{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T10:42:40Z","timestamp":1773484960034,"version":"3.50.1"},"reference-count":51,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T00:00:00Z","timestamp":1750204800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Njurfonden and Westmans Stiftelse","award":["2022-01477"],"award-info":[{"award-number":["2022-01477"]}]},{"name":"Njurfonden and Westmans Stiftelse","award":["2021-01102"],"award-info":[{"award-number":["2021-01102"]}]},{"name":"Njurfonden and Westmans Stiftelse","award":["20230231"],"award-info":[{"award-number":["20230231"]}]},{"name":"Vetenskapsr\u00e5det","award":["2022-01477"],"award-info":[{"award-number":["2022-01477"]}]},{"name":"Vetenskapsr\u00e5det","award":["2021-01102"],"award-info":[{"award-number":["2021-01102"]}]},{"name":"Vetenskapsr\u00e5det","award":["20230231"],"award-info":[{"award-number":["20230231"]}]},{"name":"Heart-and-Lung foundation","award":["2022-01477"],"award-info":[{"award-number":["2022-01477"]}]},{"name":"Heart-and-Lung foundation","award":["2021-01102"],"award-info":[{"award-number":["2021-01102"]}]},{"name":"Heart-and-Lung foundation","award":["20230231"],"award-info":[{"award-number":["20230231"]}]},{"name":"CIMED","award":["2022-01477"],"award-info":[{"award-number":["2022-01477"]}]},{"name":"CIMED","award":["2021-01102"],"award-info":[{"award-number":["2021-01102"]}]},{"name":"CIMED","award":["20230231"],"award-info":[{"award-number":["20230231"]}]},{"name":"StratNeuro","award":["2022-01477"],"award-info":[{"award-number":["2022-01477"]}]},{"name":"StratNeuro","award":["2021-01102"],"award-info":[{"award-number":["2021-01102"]}]},{"name":"StratNeuro","award":["20230231"],"award-info":[{"award-number":["20230231"]}]},{"name":"\u00c5hl\u00e9n-stiftelsen","award":["2022-01477"],"award-info":[{"award-number":["2022-01477"]}]},{"name":"\u00c5hl\u00e9n-stiftelsen","award":["2021-01102"],"award-info":[{"award-number":["2021-01102"]}]},{"name":"\u00c5hl\u00e9n-stiftelsen","award":["20230231"],"award-info":[{"award-number":["20230231"]}]},{"name":"Hedlunds stiftelse","award":["2022-01477"],"award-info":[{"award-number":["2022-01477"]}]},{"name":"Hedlunds stiftelse","award":["2021-01102"],"award-info":[{"award-number":["2021-01102"]}]},{"name":"Hedlunds stiftelse","award":["20230231"],"award-info":[{"award-number":["20230231"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cells"],"abstract":"<jats:p>Patients with chronic kidney disease (CKD) face an increased risk of early vascular aging, progressive vascular calcification, and premature death. With increasing age, mitochondrial function and mitochondrial DNA copy number (mtDNA-cn) decline. This has been identified as an independent predictor of frailty and mortality in cardiovascular diseases (CVDs) and cancer. However, the relationship between mtDNA-cn and vascular calcification in the context of a uremic milieu remains ambiguous. We hypothesize that a lower mtDNA-cn is associated with medial calcification, as both are linked to impaired vascular health and accelerated aging. mtDNA-cn was analyzed in 211 CKD5 patients undergoing renal transplantation (RTx) and 196 healthy controls using quantitative PCR (qPCR) for three mtDNA genes (mtND1, mtND4, and mtCOX1) and single-locus nuclear gene hemoglobin beta (HbB). In 32 patients, mtDNA-cn was also quantified one year after RTx. The association between mtDNA-cn and vascular calcification scores, circulatory cell-free (ccf) mtDNA in plasma, and the surrogate marker of biological aging (skin autofluorescence) and CVD risk was assessed. mtDNA-cn was significantly lower in CKD5 patients than in controls and correlated with biological age, vascular calcification, and CVD risk. One year after RTx there was a significant recovery of mtDNA-cn in male patients compared to baseline levels. mtDNA-cn and ccf-mtDNA were inversely correlated. This prospective study provides novel insights into the link between low mtDNA-cn and vascular aging. It demonstrates that RTx restores mtDNA levels and may improve oxidative phosphorylation capacity in CKD. Further investigation is warranted to evaluate mtDNA as a biologically relevant biomarker and a potential therapeutic target for early vascular aging in the uremic environment.<\/jats:p>","DOI":"10.3390\/cells14120917","type":"journal-article","created":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T07:38:15Z","timestamp":1750232295000},"page":"917","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Reduced mtDNA Copy Number Links to Vascular Calcification and Restores After Transplantation"],"prefix":"10.3390","volume":"14","author":[{"given":"Angelina","family":"Schwarz","sequence":"first","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0536-5327","authenticated-orcid":false,"given":"Abdul Rashid","family":"Qureshi","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7443-1626","authenticated-orcid":false,"given":"Leah","family":"Hernandez","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lars","family":"Wennberg","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Transplantation Surgery, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Annika","family":"Wernerson","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4841-6836","authenticated-orcid":false,"given":"Karolina","family":"Kublickiene","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paul G.","family":"Shiels","sequence":"additional","affiliation":[{"name":"Glasgow Geroscience Group, School of Molecular Biosciences, University of Glasgow, Glasgow G12 8QQ, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6581-9426","authenticated-orcid":false,"given":"Roberta","family":"Filograna","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Medical Biochemistry and Biophysics, SE-171 65 Solna, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8785-4820","authenticated-orcid":false,"given":"Peter","family":"Stenvinkel","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0827-3586","authenticated-orcid":false,"given":"Anna","family":"Witasp","sequence":"additional","affiliation":[{"name":"Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, SE-141 52 Huddinge, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,6,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1803","DOI":"10.1093\/ndt\/gfz174","article-title":"A single number for advocacy and communication-worldwide more than 850 million individuals have kidney diseases","volume":"34","author":"Jager","year":"2019","journal-title":"Nephrol. 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