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Emerging Roles of Perivascular Mesenchymal Stem Cells in Synovial Joint Inflammation

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Abstract

In contrast to the significant advances in our understanding of the mesenchymal stem cell (MSC) populations in bone marrow (BM), little is known about the MSCs that are resident in the synovial joint and their possible roles in the tissue homeostasis, chronic inflammation as well as in repair. Neural crest is a transient embryonic structure, generating multipotential MSC capable of migrating along peripheral nerves and blood vessels to colonize most tissue types. In adult, these MSC can provide functional stromal support as a stem cell niche for lymphocyte progenitors for instance in the BM and the thymus. Critically, MSC have major immunoregulatory activities to control adverse inflammation and infection. These MSC will remain associated to vessels (perivascular (p) MSC) and their unique expression of markers such as myelin P0 and transcription factors (e.g. Gli1 and FoxD1) has been instrumental to develop transgenic mice to trace the fate of these cells in health and disease conditions. Intriguingly, recent investigations of chronic inflammatory diseases argue for an emerging role of pMSC in several pathological processes. In response to tissue injuries and with the release of host cell debris (e.g. alarmins), pMSC can detach from vessels and proliferate to give rise to either lipofibroblasts, osteoblasts involved in the ossification of arteries and myofibroblasts contributing to fibrosis. This review will discuss currently available data that suggest a role of pMSC in tissue homeostasis and pathogenesis of the synovial tissue and joints.

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Abbreviations

alpha SMA:

Alpha smooth muscle actin cell marker

ANG-1:

Angiopoitein-1

BM:

Bone marrow

BMPs:

Bone morphogenic proteins

CAIA:

Collagen antibody-induced arthritis

CDH-11:

Cadherin-11

CIA:

Collagen-induced arthritis

CKD:

Chronic kidney disease

CSCs:

Cancer stem cells

CSPG4:

Chondroitin sulfate proteoglycan 4

CXCL12:

CXC chemokine ligand 12

CXCL4:

CXC chemokine ligand 4

DAMPS:

Danger-associated molecular patterns

DCs:

Dendritic cells

ECM:

Extracellular matrix

EMT:

Epithelial mesenchymal transition

FAP:

Fibroblast activation protein

FGF:

Fibroblast growth factors

FGFR:

Fibroblast growth factor receptor

FLS:

Fibroblast-like synoviocytes

FPR2:

N-formyl peptide receptor

FZD:

Frizzled receptor

GDF-5:

Growth and differentiation factor-5

GFAP:

Glial fibrillary acidic protein

Gli1:

Glioma-associated oncogene homolog 1

gMSC:

Glial mesenchymal stem cell

HMGB1:

High mobility group B 1

HpSC:

Hepatic stellate cells

HSC:

Hematopoietic stem cells

HSP:

Heat shock protein

IPF:

Idiopathic pulmonary fibrosis

LEPR:

Leptin Receptor

MIF:

Macrophage migration inhibitory factor

MSC:

Mesenchymal stem cell

Myh11:

Myosin heavy chain 11

NC:

Neural crest

NC-MSC:

Neural crest derived mesenchymal stem cell

NG2:

Neuron glial antigen 2

NK:

Natural killer

OA:

Osteoarthritis

P0:

Myelin P zero protein

PAMPS:

Pathogen-associated molecular patterns

PDGFR:

Platelet-derived growth factor receptor

PRR:

Pathogen recognition receptors

Ptc:

Patched

RA:

Rheumatoid arthritis

SCF:

Stem cell factor

SDF1-α:

Stromal differentiation factor 1 alpha

Shh:

Sonic hedgehog

Smo:

Smoothened

TEM1:

Tumor endothelial marker

TGF-β:

transforming growth factor b

TLRs:

Toll-like receptors

VCAM:

Vascular endothelial cell adhesion molecule

VEGF:

Vascular endothelial growth factor

Wnt:

Wingless-type MMTV integration site

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Acknowledgements

The authors thank Dr. A Williams from the rheumatology department at Cardiff University.

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Correspondence to Philippe Gasque.

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Authors (P Guiraud) (P Gasque), has received funding from Conseil Régional de la Réunion (GURDTI-2017-1198-0002583, Viropam) (Convention 20192211–0022768, EPIGEN).

Conflict of Interest

All authors declare that he/she has no conflict of interest.

Ethical Approval

The work included here did not involve animals. The biopsy sample of human synovial tissue used to generate the illustration in Fig. 3 was consented for and used in accordance with the ethical standards of the institutional (Cardiff Medical school, UK) and with the 1964 Helsinki declaration and its later amendments. Thus, synovial tissues were kindly obtained from Dr. Anwen S. Williams (Rheumatology department, Cardiff University and collected from diseased joints of OA and RA patients during routine surgical intervention. Ethical approval was granted by the Bro Taf Health Authority (LREC 02/4692).

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Bedoui, Y., Lebeau, G., Guillot, X. et al. Emerging Roles of Perivascular Mesenchymal Stem Cells in Synovial Joint Inflammation. J Neuroimmune Pharmacol 15, 838–851 (2020). https://doi.org/10.1007/s11481-020-09958-z

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