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Abdalla HB, Puhl L, Rivas CA, Wu YC, Rojas P, Trindade-da-Silva CA, Hammock BD, Maddipati KR, Soares MQS, Clemente-Napimoga JT, Kantarci A, Napimoga MH, Van Dyke TE. Modulating the sEH/EETs Axis Restrains Specialized Proresolving Mediator Impairment and Regulates T Cell Imbalance in Experimental Periodontitis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:433-445. [PMID: 38117781 PMCID: PMC10866374 DOI: 10.4049/jimmunol.2300650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 11/26/2023] [Indexed: 12/22/2023]
Abstract
Epoxyeicosatrienoic acids (EETs) and other epoxy fatty acids are short-acting lipids involved in resolution of inflammation. Their short half-life, due to its metabolism by soluble epoxide hydrolase (sEH), limits their effects. Specialized proresolving mediators (SPMs) are endogenous regulatory lipids insufficiently synthesized in uncontrolled and chronic inflammation. Using an experimental periodontitis model, we pharmacologically inhibited sEH, examining its impact on T cell activation and systemic SPM production. In humans, we analyzed sEH in the gingival tissue of periodontitis patients. Mice were treated with sEH inhibitor (sEHi) and/or EETs before ligature placement and treated for 14 d. Bone parameters were assessed by microcomputed tomography and methylene blue staining. Blood plasma metabololipidomics were carried out to quantify SPM levels. We also determined T cell activation by reverse transcription-quantitative PCR and flow cytometry in cervical lymph nodes. Human gingival samples were collected to analyze sEH using ELISA and electrophoresis. Data reveal that pharmacological sEHi abrogated bone resorption and preserved bone architecture. Metabololipidomics revealed that sEHi enhances lipoxin A4, lipoxin B4, resolvin E2, and resolvin D6. An increased percentage of regulatory T cells over Th17 was noted in sEHi-treated mice. Lastly, inflamed human gingival tissues presented higher levels and expression of sEH than did healthy gingivae, being positively correlated with periodontitis severity. Our findings indicate that sEHi preserves bone architecture and stimulates SPM production, associated with regulatory actions on T cells favoring resolution of inflammation. Because sEH is enhanced in human gingivae from patients with periodontitis and connected with disease severity, inhibition may prove to be an attractive target for managing osteolytic inflammatory diseases.
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Affiliation(s)
- Henrique B. Abdalla
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
- Faculdade São Leopoldo Mandic, Campinas, SP, Brazil
| | - Luciano Puhl
- Faculdade São Leopoldo Mandic, Campinas, SP, Brazil
| | - Carla Alvarez Rivas
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
- Harvard School of Dental Medicine, Boston, MA, USA
| | - Yu-Chiao Wu
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
- Harvard School of Dental Medicine, Boston, MA, USA
| | - Paola Rojas
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
| | | | - Bruce D. Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, CA, USA
| | | | | | | | - Alpdogan Kantarci
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
| | | | - Thomas E. Van Dyke
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA, USA
- Department of Oral Medicine, Infection, and Immunity, Faculty of Medicine, Harvard University, Boston, MA, USA
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Tarkany Basting R, Henrique Napimoga M, Antônio Trindade Silva C, Ballassini Abdalla H, Campos Durso B, Henrique Barboza Martins L, de Abreu Cavalcanti H, Hammock BD, Trindade Clemente-Napimoga J. Soluble epoxide hydrolase inhibitor blockage microglial cell activation in subnucleus caudalis in a persistent model of arthritis. Int Immunopharmacol 2023; 120:110320. [PMID: 37230034 PMCID: PMC10631565 DOI: 10.1016/j.intimp.2023.110320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/30/2023] [Accepted: 05/08/2023] [Indexed: 05/27/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic condition characterized by pain and infiltration of immune cells into the joint. Immune cells can be activated, producing inflammatory cytokines, leading to continuously degenerative and inflammatory reactions and the temporomandibular joint (TMJ) can be affected by RA. In this scenario, novel targets are needed to increase treatment efficacy with minimized side effects. The epoxy-eicosatrienoic acids (EETs), are endogenous signaling molecules, playing important roles in diminishing inflammation and pain but are promptly metabolized by soluble epoxide hydrolase (sEH), generating less-bioactive acids.Therefore, sEH inhibitors is an interest therapeutic target to enhance the beneficial effect of natural EETs. TPPU is a potent sEH inhibitor that is capable of dampening EETs hydrolysis. Thus, we aimed to assess the impact of pharmacological sEH inhibition on a persistent model of albumin-induced arthritis in the TMJ, in two scenarios: first, as post-treatment, in an installed arthritic condition, and second, the protective role, in preventing the development of an arthritic condition. In addition, we investigate the influence of sEH inhibition on microglia cell activation in the trigeminal subnucleus caudalis (TSC) and in vitro experiments. Finally, we examined the astrocyte phenotype. Oral administration of TPPU, acts in multiple pathways, in a protective and reparative post-treatment, ameliorating the preservation of the TMJ morphology, reducing the hypernociception, with an immunosuppressive action reducing neutrophil and lymphocytes and pro-inflammatory cytokines in the TMJ of rats. In TSC, TPPU reduces the cytokine storm and attenuates the microglia activated P2X7/Cathepsin S/Fractalkine pathway and reduces the astrocyte activation and glutamate levels. Collectively, our findings revealed that sEH inhibition mitigates hypersensitive nociception through the regulation of microglia activation and astrocyte modulation, demonstrating the potential use of sEH inhibitors as immunoresolvents in the treatment of autoimmune disorders.
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Affiliation(s)
- Rosanna Tarkany Basting
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research, United States
| | - Marcelo Henrique Napimoga
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research, United States
| | - Carlos Antônio Trindade Silva
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research, United States
| | - Henrique Ballassini Abdalla
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research, United States
| | - Braz Campos Durso
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research, United States
| | | | - Herbert de Abreu Cavalcanti
- São Leopoldo Mandic Institute and Research Center, Laboratory of Neuroimmune Interface of Pain Research, United States
| | - Bruce D Hammock
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, United States of America; EicOsis LLC, Davis, CA, United States of America
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Abdalla HB, Van Dyke TE. The impact of the soluble epoxide hydrolase cascade on periodontal tissues. FRONTIERS IN DENTAL MEDICINE 2023. [DOI: 10.3389/fdmed.2023.1129371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Periodontitis is a chronic inflammatory disease with complex pathogenesis. Uncontrolled inflammation is driven by the immune system in response to accumulation of oral biofilm that leads to alveolar bone loss, bleeding, increased periodontal probing depth with loss of attachment of the connective tissues to the tooth, and ultimately, tooth loss. Soluble epoxide hydrolase (sEH) is an enzyme that converts epoxy fatty acids (EpFAs) produced by cytochrome P450 (CYP450) to an inactive diol. It has been shown that EpFAs display important features to counteract an exaggerated inflammatory process. Based upon this observation, inhibitors of sEH have been developed and are being proposed as a strategy to regulate proinflammatory inflammatory lipid mediator production and the chronicity of inflammation. This mini review focuses on the impact of sEH inhibition on periodontal tissues focusing on the mechanisms involved. The interaction between Specialized Pro-Resolving Mediators and sEH inhibition emerges as a significant mechanism of action of sEH inhibitors that was not formerly appreciated and provides new insight into the role SPMs may play in prevention and treatment of periodontitis.
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