title: Bone histomorphometry and biochemical markers of bone turnover in patients with chronic kidney disease Stages 3 - 5.
abstract: OBJECTIVE
  Precise identification of renal osteodystrophy requires bone histomorphometry. Several markers of bone turnover may be useful to predict classification and severity of renal osteodystrophy, but there are only limited data whether these markers correlate with bone histomorphometry.
  
  
  METHODS
  In 36 patients with chronic kidney disease (CKD) Stage 3/4 and in 96 patients with CKD Stage 5 bone histomorphometry was performed and renal osteodystrophy was classified according to the standardized international nomenclature. Blood samples were taken at the time of bone biopsy, stored and analyzed at the end of the study.
  
  
  RESULTS
  Osteitis fibrosa (OF) was the most frequent histomorphometric form, occurred in 47.2% in CKD Stages 3 - 4 and in 61.4% in CKD Stage 5. There was no difference in the frequency of adynamic renal bone disease (ARBD). The correlation coefficients between bone turnover markers and histomorphometric parameters were higher in CKD 5 patients with high bone turnover lesions. The predictive value for high versus low/normal bone turnover status was comparable for alkaline phosphatase (APH), bone alkaline phosphatase (BAP), pyridinoline (Pyd), desoxypyridinoline (Dpyd), tartrat-resistent acid phosphatase (TRAP Vb) and parathyroid hormone (PTH) in CKD Stage 5 patients, but was insufficient for APH and TRAP Vb in CKD Stage 3 - 4 patients.
  
  
  CONCLUSIONS
  Besides parathyroid hormone, biochemical parameters of bone turnover provide a moderate discrimination and prediction of bone turnover status only in patients with CKD Stage 5. Due to a large variability, they are of limited use in predicting the histomorphometric type of renal osteodystrophy. Bone histology remains necessary for an exact classification of underlying pathology.
authors.affiliation: Department of Internal Medicine III, University of Jena, Jena, Germany. gabriele.lehmann@med.uni-jena.de
authors.forename: G
authors.initials: G
authors.lastname: Lehmann
authors.forename: U
authors.initials: U
authors.lastname: Ott
authors.forename: D
authors.initials: D
authors.lastname: Kaemmerer
authors.forename: J
authors.initials: J
authors.lastname: Schuetze
authors.forename: G
authors.initials: G
authors.lastname: Wolf
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood*; D001706:Biopsy; D016723:Bone Remodeling; D012080:Chronic Kidney Disease-Mineral and Bone Disorder / Q000097:blood* / Q000473:pathology*; D005260:Female; D006801:Humans; D007085:Ilium / Q000473:pathology*; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood; D006435:Renal Dialysis; D018709:Statistics, Nonparametric
chemical_list: D015415:Biomarkers; D010281:Parathyroid Hormone