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Fig. 1 | BMC Immunology

Fig. 1

From: NLRP3 inflammasome up-regulates major histocompatibility complex class I expression and promotes inflammatory infiltration in polymyositis

Fig. 1

The level of inflammation is increased in the PM patients and the NLRP3/caspase-1/ IL-1β axis is active in their muscle samples. A Immunohistochemistry analysis showed higher percentage of CD68+ cells (solid black arrows) in the muscle biopsies in the PM patients than in the controls. B Immunofluorescence staining showed positive MHC-I staining (grade+ ~ ++) in the PM patients, and negative in the controls (grade−). C Immunohistochemistry analysis of the muscle biopsies showed higher expression of NLRP3, caspase-1 and IL-1β (solid black arrows) in the PM patients than in the controls. **p < 0.001; scale bars, 50 μm (original magnification, ×400)

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