PROBLEM TO BE SOLVED: To provide an agent for preventing or treating glomerulonephritis highly expressing cytokine.SOLUTION: An agent for preventing or treating glomerulonephritis comprises FSP1 (fibroblast-specific protein 1) or a transcription factor NFAT5 (nuclear factor of activated T-cells 5).【課題】サイトカインを高発現する腎炎の予防・治療剤の提供。【解決手段】FSP1または転写因子NFAT5を用いる腎炎の予防または治療剤など。【選択図】なし