title: Development of a dual-aptamer-based multiplex protein biosensor.
abstract: Parallel biosensors for proteins are becoming more essential for the thorough and systematic investigation of complex biological processes. These tools also enable improved clinical diagnoses relative to single-protein analyses due to their greater information content. If implemented correctly, affinity-based techniques can provide unique advantages in terms of sensitivity and flexibility. Aptamers are increasingly being used as the affinity reagents of choice for protein biosensing applications. Here, we describe the development and characterization of an aptamer-based method for parallel protein analyses that relies on recognition of the target protein by two unique aptamers targeting different epitopes on the protein. Our results show that the technique achieved simultaneous and quantitative detection of thrombin and platelet-derived growth factor-BB (PDGF-BB) with high specificity both in buffered solutions and in serum samples.
authors.affiliation: Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824-1226, USA.
authors.forename: Shengnan
authors.initials: S
authors.lastname: Xie
authors.forename: S Patrick
authors.initials: SP
authors.lastname: Walton
mesh_terms: D000818:Animals; D052157:Aptamers, Nucleotide / Q000235:genetics; D001483:Base Sequence; D000077214:Becaplermin; D015374:Biosensing Techniques / Q000379:methods*; D002417:Cattle; D000939:Epitopes / Q000737:chemistry; D006801:Humans; D055767:Immobilized Proteins; D010982:Platelet-Derived Growth Factor / Q000032:analysis / Q000737:chemistry / Q000276:immunology; D016133:Polymerase Chain Reaction; D011506:Proteins / Q000032:analysis* / Q000737:chemistry / Q000276:immunology; D020574:Proto-Oncogene Proteins c-sis; D013917:Thrombin / Q000032:analysis / Q000737:chemistry / Q000276:immunology
chemical_list: D052157:Aptamers, Nucleotide; D000939:Epitopes; D055767:Immobilized Proteins; D010982:Platelet-Derived Growth Factor; D011506:Proteins; D020574:Proto-Oncogene Proteins c-sis; D000077214:Becaplermin; D013917:Thrombin