Methods of measuring enzyme activity ex vivo and in vivo

Y Ou, RE Wilson, SG Weber - Annual Review of Analytical …, 2018 - annualreviews.org
Enzymes catalyze a variety of biochemical reactions in the body and, in conjunction with
transporters and receptors, control virtually all physiological processes. There is great value …

Electroosmotic perfusion, external microdialysis: Simulation and experiment

MT Rerick, J Chen, SG Weber - ACS Chemical Neuroscience, 2023 - ACS Publications
Information about the rates of hydrolysis of neuropeptides by extracellular peptidases can
lead to a quantitative understanding of how the steady-state and transient concentrations of …

Electrokinetic convection-enhanced delivery of solutes to the brain

AH Faraji, AS Jaquins-Gerstl, AC Valenta… - ACS chemical …, 2020 - ACS Publications
Pressure-induced infusion of solutions into brain tissue is used both in research and in
medicine. In medicine, convection enhanced delivery (CED) may be used to deliver agents …

Temperature-based on-column solute focusing in capillary liquid chromatography reduces peak broadening from pre-column dispersion and volume overload when …

SR Groskreutz, AR Horner, SG Weber - Journal of Chromatography A, 2015 - Elsevier
On-column focusing is essential for satisfactory performance using capillary scale columns.
On-column focusing results from generating transient conditions at the head of the column …

Electroosmotic perfusion–microdialysis probe created by direct laser writing for quantitative assessment of leucine enkephalin hydrolysis by insulin-regulated …

RE Wilson, A Jaquins-Gerstl, J Chen, M Rerick… - Analytical …, 2020 - ACS Publications
There are many processes that actively alter the concentrations of solutes in the extracellular
space. Enzymatic reactions, either by soluble enzymes or membrane-bound ectoenzymes …

Electrokinetic infusions into hydrogels and brain tissue: Control of direction and magnitude of solute delivery

AH Faraji, AS Jaquins-Gerstl, AC Valenta… - Journal of neuroscience …, 2019 - Elsevier
Background Delivering solutes to a particular region of the brain is currently achieved by
iontophoresis for very small volumes and by diffusion from a microdialysis probe for larger …

Electroosmosis based novel treatment approach for cerebral edema

T Wang, S Kleiven, X Li - IEEE Transactions on Biomedical …, 2020 - ieeexplore.ieee.org
Objective: Cerebral edema characterized as an abnormal accumulation of interstitial fluid
has not been treated effectively. We propose a novel edema treatment approach to drive …

Higher aminopeptidase activity determined by electroosmotic push–pull perfusion contributes to selective vulnerability of the hippocampal CA1 region to oxygen …

Y Ou, SG Weber - ACS chemical neuroscience, 2017 - ACS Publications
It has been known for over a century that the hippocampus, the center for learning and
memory in the brain, is selectively vulnerable to ischemic damage, with the CA1 being more …

Development of μ-Low-Flow-Push–Pull Perfusion Probes for Ex Vivo Sampling from Mouse Hippocampal Tissue Slices

MR Cabay, A McRay, DE Featherstone… - ACS Chemical …, 2018 - ACS Publications
This work demonstrates a reduced tip μ-low-flow-push–pull perfusion technique for ex vivo
sampling of the extracellular space of mouse hippocampal brain slices. Concentric fused …

Numerical modeling of electroosmotic push–pull perfusion and assessment of its application to quantitative determination of enzymatic activity in the extracellular …

Y Ou, SG Weber - Analytical chemistry, 2017 - ACS Publications
Many sampling methods have been developed to measure the extracellular concentrations
of solutes in the extracellular space of mammalian tissue, eg, brain. However, few have …