to the vessel wall; this portion of the cascade is mediated by integrins.
		The leukocyte-endothelial cell adhesion cascade was demonstrated in the 1980’s in a canine model of CPB.
	www.freemedcme.com /cme/articles/print_article.cfm?cme_id=7 (5874 words)

	Effects of cardiopulmonary bypass on leukocyte and endothelial adhesion molecules -- Asimakopoulos and Taylor 66 (6): ... (Site not responding. Last check: 2007-10-10)
		Adhesion molecules of the immunoglobulin superfamily are transmembrane
		Lefer A.M., Lefer D.J. The role of nitric oxide and cell adhesion molecules on the microcirculation in ischaemic–reperfusion.
		Mason J.C., Haskard D.O. The clinical importance of leukocyte and endothelial cell adhesion molecules in inflammation.
	ats.ctsnetjournals.org /cgi/content/full/66/6/2135 (5297 words)

	Transit Time of Leukocytes Rolling through Venules Controls Cytokine-induced Inflammatory Cell Recruitment In Vivo -- ...
		Leukocyte adhesion during inflammation is thought to proceed in a cascade-like fashion, in which selectins are responsible
		Rayburn, R.O. Hynes, and D.D. Wagner (1993) Leukocyte rolling and extravasation are severly compromised in P-selectin deficient mice.
		Ley (1997) Reduced leukocyte adhesion response and absence of slow leukocyte rolling in interleukin-8 receptor-deficient mice.
	www.jci.org /cgi/content/full/102/8/1526 (5564 words)

	Phosphorylation of the Cytoplasmic Domain of E-Selectin Is Regulated During Leukocyte-Endothelial Adhesion -- Yoshida ...
		Adhesion of HL-60 induced dephosphorylation of the adenovirally transduced
		Leukocyte adhesion to vascular endothelium induces E-selectin linkage to the actin cytoskeleton.
		Adhesion of memory lymphocytes to vascular cell adhesion molecule-1-transduced human vascular endothelial cells under simulated physiological flow conditions in vitro.
	www.jimmunol.org /cgi/content/full/161/2/933 (6658 words)

	Hydrocortisone reduced in vivo, inflammation-induced slow rolling of leukocytes and their extravasation into human ... (Site not responding. Last check: 2007-10-10)
		Leukocyte rolling in the nontreated patients was significantly slower than in the hydrocortisone-treated patients.
		Specimens taken before the inflammation contained essentially no leukocytes, but the number was significantly elevated in the specimens taken during the inflammation versus those taken before the inflammation, and hydrocortisone treatment significantly reduced their numbers.
		A 1-minute video (Cataract version 2 video; size, 12 Mb; format, quick time movie) demonstrating the leukocyte rolling during inflammation in capillaries, extravasated cells within the tissue, as well as the effects of hydrocortisone on these parameters is available via the University of Helsinki Web site (http://www.helsinki.fi/science/rdd/renkonen/publications.html).
	www.bloodjournal.org /cgi/content/full/100/6/2203 (3642 words)

	Simvastatin Inhibits Leukocyte-Endothelial Cell Interactions and Protects Against Inflammatory Processes in ...
		In contrast, thrombin-induced leukocyte adherence was significantly attenuated by pretreatment with 25 µg of simvastatin.
		Leukocyte extravasation was significantly reduced by intraperitoneal administration of 25 µg of simvastatin.
		as inhibition of platelet aggregation or leukocyte adhesion.
	atvb.ahajournals.org /cgi/content/full/19/12/2894 (4646 words)

	May 2002 Clinical Abstracts - College of American Pathologists (Site not responding. Last check: 2007-10-10)
		Recruiting leukocytes into sites of inflammation involves a tightly regulated series of molecular interactions that includes capture and rolling of cells mediated by selectins followed by fixation on the endothelium, which is a process mediated by the integrins.
		During these events, the leukocytes become activated through stimulation of G protein-coupled chemokine receptors, resulting in enhanced integrin adhesiveness and activation-dependent stable arrest.
		To determine the capacity of FKN on endothelial cells to promote leukocyte adhesion, the authors performed adhesion assays with PBMC and monolayers of TNF-a activated murine endothelial cells under low shear conditions.
	www.cap.org /apps/docs/cap_today/clinical_abstracts/clinical_0502.html (2756 words)

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