title: Successful utilization of lyophilized lipoprotein(a) as a biological reagent.
abstract: Lipoprotein(a) [Lp(a)] represents a class of lipoprotein particles having as a protein moiety apoB-100 linked by a single disulfide bond to apolipoprotein(a) [apo(a)], a multikringle structure with a high degree of homology with plasminogen. A recognized feature of Lp(a) is its instability on storage caused by attendant protein and lipid modifications that affect the structural, functional, and immunological properties of this lipoprotein. Here we present data showing that, under appropriate conditions of cryopreservation, Lp(a) retains the properties of the freshly isolated product, and we provide examples supporting the stability of this cryopreserved product as a primary standard in immunoassay settings and in cell culture systems.
authors.affiliation: Departments of Medicine and Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois 60637, USA. ascanu@medicine.bsd.uchicago.edu
authors.forename: Angelo M
authors.initials: AM
authors.lastname: Scanu
authors.forename: Janet
authors.initials: J
authors.lastname: Hinman
authors.forename: Ditta
authors.initials: D
authors.lastname: Pfaffinger
authors.forename: Celina
authors.initials: C
authors.lastname: Edelstein
mesh_terms: D015925:Cryopreservation / Q000379:methods; D004355:Drug Stability; D005612:Freeze Drying; D007202:Indicators and Reagents; D017270:Lipoprotein(a) / Q000592:standards*; D008722:Methods; D012015:Reference Standards
chemical_list: D007202:Indicators and Reagents; D017270:Lipoprotein(a)