Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Cardiovascular System
Simultaneous Uplc–Ms/Ms Analysis Of Two Stable Isotope Labeled Versions Of Sucrose In Mouse Plasma And Brain Samples As Markers Of Blood-Brain Barrier Permeability And Brain Vascular Space, Ekram Ahmed Chowdhury, Saad Alqahtani, Raktima Bhattacharya, Reza Mehvar, Ulrich Bickel
Simultaneous Uplc–Ms/Ms Analysis Of Two Stable Isotope Labeled Versions Of Sucrose In Mouse Plasma And Brain Samples As Markers Of Blood-Brain Barrier Permeability And Brain Vascular Space, Ekram Ahmed Chowdhury, Saad Alqahtani, Raktima Bhattacharya, Reza Mehvar, Ulrich Bickel
Pharmacy Faculty Articles and Research
Blood Brain Barrier (BBB) permeability is frequently compromised in the course of diseases affecting the central nervous system (CNS). Sucrose is a low molecular weight, hydrophilic marker with low permeability at the naive BBB and therefore one of the widely used indicators of barrier integrity. Our laboratory recently developed a highly sensitive UPLC-MS/MS method for stable isotope labelled [13C12]sucrose in biological matrices. Correction of total brain concentration for contribution of intravascular space is required in such experiments in order to accurately measure BBB permeability, and it is often accomplished by vascular perfusion with buffer solutions prior to brain sampling. The …
Dextran-Methylprednisolone Succinate As A Prodrug Of Methylprednisolone: Plasma And Tissue Disposition, Xiaoping Zhang, Reza Mehvar
Dextran-Methylprednisolone Succinate As A Prodrug Of Methylprednisolone: Plasma And Tissue Disposition, Xiaoping Zhang, Reza Mehvar
Pharmacy Faculty Articles and Research
Plasma and tissue disposition of a macromolecular prodrug of methylprednisolone (MP), dextran (70 kDa)–methylprednisolone succinate (DMP), was studied in rats. Single 5‐mg/kg doses of DMP or unconjugated MP were administered into the tail veins of different groups of rats (n = 4/group/time point). Blood (cardiac puncture) and tissues (liver, spleen, kidney, heart, lung, thymus, and brain) were collected at various times after DMP (0–96 h) or MP (0–2 h) injections. Concentrations of DMP and MP in samples were analyzed by size‐exclusion chromatography (SEC) and reversed‐phase high‐performance liquid chromatography (HPLC), respectively. Conjugation of MP with 70‐kDa dextran resulted in 22‐, …
Stereospecific Pharmacokinetics And Pharmacodynamics Of Beta-Adrenergic Blockers In Humans, Reza Mehvar, Dion R. Brocks
Stereospecific Pharmacokinetics And Pharmacodynamics Of Beta-Adrenergic Blockers In Humans, Reza Mehvar, Dion R. Brocks
Pharmacy Faculty Articles and Research
The beta-blockers comprise a group of drugs that are mostly used to treat cardiovascular disorders such as hypertension, cardiac arrhythmia, or ischemic heart disease. Each of these drugs possesses at least one chiral center, and an inherent high degree of enantioselectivity in binding to the b-adrenergic receptor. For beta-blockers with a single chiral center, the (-) enantiomer possesses much greater affinity for binding to the b-adrenergic receptors than antipode. The enantiomers of some of these drugs possess other effects, such as antagonism at alpha-adrenergic receptors or Class III antiarrhythmic activity. However, these effects generally display a lower level of stereoselectivity …