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Synthesis and Characterization of Poly(ethylene furanoate)/Poly(ε-caprolactone) Block Copolymers.
J Am Soc Mass Spectrom
January 2025
Laboratory of Chemistry and Technology of Polymers and Colors, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece.
Biobased poly(ethylene furanoate) (PEF)/poly(ε-caprolactone) (PCL) block copolymers have been synthesized using ring opening polymerization (ROP) of ε-caprolactone (ε-CL) in the presence of PEF in different mass ratios. An increase in intrinsic viscosity is observed for the block copolymers with higher ε-CL content due to the extension of their macromolecular chain. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MS) was employed to understand the composition and structure of the produced block copolymers.
View Article and Find Full Text PDFPulsed Ultrasound-Mediated Drug Delivery Enhancement Through Human Sclera.
Transl Vis Sci Technol
January 2025
Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China.
Purpose: The purpose of this study was to characterize whether pulsed ultrasound (PUS) affects transscleral drug delivery.
Methods: Fluorescein sodium (NaF, 376 Da) and fluorescein isothiocyanate-conjugated dextran 40 (FD-40, 40 kDa) were used as model drugs. Human sclera grafts were placed in modified Franz diffusion cells and were treated by PUS (1 megahertz [MHz], 0.
Characterization and functional analysis of type III polyketide synthases in Selaginella moellendorffii.
Planta
January 2025
Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, Shandong, China.
The evolutionary conservation of type III polyketide synthases (PKS) in Selaginella has been elucidated, and the critical amino acid residues of the anther-specific chalcone synthase-like enzyme (SmASCL) have been identified. Selaginella species are the oldest known vascular plants and a valuable resource for the study of metabolic evolution in land plants. Polyketides, especially flavonoids and sporopollenin precursors, are essential prerequisites for plant land colonization.
View Article and Find Full Text PDFBiomarkers.
Alzheimers Dement
December 2024
Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, USA.
Background: Highly specific ATN plasma biomarker assays for neurodegenerative diseases have been developed, but their associations with cognition vary in different populations. Kidney disease, common in diabetes, may decrease the predictive precision of those biomarkers. The aim of this study was to characterize for the first time the relationships between plasma ATN biomarkers and cognitive function in adults with T1D.
View Article and Find Full Text PDFBiomarkers.
Alzheimers Dement
December 2024
Memory and Aging Center, Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA.
Background: Diagnosing sporadic early-onset AD (EOAD, age-at-onset<65) is challenging: in the multi-center Longitudinal Early-onset Alzheimer's Disease Study, ∼25% of patients with clinically diagnosed EOAD are amyloid-PET-negative. Here we used FDG-PET to characterize the heterogeneity of hypometabolic profiles in these patients and better identify underlying etiologies.
Method: Seventy-four amyloid-PET-negative patients with clinical diagnosis of sporadic EOAD (MCI or mild dementia stage) underwent FDG-PET.
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