Pulsed Electromagnetic Field Inhibits Synovitis via Enhancing the Efferocytosis of Macrophages.

Abstract:

:Synovitis plays an important role in the pathogenesis of arthritis, which is closely related to the joint swell and pain of patients. The purpose of this study was to investigate the anti-inflammatory effects of pulsed electromagnetic fields (PEMF) on synovitis and its underlying mechanisms. Destabilization of the medial meniscus (DMM) model and air pouch inflammation model were established to induce synovitis in C57BL/6 mice. The mice were then treated by PEMF (pulse waveform, 1.5 mT, 75 Hz, 10% duty cycle). The synovitis scores as well as the levels of IL-1β and TNF-α suggested that PEMF reduced the severity of synovitis in vivo. Moreover, the proportion of neutrophils in the synovial-like layer was decreased, while the proportion of macrophages increased after PEMF treatment. In addition, the phagocytosis of apoptotic neutrophils by macrophages (efferocytosis) was enhanced by PEMF. Furthermore, the data from western blot assay showed that the phosphorylation of P38 was inhibited by PEMF. In conclusion, our current data show that PEMF noninvasively exhibits the anti-inflammatory effect on synovitis via upregulation of the efferocytosis in macrophages, which may be involved in the phosphorylation of P38.

journal_name

Biomed Res Int

authors

Ouyang J,Zhang B,Kuang L,Yang P,Du X,Qi H,Su N,Jin M,Yang J,Xie Y,Tan Q,Chen H,Chen S,Jiang W,Liu M,Luo X,He M,Ni Z,Chen L

doi

10.1155/2020/4307385

subject

Has Abstract

pub_date

2020-05-26 00:00:00

pages

4307385

eissn

2314-6133

issn

2314-6141

journal_volume

2020

pub_type

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