Leukocyte adhesion deficiency

Definition:

Leukocyte adhesion deficiency (LAD) is a rare, autosomal recessive genetic disorder in which neutrophils fail to mobilize and migrate to sites of injury. At least three genetically distinct forms of this group of disorders have been described: LAD I, II, and III. Defects in the expression of beta2-integrins and fucose- containing proteins account for LAD-I and LAD-II, respectively. In LAD-III integrin expression by leukocytes is normal, but the integrins fail to generate high avidity for their cognate endothelial-cell ligands. Mutations in the KINDLIN3 (official symbol FERMT3), a gene that encodes an intracellular protein that interacts with cytoplasmic tails of beta-integrins in hematopoietic cells, is the cause of LAD-III. Dominant-negative mutations resulting in deficiency of ras-related C3 botulinum toxin substrate (Rac2), the predominant hematopoeitic-specific Rho GTPase in neutrophils also leads to leukocyte adhesion deficiency.

References:

[1]. Arvind Kumar, et al. Current perspectives on primary immunodeficiency diseases. Clin Dev Immunol. 2006 Jun-Dec;13(2-4):223-59. [Content Brief]

[2]. D R Ambruso, et al. Human neutrophil immunodeficiency syndrome is associated with an inhibitory Rac2 mutation. Proc Natl Acad Sci U S A. 2000 Apr 25;97(9):4654-9. [Content Brief]

[3]. Guy A Zimmerman, et al. LAD syndromes: FERMT3 kindles the signal. Blood. 2009 May 7;113(19):4485-6. [Content Brief]

[4]. László Maródi, et al. Immunological and genetic bases of new primary immunodeficiencies. Nat Rev Immunol. 2007 Nov;7(11):851-61. [Content Brief]

[5]. Massimo Morra, et al. Genetic diagnosis of primary immune deficiencies. Immunol Allergy Clin North Am. 2008 May;28(2):387-412, x. [Content Brief]

[6]. R M Ten, et al. Primary immunodeficiencies. Mayo Clin Proc. 1998 Sep;73(9):865-72. [Content Brief]

[7]. Raif S Geha, et al. Primary immunodeficiency diseases: an update from the International Union of Immunological Societies Primary Immunodeficiency Diseases Classification Committee. J Allergy Clin Immunol. 2007 Oct;120(4):776-94. [Content Brief]

Biomedical Dictionary

The Biomedical Dictionary is a comprehensive and professional collection of biological academic terms and subject datas. All explanations are supported by authoritative books or high impact factor literatures, and you can acquire accurate explanations of the biomedical terms you want to know.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Name
Email *

	Sorry, but the email address you supplied was invalid.