title: Electrochemical and piezoelectric quartz crystal detection of antisperm antibody based on protected Au nanoparticles with a mixed monolayer for eliminating nonspecific binding.
abstract: The detection of antisperm antibody (AsAb) by electrochemical method based on Au nanoparticles with a mixed monolayer for eliminating nonspecific binding is presented. Impedance spectroscopy is used to characterize the modified procedures, the immobilization of sperm antigen (SpAg) and binding of AsAb in the presence of [Fe (CN)(6)](3-/4-). In addition, piezoelectric quartz crystal, PQC, was used to analyze the immobilization quantity of Au nanoparticles as well as to optimize experimental conditions. The change of electron-transfer resistance was correlated with the concentration of AsAb in a range from 25 to 600 mU/ml with the detection limit of 10 mU/ml. The analytical results of several human serum samples using the developed technique are in satisfactory agreement with those given by the enzyme-linked immunosorbent assay (ELISA) method.
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
authors.forename: Guangyu
authors.initials: G
authors.lastname: Shen
authors.forename: Shuzhen
authors.initials: S
authors.lastname: Tan
authors.forename: Huagui
authors.initials: H
authors.lastname: Nie
authors.forename: Guoli
authors.initials: G
authors.lastname: Shen
authors.forename: Ruqin
authors.initials: R
authors.lastname: Yu
mesh_terms: D000327:Adsorption; D000906:Antibodies / Q000032:analysis* / Q000276:immunology; D000954:Antigens, Surface / Q000737:chemistry / Q000276:immunology; D003176:Complement C3 / Q000276:immunology; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004797:Enzyme-Linked Immunosorbent Assay; D005227:Fatty Acids / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D017979:Gold Colloid / Q000737:chemistry; D006801:Humans; D008297:Male; D049329:Nanostructures / Q000737:chemistry*; D010169:Palmitic Acids / Q000737:chemistry; D010316:Particle Size; D011791:Quartz / Q000737:chemistry*; D012709:Serum Albumin / Q000276:immunology; D013094:Spermatozoa / Q000276:immunology*; D013438:Sulfhydryl Compounds / Q000737:chemistry
chemical_list: C505222:11-mercaptoundecanoic acid; C450319:16-mercaptohexadecanoic acid; D000906:Antibodies; D000954:Antigens, Surface; D003176:Complement C3; D005227:Fatty Acids; D017979:Gold Colloid; D010169:Palmitic Acids; D012709:Serum Albumin; D013438:Sulfhydryl Compounds; D011791:Quartz; D006046:Gold; C501433:1,6-hexanedithiol