The monoclonal antibody SZ1 is of interest for two reasons: it was used to define complex formation between glycoprotein (GP) Ib and GP IX, and its epitope is likely to be identical to that recognized by most quinine- and quinidine-dependent autoantibodies that cause thrombocytopenia. To determine the location of the epitope for SZ1 within the GP Ib-IX complex (which consists of three subunits:...

Recently, a convincing body of evidence has accumulated suggesting that the overexpression of carbonic anhydrase isozyme IX (CA IX) in some cancers contributes to the acidification of the extracellular matrix, which in turn promotes the growth and metastasis of the tumor. These observations have made CA IX an attractive drug target for the selective treatment of certain cancers. Currently, ther...

Carbonic anhydrase IX (CA IX) is a transmembrane glycoprotein with an active extracellular enzyme site. We have shown previously that it was hypoxia inducible and may therefore be an endogenous marker of hypoxia. It is overexpressed in some tumors, particularly renal cell carcinoma. The aim of this study was to examine the expression and localization of CA IX in head and neck squamous cell carc...

Carbonic anhydrase IX (CA IX) is a surrogate marker of hypoxia, involved in survival and pH regulation in hypoxic cells. We have recently characterized its interactome, describing a set of proteins interacting with CA IX, mainly in hypoxic cells, including several members of the nucleocytoplasmic shuttling apparatuses. Accordingly, we described complex subcellular localization for this enzyme i...

Type IX collagen-proteoglycan is a major component of hyaline cartilages where it is located on the surface of the collagen fibrils so that a collagenous domain of the molecule (called COL3) and a non-collagenous domain (called NC4) project at periodic distances away from the surface of the fibril. Type IX collagen-proteoglycan is also present on the surface of the collagen fibrils of the adult...

We have determined the 2905 nucleotide sequence of the rhesus macaque factor IX complementary DNA (cDNA) and found it to be greater than 95% identical to that of the human factor IX cDNA. The cDNA has a large 3' untranslated region like the human cDNA, but unlike the human cDNA has two polyadenylation sites 224 nucleotides apart that are used for transcription of the messenger RNA. The deduced ...

Effects of iron supplementation on iron status, health and neurological development in marginally low birth weight infants. Abstract vi Original papers vii Abbreviations viii Populärvetenskaplig sammanfattning ix Bakgrund ix Metod ix Resultat x Slutsatser x Background 1

Bovine factor IX (Christmas factor) is a coagulation protein present in plasma in a precursor or inactive form. It is a glycoprotein (M, = 55,000) composed of a single polypeptide chain. Factor IX in the presence of calcium ions is converted to factor IX, by factor XI, (activated plasma thromboplastin antecedent) or a protease present in Russell’s viper venom. The activation of factor IX by the...

The platelet von Willebrand factor (vWF) receptor, glycoprotein Ib-IX (GPIb-IX), mediates platelet adhesion and induces signaling leading to integrin activation. Phosphoinositol 3-kinase (PI3K) is important in GPIb-IX-mediated signaling. PI3K-dependent signaling mechanisms, however, are unclear. We show that GPIb-IX-induced platelet aggregation and stable adhesion under flow were impaired in mo...

A potentially cost-effective strategy for gene therapy of hemophilia B is to create universal factor IX-secreting cell lines suitable for implantation into different patients. To avoid graft rejection, the implanted cells are enclosed in alginate-polylysine-alginate microcapsules that are permeable to factor IX diffusion, but impermeable to the hosts' immune mediators. This nonautologous approa...