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Nicotinamide adenine dinucleotide (NAD\n                    <jats:sup>+<\/jats:sup>\n                    ) is a small molecule that participates in hundreds of metabolism-related reactions. NAD\n                    <jats:sup>+<\/jats:sup>\n                    levels are decreased in CKD, and NAD\n                    <jats:sup>+<\/jats:sup>\n                    supplementation is protective. However, both the mechanism of how NAD\n                    <jats:sup>+<\/jats:sup>\n                    supplementation protects from CKD, as well as the cell types involved, are poorly understood. Using a mouse model of Alport syndrome, we show that nicotinamide riboside (NR), an NAD\n                    <jats:sup>+<\/jats:sup>\n                    precursor, stimulated renal PPAR\u03b1 signaling and restored FAO in the proximal tubules, thereby protecting from CKD in both sexes. Bulk RNA-sequencing showed that renal metabolic pathways were impaired in Alport mice and activated by NR in both sexes. These transcriptional changes were confirmed by orthogonal imaging techniques and biochemical assays. Single-nuclei RNA sequencing and spatial transcriptomics, both the first of their kind to our knowledge from Alport mice, showed that NAD\n                    <jats:sup>+<\/jats:sup>\n                    supplementation restored FAO in proximal tubule cells. Finally, we also report, for the first time to our knowledge, sex differences at the transcriptional level in this Alport model. In summary, the data herein identify a nephroprotective mechanism of NAD\n                    <jats:sup>+<\/jats:sup>\n                    supplementation in CKD, and they demonstrate that this benefit localizes to the proximal tubule cells.\n                  <\/jats:p>","DOI":"10.1172\/jci.insight.181443","type":"journal-article","created":{"date-parts":[[2025,3,9]],"date-time":"2025-03-09T14:00:53Z","timestamp":1741528853000},"source":"Crossref","is-referenced-by-count":18,"title":["NAD+ prevents chronic kidney disease by activating renal tubular metabolism"],"prefix":"10.1172","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6950-8414","authenticated-orcid":true,"given":"Bryce A.","family":"Jones","sequence":"first","affiliation":[{"name":"Department of Pharmacology and Physiology, Georgetown University, Washington, DC, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Debora 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