A human prostaglandin E2 (PGE2)-specific ELISA kit was used in accordance with the manufacturer’s protocol (catalog no. 514010; Cayman Chemical). After the applied treatments, the culture media were collected, and PGE2 levels in the culture media were measured by ELISA. PGE2 levels were normalized to the protein concentrations in the cell lysates. Normalized PGE2 values from the treatment groups are represented as relative values based on comparison to the control group.
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