PMID- 20231821 OWN - NLM STAT- MEDLINE DCOM- 20100707 LR - 20230216 IS - 1530-0307 (Electronic) IS - 0023-6837 (Print) IS - 0023-6837 (Linking) VI - 90 IP - 6 DP - 2010 Jun TI - High-mobility group box-1 protein promotes granulomatous nephritis in adenine-induced nephropathy. PG - 853-66 LID - 10.1038/labinvest.2010.64 [doi] AB - Granulomatous nephritis can be triggered by diverse factors and results in kidney failure. However, despite accumulating data about granulomatous inflammation, pathogenetic mechanisms in nephritis remain unclear. The DNA-binding high-mobility group box-1 protein (HMGB1) initiates and propagates inflammation when released by activated macrophages, and functions as an 'alarm cytokine' signaling tissue damage. In this study, we showed elevated HMGB1 expression in renal granulomas in rats with crystal-induced granulomatous nephritis caused by feeding an adenine-rich diet. HMGB1 levels were also raised in urine and serum, as well as in monocyte chemoattractant protein-1 (MCP-1), a mediator of granulomatous inflammation. Injection of HMGB1 worsened renal function and upregulated MCP-1 in rats with crystal-induced granulomatous nephritis. HMGB1 also induced MCP-1 secretion through mitogen-activated protein kinase (MAPK) and phosphoinositide-3-kinase (PI3K) pathways in rat renal tubular epithelial cells in vitro. Hmgb1(+/-) mice with crystal-induced nephritis displayed reduced MCP-1 expression in the kidneys and in urine and the number of macrophages in the kidneys was significantly decreased. We conclude that HMGB1 is a new mediator involved in crystal-induced nephritis that amplifies granulomatous inflammation in a cycle where MCP-1 attracts activated macrophages, resulting in excessive and sustained HMGB1 release. HMGB1 could be a novel target for inhibiting chronic granulomatous diseases. FAU - Oyama, Yoko AU - Oyama Y AD - Department of Laboratory and Vascular Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan. FAU - Hashiguchi, Teruto AU - Hashiguchi T FAU - Taniguchi, Noboru AU - Taniguchi N FAU - Tancharoen, Salunya AU - Tancharoen S FAU - Uchimura, Tomonori AU - Uchimura T FAU - Biswas, Kamal K AU - Biswas KK FAU - Kawahara, Ko-Ichi AU - Kawahara K FAU - Nitanda, Takao AU - Nitanda T FAU - Umekita, Yoshihisa AU - Umekita Y FAU - Lotz, Martin AU - Lotz M FAU - Maruyama, Ikuro AU - Maruyama I LA - eng GR - R01 AR056026/AR/NIAMS NIH HHS/United States GR - R01 AR056026-02/AR/NIAMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100315 PL - United States TA - Lab Invest JT - Laboratory investigation; a journal of technical methods and pathology JID - 0376617 RN - 0 (Ccl2 protein, rat) RN - 0 (Chemokine CCL2) RN - 0 (HMGB1 Protein) RN - AYI8EX34EU (Creatinine) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - JAC85A2161 (Adenine) SB - IM MH - Adenine/*pharmacology MH - Animals MH - Blood Urea Nitrogen MH - Chemokine CCL2/drug effects/genetics MH - Creatinine/blood MH - Epithelial Cells/cytology/physiology MH - Granuloma/*chemically induced/genetics/pathology/prevention & control MH - HMGB1 Protein/deficiency/*genetics/metabolism/pharmacology MH - Inflammation/chemically induced/genetics/pathology/prevention & control MH - Kidney Diseases/*chemically induced/pathology MH - Kidney Tubules/cytology/physiology MH - Mice MH - Nephritis/*chemically induced/pathology MH - Phosphatidylinositol 3-Kinases/metabolism MH - Rats PMC - PMC3096665 MID - NIHMS290203 EDAT- 2010/03/17 06:00 MHDA- 2010/07/08 06:00 PMCR- 2011/05/17 CRDT- 2010/03/17 06:00 PHST- 2010/03/17 06:00 [entrez] PHST- 2010/03/17 06:00 [pubmed] PHST- 2010/07/08 06:00 [medline] PHST- 2011/05/17 00:00 [pmc-release] AID - S0023-6837(22)02478-3 [pii] AID - 10.1038/labinvest.2010.64 [doi] PST - ppublish SO - Lab Invest. 2010 Jun;90(6):853-66. doi: 10.1038/labinvest.2010.64. Epub 2010 Mar 15.