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Interleukin-8 and neutrophil extracellular traps in children with lupus nephritis and vitamin C deficiency.
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- Author(s): Santiworakul, Chanunya; Saisorn, Wilasinee; Siripen, Nuanpan; Leelahavanichkul, Asada; Rianthavorn, Pornpimol
- Source:
Pediatric Nephrology; Apr2024, Vol. 39 Issue 4, p1135-1142, 8p- Subject Terms:
CYTOKINES; INTERLEUKINS; LUPUS nephritis; KIDNEYS; BIOPSY; VITAMIN C; VITAMIN C deficiency; NEUTROPHILS; TUMOR necrosis factors; HISTONES; MESSENGER RNA; FLUORESCENT antibody technique; DESCRIPTIVE statistics; RESEARCH funding; EXTRACELLULAR space; DISEASE risk factors; DISEASE complications; ADOLESCENCE - Source:
- Additional Information
- Abstract: Background: Vitamin C is a potent scavenger of reactive oxygen species, which induce neutrophil extracellular trap (NET) formation. NETs are a major source of autoantigens and are involved in systemic lupus erythematosus (SLE) pathogenesis. We determined vitamin C status and evaluated NET formation and inflammatory cytokines in children with lupus nephritis. Methods: Serum vitamin C was measured in 46 patients (82.6% females, mean age 14.5 ± 0.3 years). Vitamin C levels < 0.3 mg/dL indicated vitamin C deficiency. Patients were divided into two groups according to serum vitamin C levels: normal and low (< 0.3 mg/dL). We compared NET formation and levels of SLE-related cytokines, including interleukin (IL)-8, IL-10, and tumor necrosis factor-α (TNF-α), between groups. NET formation was determined through measurement of serum citrullinated histone 3 levels and mRNA expression of peptidyl arginine deiminase-4 and assessment of the percentage of neutrophils with NETs by immunofluorescence. Results: Nine patients (19.6%) had vitamin C deficiency. Kidney pathology assessment at disease onset revealed that histological activity index and number of kidney biopsies containing crescentic glomeruli were higher in vitamin C-deficient patients, but chronicity index was not. NET formation and serum IL-8 were more prominent in vitamin C-deficient patients. Serum IL-8 levels were 12.9 ± 5.2 pg/mL in low vitamin C group and 5.2 ± 0.9 pg/mL in normal vitamin C group (p = 0.03). Serum IL-10 and TNF-α were similar between groups. Conclusions: Our study demonstrated correlation among vitamin C deficiency, increased NET formation, and IL-8 upregulation in children with lupus nephritis. A prospective study is required to evaluate cause‒effect relationships of vitamin C status, NET formation and IL-8 expression. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Pediatric Nephrology is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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