title: Plasma cell-free DNA levels in children on peritoneal dialysis.
abstract: OBJECTIVE
  Plasma levels of cell-free DNA (cfDNA) are elevated in various clinical conditions including cancer, stroke, trauma, myocardial infarction, autoimmune disorders, and pregnancy-associated complications. Previously, increased cfDNA levels were reported during hemodialysis. However, there is limited data regarding cfDNA levels in peritoneal dialysis (PD) patients. The aim of this study was to investigate the levels of cfDNA in children on PD.
  
  
  METHODS
  Twenty-one children on PD (median age: 12; range: 4-18 years) and 21 healthy children (median age: 10; range: 6-16 years) were enrolled into the study. Plasma cfDNA was measured using a real-time quantitative PCR for the beta-globin gene.
  
  
  RESULTS
  The median concentrations of cfDNA in the plasma of PD patients and healthy controls were 2,205 genome-equivalents/ml of plasma (range: 39-5,845) and 1,033 genome-equivalents/ml of plasma (range: 254-5,116), respectively (p = 0.026). A significant positive correlation was observed between C-reactive protein levels and plasma cfDNA levels (r: 0.52, p < 0.0001).
  
  
  CONCLUSIONS
  Our data have demonstrated for the first time that cfDNA is increased in children on PD treatment. However, the mechanism by which the levels of cfDNA is increased and the clinical significance of this finding in PD patients is unclear. Further studies are warranted to clarify the precise mechanism and clinical significance of elevated cfDNA in children on PD.
authors.affiliation: Department of Pediatric Nephrology, Ondokuz Mayis University, School of Medicine, Samsun, Turkey. ozanozkaya@yahoo.com
authors.forename: O
authors.initials: O
authors.lastname: Ozkaya
authors.forename: K
authors.initials: K
authors.lastname: Bek
authors.forename: A
authors.initials: A
authors.lastname: Bedir
authors.forename: Y
authors.initials: Y
authors.lastname: Açikgöz
authors.forename: T
authors.initials: T
authors.lastname: Ozdemir
mesh_terms: D000293:Adolescent; D002474:Cell-Free System / Q000378:metabolism*; D002648:Child; D002675:Child, Preschool; D004247:DNA / Q000097:blood*; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000534:rehabilitation*; D008297:Male; D010530:Peritoneal Dialysis
chemical_list: D004247:DNA