AI Article Synopsis
Article Abstract
Co-delivery of photosensitizers and synergistic agents by one single nanoplatform is interesting for enhancing photodynamic therapy (PDT) of cancer. Here, a multifunctional nanoplatform for enhanced photodynamic therapy and magnetic resonance imaging of cancer was constructed. The poly (lactide-co-glycolide) (PLGA) nanoparticles (NPs) loaded with hematoporphyrin monomethyl ether (HMME) were coated with multifunctional manganese dioxide (MnO) shells, which were designed as PLGA/HMME@MnO NPs. Once the NPs were effectively taken up by tumor cells, the intracellular HO was catalysed by the MnO shells to generate O. Meanwhile, the higher glutathione (GSH) promoted the degradation of MnO into Mn ions with the ability of magnetic resonance (MR) imaging. After the degradation of outer layer, the release of photosensitizer was promoted. Under irradiation, the released HMME produced cytotoxic reactive oxygen species (ROS) to damage the tumor cells when the O was generated in the hypoxic tumor site. Furthermore, the decreased GSH level further inhibited the consumption of the produced ROS, which greatly enhanced the PDT efficacy. Therefore, this study suggested that this multifunctional system has the potential for enhanced photodynamic therapy and magnetic resonance imaging.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.colsurfb.2016.10.039 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A DIY Bioreactor for in Situ Metabolic Tracking in 3D Cell Models via Hyperpolarized C NMR Spectroscopy.
Anal Chem
January 2025
Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), 08028 Barcelona, Spain.
Nuclear magnetic resonance (NMR) spectroscopy is a valuable diagnostic tool limited by low sensitivity due to low nuclear spin polarization. Hyperpolarization techniques, such as dissolution dynamic nuclear polarization, significantly enhance sensitivity, enabling real-time tracking of cellular metabolism. However, traditional high-field NMR systems and bioreactor platforms pose challenges, including the need for specialized equipment and fixed sample volumes.
View Article and Find Full Text PDFProton-Induced Switching of Paramagnetism: Reversible Conversion between a Low and High Spin Co Center within a Heterobimetallic Core.
J Am Chem Soc
January 2025
Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697, United States.
The development of molecular species with switchable magnetic properties has been a long-standing challenge in chemistry. One approach involves binding an analyte, such as protons, to a compound to trigger a change in magnetism. Transition metal complexes have been targeted for this type of magnetic modulation because they can undergo changes in their spin states.
View Article and Find Full Text PDFA distributed subcortical circuit linked to instrumental information-seeking about threat.
Proc Natl Acad Sci U S A
January 2025
Wellcome Centre for Integrative Neuroimaging, Department of Experimental Psychology, University of Oxford, Oxford OX1 3TA, United Kingdom.
Daily life for humans and other animals requires switching between periods of threat- and reward-oriented behavior. We investigated neural activity associated with spontaneous switching, in a naturalistic task, between foraging for rewards and seeking information about potential threats with 7T fMRI in healthy humans. Switching was driven by estimates of likelihood of threat and reward.
View Article and Find Full Text PDFDisease-State Dependent Associations Between Intrinsic Brain Function and Symptoms of Fatigue, Depression, and Anxiety in Crohn's Disease.
Inflamm Bowel Dis
January 2025
Department of General Psychiatry, Center for Psychosocial Medicine, Heidelberg University Hospital, Heidelberg University, Heidelberg, Germany.
Background: Extraintestinal symptoms (EIS) in inflammatory bowel diseases, including fatigue, depression and anxiety, are highly prevalent, but poorly understood. Alterations of brain function may contribute to EIS, but their association with disease activity is unclear. This study analyzed intrinsic neural activity (INA) of individuals with Crohn's disease (CD) in different disease states and examined the relationship between INA and EIS.
View Article and Find Full Text PDFFormulation and evaluation of PVA-based composite hydrogels: physicochemical, leachables, and immunogenicity studies.
J Mater Chem B
January 2025
School of Pharmacy, Queen's University Belfast, Belfast BT9 7AF, UK.
This study explores the formulation and characterization of poly(vinyl alcohol) (PVA)-based composite hydrogels synthesized through solid-state crosslinking. Comprehensive assessments were conducted on their physicochemical properties, leachables, and immunogenicity. Swelling experiments demonstrated that the incorporation of poly(vinylpyrrolidone) (PVP) enhanced water retention, while chitosan had a minimal effect on swelling behavior.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!