Vitamin D deficiency is not associated with increased oxidative stress in chronic kidney disease pre-dialysis patients.

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  • Additional Information
    • Source:
      Publisher: Sociedade Brasileira de Nefrologia Country of Publication: Brazil NLM ID: 9426946 Publication Model: Print Cited Medium: Internet ISSN: 2175-8239 (Electronic) Linking ISSN: 01012800 NLM ISO Abbreviation: J Bras Nefrol Subsets: MEDLINE
    • Publication Information:
      Publication: São Paulo : Sociedade Brasileira de Nefrologia
      Original Publication: São Paulo, Brazil : Associação Medica Brasileira
    • Subject Terms:
      Renal Insufficiency, Chronic*/complications ; Vitamin D Deficiency*/complications; Cross-Sectional Studies ; Dialysis ; Female ; Humans ; Male ; Oxidative Stress ; Vitamin D
    • Abstract:
      Introduction: The progressive decline in 25-hydroxyvitamin D [25(OH)D] in chronic kidney disease (CKD) limits the kidney ability of synthesizing the vitamin. Vitamin D deficiency as defined by KDIGO (25(OH)D <20 ng/mL) is prevalent in CKD patients and associated to oxidative stress (OS). We studied a possible association between vitamin D deficiency and OS in pre-dialysis patients.
      Methods: A cross-sectional study with 206 CKD patients was carried out. Laboratory tests for 25(OH)D, 1,25(OH)2D, inflammatory markers, and OS were added to routine tests including creatinine, albumin, calcium, phosphorus, alkaline phosphatase, iPTH, glucose, hemoglobin, uric acid, total cholesterol, LDL, HDL, and triglycerides.
      Results: Vitamin D deficiency was present in 55 CKD patients and normal vitamin D levels were seen in 149 patients. There was a significant association between vitamin D and estimated glomerular filtration rate (eGRF). Homocysteine levels were best predicted by eGRF, sex, and age; high sensitivity C-reactive protein (hsCRP) by staging and BMI; nitric oxide metabolites (NOx) were increased in late disease; leptin was influenced by BMI and higher in women than man; and adiponectin levels were higher in women.
      Conclusions: OS biomarkers were not correlated with vitamin D deficiency but increased NOx were seen in stages 4-5 CKD patients. Even though a relatively large number of CKD patients was included and a broad number of OS and inflammatory biomarkers were used in this studied we failed to find an association between vitamin D levels and eGRF. More studies are needed to evaluate the influence of vitamin D status in OS in pre-dialysis CKD patients.
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    • Accession Number:
      1406-16-2 (Vitamin D)
    • Publication Date:
      Date Created: 20200515 Date Completed: 20210818 Latest Revision: 20240806
    • Publication Date:
      20240806
    • Accession Number:
      PMC7860644
    • Accession Number:
      10.1590/2175-8239-JBN-2019-0156
    • Accession Number:
      32406474