Overview of studies demonstrating EV-mediated cell-to-cell communication in the liver in MAFLD
Cell source | Cargo | Target cell | Associated molecules and/or signaling pathways | Role in MAFLD | References |
---|---|---|---|---|---|
Hepatocytes | Not evaluated | KCs | Not evaluated | Pro-inflammatory | [37] |
TRAIL | Bone marrow-derived macrophages (BMDM) and THP-1 macrophages | CHOP-DR5-Caspase-3/Caspase-8-ROCK1NF-κBRIP1 | Promotes M1 polarization of BMDM and THP-1 macrophages | [14] | |
ITGβ1 | THP-1 macrophages | Not evaluated | Promotes THP-1 inflammatory phenotype and increasesTHP-1-LSEC adhesion | [38] | |
Ceramides | Macrophages | IRE1α-XBP1-Sptlc1 and Sptlc2 | Promotes activation and recruitment of macrophages | [11, 39] | |
S1P | Macrophages | SphK1 and SphK2 S1P1 receptor | Promotes activation and recruitment of macrophages | [40] | |
mtDNA | KCs and RAW 264.7 cells | TLR-9 | Promotes activation of KCs and RAW 264.7 cells | [41, 42] | |
HSCs | Proteins | Not evaluated | ECM components, proteasome, collagens, vesicular transport, metabolic enzymes, ribosomes, and chaperones | Regulation of HSC activation and fibrogenic pathways in vivo | [43] |
Fibrogenic proteins | HSCs, macrophages, and endothelial cells (ECs) | PDGF; SHP2; mTOR signaling; ROCK signaling | Autophagy plays a critical role in the release of pro-fibrogenic EVs and HSC function | [44] | |
LSECs | IGFBP7; ADAMTS1 | Fibrotic Th17 cells | Histone deacetylase 2 (HDAC2)DNA methyltransferase 1 (DNMT1) | Epigenetic dysregulation of LSEC exacerbates liver disease | [45] |
Tropomyosin-1 (TPM1) | Rat hepatocytes, HSCs, human macrophages | ESCRT-dependent pathway (Mvb12-a, Mvb12-b), lipid-rafts structures such as Flot2, tetraspanins CD9 and CD81, and the Rab3 small GTPase | Deactivation of HSCs | [46] |
TRAIL: tumor necrosis factor-related apoptosis-inducing ligand; ITGβ1: integrin β1; IGFBP7: insulin-like growth factor-binding protein-7; Th17: T helper type 17; ROCK1: Rho-associated, coiled-coil-containing protein kinase 1; NF-κB: nuclear factor-κB; RIP1: receptor-interacting protein kinase 1; IRE1α: inositol-requiring transmembrane kinase/endoribonuclease 1α; SphK1: sphingosine kinase 1; TLR-9: Toll-like receptor-9; PDGF: platelet-derived growth factor; SHP2: srchomology-2-domain-containing PTP 2; mTOR: mechanistic target of rapamycin; CHOP: C/EBP homologous protein; DR5: death receptor 5; ADAMTS1: ADAM metallopeptidase with thrombospondin type 1 motif 1; XBP1: X-box binding protein 1; Sptlc1: serine palmitoyltransferase long chain base subunit 1; S1P: sphingosine 1-phosphate; Flot2: flotillin 2; Mvb12-a/b: multivesicular body subunit 12A/B
ZW contributed to the abstract, sections 1, 2, 5.2, conclusions and Figure 1. MX contributed to the
The authors declare that they have no known competing financial interests of personal relationships that could have appeared to influence the work reported in this research paper.
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This project is financially supported by the China Scholarship Council (CSC) grant 202008320321 (MX), grant 202006250036 (JW) and grant 201806170085 (ZW), Conacyt grant 795389 (MMA), Colciencias International Scholarship Program grant 783-2017 (JAO), the Abel Tasman Talent Program of the University Medical Center Groningen (MCTA), Dutch Digestive Foundation grant WO 21-03 (SSS; HB; HM). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
© The Author(s) 2022.