title: Stability measurement of oligonucleotides in serum samples using capillary electrophoresis.
abstract: An in vitro stability study of unmodified and modified antisense oligonucleotides in human serum was performed with a previously developed capillary electrophoretic method using either micellar solution or entangled polymer solution depending on the oligonucleotide length to be separated. A method has been devised and validated for the extraction of oligonucleotides from serum using anion-exchange centrifugal filter units. The extracted samples were desalted by a drop dialysis method. The serum half-lives and the degradation patterns of unmodified and modified oligonucleotides are compared. The modified oligonucleotide used in this study is protected from exonuclease activity present in human serum by terminal 1,3-propanediol modification.
authors.affiliation: Laboratorium voor Farmaceutische Chemie en Analyse van Geneesmiddelen, Faculteit Farmaceutische Wetenschappen, Leuven, Belgium.
authors.forename: K
authors.initials: K
authors.lastname: Khan
authors.forename: K
authors.initials: K
authors.lastname: Liekens
authors.forename: A
authors.initials: A
authors.lastname: Van Aerschot
authors.forename: A
authors.initials: A
authors.lastname: Van Schepdael
authors.forename: J
authors.initials: J
authors.lastname: Hoogmartens
mesh_terms: D001483:Base Sequence; D019075:Electrophoresis, Capillary / Q000379:methods*; D006207:Half-Life; D006801:Humans; D008823:Micelles; D016376:Oligonucleotides, Antisense / Q000097:blood* / Q000737:chemistry / Q000378:metabolism; D011108:Polymers / Q000737:chemistry; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet
chemical_list: D008823:Micelles; D016376:Oligonucleotides, Antisense; D011108:Polymers