Immunoproteasomal processing of isoLG-adducted proteins is essential for hypertension
Metadatos
Mostrar el registro completo del ítemAutor
de la Visitación, Néstor; Chen, Wei; Krishnan, Jaya; Van Beusecum, Justin P.; Amarnath, Venkataraman; Hennen, Elizabeth M.; Zhao, Shilin; Saleem, Mohammad; Ao, Mingfang; Dikalov, Sergey I.; Dikalova, Anna E.; Harrison, David G.; Patrick, David M.Editorial
American Heart Association, Inc., by Wolters Kluwer Health, Inc.
Materia
Hypertension Immunoproteasome Isolevuglandins Inflammation Antigen presentation
Fecha
2024Referencia bibliográfica
de la Visitación, N., Chen, W., Krishnan, J., Van Beusecum, J. P., Amarnath, V., Hennen, E. M., Zhao, S., Saleem, M., Ao, M., Dikalov, S. I., Dikalova, A. E., Harrison, D. G., & Patrick, D. M. (2024). Immunoproteasomal processing of isoLG-adducted proteins is essential for hypertension. Circulation Research. https://doi.org/10.1161/CIRCRESAHA.123.324066
Patrocinador
This work was supported by National Institutes of Health grants R35HL140016 and R01AG076785 (Harrison), and D.G. Harrison was supported by the Veterans Affairs grant BX005866. D.M. Patrick was supported by the Veterans Affairs Biomedical Laboratory Research Career Development Award IK2BX005376. N. de la Visitación was supported by an American Heart Association postdoctoral fellowship (915301). J.P. van Beusecum was supported by Veterans Affairs Biomedical Laboratory Research Career Development Award 1IK2BX005605-01. S.I. Dikalov was supported by National Institutes of Health grants R01HL144943 and R01HL157583. S.I. Dikalova was supported by the National Institutes of Health grant R01HL157583 and the American Heart Association Transformation Project Award 23TPA1077648. M. Saleem was supported by the American Heart Association Career Development Award 23CDA1053072.Resumen
Isolevuglandins (isoLGs) are highly reactive lipid peroxidation products that rapidly adduct to proteins, generating neoantigens that promote immune activation in hypertension. In this study, the authors investigate the role of immunoproteasomal processing in the handling of isoLG-adducted proteins and its contribution to blood pressure elevation. Using genetic and pharmacological approaches in experimental models of hypertension, they demonstrate that efficient immunoproteasomal activity is required for antigen processing and subsequent activation of adaptive immune responses. Disruption of immunoproteasome function attenuated hypertension, reduced vascular and renal inflammation, and limited immune cell infiltration, indicating that defective processing of isoLG-modified proteins dampens pathogenic immune signaling. These findings identify the immunoproteasome as a critical mediator linking oxidative stress, antigen presentation, and immune-driven hypertension, highlighting its potential as a therapeutic target. Las isolevuglandinas (isoLGs) son productos altamente reactivos de la peroxidación lipídica que se unen rápidamente a proteínas, generando neoantígenos capaces de activar respuestas inmunitarias implicadas en la hipertensión. En este trabajo se analiza el papel del procesamiento inmunoproteasómico de proteínas aductadas con isoLG y su contribución a la elevación de la presión arterial. Mediante aproximaciones genéticas y farmacológicas en modelos experimentales de hipertensión, se demuestra que una actividad inmunoproteasómica eficiente es necesaria para el procesamiento antigénico y la posterior activación de la respuesta inmune adaptativa. La alteración de la función del inmunoproteasoma atenúa la hipertensión, reduce la inflamación vascular y renal y limita la infiltración de células inmunes, lo que sugiere que un procesamiento defectuoso de las proteínas modificadas por isoLG disminuye la señalización inmunopatogénica. En conjunto, estos resultados identifican al inmunoproteasoma como un elemento clave que conecta el estrés oxidativo, la presentación antigénica y la hipertensión mediada por mecanismos inmunitarios y lo señalan como una posible diana terapéutica.





