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Nanotechnology is making exceptional progress in the medical field. The development of new systems for the delivery of plant ingredients brings benefits such as good bioavailability, solubility, sustained release, and enhanced potential. To the best of our knowledge, there is no report on nanocomposites from Tetrapleura tetraptera despite its wide range of ethnopharmacological uses including management of inflammatory diseases. This study aimed to prepare chitosan- and cellulose-based nanocomposites with anti-inflammatory potential. The biocomposites showed an encapsulation efficiency of 69.4%. Their formation was confirmed by a peak at 290 nm in UV–Vis. Infrared spectrophotometry proved the formation of a mixed polysaccharide and polyphenol system. No signs of toxicity and no deaths were found; therefore, the lethal dose 50 (LD50) is higher than 2000 mg/kg. The biocomposite has an anti-inflammatory activity in vitro with a maximum inhibition of 99.5% and an anti-inflammatory activity in vivo with a maximum inhibition of 98.7% for a dose of 200 mg/kg. The synthesized biocomposites from the aqueous extract of the fruits of Tetrapleura tetraptera showed an anti-inflammatory property with satisfactory safety. [ABSTRACT FROM AUTHOR]

A novel 1,2,4-triazole intermediate 5-pyridin-2-yl-1H-[1,2,4]triazole-3-carboxylic acid ethyl ester was prepared by the reaction of N'-aminopiridyne-2-carboximidamine and an excess monoethyl oxalyl chloride and screened for biological activities. The compound was structurally characterized by nuclear magnetic resonance spectroscopy, elemental analysis, infrared spectroscopy, and single-crystal X-ray diffraction. Bioassays indicated that the compound exhibits potent anti-inflammation activity in vitro. An egg albumin denaturation assay to assess the anti-inflammatory effect of the synthesized compound showed a significant inhibition of protein with a maximum inhibition of 71.1% at the highest tested concentration (1000 µg/mL) compared to 81.3% for Aspirin as standard drug. The antimalarial activity on the 3D7 P. falciparum strain was determined to be IC50 176 µM and was obtained prior to connection with pharmacophoric groups. [ABSTRACT FROM AUTHOR]

Many infectious diseases including malaria, lymphatic filariasis, chikungunya and dengue are transmitted by mosquitoes. Understanding the entomological diversity in a given area is critical for defining health risks, but also to design and evaluate control measures. Our study aimed to establish an entomological database of the Culicidae fauna in two clusters (Nyalla and Kambo) in the city of Douala in Cameroon. A longitudinal study was conducted from August to December in the Nyalla and Kambo neighbourhoods in the city of Douala. Culicidae larvae were weekly collected and reared until adult emergence. Adults were then morphologically identified using reference identification keys. A total of 20 breeding sites were productive out of an approximately 90 sites prospected. Water collections, pits, swamps and cinder blocks were main categories of larval habitats. In total, 2125 mosquito larvae were collected and reared during the survey. A total of 1790 mosquito adults emerged and were further identified and distributed among three genera: Culex (73.3%); Anopheles (22.6%) and Aedes (4.1%). Eleven Culicidae species were identified: Culex duttoni, Cx. descens, Cx. poicilipes, Cx. univittatus, Cx tigripes, Cx. antennatus, Cx. simpsoni, Cx. pipiens, Anopheles gambiae sl, Aedes aegypti and Ae. albopictus. Culex duttoni (39%) and An. gambiae s.l. (22.6%) were the main species recorded. The equitability, species richness and abundance of these genera was influenced by the nature of breeding sites and physical parameters including rainfall and temperature. The present study provides insights on the entomological diversity of the Culicidae fauna in the study area. Such information will help to orientate the fight against mosquito vectors in conjunction with the species and the types of breeding sites. [ABSTRACT FROM AUTHOR]