Elucidation of larvicidal potential of metallic and environment friendly food-grade nanostructures against Aedes albopictus.
Toqeer AhmedIrfan LiaqatMuhammad Zeeshan HyderShaheen AkhtarAssad Hafeez BhattiShahid Bilal ButtZahid ImranTayyaba YasminShabbar AbbasPublished in: Environmental geochemistry and health (2020)
To combat health challenges associated with mosquito-borne diseases, the larvicidal activity of metallic nanoparticles, food-grade polymeric nano-capsules and insecticides was investigated against larvae of Aedes albopictus as an effective alternate control approach. The Ae. albopictus was identified using sequencing and phylogenetic analyses of COXI, CYTB and ITS2 genes. The characterization of synthesized nanostructures was performed through Zetasizer, UV-VIS spectroscopy, atomic force microscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy. The mosquito larvae were exposed to varying concentration of nanostructures and insecticides, and their percentage mortality was evaluated at different time intervals of 24 h and 48 h exposure. The highest efficacy was observed in zinc oxide nanoparticles (ZnO-NPs) and polymeric nanocapsules FG-Cur E-III (LC50 = 0.24 mg/L, LC90 = 0.6 mg/L) and (LC50 = 3.8 mg/L, LC90 = 9.33 mg/L), respectively, after 24 h; while (LC50 = 0.18 mg/L, LC90 = 0.43 mg/L) and (LC50 = 1.95 mg/L, LC90 = 6.46 mg/L), respectively, after 48 h against fourth instar larvae of Ae. albopictus. Ag, CuO, NiTiO3 and CoTiO3 nanoparticles evaluated in this study also showed promising larvicidal activity. Although ZnO-NPs proved to be effective larvicides, their possible toxicity (producing ROS species) can limit their use. The curcumin nanostructures (FG-Cur E-III) stabilized by food-grade materials are thought to exert their larvicidal activity by binding to sterol carrier protein-2, and depriving the larvae from the essential dietary cholesterol, and bears effective larvicidal potential as safe alternative for chemical larvicides, due to their environment friendly, food-grade and easy biodegradability.
Keyphrases
- aedes aegypti
- zika virus
- dengue virus
- oxide nanoparticles
- simultaneous determination
- electron microscopy
- human health
- mass spectrometry
- high resolution
- atomic force microscopy
- solid phase extraction
- public health
- drug delivery
- cardiovascular disease
- oxidative stress
- quantum dots
- mental health
- gene expression
- tandem mass spectrometry
- single cell
- highly efficient
- high speed
- computed tomography
- genome wide
- dna damage
- dna methylation
- cardiovascular events
- gold nanoparticles
- coronary artery disease
- gas chromatography
- magnetic resonance
- reactive oxygen species
- health information
- dual energy
- binding protein