title: A biosensor utilizing quince (Cydonia vulgaris) tissue homogenate for dopamine determination in pharmaceutical preparations.
abstract: Dopamine is a hormone and neurotransmitter occurring in a wide variety of animals, including both vertebrates and invertebrates. Chemically, it is a phenethylamine. Dopamine can be supplied as a medication that acts on the sympathetic nervous system, producing effects such as increased heart rate and blood pressure. However, since dopamine cannot cross the blood-brain barrier, dopamine given as a drug does not directly affect the central nervous system. To increase the amount of dopamine in the brains of patients with diseases such as Parkinson's disease and Dopa-Responsive Dystonia, L-DOPA (levodopa), which is the precursor of dopamine, can be given because it can cross the blood-brain barrier. In this study, a biosensor based on quince tissue homogenate was constructed for determination of dopamine. For the best results, some optimization studies such as the amount of quince tissue homogenate, gelatin and glutaraldehyde percentage, optimum temperature and pH were carried out. A linear range from 5 microM to 200 microM dopamine was obtained. Moreover, repeatability, and operational and storage stability of the biosensor were determined. Finally, the biosensor was applied to a real drug sample for the determination of dopamine content.
authors.affiliation: Ege University, Faculty of Science, Biochemistry Department, Izmir, Türkiye. msezginturk@hotmail.com
authors.forename: Mustafa Kemal
authors.initials: MK
authors.lastname: Sezgintürk
authors.forename: A Samil
authors.initials: AS
authors.lastname: Akin
authors.forename: Erhan
authors.initials: E
authors.lastname: Dinçkaya
mesh_terms: D001681:Biological Assay / Q000295:instrumentation*; D015374:Biosensing Techniques / Q000295:instrumentation*; D004298:Dopamine / Q000032:analysis* / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004364:Pharmaceutical Preparations / Q000032:analysis*; D010936:Plant Extracts / Q000737:chemistry*; D027824:Rosaceae / Q000737:chemistry*
chemical_list: D004364:Pharmaceutical Preparations; D010936:Plant Extracts; D004298:Dopamine