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Renal Ischaemia Reperfusion Injury: A Mouse Model of Injury and Regeneration
12:27

Renal Ischaemia Reperfusion Injury: A Mouse Model of Injury and Regeneration

Published on: June 7, 2014

Chemokine receptor CCR1 regulates inflammatory cell infiltration after renal ischemia-reperfusion injury

Kengo Furuichi1, Ji-Liang Gao, Richard Horuk

  • 1Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.

Journal of Immunology (Baltimore, Md. : 1950)
|December 4, 2008
PubMed

Insights

The chemokine receptor CCR1 (CC chemokine receptor 1) drives neutrophil and macrophage infiltration into kidneys following injury. Blocking CCR1 reduces immune cell presence but does not alter overall tissue damage or kidney function.

Area of Science:

  • Nephrology
  • Immunology
  • Molecular Biology

Background:

  • Neutrophil and macrophage infiltration are key events in kidney injury.
  • Molecular mechanisms of immune cell recruitment to the injured kidney remain incompletely understood.

Purpose of the Study:

  • To investigate the role of chemokine receptor CCR1 in immune cell infiltration after renal ischemia-reperfusion injury (IRI).
  • To determine if CCR1-mediated leukocyte trafficking impacts kidney damage and function.

Main Methods:

  • Utilized a 7-day mouse model of renal ischemia-reperfusion injury.
  • Employed genetic knockout of CCR1 and pharmacologic antagonism (BX471).
  • Quantified neutrophil and macrophage infiltration, chemokine ligand levels (CCL3, CCL5), and assessed kidney injury and function.

Main Results:

  • CCR1-deficient mice exhibited significantly reduced neutrophil (35%) and macrophage (45%) infiltration into injured kidneys by day 7.
  • Administration of a CCR1 antagonist (BX471) similarly suppressed immune cell infiltration.
  • Reduced levels of CCR1 ligands (CCL3, CCL5) were observed in CCR1-deficient kidneys, suggesting a positive feedback loop.
  • CCR1 deficiency did not affect leukocyte proliferation/apoptosis, nor did it alter necrotic/fibrotic damage or renal function decline.

Conclusions:

  • CCR1 plays a critical role in regulating neutrophil and macrophage recruitment to the kidney following IRI.
  • Despite influencing immune cell trafficking, CCR1 activity does not appear to modify the extent of tissue injury or functional impairment in this model.

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