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Catatonia is one of the most severe psychiatric syndromes, and clinical symptoms and etiology are very heterogeneous. When accompanied by autonomic instability and hyperthermia it’s termed malignant catatonia, which left untreated is associated with significant morbidity and mortality. First-line treatment is high dose benzodiazepines, followed by electroconvulsive therapy (ECT), in case of non-response.
View Article and Find Full Text PDFReductive Activation of Artefenomel (OZ439) by Fe(II)-Heme, Related to Its Antimalarial Activity.
ACS Infect Dis
January 2025
Laboratoire de Chimie de Coordination du CNRS, LCC-CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France.
The 1,2,4-trioxolane antimalarial drug, OZ439 (artefenomel), exhibits cross-resistance to artemisinins with similar survival rates of artemisinin-resistant parasites after dihydroartemisinin or OZ439 exposure, suggesting that this drug shares some mechanisms of action with artemisinins. In this way, we investigated the reductive activation of OZ439 by heme in the presence of dithionite, demonstrating the formation of covalent heme-drug adducts. However, in the presence of the biologically abundant reductant glutathione instead of dithionite, heme-drug adducts were not detected, contrary to artemisinin that efficiently alkylates heme regardless of the reductant used.
View Article and Find Full Text PDFAnti-inflammatory supramolecular hydrogel loaded chicoric acid based on graphene oxide modified hyaluronic acid and polyethylene glycol for rheumatoid arthritis treatment.
Int J Biol Macromol
December 2024
DUKE-NUS Medical School, National University of Singapore, 169857, Singapore.
Chicoric acid (CA) as one of Chinese medicines had anti-inflammatory, less gastrointestinal irritation, less drug-resistance and low cost properties compared with chemical synthesized drug and biologics for rheumatoid arthritis (RA) treatment. To make CA preciously and effectly RA therapy, we firstly developed a supramolecular hydrogel (GHCAP) comprising β-cyclodextrin and graphene oxide (GO) modified hyaluronic acid (CD-HA-GO) as the "host" polymer and adamantane-modified four-arm polyethylene glycol (PEG-AD) as the "guest" polymer, and then the CA was loaded into the supramolecular hydrogel (DGHCAP). The results showed that DGHCAP exhibited injectable, high modulus, high CA loading rate (43.
View Article and Find Full Text PDFDrug resistance and possible therapeutic options against influenza A virus infection over past years.
Arch Microbiol
November 2024
CAS Key Laboratory of Molecular Virology and Immunology, Institutional Center for Shared Technologies and Facilities, Pathogen Discovery and Big Data Platform, Shanghai Institute of Immunity and Infection, Chinese Academy of Sciences, No. 320 Yueyang Road, Shanghai, 200031, China.
Influenza A virus infection, commonly known as the flu, has persisted in the community for centuries. Although we have yearly vaccinations to prevent seasonal flu, there remains a dire need for antiviral drugs to treat active infections. The constantly evolving genome of the influenza A virus limits the number of effective antiviral therapeutic options.
View Article and Find Full Text PDFRevolutionizing Influenza Treatment: A Deep Dive into Targeted Drug Delivery Systems.
Curr Pharm Biotechnol
October 2024
Department of Pharmaceutical Technology, School of Medical Sciences, Adamas University, Kolkata -700126.
Influenza, a highly transmissible respiratory infection caused by influenza viruses A and B, poses a persistent threat to global public health due to its high mutation rate, ability to develop resistance to existing antiviral drugs, and capacity for rapid spread. Current treatment options, including four main classes of antiviral agents-adamantanes, neuraminidase inhibitors, RNA-dependent RNA polymerase inhibitors, and polymerase acidic endonuclease inhibitors- are limited by the emergence of drug-resistant viral strains, non-specific drug distribution, and adverse side effects. Moreover, the effectiveness of traditional vaccines is often compromised by antigenic drift and shift, necessitating the development of alternative therapeutic strategies.
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