Lipopolysaccharide (LPS) exposure to macrophages induces an inflammatory response, which is regulated at the transcriptional and post-transcriptional levels. HuR (ELAVL1) is an RNA-binding protein that regulates cytokines and chemokines transcripts containing AU/U-rich elements (AREs) and mediates the LPS-induced response. Here, we show that small-molecule tanshinone mimics (TMs) inhibiting HuR-RNA interaction counteract LPS stimulus in macrophages. TMs exist in solution in keto-enolic tautomerism, and molecular dynamic calculations showed the ortho-quinone form inhibiting binding of HuR to mRNA targets. TM activity was lost in vitro by blocking the diphenolic reduced form as a diacetate, but resulted in prodrug-like activity in vivo. RNA and ribonucleoprotein immunoprecipitation sequencing revealed that LPS induces a strong coupling between differentially expressed genes and HuR-bound genes, and TMs reduced such interactions. TMs decreased the association of HuR with genes involved in chemotaxis and immune response, including Cxcl10, Il1b and Cd40, reducing their expression and protein secretion in primary murine bone marrow-derived macrophages and in an LPS-induced peritonitis model. Overall, TMs show anti-inflammatory properties in vivo and suggest HuR as a potential therapeutic target for inflammation-related diseases.

HuR modulation counteracts lipopolysaccharide response in murine macrophages / Bonomo, Isabelle; Assoni, Giulia; La Pietra, Valeria; Canarutto, Giulia; Facen, Elisa; Donati, Greta; Zucal, Chiara; Genovese, Silvia; Micaelli, Mariachiara; Pérez-Ràfols, Anna; Robbiati, Sergio; Kontoyannis, Dimitris L; De Matteo, Marilenia; Fragai, Marco; Seneci, Pierfausto; Marinelli, Luciana; Arosio, Daniela; Piazza, Silvano; Provenzani, Alessandro. - In: DISEASE MODELS & MECHANISMS. - ISSN 1754-8403. - 16:3(2023), pp. 1-20. [10.1242/dmm.050120]

HuR modulation counteracts lipopolysaccharide response in murine macrophages

Bonomo, Isabelle
Primo
;
Assoni, Giulia;Facen, Elisa;Zucal, Chiara;Micaelli, Mariachiara;Robbiati, Sergio;Seneci, Pierfausto;Piazza, Silvano
Co-ultimo
;
Provenzani, Alessandro
Co-ultimo
2023-01-01

Abstract

Lipopolysaccharide (LPS) exposure to macrophages induces an inflammatory response, which is regulated at the transcriptional and post-transcriptional levels. HuR (ELAVL1) is an RNA-binding protein that regulates cytokines and chemokines transcripts containing AU/U-rich elements (AREs) and mediates the LPS-induced response. Here, we show that small-molecule tanshinone mimics (TMs) inhibiting HuR-RNA interaction counteract LPS stimulus in macrophages. TMs exist in solution in keto-enolic tautomerism, and molecular dynamic calculations showed the ortho-quinone form inhibiting binding of HuR to mRNA targets. TM activity was lost in vitro by blocking the diphenolic reduced form as a diacetate, but resulted in prodrug-like activity in vivo. RNA and ribonucleoprotein immunoprecipitation sequencing revealed that LPS induces a strong coupling between differentially expressed genes and HuR-bound genes, and TMs reduced such interactions. TMs decreased the association of HuR with genes involved in chemotaxis and immune response, including Cxcl10, Il1b and Cd40, reducing their expression and protein secretion in primary murine bone marrow-derived macrophages and in an LPS-induced peritonitis model. Overall, TMs show anti-inflammatory properties in vivo and suggest HuR as a potential therapeutic target for inflammation-related diseases.
2023
3
Bonomo, Isabelle; Assoni, Giulia; La Pietra, Valeria; Canarutto, Giulia; Facen, Elisa; Donati, Greta; Zucal, Chiara; Genovese, Silvia; Micaelli, Maria...espandi
HuR modulation counteracts lipopolysaccharide response in murine macrophages / Bonomo, Isabelle; Assoni, Giulia; La Pietra, Valeria; Canarutto, Giulia; Facen, Elisa; Donati, Greta; Zucal, Chiara; Genovese, Silvia; Micaelli, Mariachiara; Pérez-Ràfols, Anna; Robbiati, Sergio; Kontoyannis, Dimitris L; De Matteo, Marilenia; Fragai, Marco; Seneci, Pierfausto; Marinelli, Luciana; Arosio, Daniela; Piazza, Silvano; Provenzani, Alessandro. - In: DISEASE MODELS & MECHANISMS. - ISSN 1754-8403. - 16:3(2023), pp. 1-20. [10.1242/dmm.050120]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/373989
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