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This study aimed to isolate and identify three prenylflavonoids (cannflavin A, B, and C) from leaves using different chromatographic techniques. The potential of the isolated compounds against SARS-CoV-2 was suggested through several analysis. Structural similarity studies against nine co-crystallized ligands of SARS-CoV-2's proteins indicated the similarities of the isolated cannflavins with the SARS-CoV-2 Papain-Like Protease (PLP) ligand, . Then, flexible allignment study confirmed this similarity. Docking experiments showed successful binding of all cannflavins within the active pocket of PLP, with energies comparable to . Among them, cannflavin A demonstrated the most similar binding mode, while cannflavin C exhibited the best energy. Molecular dynamics (MD) simulations and MM-GPSA confirmed the accurate binding of cannflavin A to the PLP. ADMET studies indicated favourable drug-like properties for all three compounds, suggesting their potential as anti-SARS-CoV-2 agents. Further and investigations are necessary to validate these findings and establish their efficacy and safety profiles.
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http://dx.doi.org/10.1080/14786419.2023.2294111 | DOI Listing |
Vaccine
September 2025
International Center for Excellence in Research (ICER), Faculty of Medicine and Odontostomatology (FMOS), Faculty of Pharmacy (FAPH), University Clinical Research Center (UCRC), University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali.
Background: This prospective study aimed to evaluate the dynamics and seroprevalence of anti-SARS-CoV-2 antibodies in a cohort of vaccinated and unvaccinated health workers (HWs) in Bamako, Mali. The study also measured antibody responses as a function of SARS-CoV-2 infections, socio-demography, vaccination status and associated comorbidities.
Method: 685 vaccinated and 413 unvaccinated HWs (total = 1098) were monitored over a 15-month periods with follow-up visits every 3 months for the first 6 months and a final visit after 15 months.
Pharmaceuticals (Basel)
August 2025
Department of Pathogen Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China.
Coronavirus disease 2019 (COVID-19) has been a global pandemic since 2019, but effective therapeutic treatments for it remain limited. Shuqing Granule (SG) is a traditional Chinese medicine containing ingredients such as indirubin, shinpterocarpin, naringenin, and quercetin. It exhibits anti-inflammatory and antiviral activities as well as broad-spectrum antiviral effects, yet its potential role in the treatment of COVID-19 remains unclear.
View Article and Find Full Text PDFPathogens
August 2025
Programa de Pós-Graduação em Ciências da Saúde, Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30.130-100, Minas Gerais, Brazil.
Urine-based immunoassay is a non-invasive method with demonstrated utility in detecting anti-SARS-CoV-2 antibodies in unvaccinated patients with COVID-19. To evaluate urine's potential for serological surveys in a real-world setting, SARS-CoV-2 serology was performed on urine samples from vaccinated individuals, both with and without prior confirmed COVID-19. (1) Methods: An in-house indirect ELISA was used to measure antibodies against recombinant spike (S) and nucleocapsid (N) proteins of SARS-CoV-2 in urine and paired serum from 149 individuals vaccinated with Janssen AD26.
View Article and Find Full Text PDFPathogens
August 2025
Department of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Manila, Manila 1000, Philippines.
Natural products possess a wide range of biological and biochemical potentials, with plant-derived compounds being significant sources for discovering new drugs. In this study, extracts of and prepared with different solvents were tested for their antiviral activity against the original SARS-CoV-2 Wuhan strain and its variants using plaque assay, quantitative real time RT-PCR, and immunofluorescence assay (IFA). Our results showed that at their maximum non-toxic concentrations, Vitex-Dichloromethane (DCM) and Macaranga extracts significantly inhibited SARS-CoV-2 Wuhan strain growth in Vero E6 cells, showing a 5-log reduction in plaque assay and confirmed by IFA.
View Article and Find Full Text PDFChem Biodivers
August 2025
Department of Pharmaceutical Sciences, School of Pharmacy, University of Puerto Rico - Medical Sciences Campus, San Juan, Puerto Rico, USA.
The continual emergence of new severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants, as well as unwanted side effects, limited worldwide availability, and risk of drug resistance from approved antivirals, continue to limit the effectiveness of coronavirus disease 2019 treatment. To continue to uncover natural products (NPs) that can inhibit validated biochemical targets of coronaviruses, we focused on a subset of brown algae extracts from Puerto Rico that demonstrated potential anti-SARS-CoV-2 activity through selective disruption of the viral Spike-receptor binding domain (RBD) to the host angiotensin-converting enzyme-2 (ACE2) cellular entry receptor, which in turn led to further evaluation of a Lobophora variegata organic extract. Employing bioassay-guided fractionation and modern NPs dereplication tools, we quickly identified fucoxanthin as an active constituent with selective inhibitory activity against spike-RBD/ACE-2 binding while also exhibiting moderate potency in vitro toward pseudo-virus-infected VERO cells.
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