Linked Life Data

11204559

Source:http://linkedlifedata.com/resource/pubmed/id/11204559

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2001-2-1
pubmed:abstractText
We found a 66-year-old Japanese patient with type I congenital heparin cofactor (HC) II deficiency manifesting multiple atherosclerotic lesions. To investigate the molecular pathogenesis of our patient, we performed sequencing analysis and expressed recombinant human wild-type and mutant HC II molecules in COS-1 and CHO-K1 cells. Sequencing analysis following amplification of each of all 5 exons and its flanking region showed a single C to T transition at nucleotide position 12,854 in exon 5, which changed a Pro443 codon (CCG) to Leu codon (CTG). Because this mutation generates a new Bhv I site, the Bbv I digestion pattern of the PCR-amplified exon 5 fragments from each family member was analyzed. In all cases, the patterns were consistent with the activities and antigen levels of plasma HC I1 in those members. Transient transfection, metabolic labeling and pulse-chase experiments followed by immunoprecipitation analysis showed that the recombinant mutant HC II molecules were secreted from COS-1 cells in reduced amounts compared with the wild-type, and that an enhanced intracellular association of the mutant molecules with a chaperone, GRP78/BiP, was observed in CHO-K1 cells. Northern blot analysis indicated that the mutant HC I1 mRNA was transcribed at a similar level as that of wild-type. Immunohistochemical staining of the transfected cells revealed that COS-1 cells expressing the mutant HC II molecules were stained mainly in the perinuclear area. We conclude that the impaired secretion of the mutant HC II molecules, due to intracellular degradation, is the molecular pathogenesis of type I congenital HC II deficiency caused by a Pro443 to Leu mutation at reactive P2 site.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0340-6245
pubmed:author
pubmed:issnType
Print
pubmed:volume
85
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
101-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:11204559-Aged, pubmed-meshheading:11204559-Animals, pubmed-meshheading:11204559-Arteriosclerosis, pubmed-meshheading:11204559-Binding Sites, pubmed-meshheading:11204559-COS Cells, pubmed-meshheading:11204559-Carrier Proteins, pubmed-meshheading:11204559-DNA Mutational Analysis, pubmed-meshheading:11204559-Family Health, pubmed-meshheading:11204559-Female, pubmed-meshheading:11204559-Heat-Shock Proteins, pubmed-meshheading:11204559-Heparin Cofactor II, pubmed-meshheading:11204559-Humans, pubmed-meshheading:11204559-Male, pubmed-meshheading:11204559-Molecular Chaperones, pubmed-meshheading:11204559-Mutation, Missense, pubmed-meshheading:11204559-Pedigree, pubmed-meshheading:11204559-Prothrombin, pubmed-meshheading:11204559-Recombinant Proteins, pubmed-meshheading:11204559-Serine Proteinase Inhibitors, pubmed-meshheading:11204559-Transfection
pubmed:year
2001
pubmed:articleTitle
Molecular mechanism of type I congenital heparin cofactor (HC) II deficiency caused by a missense mutation at reactive P2 site: HC II Tokushima.
pubmed:affiliation
First Department of Internal Medicine, University of Tokushima School of Medicine, Japan.
pubmed:publicationType
Journal Article, Case Reports, Research Support, Non-U.S. Gov't