Biglycan- and Sphingosine Kinase-1 Signaling Crosstalk Regulates the Synthesis of Macrophage Chemoattractants.

Hsieh, Louise Tzung-Harn; Nastase, Madalina-Viviana; Roedig, Heiko; Zeng-Brouwers, Jinyang; Poluzzi, Chiara; Schwalm, Stephanie; Fork, Christian; Tredup, Claudia; Brandes, Ralf P; Wygrecka, Malgorzata; Huwiler, Andrea; Pfeilschifter, Josef; Schaefer, Liliana (2017). Biglycan- and Sphingosine Kinase-1 Signaling Crosstalk Regulates the Synthesis of Macrophage Chemoattractants. International journal of molecular sciences, 18(3) Molecular Diversity Preservation International MDPI 10.3390/ijms18030595

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In its soluble form, the extracellular matrix proteoglycan biglycan triggers the synthesis of the macrophage chemoattractants, chemokine (C-C motif) ligand CCL2 and CCL5 through selective utilization of Toll-like receptors (TLRs) and their adaptor molecules. However, the respective downstream signaling events resulting in biglycan-induced CCL2 and CCL5 production have not yet been defined. Here, we show that biglycan stimulates the production and activation of sphingosine kinase 1 (SphK1) in a TLR4- and Toll/interleukin (IL)-1R domain-containing adaptor inducing interferon (IFN)-β (TRIF)-dependent manner in murine primary macrophages. We provide genetic and pharmacological proof that SphK1 is a crucial downstream mediator of biglycan-triggered CCL2 and CCL5 mRNA and protein expression. This is selectively driven by biglycan/SphK1-dependent phosphorylation of the nuclear factor NF-κB p65 subunit, extracellular signal-regulated kinase (Erk)1/2 and p38 mitogen-activated protein kinases. Importantly, in vivo overexpression of soluble biglycan causes Sphk1-dependent enhancement of renal CCL2 and CCL5 and macrophage recruitment into the kidney. Our findings describe the crosstalk between biglycan- and SphK1-driven extracellular matrix- and lipid-signaling. Thus, SphK1 may represent a new target for therapeutic intervention in biglycan-evoked inflammatory conditions.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Pharmacology

UniBE Contributor:

Huwiler, Andrea

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1661-6596

Publisher:

Molecular Diversity Preservation International MDPI

Language:

English

Submitter:

Jana Berger

Date Deposited:

08 Aug 2017 15:28

Last Modified:

11 Sep 2017 17:46

Publisher DOI:

10.3390/ijms18030595

PubMed ID:

28282921

Uncontrolled Keywords:

chemoattractant; damage-associated molecular pattern; extracellular matrix; lipid signaling; macrophage; small leucine-rich proteoglycan; sphingolipid; toll-like receptors

BORIS DOI:

10.7892/boris.98114

URI:

https://boris.unibe.ch/id/eprint/98114

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