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Lamas Bervejillo M, Bonanata J, Franchini GR, Richeri A, Marqués JM, Freeman BA, Schopfer FJ, Coitiño EL, Córsico B, Rubbo H, Ferreira AM. A FABP4-PPARγ signaling axis regulates human monocyte responses to electrophilic fatty acid nitroalkenes. Redox Biol 2020; 29:101376. [PMID: 31926616 PMCID: PMC6926352 DOI: 10.1016/j.redox.2019.101376] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/14/2019] [Accepted: 11/06/2019] [Indexed: 02/07/2023] Open
Abstract
Nitro-fatty acids (NO2-FA) are electrophilic lipid mediators derived from unsaturated fatty acid nitration. These species are produced endogenously by metabolic and inflammatory reactions and mediate anti-oxidative and anti-inflammatory responses. NO2-FA have been postulated as partial agonists of the Peroxisome Proliferator-Activated Receptor gamma (PPARγ), which is predominantly expressed in adipocytes and myeloid cells. Herein, we explored molecular and cellular events associated with PPARγ activation by NO2-FA in monocytes and macrophages. NO2-FA induced the expression of two PPARγ reporter genes, Fatty Acid Binding Protein 4 (FABP4) and the scavenger receptor CD36, at early stages of monocyte differentiation into macrophages. These responses were inhibited by the specific PPARγ inhibitor GW9662. Attenuated NO2-FA effects on PPARγ signaling were observed once cells were differentiated into macrophages, with a significant but lower FABP4 upregulation, and no induction of CD36. Using in vitro and in silico approaches, we demonstrated that NO2-FA bind to FABP4. Furthermore, the inhibition of monocyte FA binding by FABP4 diminished NO2-FA-induced upregulation of reporter genes that are transcriptionally regulated by PPARγ, Keap1/Nrf2 and HSF1, indicating that FABP4 inhibition mitigates NO2-FA signaling actions. Overall, our results affirm that NO2-FA activate PPARγ in monocytes and upregulate FABP4 expression, thus promoting a positive amplification loop for the downstream signaling actions of this mediator.
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Affiliation(s)
- M Lamas Bervejillo
- Laboratorio de Inmunología, Instituto de Higiene, Facultad de Ciencias/Facultad de Química, Universidad de la República (UdelaR), Montevideo, CP 11600, Uruguay
| | - J Bonanata
- Laboratorio de Química Teórica y Computacional, Instituto de Química Biológica, Facultad de Ciencias, UdelaR, Montevideo, CP 11400, Uruguay; Centro de Investigaciones Biomédicas (CeInBio), UdelaR, Montevideo, CP 11800, Uruguay
| | - G R Franchini
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Argentina
| | - A Richeri
- Laboratorio de Biología Celular, Departamento de Neurofarmacología Experimental, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, CP 11600, Uruguay
| | - J M Marqués
- Laboratorio de Investigación en Vacunas, Departamento de Desarrollo Biotecnológico, Instituto de Higiene, Facultad de Medicina, UdelaR, Montevideo, CP 11600, Uruguay
| | - B A Freeman
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - F J Schopfer
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - E L Coitiño
- Laboratorio de Química Teórica y Computacional, Instituto de Química Biológica, Facultad de Ciencias, UdelaR, Montevideo, CP 11400, Uruguay; Centro de Investigaciones Biomédicas (CeInBio), UdelaR, Montevideo, CP 11800, Uruguay.
| | - B Córsico
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Facultad de Ciencias Médicas, Universidad Nacional de La Plata, La Plata, Argentina
| | - H Rubbo
- Centro de Investigaciones Biomédicas (CeInBio), UdelaR, Montevideo, CP 11800, Uruguay; Departamento de Bioquímica, Facultad de Medicina, UdelaR, Montevideo, CP 11800, Uruguay
| | - A M Ferreira
- Laboratorio de Inmunología, Instituto de Higiene, Facultad de Ciencias/Facultad de Química, Universidad de la República (UdelaR), Montevideo, CP 11600, Uruguay.
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Espinosa-García J, Coitiño EL, González-Lafont A, Lluch JM. Reaction-Path and Dual-Level Dynamics Calculations of the CH3F + OH Reaction. J Phys Chem A 1998. [DOI: 10.1021/jp9832138] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Espinosa-García
- Departamento de Química Física, Universidad de Extremadura, 06071 Badajoz, Spain, Laboratorio de Química Teórica y Computacional, Facultad de Ciencias, Universidad de la República, Montevideo, 11200, Uruguay, and Departament de Química, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - E. L. Coitiño
- Departamento de Química Física, Universidad de Extremadura, 06071 Badajoz, Spain, Laboratorio de Química Teórica y Computacional, Facultad de Ciencias, Universidad de la República, Montevideo, 11200, Uruguay, and Departament de Química, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - A. González-Lafont
- Departamento de Química Física, Universidad de Extremadura, 06071 Badajoz, Spain, Laboratorio de Química Teórica y Computacional, Facultad de Ciencias, Universidad de la República, Montevideo, 11200, Uruguay, and Departament de Química, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - J. M. Lluch
- Departamento de Química Física, Universidad de Extremadura, 06071 Badajoz, Spain, Laboratorio de Química Teórica y Computacional, Facultad de Ciencias, Universidad de la República, Montevideo, 11200, Uruguay, and Departament de Química, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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