Leukocyte adhesion deficiency, type IOMIM Phenotype
Preferred Label : Leukocyte adhesion deficiency, type I;
Symbol : LAD1;
CISMeF acronym : LAD; LAD1;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : LAD; Lfa1 immunodeficiency; Lymphocyte function-associated antigen 1 immunodeficiency; Leukocyte adhesion deficiency;
Description : Leukocyte adhesion deficiency (LAD) is an autosomal recessive disorder of neutrophil
function resulting from a deficiency of the beta-2 integrin subunit of the leukocyte
cell adhesion molecule. The leukocyte cell adhesion molecule is present on the surface
of peripheral blood mononuclear leukocytes and granulocytes and mediates cell-cell
and cell-extracellular matrix adhesion. LAD is characterized by recurrent bacterial
infections; impaired pus formation and wound healing; abnormalities of a wide variety
of adhesion-dependent functions of granulocytes, monocytes, and lymphocytes; and a
lack of beta-2/alpha-L, beta-2/alpha-M, and beta-2/alpha-X expression.;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutations in the beta-2 integrin gene (ITGB2, 600065.0001);
Laboratory abnormalities : Low levels of CD11/CD18 (LFA-1 or leukocyte function antigen-1) glycoprotein;