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de Araújo, Mykaella Andrade; dos Santos Júnior, Erivaldo Davi; dos Santos, Bruna Priscila; dos Santos, Ygor Daniel Ramos; Paulino, Pedro Augusto Tibúrcio; dos Santos, Elane Conceição; Souza, Tayhana Priscila Medeiros; Anhezini, Lucas; Bassi, Ênio José; Duzzioni, Marcelo; de Castro, Olagide Wagner; de Andrade, Tiago Gomes; Dornelas, Camila Braga; Gitaí, Daniel Leite Góes
Chemico-biological interactions, 03/2024, Letnik: 391Journal Article
Layered double hydroxides (LDHs) have been employed as nano-sized carriers for therapeutic/bio-active molecules, including small interfering RNAs (siRNAs). However, the potential of LDHs nanoparticles for an efficient and safe antisense oligonucleotide (AMO) delivery still requires studies. In this research, we have tested the suitability of a Mg–Al-LDH-based nanocarrier loaded with a miRNA-196b-5p inhibitor. LDHs (and LDH-Oligo complex) were synthesized by the coprecipitation method followed by physicochemical characterization as hydrodynamic size, surface charge, crystallinity, and chemical groups. Thymic endothelial cell line (tEnd.1) were transfected with LDH-Oligo and were evaluated for i. cell viability by MTT, trypan blue, and propidium iodide assays; ii. transfection efficiency by flow cytometry, and iii. depletion of miRNA-196b-5p by RT-qPCR. In addition, Drosophila melanogaster larvae were fed LDHs and evaluated for: i. larval motility; ii. pupation rate; iii. larval-pupal transition; iv. lethality, and v. emergence rate. We demonstrated that LDHs nanoparticles are stable in aqueous solutions and exhibit a regular hexagonal shape. The LDH-AMO complex showed a transfection efficiency of 93.95 ± 2.15 % and induced a significant depletion of miRNA-196b-5p 48h after transfection. No cytotoxic effects were detected in tEnd.1 cells at concentrations up to 50 μg/ml, as well as in Drosophila exposed up to 500 μg of LDH. In conclusion, our data suggest that LDHs are biocompatible and efficient carriers for miRNA inhibitors and can be used as a viable and effective tool in functional miRNA inhibition assays. •Mg-Al-LDH nanoparticles are biocompatible to t.End cells and Drosophila melanogaster.•Mg-Al-LDH nanoparticles are effective in delivering microRNA inhibitors to cells.•The complex Mg-Al-LDH and miR-196b inhibitor modulate efficient gene expression knockdown.
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