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Related Experiment Videos

Consequences of alteration in capillary permeability

G E Plante1, M Chakir, K Ettaouil

  • 1Department of Medicine, Université de Sherbrooke, Canada.

Canadian Journal of Physiology and Pharmacology
|July 1, 1996
PubMed
Summary

Altered capillary permeability impacts nutrient delivery and waste removal, contributing to organ damage in diseases like hypertension and diabetes. Pharmacological interventions targeting vascular tone and endothelial permeability show promise for restoring normal function.

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Area of Science:

  • Physiology
  • Pathophysiology
  • Pharmacology

Background:

  • Capillary permeability is crucial for nutrient and waste exchange, maintaining cellular life.
  • Dysregulation of capillary permeability and endothelium-interstitium interactions contribute to multiorgan diseases.
  • Neurohumoral control mechanisms of microcirculation are beginning to be understood.

Purpose of the Study:

  • To review alterations in capillary permeability, focusing on extravasation determinants, endothelium-interstitium relationships, and pharmacological modulation.
  • To examine the role of capillary permeability in systemic disorders and its impact on organ damage.
  • To discuss emerging pharmacological strategies for controlling capillary permeability and interstitial matrix characteristics.

Main Methods:

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  • Review of recent laboratory observations and existing literature on capillary permeability.
  • Analysis of experimental animal models of arterial hypertension, diabetes mellitus, heart failure, and degenerative renal diseases.
  • Examination of pharmacological agents targeting vascular tonus and endothelial permeability.

    • Main Results:

    • Capillary extravasation is influenced by pre- and post-capillary resistances and endothelial permeability.
    • Endothelium-interstitium interactions regulate nutrient transport and waste removal, vital for cell function.
    • Altered capillary permeability and interstitial matrix composition are implicated in organ damage in systemic diseases.
    • Pharmacological interventions like angiotensin II antagonism and bradykinin B1-receptor inhibition can normalize permeability defects.

    Conclusions:

    • Modulation of capillary permeability is essential for cellular life and organ function.
    • Dysfunctional endothelium-interstitium relationships are a common denominator in multiorgan diseases.
    • Targeting capillary permeability and interstitial matrix offers therapeutic potential for systemic disorders.