2026-06-04T03:20:52Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/353022026-03-11T07:21:47Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Aliaga-Gaspar, Pablo author Brichette Mieg, Isabel author Fernández-Arjona, María del Mar author Rodríguez-Bada, José Luis author Lopez-Moreno, Yolanda author Serrano-Castro, Pedro Jesús author Fernández Fernández, Oscar author Ciano-Petersen, Nicolas Lundahl author Oliver-Martos, Begoña author 2024 The soluble type I IFN receptor (sIFNAR2) is produced by alternative splicing and is present in body fluids. Although it can modulate IFN-ß activity, its biological role remains unknown. Methods: An in-silico study was conducted to compare the structure of recombinant human soluble IFNAR2 (r sIFNAR2) with its native form. The antiviral activity of r-sIFNAR2, produced in BL21-bacteria and CHO cells, was tested using a cytopathic effect assay including appropriate controls. Viability and toxicity were assessed by MTT assays. Proteomic analysis using mass spectrometry was conducted in the A549/EMCV bioassay to elucidate the mechanism of action, and then it was validated by Western blot. Results: The BL21-sIFNAR2 had a sequence identity of 83.6 % with the native form, showing variations only in terminal regions. BL21-sIFNAR2 and CHO-sIFNAR2 showed significantly higher percentage of cell viability compared to the viral control, similar to IFN-ß. Cell viability with BL21-sIFNAR2 was comparable to the cell control across all tested concentrations. Proteomic analysis revealed an up regulation of pathways related with autophagy (macroautophagy, autophagy, pexophagy, and mitophagy) with an SQSTM1 overexpression that was then confirmed by Western Blot, espe cially after virus infection. However, pathways related to interferon signaling, and antiviral mechanisms mediated by IFN-stimulated genes were down-regulated. Conclusion: r-sIFNAR2 exhibits significant antiviral activity regardless of the expression system used for its production and good safety profile, suggesting its use as a potential antiviral drug. Proteins related to autophagy are involved in the protection from the virus. This study highlights the biological relevance of soluble cytokine receptors as effectors so far overlooked Pablo Aliaga-Gaspar, Isabel Brichette-Mieg, MdM Fernández-Arjona, José Luis Rodríguez-Bada, Yolanda López-Moreno, Pedro Serrano-Castro, Oscar Fernández-Fernández, Nicolás Lundahl Ciano-Petersen, Begoña Oliver-Martos, Recombinant soluble type I interferon receptor exerts antiviral activity by inducing proteins related to autophagy, Biomedicine & Pharmacotherapy, Volume 181, 2024, 117678, ISSN 0753-3322, https://doi.org/10.1016/j.biopha.2024.117678. https://hdl.handle.net/10630/35302 https://doi.org/10.1016/j.biopha.2024.117678 Farmacología Medicina Interferón Receptores celulares Recombinant soluble type I interferon receptor exerts antiviral activity by inducing proteins related to autophagy