A New Lignanamide Derivative and Bioactive Constituents of Lycium chinense
A new lignanamide derivative, lycichinenamide (1), has been isolated from the root barks ofLycium chinense together with nine known compounds, lyciumamide H (2), 5,2 ′-dihydroxy-6,7,8,6′-tetramethoxyflavone (3), 7α,8β-3 ′-O-methylcedrusin (4), smiglabrol (5),trans-N-caffeoyltyramine (6), vanillic acid (7), syringic acid (8), 2,6-dimethoxy-1,4-benzoquinone (9), and 1,5-dihydroxy-2-isoprenyl-3-methoxyxanthone (10). The structure of the new compound1 was determined through spectroscopic and MS analyses. Among the isolates, lycichinenamide (1), lyciumamide H (2), smiglabrol (5), andtrans-N-caffeoyltyramine (6) showed potent inhibition with IC50 values of 18.5 ± 2.1, 21.8 ± 1.8, 12.4 ± 0.3, and 24.6 ± 2.0 μM, respectively, against LPS-induced NO generation. In addition, 1,5-dihydroxy-2-isoprenyl-3-methoxyxanthone (10) exhibited anti-Dengue virus activity with IC50 value of 22.4 ± 1.6 μM against Dengue virus serotype 2 strain PL046.
Publication date: 14–20 December 2019Source: The Lancet, Volume 394, Issue 10215Author(s): Annelies Wilder-Smith, Stefan Flasche, Peter G Smith
Publication date: 14–20 December 2019Source: The Lancet, Volume 394, Issue 10215Author(s): Basu Dev Pandey, Anthony Costello
Publication date: 14–20 December 2019Source: The Lancet, Volume 394, Issue 10215Author(s): Mohammed A Mamun, Jannatul Mawa Misti, Mark D Griffiths, David Gozal
Publication date: 14–20 December 2019Source: The Lancet, Volume 394, Issue 10215Author(s): Thais Helena dos Santos, Jose L San Martin, Luis G Castellanos, Marcos A Espinal
This study aimed to compare the replicative fitness of the four dengue virus serotypes and understand the association between the serotypes, their in vitro infection ability, and their replication in target cells. We used three isolates of each DENV serotype to infect Huh-7 cells at an MOI of 0.5. The percentage of infected cells was evaluated by flow cytometry, cell viability was evaluated by MTT assay, and the pathogenicity index was calculated as a ratio of both parameters. The replicative fitness was measured by the number of viral genome copies produced using quantitative PCR and the production of infectious viral pro...
Conclusionsthe applicability of the developed methodology to predict the dynamic behaviour of deaths caused by traffic injuries in Colombia for 2010 by means of a probabilistic random walk was confirmed with a good precision, suggesting that this methodology could be useful to verify the efficacy of national road safety strategies implemented to reduce mortality rates.
Publication date: Available online 12 December 2019Source: BiologicalsAuthor(s): Hebleen Brenes, Gilbert D. Loría, Bruno LomonteAbstractSecreted phospholipase A2 (sPLA2) molecules are small, calcium-dependent enzymes involved in many biological processes. Viperid venoms possess gIIA sPLA2s and sPLA2-like proteins, both having homology to human gIIA sPLA2, an innate immunity enzyme. We evaluated the antiviral action of Mt–I (catalytically-active sPLA2) and Mt-II (catalytically-inactive variant) isolated from the venom of Bothrops asper, against a diverse group of viruses. Yellow Fever and Dengue (enveloped) vir...
On 1 May 2019, in response to increasing numbers of dengue fever cases in Pakistan and India, health authorities in Afghanistan heightened monitoring for the disease. As part of this increased vigilance, the Central Public Health Laboratory (CPHL) in Kabul began to broaden its investigation for possible cases of the disease, such as reviewing samples that tested negative for Crimean-Congo Hemorrhagic Fever (CCHF) to see if they were positive for dengue. The laboratory performed differential diagnosis and tests on 40 samples that had tested negative for Crimean-Congo Hemorrhagic Fever (CCHF). Between 1 October to 4 December...
Shalendra Singh, Saurabh Khurana, Navdeep Sethi, Ankur KhandelwalJournal of Anaesthesiology Clinical Pharmacology 2019 35(4):568-569
ConclusionsThese results suggest that bothkdr mutations and metabolic resistance mechanisms are present in Laos but their impact on phenotypic resistance may differ in proportion at the population or individual level. Molecular analyses suggest that CNV affectingCCEAE3A previously associated with temephos resistance is also associated with malathion resistance while CNV affectingCYP6BB2 andCYP6P12 are associated with pyrethroid and possibly DDT resistance. The presence of high levels of insecticide resistance in the main arbovirus vector in Laos is worrying and may have important implications for dengue vector control in the country.