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| Pàgina inicial > Articles > Articles publicats > Electronegative LDL Promotes Inflammation and Triglyceride Accumulation in Macrophages |
| Data: | 2020 |
| Resum: | Electronegative low-density lipoprotein (LDL) (LDL(-)), a modified LDL that is present in blood and exerts atherogenic effects on endothelial cells and monocytes. This study aimed to determine the action of LDL(-) on monocytes differentiated into macrophages. LDL(-) and in vitro-modified LDLs (oxidized, aggregated, and acetylated) were added to macrophages derived from THP1 monocytes over-expressing CD14 (THP1-CD14). Then, cytokine release, cell differentiation, lipid accumulation, and gene expression were measured by ELISA, flow cytometry, thin-layer chromatography, and real-time PCR, respectively. LDL(-) induced more cytokine release in THP1-CD14 macrophages than other modified LDLs. LDL(-) also promoted morphological changes ascribed to differentiated macrophages. The addition of high-density lipoprotein (HDL) and anti-TLR4 counteracted these effects. LDL(-) was highly internalized by macrophages, and it was the major inductor of intracellular lipid accumulation in triglyceride-enriched lipid droplets. In contrast to inflammation, the addition of anti-TLR4 had no effect on lipid accumulation, thus suggesting an uptake pathway alternative to TLR4. In this regard, LDL(-) upregulated the expression of the scavenger receptors CD36 and LOX-1, as well as several genes involved in triglyceride (TG) accumulation. The importance and novelty of the current study is that LDL(-), a physiologically modified LDL, exerted atherogenic effects in macrophages by promoting differentiation, inflammation, and triglyceride-enriched lipid droplets formation in THP1-CD14 macrophages, probably through different receptors. |
| Ajuts: | Instituto de Salud Carlos III PI16-00471 Instituto de Salud Carlos III CB07-08-0016 Instituto de Salud Carlos III RD16-0019-0010 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1149 |
| Nota: | Altres ajuts: This research was funded by grants 158/U/2017 from Fundacio La Marato TV3. |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | HDL ; TLR4 ; Electronegative LDL ; Foam cells ; Inflammation ; Lipid droplets ; Macrophages ; Scavenger receptors ; Triglycerides |
| Publicat a: | Cells, Vol. 9 Núm. 3 (january 2020) , ISSN 2073-4409 |
20 p, 4.6 MB |