Blood concentrations of α-Klotho and FGF-23 exhibit no correlation with bone mineral density in elderly individuals

Einstein (Sao Paulo). 2024 Sep 20:22:eAO0412. doi: 10.31744/einstein_journal/2024AO0412. eCollection 2024.

Abstract

Objective: To investigating the relationship between α-Klotho and FGF-23 with bone biochemical markers and bone density findings in extremely aged individuals.

Methods: A total of 55 individuals with a mean age of 85.6 years were subjected to clinical, biochemical, and bone mineral density analyses and the enzyme-linked immunosorbent assay-based detection of α-Klotho and FGF-23. The mean, standard deviation, median, and interquartile ranges of the sample values were determined, and Spearman's test for association assessments was used for statistical analysis.

Results: The study participants expressed median FGF-23 and α-Klotho levels of 69.81 RU/mL (51.43 RU/mL) and 733.43 pg/mL (360.83 pg/mL), respectively. The majority of the participants possessed osteopenia (54.5%) and a vitamin D deficiency (57%). The 25-hydroxyvitamin D concentrations ranged between 7.1 and 47.5ng/mL, with a median of 18.1ng/mL.

Conclusion: No substantial associations were discovered between α-Klotho and FGF-23 levels and bone density in the study participants.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Biomarkers* / blood
  • Bone Density* / physiology
  • Bone Diseases, Metabolic* / blood
  • Enzyme-Linked Immunosorbent Assay*
  • Female
  • Fibroblast Growth Factor-23* / blood
  • Fibroblast Growth Factors* / blood
  • Glucuronidase* / blood
  • Humans
  • Klotho Proteins* / blood
  • Male
  • Reference Values
  • Vitamin D / analogs & derivatives
  • Vitamin D / blood
  • Vitamin D Deficiency / blood

Substances

  • Fibroblast Growth Factor-23
  • FGF23 protein, human
  • Fibroblast Growth Factors
  • Klotho Proteins
  • Glucuronidase
  • Biomarkers
  • Vitamin D
  • 25-hydroxyvitamin D