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The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
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A Modified Two Kidney One Clip Mouse Model of Renin Regulation in Renal Artery Stenosis
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Published on: October 26, 2020

Enhancing complement control on endothelial barrier reduces renal post-ischemia dysfunction.

Sathnur B Pushpakumar1, Gustavo Perez-Abadia, Chirag Soni

  • 1Department of Physiology and Biophysics, University of Louisville, Louisville, Kentucky, USA.

The Journal of Surgical Research
|August 6, 2011
PubMed
Summary
This summary is machine-generated.

Enhancing kidney endothelial complement control with vaccinia virus complement control protein (VCP) significantly reduces ischemia-reperfusion injury (IRI) and improves graft function. This targeted approach minimizes systemic side effects associated with IRI treatments.

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Area of Science:

  • Transplantation immunology
  • Renal physiology
  • Complement system biology

Background:

  • Excessive complement activation drives ischemia-reperfusion injury (IRI) in organs, a key factor in kidney transplant complications like delayed graft function and acute rejection.
  • Current IRI treatments targeting complement activation often require systemic administration, increasing infection and immune disease risks.
  • The study investigates a localized endothelial complement control strategy to mitigate kidney IRI.

Purpose of the Study:

  • To determine if augmenting complement control defenses on rat kidney endothelium can reduce ischemia-reperfusion injury (IRI).
  • To test the hypothesis that enhanced endothelial complement control limits IR-mediated complement activation and subsequent kidney dysfunction.

Main Methods:

  • Fischer 344 rats underwent 45 minutes of left kidney ischemia followed by reperfusion.
  • A novel fusogenic lipid vesicle (FLVs) system delivered vaccinia virus complement control protein (VCP) to endothelial cells.
  • Renal function (serum creatinine, urea), neutrophil infiltration (myeloperoxidase), histopathology, and C3 production were assessed post-reperfusion.

Main Results:

  • FLVs+VCP treatment significantly improved renal function, evidenced by reduced serum creatinine levels compared to controls (P < 0.05).
  • Complement component C3 production was significantly lower in treated kidneys than in vehicle controls (P < 0.05).
  • Histopathology and neutrophil infiltration data supported the functional improvements observed.

Conclusions:

  • Boosting endothelial complement control with FLVs+VCP effectively modulates complement activation and production within the initial 24 hours post-reperfusion.
  • This localized strategy significantly reduces renal dysfunction following kidney ischemia-reperfusion injury (IRI).
  • Targeting endothelial complement control offers a promising therapeutic avenue for mitigating kidney IRI in transplantation.