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Friday, July 24, 2020 | History

2 edition of Kinetic investigation of the dopamine transport system found in the catalog.

Kinetic investigation of the dopamine transport system

Susan Marie Meiergerd

Kinetic investigation of the dopamine transport system

by Susan Marie Meiergerd

  • 342 Want to read
  • 21 Currently reading

Published .
Written in English

    Subjects:
  • Dopaminergic mechanisms.,
  • Neural transmission.,
  • Chemical kinetics.,
  • Cocaine -- Physiological effect.

  • Edition Notes

    Statementby Susan Marie Meiergerd.
    The Physical Object
    Paginationxv, 146 leaves, bound :
    Number of Pages146
    ID Numbers
    Open LibraryOL17004584M

    More recent studies of the dopamine transporter have shown that the inward transport of a substrate such as amphetamine induces an inward current of sodium, which increases the concentration of internal cellular sodium at the transporter, thereby facilitating reverse transport of the dopamine (Goodwin et al., ; Pifl et al., ). The transport of dopamine across the blood brain barrier represents a challenge for the management of Parkinson’s disease. The employment of central nervous system targeted ligands functionalized nanocarriers could be a valid tactic to overcome this obstacle and avoid undesirable side effects. In this work, transferrin functionalized dopamine-loaded liposomes .

    Purchase Presynaptic Receptors and Neuronal Transporters - 1st Edition. Print Book & E-Book. ISBN , Further investigations into the fundamental properties of catecholamine transport were hindered by the lack of an in vitro system to study. Once methods to prepare synaptosomes were developed (), experiments could be designed to explore the uptake of EPI and NE in brain tissues (29,), thus allowing a more detailed investigation of the.

    For dopamine uptake the time to 80% decay of the dopamine signal (T80) was examined. dopamine signals were amplitude matched (ranging from to 1 μM dopamine) to ensure accurate measurement of dopamine uptake kinetics [52, 74]. Outliers were excluded via the Grubb’s test before averaging if the conditions for homogeneity of variance were met. Dopamine transporter (DAT) single-photon emission tomography (SPECT) with ()Ioflupane is a widely used diagnostic tool for patients with suspected parkinsonian syndromes, as it assists with differentiating between Parkinson’s disease (PD) or atypical parkinsonisms and conditions without a presynaptic dopaminergic deficit such as essential tremor, vascular and drug .


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Kinetic investigation of the dopamine transport system by Susan Marie Meiergerd Download PDF EPUB FB2

Our analysis in the heterologous expression system revealed distinct transport kinetic properties of hPMAT and hOCT3 toward endogenous monoamines. The relevance of these two transporters in clearing a specific monoamine in vivo will depend on their intrinsic transport efficiency for the amine and the abundance of the transporter in the relevant Cited by: Dopamine Transport Is Mediated by Multidrug and Toxin Extrusion (MATE) To examine whether dopamine is a substrate of MATE transporters, we carried out uptake experiments, which are frequently used to evaluate MATE transport properties [21,22,23,24,25].Significant uptake of [3 H]dopamine by human (h) MATE1 (Figure 1 a), hMATE2-K (Figure 1 a) and Cited by: 3.

Although the K m for DA transport by hSERT was substantially higher than that for 5HT transport, we noted that hSERT has a V max for DA transport which is 4–5 times higher than that for 5HT transport (Fig.

2, Table 1; t (7) = pCited by: The purpose of this investigation was to determine whether the increase in the dopamine (DA) concentration in the rat striatum after a rapid iv inject Cited by: 9. Therefore, what may appear from curve fitting by eye to be a saturable transport system for dopamine with a Km of about X M [see Solomon et al.

(28) ], is actually, upon statistical kinetic analysis, nonsaturable accumulation having the kinetic Cited by:   Human serum dopamine-β-hydroxylase: purification, molecular weight, presence of sugars and kinetic properties. Biochimie57 (), DOI: /S(75) Willi Weis. ASCORBIC ACID AND ELECTRON TRANSPORT.

The goal of this review is to describe what the voltammetry technique tells us about cocaine–dopamine transporter (DAT) interactions and the subsequent changes in extracellular dopamine levels in the brain.

The primary advantage of voltammetry, in this regard, is the capability for kinetic analysis in situ. Molecular modeling and dynamics simulations have been performed to study how cocaine inhibits dopamine transporter (DAT) for the transport of dopamine.

The computationally determined DAT−ligand binding mode is totally different from the previously proposed overlap binding mode in which cocaine- and dopamine-binding sites are the same (Beuming, T.; et al. Investigation of solubility and dissolution kinetics of conjugates by UV-VIS spectrophotometry.

To measure the solubility g of polymer-drug conjugate was immersed in 11 mL ultra-pure water. Samples were stirred at room temperature for 24 and 48 h. Neurotransmission within themesocorticolimbic dopamine system has remained the central focus of investigation into the molecular, those that block dopamine transport (e.g., cocaine, methylphenidate) and those that serve as substrates for transport [e.g., dopamine, amphetamine and 3,4-methylenedioxymethamphetamine (MDMA or “ecstasy.

Both dopamine transporter (DAT) and organic cation transporter 2 (OCT-2) plays a role in the transport of dopamine across the nasal mucosal tissues.

25 GBRa DAT inhibitor, and amantadine, an OCT-1 and 2 inhibitor, were used to examine the role of DAT and OCT-2 in DOPAC formation. Iproniazid ( µM), an MAO inhibitor, was used to. Kinetic models have been employed to understand the logic of substrate transport through transporters of the Solute Carrier (SLC) family.

All SLC transporters operate according to the alternate access model, which posits that substrate transport occurs in a closed loop of partial reactions (i.e., a transport cycle).

Kinetic models can help to find realistic estimates for. Introduction. The dopamine transporter (DAT) is a transmembrane protein that regulates dopaminergic signaling in the central nervous system. DATs help to modulate the concentration of extraneuronal dopamine by actively shuttling released transmitter molecules back across the plasma membrane into dopaminergic neurons, where they can be.

The detection of dopamine, an important neurotransmitter in the central nervous system, is relevant because low levels of dopamine can cause brain disorders.

Here, a novel electrochemical platform made of a hydrogel–graphene oxide nanocomposite was employed to electrochemically determine simultaneously dopamine (DA) and ascorbic acid.

Download Citation | Dopamine and the Dopaminergic Systems of the Brain | The great majority of dopaminergic neurons in the brain (in human ,–, cells) is. Based on calibration curves and Eq. 1, the diffusion coefficient for DA transfer with the presence of 2 mM AA was measured to be (±) × 10 −10 m 2 /s from multiple independent.

Cyclic Voltammetric Investigation of Dopamine at p-aminobenzoic Acid Modified Carbon Paste Electrode angachar 1, B.E Kumara Swamy 2,*. The neuronal membrane transporter for dopamine (DAT) is a member of the Na+ and Cl dependent family of transporters and concentrates dopamine intracellularly up to fold over extracellular levels.

Dopamine is a cationic natriuretic catecholamine synthesized in proximal tubular cells (PTCs) of the kidney before secretion into the lumen, a key site of its action. However, the molecular mechanisms underlying dopamine secretion into the lumen remain unclear. Multidrug and toxin extrusion (MATE) is a H+/organic cation antiporter that is highly expressed in the brush border.

Membrane Proteins. The lipid bilayer forms the basis of the cell membrane, but it is peppered throughout with various proteins.

Two different types of proteins that are commonly associated with the cell membrane are the integral proteins and peripheral protein ().As its name suggests, an integral protein is a protein that is embedded in the membrane.

Kitayama, S. et al. Dopamine transporter site-directed mutations differentially alter substrate transport and cocaine binding. Proc. Natl Acad. Sci. – ().Request PDF | Kinetic diversity of dopamine transmission in the dorsal striatum | Dopamine (DA), a highly significant neurotransmitter in the mammalian central nervous system.

High-repetition fast-scan cyclic voltammetry and chronoamperometry were used to quantify and characterize the kinetics of dopamine and dopamine-o-quinone adsorption and desorption at carbon-fiber microelectrodes.

A flow injection analysis system was used for the precise introduction and removal of a bolus of electroactive substance on a sub-second time .