Netrin-1 and kidney injury. II. Netrin-1 is an early biomarker of acute kidney injury

W. Brian Reeves, Osun Kwon, Ganesan Ramesh

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Acute kidney injury is an important complication in hospitalized patients often diagnosed late and associated with high mortality and morbidity. Although biomarkers for nephrotoxicity are available, they often lack sensitivity and specificity for detecting tubular injury. Netrin-1 is a laminin-like molecule highly expressed in many organs including kidney. To determine the value of netrin-1 as a biomarker of renal injury, we analyzed its urinary excretion following ischemia-reperfusion-, cisplatin-, folic acid-, and endotoxin-induced renal injury in mice. Urinary netrin-1 levels increased markedly within 3 h of ischemia-reperfusion (40 ± 14-fold, P < 0.01 vs. baseline), reached a peak level at 6 h, and decreased thereafter, returning to near baseline by 72 h. Serum creatinine significantly increased only after 24 h of reperfusion. Similarly, in cisplatin-, folic acid-, and lipopolysaccharide-treated mice, urine netrin-1 excretion increased as early as 1 h and reached a peak level at 6 h after injection. However, serum creatinine was raised significantly after 6, 24, and 72 h after folic acid, lipopolysaccharide, and cisplatin administration, respectively. NGAL excretion in folic acid- and lipopolysaccharide-treated mice urine samples could only be detected by 24 h after drug administration. Furthermore, urinary netrin-1 excretion increased dramatically in 13 acute renal failure patients, whereas none was detected in 6 healthy volunteer urine samples. Immunohistochemical localization showed that netrin-1 is highly expressed in tubular epithelial cells in transplanted human kidney. We conclude that urinary netrin-1 is a promising early biomarker of renal injury.

Original languageEnglish (US)
Pages (from-to)F731-F738
JournalAmerican Journal of Physiology - Renal Physiology
Volume294
Issue number4
DOIs
StatePublished - Apr 1 2008

Fingerprint

Acute Kidney Injury
Biomarkers
Kidney
Folic Acid
Wounds and Injuries
Cisplatin
Reperfusion
Lipopolysaccharides
Urine
Creatinine
Ischemia
Laminin
netrin-1
Serum
Endotoxins
Healthy Volunteers
Epithelial Cells
Morbidity
Sensitivity and Specificity
Injections

Keywords

  • Acute renal failure
  • Cisplatin
  • Folic acid
  • Ischemia-reperfusion injury

ASJC Scopus subject areas

  • Physiology
  • Urology

Cite this

Netrin-1 and kidney injury. II. Netrin-1 is an early biomarker of acute kidney injury. / Reeves, W. Brian; Kwon, Osun; Ramesh, Ganesan.

In: American Journal of Physiology - Renal Physiology, Vol. 294, No. 4, 01.04.2008, p. F731-F738.

Research output: Contribution to journalArticle

Reeves, W. Brian ; Kwon, Osun ; Ramesh, Ganesan. / Netrin-1 and kidney injury. II. Netrin-1 is an early biomarker of acute kidney injury. In: American Journal of Physiology - Renal Physiology. 2008 ; Vol. 294, No. 4. pp. F731-F738.
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