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As a pivotal deacetylase, Sirtuin1 (Sirt1) exhibits notably anti\u2010inflammatory effects, but its metabolic mechanism in regulating CaOx nephropathy remains unexplored.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We analysed organic acid metabolism in kidney using the nontargeted metabolome and identified key targets by RNA\u2010seq. Evaluate renal injury and oxidative stress using techniques such as Positron Emission Tomography\u2010Computed Tomography (PET\/CT) and transmission electron\u00a0microscope. The protective mechanisms of Sirt1 against CaOx\u2010induced kidney injury and subsequent crystal deposition were demonstrated using in vitro coculture systems and in vivo Sirt1 conditional knockout mice.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>We found that Sirt1 has a significant protective effect on renal injury and oxidative stress induced by CaOx. Sirt1 expression decreases in CaOx nephropathy mice, and activation of Sirt1 reduces CaOx\u2010induced kidney injury and crystal deposition by increasing the level of itaconate. In addition, it was found that Sirt1 enhances immunoresponsive gene 1 and inhibits Sdha by trimethylating histones, thereby regulating the oxidation levels of itaconate and succinate. Furthermore, we emphasise the valuable role of Sirt1 agonists and exogenous itaconate in alleviating crystal induced kidney injury.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our study revealed a previously unknown function of Sirt1 in CaOx nephropathy. By regulating itaconate level through epigenetic, Sirt1 protects against renal inflammation and oxidative damage induced by CaOx. Our preclinical data suggest that targeted Sirt1 agonism represents a promising therapeutic intervention for progressive crystallopathic nephropathy, potentially disrupting the inflammation\u2013crystallisation vicious cycle.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Highlights<\/jats:title>\n                    <jats:p>\n                      <jats:list list-type=\"bullet\">\n                        <jats:list-item>\n                          <jats:p>Sirt1 is significantly reduced in CaOx\u2010induced nephropathy models in vivo and calcium oxalate monohydrate (COM) induced in vitro.<\/jats:p>\n                        <\/jats:list-item>\n                        <jats:list-item>\n                          <jats:p>Sirt1 in macrophages alleviated CaOx\u2010induced kidney injury and crystal deposition via elevating itaconate levels. Conditional knockout of Sirt1 in vivo significantly exacerbates renal crystal deposition and function damage.<\/jats:p>\n                        <\/jats:list-item>\n                        <jats:list-item>\n                          <jats:p>\n                            We accurately evaluated CaOx\u2010induced renal inflammation status by micro\n                            <jats:sup>18<\/jats:sup>\n                            F\u2010FDG PET\/CT, and observed macrophage phagocytosis and encapsulation of crystals exposed to epithelial cells through scanning electron microscopy.\n                          <\/jats:p>\n                        <\/jats:list-item>\n                        <jats:list-item>\n                          <jats:p>Sirt1 agonists can be used as preventative and therapeutic agents for CaOx nephropathy, and exogenous supplementation of itaconate effectively alleviated renal crystallisation and inflammatory damage.<\/jats:p>\n                        <\/jats:list-item>\n                      <\/jats:list>\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ctm2.70450","type":"journal-article","created":{"date-parts":[[2025,8,18]],"date-time":"2025-08-18T16:19:55Z","timestamp":1755533995000},"source":"Crossref","is-referenced-by-count":5,"title":["Sirtuin1 mitigation of calcium oxalate nephropathy via enhancing itaconate abundance through reduction of histone trimethylation"],"prefix":"10.1002","volume":"15","author":[{"given":"Xiangyang","family":"Yao","sequence":"first","affiliation":[{"name":"Department of Urology Zhongnan Hospital of Wuhan University  Wuhan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haoran","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Urology The First Affiliated Hospital of Anhui Medical University  Hefei 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