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  • Title: Chemokine (C-C motif) receptor 2 is associated with the pathological grade and inflammatory response in IgAN children.
    Author: Shen Y, Zhu Z, Wang R, Yan L, Sun S, Lu L, Ren Z, Zhang Q.
    Journal: BMC Nephrol; 2022 Jun 20; 23(1):215. PubMed ID: 35725391.
    Abstract:
    BACKGROUND: Chemokine (C-C motif) receptor 2 (CCR2) is involved in important physiological and pathological processes, such as inflammation and autoimmune diseases. Abnormal immune and inflammatory responses play a critical role in the development and progression of IgA nephritis (IgAN). However, the role of CCR2 in IgAN is unknown. METHODS: Fifteen IgAN children who were diagnosed by kidney biopsy provided kidney biopsy tissue, blood and urine samples, and age-matched healthy control subjects (blood donators n = 12; tissue donators n = 8) were included. Immunohistochemical analysis was used to detect the expression of CCR2, MCP-1, IL-6, IL-17, and TNF-α in the kidney tissues. Relative optical density (OD) was calculated by Image J software, and the correlation between CCR2 expression and pathological grade in IgAN children was analyzed. RESULTS: The expression of CCR2 significantly increased in mesangial cells of children with IgAN compared to that in control group (P < 0.001), especially in IgAN patients with Lee's grade III to IV (P < 0.001). Interestingly, CCR2 expression was positively correlated with Lee's grade (r = 0.9152, P = 0.0001) in IgAN children. The expression levels of inflammatory factors were markedly increased in IgAN children, and importantly CCR2 expression was positively correlated with it's expression level. CONCLUSIONS: The results suggest that CCR2 signaling might be involved in pathological process and inflammatory responses of children IgAN, and could potentially be an intervention target in children IgAN.
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