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Cytokine status and significant increase of IL-6 and sIL-6R in the aqueous humor of diabetic cataract patients revealed by quantitative multiplexed assays.
Journal of International Medical Research 2023 September
OBJECTIVE: This study aimed to investigate inflammatory cytokine expression profiles in the aqueous humor (AH) of diabetic cataract (DC) patients.
METHODS: A quantitative multiplexed antibody assay was performed to measure the expression levels of 40 inflammatory cytokines in AH samples from DC and age-related cataract (ARC) patients. Bioinformatics analysis was used to examine the functions of the cytokines. Enzyme-linked immunosorbent assays (ELISAs) and western blots were performed to verify the data.
RESULTS: The multiplexed antibody assay revealed that the expression levels of IL-6, sIL-6R, IL-17A, IL-8, MCP-1, TNF-β, RANTES, TIMP-1, and TIMP-2 were higher in the AH of DC patients compared with ARC patients. However, IL-1ra and IL-1a expression levels were lower in the DC patient AH samples. Pathway analysis indicated that IL-6 and sIL-6R belong to the class I helical cytokine family, which is associated with many biological functions. ELISA and western blot results confirmed that IL-6R and IL-6 expression levels were significantly higher in DC patients compared with ARC patients.
CONCLUSIONS: Our results revealed the status of 40 inflammatory cytokines in the AH by quantitative multiplexed assays. Additionally, IL-6 and sIL-6R were expressed markedly higher in DC compared with ARC, which may play critical roles in DC pathophysiology.
METHODS: A quantitative multiplexed antibody assay was performed to measure the expression levels of 40 inflammatory cytokines in AH samples from DC and age-related cataract (ARC) patients. Bioinformatics analysis was used to examine the functions of the cytokines. Enzyme-linked immunosorbent assays (ELISAs) and western blots were performed to verify the data.
RESULTS: The multiplexed antibody assay revealed that the expression levels of IL-6, sIL-6R, IL-17A, IL-8, MCP-1, TNF-β, RANTES, TIMP-1, and TIMP-2 were higher in the AH of DC patients compared with ARC patients. However, IL-1ra and IL-1a expression levels were lower in the DC patient AH samples. Pathway analysis indicated that IL-6 and sIL-6R belong to the class I helical cytokine family, which is associated with many biological functions. ELISA and western blot results confirmed that IL-6R and IL-6 expression levels were significantly higher in DC patients compared with ARC patients.
CONCLUSIONS: Our results revealed the status of 40 inflammatory cytokines in the AH by quantitative multiplexed assays. Additionally, IL-6 and sIL-6R were expressed markedly higher in DC compared with ARC, which may play critical roles in DC pathophysiology.
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