Skip to main content
Log in

Management of Gout-associated MSU crystals-induced NLRP3 inflammasome activation by procyanidin B2: targeting IL-1β and Cathepsin B in macrophages

  • Original Article
  • Published:
Inflammopharmacology Aims and scope Submit manuscript

Abstract

Gout, the most prevalent inflammatory arthritis worldwide, released interleukin-1β (IL-1β) and Cathepsin B inflammatory mediators that constitute the hallmark of the disease. Herein we aimed to investigate whether procyanidin B2 (PCB2), a natural dietary compound, can suppress MSU crystals-stimulated gouty inflammation. Treated with lipopolysaccharide (LPS) plus MSU, both mouse peritoneal macrophages (MPM) and mouse bone marrow-derived macrophages (BMDM) released a large amount of mature IL-1β compared to those treated with MSU or LPS alone, while IL-1β release was blocked by TLR4 and its downstream effector inhibitors. In two mouse models of gout, oral administration of PCB2 suppressed MSU crystals-induced increasing expression of IL-1β, Cathepsin B and NLRP3 in the air pouch skin and paws, accompanied with the downregulation prostaglandin E2 (PGE2) in pouch exudates. Inflammatory immune cell infiltration including macrophages and neutrophils were significantly blocked by PCB2 in air pouch skin and paws of mice gout groups. PCB2 also suppressed the release of IL-1β and Cathepsin B induced by MSU plus LPS in MPM. Our results suggest that the inhibitory effects of PCB2 on NLRP3 inflammasome may alleviate inflammatory response in gout, and this might be a promising anti-inflammatory mechanism of PCB2 against the inflammation in gout.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig.1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7

Similar content being viewed by others

Abbreviations

AMPK:

AMP-activated protein kinase

DMEM:

Dulbecco's modified Eagle medium

IL-1β:

Interleukin-1β

IL-1Ra:

Interleukin-1 receptor antagonist

IL-36Ra:

Interleukin-36 receptor antagonist

MSU crystals:

Monosodium uric acid crystals

NLRP3:

Nod-like receptor (NLR)-family protein 3

PCB2:

Procyanidin B2

LPS:

Lipopolysaccharide

P2X7R:

Purinergic 2X7 receptor

TLR4:

Toll-like receptor 4

NF-κB:

Nuclear factor-kappa B

BMDMs:

Bone marrow-derived macrophages

MPM:

Mouse peritoneal macrophages

PGE2:

Prostaglandin E2

References

Download references

Acknowledgements

This study was supported by a grant from the National Natural Science Foundation of China (81960677 and 81660689), and partially by Science and Technology Planning Projects from the Science and Technology Department of Jilin Province (20180414048GH, 20180201065YY and 20180519010JH) and Science and Technology Planning Project of the Jilin Provincial Education Department (JJKH20191155KJ).

Author information

Authors and Affiliations

Authors

Corresponding authors

Correspondence to Ji-Xing Nan or Li-Hua Lian.

Ethics declarations

Conflict of interest

The authors have declared no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Qiao, CY., Li, Y., Shang, Y. et al. Management of Gout-associated MSU crystals-induced NLRP3 inflammasome activation by procyanidin B2: targeting IL-1β and Cathepsin B in macrophages. Inflammopharmacol 28, 1481–1493 (2020). https://doi.org/10.1007/s10787-020-00758-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10787-020-00758-8

Keywords

Navigation