The Renal Microcirculation

Supplement 9. Handbook of Physiology, The Cardiovascular System, Microcirculation
L Gabriel Navar

L Gabriel Navar

Department of Physiology, Tulane University, New Orleans, LA, USA

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William J Arendshorst

William J Arendshorst

Department of Cell and Molecular Physiology, University of North Carolina, Chapel Hill, NC, USA

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Thomas L Pallone

Thomas L Pallone

Department of Medicine, University of Maryland, Baltimore, MD, USA

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Edward W Inscho

Edward W Inscho

Department of Physiology, Medical College of Georgia, Augusta, GA, USA

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John D Imig

John D Imig

Department of Physiology and Cardiovascular Center, Medical College of Wisconsin, WI, USA

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P Darwin Bell

P Darwin Bell

Department of Medicine, Medical University of South Carolina, Charleston, SC, USA

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Published online: 1 January 2011
Citations: 6

Abstract

The sections in this article are:

  • 1 Introduction
  • 2 Structural-Functional Aspects Unique to the Renal Microcirculation
    • 2.1 Microvasculature of the renal cortex
    • 2.2 Glomerular and peritubular capillary networks
      • 2.2.1 Glomerular capillaries
      • 2.2.2 Peritubular capillaries
    • 2.3 Renal interstitium and lymphatics
    • 2.4 Microvasculature of the renal medulla
    • 2.5 Juxtaglomerular complex and macula densa
    • 2.6 Innervation of the renal vascular structures
  • 3 Fluid and Solute Transcapillary Exchange in Renal Microcirculation
    • 3.1 Glomerular ultrafiltration
    • 3.2 Restricted permeability to macromolecules in glomerular capillaries
    • 3.3 Peritubular capillaries and uptake of tubular reabsorbate
    • 3.4 Regulation of the filtration coefficient
    • 3.5 Transport of solutes and water in medullary microvasculature
      • 3.5.1 Transport of water across the DVR wall
      • 3.5.2 Transport of NaCl and urea in DVR and RBC
      • 3.5.3 Transport of solutes and water across the AVR wall
      • 3.5.4 AQPl and the enhancement of exchanger efficiency
      • 3.5.5 Transport of macromolecules in medulla
  • 4 Vascular Activating Mechanisms and Intrinsic Control of Renal Microcirculation
    • 4.1 Membrane activating mechanisms
      • 4.1.1 Voltage-dependent calcium channels
      • 4.1.2 Voltage-independent, non-selective cation channels, store-operated channels (SOC), ROC, and transient receptor potential (TRP) channels
      • 4.1.3 Chloride channels
      • 4.1.4 Potassium channels
      • 4.1.5 Connexins
    • 4.2 Mechanosensitive responses and renal autoregulation
    • 4.3 TGF mechanism
  • 5 Endothelial Interactions with Renal Vasculature
    • 5.1 Endothelial-derived vasoactive factors
    • 5.2 Nitric oxide
      • 5.2.1 Intrarenal formation of NO
      • 5.2.2 Renal cellular actions of NO
      • 5.2.3 NO mediated responses of the renal vasculature
      • 5.2.4 Inhibition of NO Synthesis
      • 5.2.5 Effects of NO substrate and donors
      • 5.2.6 Renal microcirculatory responses to NOS inhibition
      • 5.2.7 Role of NO in renal autoregulation
      • 5.2.8 Interactions of NO with other vasoactive factors
    • 5.3 Endothelin and renal hemodynamics
      • 5.3.1 Endothelin and ET receptors
      • 5.3.2 Endothelin effects on renal hemodynamics
    • 5.4 Endothelin effects on renal microcirculation
      • 5.4.1 Cellular mechanisms of action of ET
    • 5.5 Heme oxygenase and CO
    • 5.6 Reactive oxygen species
  • 6 Renin-Angiotensin System
    • 6.1 Intrarenal formation of Ang II
    • 6.2 Intrarenal angiotensin receptors
    • 6.3 Actions of Ang II on renal microvasculature and renal hemodynamics
    • 6.4 Differential activation and signal transduction mechanisms on afferent and efferent arterioles
      • 6.4.1 Ang II activation of membrane channels
      • 6.4.2 Differential activation mechanisms in afferent and efferent arterioles
    • 6.5 Responses to ACE inhibitors and Ang II receptor blockers
    • 6.6 Actions of intrarenally formed Ang II and renal interstitial Ang II
    • 6.7 Modulation of TGF responsiveness by Ang II
    • 6.8 Synergistic interactions between renal vascular and tubular effects of Ang II
  • 7 Arachidonic Acid Related Paracrine Factors: Cyclooxygenase, Lipoxygenase, Cytochrome P450 Pathways
    • 7.1 Enzymes that metabolize eicosanoids
    • 7.2 Renal microcirculatory actions of COX metabolites
    • 7.3 Renal microcirculatory actions of CYP metabolites
    • 7.4 Renal microcirculatory actions of LOX metabolites
    • 7.5 Renal microvascular interactions between hormonal and paracrine factors and eicosanoids
    • 7.6 Role of eicosanoids in renal autoregulation
    • 7.7 Conclusions
  • 8 Purinergic Factors Regulating the Renal Microcirculation
    • 8.1 Overview of purinoceptors
    • 8.2 Purinoceptors and their expression in the kidney
    • 8.3 Purinoceptors and renal hemodynamics
    • 8.4 Purinoceptors and the renal microcirculation: single vessel studies
    • 8.5 Purinoceptors and renal autoregulation and TGF
      • 8.5.1 Purinoceptors in hypertension
  • 9 Mechanisms Regulating Medullary Microcirculation
    • 9.1 Introduction
    • 9.2 Reduction of intramedullary hematocrit
    • 9.3 The unique requirements of renal medullary perfusion
    • 9.4 Autoregulation and pressure natriuresis
    • 9.5 Diuresis and vasopressin
    • 9.6 Angiotensin and medullary perfusion
    • 9.7 Nitric oxide
    • 9.8 Reactive oxygen species
    • 9.9 Carbon monoxide
    • 9.10 Endothelial-derived hyperpolarizing factor
    • 9.11 Arachadonic acid metabolite
      • 9.11.1 Prostaglandins
      • 9.11.2 Cytochrome P450 metabolites of arachidonic acid
    • 9.12 Kinins
    • 9.13 Adenosine
    • 9.14 Endothelins
  • 10 Neural Factors and Catecholamines
    • 10.1 Innervation of the renal vascular structures
    • 10.2 Neural effects on renal hemodynamics and microcirculation
    • 10.3 Segmental vascular resistance and glomerular hemodynamics
    • 10.4 Effects of renal nerves on autoregulation
    • 10.5 Neural interactions with paracrine factors
    • 10.6 Co-neurotransmitters
    • 10.7 Afferent renal nerves
  • 11 Concluding Comments
  • 12 Acknowledgments

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