Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1999-2-16
pubmed:abstractText
In the leukocyte adhesion deficiency (LAD)-1 syndrome, there is diminished expression of beta2(CD18) integrins. This is caused by lesions in the beta2-subunit gene and gives rise to recurrent bacterial infections, impaired pus formation, and poor wound healing. We describe a patient with clinical features compatible with a moderately severe phenotype of LAD-1 but who expresses the beta2 integrins lymphocyte function- associated molecule (LFA)-1 and Mac-1 at 40%-60% of normal levels. This level of expression should be adequate for normal integrin function, but both the patient's Mac-1 on neutrophils and LFA-1 on T cells failed to bind ligands such as fibrinogen and intercellular adhesion molecule (ICAM)-1, respectively, or to display a beta2-integrin activation epitope after adhesion-inducing stimuli. Unexpectedly, divalent cation treatment induced the patient's T cells to bind to ICAM-2 and ICAM-3. Sequencing of the patient's two CD18 alleles revealed the mutations S138P and G273R. Both mutations are in the beta2-subunit conserved domain, with S138P a putative divalent cation coordinating residue in the metal ion-dependent adhesion site (MIDAS) motif. After K562 cell transfection with alpha subunits, the mutated S138P beta subunit was coexpressed but did not support function, whereas the G273R mutant was not expressed. In summary, the patient described here exhibits failure of the beta2 integrins to function despite adequate levels of cell-surface expression.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-1346139, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-1358992, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-1370656, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-1541641, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-1675856, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-1683838, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-1970514, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-2479549, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-3555290, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-6136643, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-6225125, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-6272317, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-6290247, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-6480827, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7518468, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7520434, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7531103, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7535698, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7595194, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7608533, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7680657, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7685913, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7690325, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7705401, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7814426, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7867070, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-7922371, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8095966, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8248808, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8537655, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8596031, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8600538, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8626649, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8663418, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8702782, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8703003, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8798624, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8806078, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-8975879, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9009218, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9312170, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9351872, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9354475, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9456328, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9570563, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9765268, http://linkedlifedata.com/resource/pubmed/commentcorrection/9884339-9808198
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0021-9738
pubmed:author
pubmed:issnType
Print
pubmed:volume
103
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
97-106
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
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