Interleukin-34 drives macrophage polarization to the M2 phenotype in autoimmune hepatitis.

Pathol Res Pract

Nantong Institute of Liver Disease, Nantong Third People's Hospital Affiliated to Nantong University, Department of Gastroenterology and Hepatology, Nantong Third People's Hospital, Nantong University, China. Electronic address:

Published: August 2019

Background: Autoimmune hepatitis is a chronic inflammatory disease, the abnormal immunological function is the main pathogenesis. Interleukin-34 is a newly identified cytokine that shares the same receptor as colony stimulating factor-1.

Methods: We used interleukin-34 knockout and wild-type mice in a Con A-induced hepatitis model and cocultured RAW264.7 macrophage cells with interleukin-34. We then detected associated inflammatory cytokine and chemokine levels to elucidate the role of interleukin-34.

Results: In this study, we found that the loss of interleukin-34 resulted in higher sensitivity to Con A-induced hepatitis. RAW264.7 macrophage cells were able to differentiate to the M2 phenotype upon interleukin-34 stimulation.

Conclusions: We conclude that interleukin-34 may protect the liver from Con A-mediated hepatitis by driving M2 macrophage polarization and suppressing inflammation.

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http://dx.doi.org/10.1016/j.prp.2019.152493DOI Listing

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