{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T12:07:38Z","timestamp":1753877258766,"version":"3.41.2"},"reference-count":0,"publisher":"Oxford University Press (OUP)","issue":"Supplement_1","license":[{"start":{"date-parts":[[2023,6,1]],"date-time":"2023-06-01T00:00:00Z","timestamp":1685577600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,6,14]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background and Aims<\/jats:title>\n                  <jats:p>Beta trace protein (BTP) is a low molecular weight protein that has been proposed as an earlier biomarker of decreased glomerular filtration rate (GFR) and renal damage, than the traditional biomarkers, particularly in the creatinine blind range. Early biomarkers of renal (dys)function are needed to allow, in due time, the detection and treatment, to prevent worsening of the disease. To the authors\u2019 knowledge, neither urine nor serum BTP has been assessed in animals with kidney disease. In the present study, we aimed to concomitantly evaluate BTP and creatinine circulating levels, to compare their value as early biomarkers of renal dysfunction, by performing the studies in rat models of mild and moderate chronic renal failure (CRF) induced by nephrectomy.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Method<\/jats:title>\n                  <jats:p>Male Wistar rats, 12 weeks old, were randomly divided in three groups: Sham (n = 8, subjected to surgical process without kidney mass reduction), Mild CRF (n = 8, subjected to 1\/2 nephrectomy), and Moderate CRF (n = 7, subjected to 5\/6 nephrectomy). After five weeks, rats were sacrificed, blood and kidneys were collected. We analysed the circulating levels of BTP and creatinine and studied the association of BTP concentration with the glomerular and tubulointerstitial lesions, and with the traditional biomarkers of renal (dys)function, eGFR and creatinine.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>The serum levels of BTP were correlated with serum levels of creatinine (r = 0.575, p = 0.004) and also with eGFR (r = -0.453, p = 0.030); additionally, we found positive correlations with the total score of mild and advanced tubular lesions (r = 0.610, p = 0.02 and r = 0.517, p = 0.011, respectively), observed in kidney sections. The circulating levels of BTP increased with disease severity; Mild CRF showed a higher value of BTP than Sham group, although without statistical significance that was reached in Moderate CRF group, as observed for serum creatinine. The combined use of BTP and creatinine did not improve the discriminatory power in early disease detection. Though, the combination showed stronger correlations with the total score of tubular lesions (r = 0.849, p &amp;lt; 0.001 for mild tubular lesions and r = 0.774, p &amp;lt; 0.01 for advanced tubular lesions).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>In rat models of mild and moderate CRF induced by nephrectomy, serum BTP levels increased with kidney function worsening, and correlated with disease severity, assessed by GFR and the degree of histopathological alterations. However, the earlier diagnostic value of BTP does not outperform serum creatinine in this model.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/ndt\/gfad063c_4154","type":"journal-article","created":{"date-parts":[[2023,6,14]],"date-time":"2023-06-14T03:15:26Z","timestamp":1686712526000},"source":"Crossref","is-referenced-by-count":0,"title":["#4154 CIRCULATING BETA-TRACE PROTEIN VERSUS CREATININE AS MARKERS OF EARLY KIDNEY (DYS)FUNCTION IN THE NX-INDUCED RAT MODEL OF CHRONIC KIDNEY DISEASE"],"prefix":"10.1093","volume":"38","author":[{"given":"Irina","family":"Lousa","sequence":"first","affiliation":[{"name":"UCIBIO \u2013 Applied Molecular Biosciences Unit, Faculty of Pharmacy, University of Porto, Laboratory of Biochemistry, Department of Biological Sciences, Porto, Portugal"},{"name":"Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, Porto, Portugal"}]},{"given":"Lu\u00eds","family":"Belo","sequence":"additional","affiliation":[{"name":"UCIBIO \u2013 Applied Molecular Biosciences Unit, Faculty of Pharmacy, University of Porto, Laboratory of Biochemistry, Department of Biological Sciences, Porto, Portugal"},{"name":"Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, Porto, Portugal"}]},{"given":"Sofia D","family":"Viana","sequence":"additional","affiliation":[{"name":"University of Coimbra, Institute of Pharmacology & Experimental Therapeutics, & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal"},{"name":"University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal"},{"name":"Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal"},{"name":"Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, Pharmacy, Coimbra, Portugal"}]},{"given":"Pedro","family":"Vieira","sequence":"additional","affiliation":[{"name":"University of Coimbra, Institute of Pharmacology & Experimental Therapeutics, & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal"},{"name":"University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal"},{"name":"Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal"},{"name":"Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, Pharmacy, Coimbra, Portugal"}]},{"given":"Helena","family":"Vala","sequence":"additional","affiliation":[{"name":"CERNAS, Escola Superior Agr\u00e1ria de Viseu, Instituto Polit\u00e9cnico de Viseu, Campus Polit\u00e9cnico, Viseu, Portugal"},{"name":"Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Tr\u00e1s-os-Montes e Alto Douro, Vila Real, Portugal"}]},{"given":"Alice","family":"Santos-Silva","sequence":"additional","affiliation":[{"name":"UCIBIO \u2013 Applied Molecular Biosciences Unit, Faculty of Pharmacy, University of Porto, Laboratory of Biochemistry, Department of Biological Sciences, Porto, Portugal"},{"name":"Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, Porto, Portugal"}]},{"given":"Fl\u00e1vio","family":"Reis","sequence":"additional","affiliation":[{"name":"University of Coimbra, Institute of Pharmacology & Experimental Therapeutics, & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal"},{"name":"University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Coimbra, Portugal"},{"name":"Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal"}]}],"member":"286","published-online":{"date-parts":[[2023,6,14]]},"container-title":["Nephrology Dialysis Transplantation"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/ndt\/article-pdf\/38\/Supplement_1\/gfad063c_4154\/50675511\/gfad063c_4154.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/ndt\/article-pdf\/38\/Supplement_1\/gfad063c_4154\/50675511\/gfad063c_4154.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,6,22]],"date-time":"2023-06-22T21:56:27Z","timestamp":1687470987000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/ndt\/article\/doi\/10.1093\/ndt\/gfad063c_4154\/7195891"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,6]]},"references-count":0,"journal-issue":{"issue":"Supplement_1","published-online":{"date-parts":[[2023,6,14]]},"published-print":{"date-parts":[[2023,6,14]]}},"URL":"https:\/\/doi.org\/10.1093\/ndt\/gfad063c_4154","relation":{},"ISSN":["0931-0509","1460-2385"],"issn-type":[{"type":"print","value":"0931-0509"},{"type":"electronic","value":"1460-2385"}],"subject":[],"published-other":{"date-parts":[[2023,6]]},"published":{"date-parts":[[2023,6]]},"article-number":"gfad063c_4154"}}