دورية أكاديمية
Macrophage MerTK promotes profibrogenic cross-talk with hepatic stellate cells via soluble mediators
| العنوان: | Macrophage MerTK promotes profibrogenic cross-talk with hepatic stellate cells via soluble mediators |
|---|---|
| المؤلفون: | Pastore, M, Caligiuri, A, Raggi, C, Navari, N, Piombanti, B, Di Maira, G, Rovida, E, Piccinni, MP, Lombardelli, L, Logiodice, F, Rombouts, K, Petta, S, Marra, F |
| المصدر: | JHEP Reports , 4 (4) , Article 100444. (2022) |
| بيانات النشر: | Elsevier BV |
| سنة النشر: | 2022 |
| المجموعة: | University College London: UCL Discovery |
| مصطلحات موضوعية: | Gas-6, THP-1, M2c-like macrophages, NASH, liver fibrosis |
| الوصف: | Background & Aims: Activation of Kupffer cells and recruitment of monocytes are key events in fibrogenesis. These cells release soluble mediators which induce the activation of hepatic stellate cells (HSCs), the main fibrogenic cell type within the liver. Mer tyrosine kinase (MerTK) signaling regulates multiple processes in macrophages and has been implicated in the pathogenesis of non-alcoholic steatohepatitis-related fibrosis. In this study, we explored if MerTK activation in macrophages influences the profibrogenic phenotype of HSCs. Methods: Macrophages were derived from THP-1 cells or differentiated from peripheral blood monocytes towards MerTK+/CD206+/CD163+/CD209- macrophages. The role of MerTK was assessed by pharmacologic and genetic inhibition. HSC migration was determined in Boyden chambers, viability was measured by the MTT assay, and proliferation was evaluated by the BrdU incorporation assay. Results: Gas-6 induced MerTK phosphorylation and Akt activation in macrophages, and these effects were inhibited by UNC569. During polarization, MerTK+/CD206+/CD163+/CD209- macrophages exhibited activation of STAT3, ERK1/2, p38 and increased expression of VEGF-A. Activation of MerTK in THP-1 macrophages induced a secretome which promoted a significant increase in migration, proliferation, viability and expression of profibrogenic factors in HSCs. Similarly, conditioned medium from MerTK+ macrophages induced a significant increase in cell migration, proliferation, STAT3 and p38 phosphorylation and upregulation of IL-8 expression in HSCs. Moreover, conditioned medium from Gas-6-stimulated Kupffer cells induced a significant increase in HSC proliferation. These effects were specifically related to MerTK expression and activity in macrophages, as indicated by pharmacologic inhibition and knockdown experiments. Conclusions: MerTK activation in macrophages modifies the secretome to promote profibrogenic features in HSCs, implicating this receptor in the pathogenesis of hepatic fibrosis. Lay summary: Fibrosis ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://discovery.ucl.ac.uk/id/eprint/10145197/1/Rombouts_1-s2.0-S2589555922000167-main.pdfTest; https://discovery.ucl.ac.uk/id/eprint/10145197Test/ |
| الإتاحة: | https://discovery.ucl.ac.uk/id/eprint/10145197/1/Rombouts_1-s2.0-S2589555922000167-main.pdfTest https://discovery.ucl.ac.uk/id/eprint/10145197Test/ |
| حقوق: | open |
| رقم الانضمام: | edsbas.19BB7621 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |