Data/hora: 23/09/2024 04:58:09

Biblioteca(s): 	Embrapa Hortaliças; Embrapa Instrumentação.	
Data corrente: 	18/11/2021	
Data da última atualização: 	23/01/2024	
Autoria: 	PETRÔNIO, M. S.; BARROS-ALEXANDRINO, T. T.; LIMA, A. M. F.; ASSIS, O. B. G. de; INOUE-NAGATA, A. K.; NAKASU, E. Y. T.; TIERA, M. J.; PILON, L.	
Afiliação: 	ODILIO BENEDITO GARRIDO DE ASSIS, CNPDIA; ALICE KAZUKO INOUE NAGATA, CNPH; ERICH YUKIO TEMPEL NAKASU, CNPH; LUCIMEIRE PILON, CNPH.	
Título: 	Physicochemical and toxicity investigation of chitosan-based dsRNA nanocarrier formation.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	Biointerface Research in Applied Chemistry, vol. 12, n. 4, 2022.	
Páginas: 	5266 - 5279	
DOI: 	https://doi.org/10.33263/BRIAC124.52665279	
Idioma: 	Inglês	
Conteúdo: 	Technologies involving the use of double-stranded RNA (dsRNA) to elicit RNA interference (RNAi) in pest control have emerged as an alternative to traditional pesticides. RNAi can mediate natural cell protection being a promising tool to provide prompt responses in plant defense against pathogens. The present study is focused on the physicochemical characterization of formed dsRNAloaded nanoparticles as a result of chitosan-dsRNA ionic interactions. Additionally, a preliminary investigation was conducted of the in-vitro toxicity of loaded nanoparticles in lettuce and human red blood cells. dsRNA molecules, homologous to partial phytopathogenic tomato mosaic virus (ToMV) sequence, were used as a model. The main groups involved in the chitosan-dsRNA ionic coupling were identified by Fourier-transform infrared spectroscopy, and the stability of formed nanoparticles was accessed by dynamic light scattering, electrophoresis, and thermal analyses. The chitosan showed a higher ability to bind to dsRNA at low charge ratios (N/P = 1), ruled by positively charged chitosan methyl groups and negatively charged phosphate groups from the RNA backbone, resulting in small nanoparticles (73.25 nm size) at low polydispersity (0.25). The toxic assays of these particles, on lettuce seeds and in human erythrocytes, revealed very low toxicity demonstrating their safety as a platform, thereby holding potential use as biodefensive for crop protection.	
Palavras-Chave: 	Chitosan nanocarrier; DsRNA phytotoxicity assay; Tomato mosaic virus (ToMV).	
Thesaurus Nal: 	Double-stranded RNA; Lettuce; RNA interference; Tomato mosaic virus.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/232647/1/P-Physicochemical-and-Toxicity-Investigation-of-Chitosanbased-dsRNA-Nanocarrier-Formation.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/227886/1/20695837124.526652791.pdf	
Registro original: 	Embrapa Instrumentação (CNPDIA)	
Exemplares: 	CNPH - (41598-1) - UPC - AP - DD -  -  -  - DIS
CNPDIA - (17938-1) - UPC - AP - DD - PROCI.22/08 -  - 2022/08 - DIS