Perpetuation of Inflammation Associated with Experimental Arthritis: the Role of Macrophage Activation by Neutrophilic Myeloperoxidase
Overview
Pathology
Affiliations
Rheumatoid arthritis (RA) is characterized by an abnormal cellular and cytokine infiltration of inflamed joints. This study addresses a previously unrecognized interaction between neutrophilic-myeloperoxidase (MPO) and macrophages (Mphi) which could explain the perpetuation of inflammation associated with RA. A monoarticular arthritis was induced in female Lewis rats by injection of streptococcal cell wall extracts (PG-APS). After swelling and erythema subsided, joints were re-injected with one of the following: porcine MPO or partially inactivated MPO (iMPO). Injection with either MPO or iMPO induced a 'flare' of experimental RA. Blocking the Mphi-mannose receptor by mannans, ablated exacerbation of disease. These results indicate that MPO or iMPO can play a pivotal role in the perpetuation but not initiation of this RA model.
Tarjanyi V, Menes A, Hamid L, Kurucz A, Priksz D, Varga B Int J Mol Sci. 2024; 25(6).
PMID: 38542266 PMC: 10969894. DOI: 10.3390/ijms25063292.
d-mannose suppresses oxidative response and blocks phagocytosis in experimental neuroinflammation.
Wang J, Jalali Motlagh N, Wang C, Wojtkiewicz G, Schmidt S, Chau C Proc Natl Acad Sci U S A. 2021; 118(44).
PMID: 34702739 PMC: 8673064. DOI: 10.1073/pnas.2107663118.
Different behavior of myeloperoxidase in two rodent amoebic liver abscess models.
Cruz-Baquero A, Cardenas Jaramillo L, Gutierrez-Meza M, Jarillo-Luna R, Campos-Rodriguez R, Rivera-Aguilar V PLoS One. 2017; 12(8):e0182480.
PMID: 28796788 PMC: 5552100. DOI: 10.1371/journal.pone.0182480.
A review of the proposed role of neutrophils in rodent amebic liver abscess models.
Campos-Rodriguez R, Gutierrez-Meza M, Jarillo-Luna R, Drago-Serrano M, Abarca-Rojano E, Ventura-Juarez J Parasite. 2016; 23:6.
PMID: 26880421 PMC: 4754534. DOI: 10.1051/parasite/2016006.
Demyelinating diseases: myeloperoxidase as an imaging biomarker and therapeutic target.
Forghani R, Wojtkiewicz G, Zhang Y, Seeburg D, Bautz B, Pulli B Radiology. 2012; 263(2):451-60.
PMID: 22438365 PMC: 3329272. DOI: 10.1148/radiol.12111593.