The crystal structure of a glycosyl-ated porphyrin () system, CHNO, where two iso-propyl-idene protected galactose moieties are attached to the position of a substituted tetra-aryl porphyrin is reported. This structure reveals that the parent porphyrin is planar, with the galactose moieties positioned above and below the porphyrin macrocycle. This orientation likely prevents porphyrin-porphyrin H-type aggregation, potentially enhancing its efficiency as a photosensitizer in photodynamic therapy. Notable non-bonding C-H⋯O and C-H⋯π inter-actions among adjacent systems are observed in this crystal network. Additionally, the tolyl groups of each porphyrin can engage in π-π inter-actions with the delocalized π-systems of neighboring porphyrins.
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http://dx.doi.org/10.1107/S2414314624010289 | DOI Listing |
IUCrdata
October 2024
Department of Chemistry, Kuwait University, PO Box 5969, Safat 13060, Kuwait.
The crystal structure of a glycosyl-ated porphyrin () system, CHNO, where two iso-propyl-idene protected galactose moieties are attached to the position of a substituted tetra-aryl porphyrin is reported. This structure reveals that the parent porphyrin is planar, with the galactose moieties positioned above and below the porphyrin macrocycle. This orientation likely prevents porphyrin-porphyrin H-type aggregation, potentially enhancing its efficiency as a photosensitizer in photodynamic therapy.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China. Electronic address:
In order to cope with the massive tissue bleeding caused by sudden trauma and the demand for bioengineering materials with adjustable wet adhesion properties, this study formed the first layer of network by adding galactomannan (GG) and collagen (Col) structure, and then use the Fe-urushiol (UH) redox system to activate free radicals to initiate the polymerization of acrylic acid (AA) to quickly form an interpenetrating double network hydrogel. The cis hydroxyl group in GG and the hydroxyl group of UH form dynamic covalent borate ester bonds with borate ions in the borax solution, and use their responsiveness to pH to control the catechol group to achieve controllable adhesion. UH and Fe endowed the hydrogel with excellent antibacterial ability, while adding Col enhanced the mechanical properties of the hydrogel.
View Article and Find Full Text PDFMolecules
October 2024
Department of Earth and Environmental Sciences DISAT, Università degli Studi di Milano-Bicocca, Piazza della Scienza 1, 20126 Milan, Italy.
Sodium-glucose co-transporter 1 (SGLT1) is primarily expressed on the membrane of enterocytes, a type of epithelial cell found in the intestines, where it mediates the unidirectional absorption of glucose and galactose. Beyond its well-established role in nutrient absorption, SGLT1 also plays a protective role in maintaining the integrity of the intestinal barrier. Specifically, the natural ligand of SGLT1 (d-glucose) and a synthetic -glucoside developed by our group can induce a protective anti-inflammatory effect on the intestinal epithelium.
View Article and Find Full Text PDFInt J Mol Sci
September 2024
Department of Chemistry, Case Western Reserve University, 2080 Adelbert Road, Cleveland, OH 44106, USA.
The potential of chimeric antigen receptor (CAR)-based immunotherapy as a promising therapeutic approach is often hindered by the presence of highly immunosuppressive tumor microenvironments (TME). Combination therapies with either co-administration or built-in expression of additional TME-modulating therapeutic molecules to potentiate the functions of CAR-T cells can cause systemic toxicities due to the lack of control over the delivery of biologics. Here, we present a proof-of-concept engineered platform in human Jurkat T cells that combines CAR with a therapeutic gene circuit capable of sensing -galactosidase (a reported cancer-associated signal) and subsequently activate the production of customized therapeutic gene products.
View Article and Find Full Text PDFBioconjug Chem
October 2024
Department of Life Science and Technology, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8501, Japan.
Prodrug-type oligonucleotides (prodrug-ONs) are a class of oligonucleotide designed for activation under specific intracellular conditions or external stimuli. Prodrug-ONs can be activated in the target tissues or cells, thereby reducing the risk of adverse effects. In this study, we synthesized prodrug-type oligodeoxynucleotides activated by β-galactosidase, an enzyme that is overexpressed in cancer and senescent cells.
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