In this work we discuss a new label-free biosensing device based on indium tin oxide (ITO) overlaid section of a multimode optical fiber fused silica core. The sensor has been used to optical measurements also simultaneously interrogated electrochemically (EC). Due to optimized thickness and optical properties of ITO film, a lossy-mode resonance (LMR) could be observed in the optical domain, where electrical properties of the film allowed for application of the sensor as a working electrode in an EC setup. It has been confirmed that the LMR response depends on optical properties of the external medium, as well as potential applied to the electrode during cyclic voltammetry. After the ITO surface functionalization with amine groups and covalently attached biotin, the device has been applied for label-free biosensing of avidin in both the domains simultaneously. On the example of biotin-avidin detection system it was demonstrated that when avidin concentration increases a decrease in current and increase in LMR wavelength shift were recorded in EC and optical domain, respectively. Both optical and EC responses follow the protein interaction process, and thus can be used as cross-verification of the readouts. Moreover, an extended information has been achieved comparing to solely EC interrogation, i.e., the grafting process of biotin and avidin was directly monitored optically displaying individual steps of an incubation procedure.

• MeSH
• Avidin chemistry   isolation & purification   MeSH
• Biosensing Techniques * MeSH
• Biotin chemistry   isolation & purification   MeSH
• Electrochemical Techniques * MeSH
• Electrodes MeSH
• Optics and Photonics MeSH
• Tin Compounds chemistry   MeSH
• Publication type
• Journal Article MeSH

Tento projekt je zaměřen na zkoumání klinických, neuroradiologických a biochemických biomarkerů Parkinsonovy nemoci (PN), parkinsonských syndromů a Wilsonovy nemoci (WN). Všechni pacienti budou vyšetřeni před nasazením terapie pomocí klinických škál, neuropsychologické baterie, zobrazení mozku magnetickou rezonancí (MRI mozku), transkraniální sonografie (TCS) a analýzy krve/mozkomíšního moku. Prediktivní hodnota těchto biomarkerů bude zhodnocena vzhledem ke klinickému stavu pacientů 9 měsíců, 3 roky a 5 let po zahájení léčby. Dále bude stanovena senzitivita a specificita MRI, TCS a biochemických biomarkerů v diferenciální diagnostice PN. U dlouhodobě léčených pacientů s WN budeme zkoumat vztah mezi typem ATP7B mutace, enzymatickou aktivitou ceruloplasminu, stupněm jaterní léze a způsobem léčby a tíží reziduálních neurologických příznaků a neuroradiologickými nálezy. Pomocí MRI-histopatologické korelační studie plánujeme potvrdit validitu MRI ve stanovení koncentrace kovů v bazálních gangliích a kvantifikaci stupně neurodegenerace v substantia nigra pars compacta.; This project is aimed at examining clinical, neuroradiological and biochemical biomarkers of Parkinson’s disease (PD), other parkinsonian syndromes and Wilson’s disease (WD). All patients will be examined using clinical scales, cognitive battery, brain magnetic resonance imaging (MRI), transcranial sonography (TCS) and blood/cerebrospinal fluid (CSF) analysis before treatment initiation. Predicitive values of these biomarkers will be assesed with regards to clinical outcome at 9 months, 3 years and 5 years after treatment initiation. We will also examine the sensitivity/specificity of MRI, TCS and blood/CSF biomarkers in the differential diagnosis of PD. In chronically treated WD patients we will examine whether the type of ATP7B mutation, ceruloplasmin activity, hepatic dysfunction or mode of treatment will predict clinical outcome and neuroradiological parameters. Post-mortem MRI-histopathology correlation study will be performed to validate MRI data in measuring metal concentration in basal ganglia as well as in quantification of neuronal loss in substantia nigra pars compacta.

• MeSH
• Biomarkers MeSH
• Hepatolenticular Degeneration diagnostic imaging   MeSH
• Humans MeSH
• Magnetic Resonance Imaging MeSH
• Neurodegenerative Diseases diagnostic imaging   MeSH
• Parkinsonian Disorders diagnostic imaging   MeSH
• Disease Progression MeSH
• Severity of Illness Index MeSH
• Treatment Outcome MeSH
• Check Tag
• Humans MeSH

• Conspectus
• Patologie. Klinická medicína
• NML Fields
• neurologie
• NML Publication type
• závěrečné zprávy o řešení grantu AZV MZ ČR