Azadirachtin-A from Impacts Multiple Biological Targets in Cotton Bollworm .

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ID: 21772
2019
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Abstract
Azadirachtin-A (AzaA) from the Indian neem tree () has insecticidal properties; however, its molecular mechanism remains elusive. The "targeted and nontargeted proteomic profiling", metabolomics, matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) imaging, gene expression, and in silico analysis provided clues about its action on . Fourth instar larvae fed on AzaA-based diet (AzaD) suffered from significant mortality, growth retardation, reduced larval mass, complications in molting, and prolonged development. Furthermore, death of AzaD-fed larvae was observed with various phenotypes like bursting, blackening, and half-molting. Liquid chromatography-mass spectrometry (LC-MS) data showed limited catabolic processing of ingested AzaA and dramatic alternations of primary metabolism in . MALDI-TOF imaging indicated the presence of AzaA in midgut of . In the gut, out of 79 proteins identified, 34 were upregulated, which were related to digestion, immunity, energy production, and apoptosis mechanism. On the other hand, 45 proteins were downregulated, including those from carbohydrate metabolism, lipid metabolism, and energy transfer. In the hemolymph, 21 upregulated proteins were reported to be involved in immunity, RNA processing, and mRNA-directed protein synthesis, while 7 downregulated proteins were implicated in energy transfer, hydrolysis, lipid metabolism, defense mechanisms, and amino acid storage-related functions. Subsequently, six target proteins were identified using labeled AzaA that interacted with whole insect proteins. In silico analysis suggests that AzaA could be efficiently accommodated in the hydrophobic pocket of juvenile hormone esterase and showed strong interaction with active site residues, indicating plausible targets of AzaA in . Quantitative polymerase chain reaction analysis suggested differential gene expression patterns and partly corroborated the proteomic results. Overall, data suggest that AzaA generally targets more than one protein in and hence could be a potent biopesticide.
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dawkar2019azadirachtinaacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Dawkar, Vishal V;Barage, Sagar H;Barbole, Ranjit S;Fatangare, Amol;Grimalt, Susana;Haldar, Saikat;Heckel, David G;Gupta, Vidya S;Thulasiram, Hirekodathakallu V;Svatoš, Aleš;Giri, Ashok P;
Journal ACS omega
Year 2019
DOI
10.1021/acsomega.8b03479
URL
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