What question did this study set out to answer?

To elucidate the cellular mechanisms responsible for increased microvascular permeability in diabetes by assessing albumin transport across myocardial capillaries.

May 1, 1993Circulation ResearchOpen Access

Increased capillary permeability to albumin in diabetic rat myocardium.

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To elucidate the cellular mechanisms responsible for increased microvascular permeability in diabetes by assessing albumin transport across myocardial capillaries.
Diabetes was induced in rats using intravenous streptozotocin, with hearts evaluated after 24–32 weeks alongside age-matched and food-restricted control groups.
Isolated hearts were perfused with Krebs-Henseleit buffer containing albumin-gold (Alb-Au) complexes for 5 or 20 minutes, followed by quantitative electron microscopy of endothelial binding and transport.
After 20 minutes, vesicular transport of Alb-Au across capillary endothelium increased significantly in diabetic myocardium compared to controls (abluminal labeled vesicles: 25.9 ± 5.5% vs. 1.3 ± 0.5%; p < 0.01).
Diabetic rats showed pronounced Alb-Au labeling of luminal plasmalemmal vesicles and plasma membranes at 5 minutes, while intercellular junctions remained impermeable in both groups.
Caloric restriction in non-diabetic controls with matched weight loss showed no significant effect on capillary permeability, confirming diabetes as the primary driver.

Structured PICO

Population

Rats with streptozotocin-induced diabetes (24-32 weeks duration), age-matched control rats, and food-restricted rats

Intervention

Streptozotocin-induced diabetes

Comparator

Age-matched control rats and food-restricted rats

Outcome

Capillary permeability to albumin (binding and transport of Alb-Au by capillary endothelium)surrogate

Capillary permeability to albumin is markedly increased in diabetic rat myocardium due to enhanced vesicular transport, suggesting a mechanism for the pathogenesis of diabetic cardiomyopathy.

Discussion

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Implication

Does not warrant clinical practice changes; hypothesis-generating for vesicular transport in diabetic cardiomyopathy pathogenesis.

Cite This Study

Yamaji et al. (1993) studied this question.

synapsesocial.com/papers/6a092d181d1abd907d16095d https://doi.org/10.1161/01.res.72.5.947

Topics

Sermorelin

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Increased capillary permeability to albumin in diabetic rat myocardium.

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Topics

Increased capillary permeability to albumin in diabetic rat myocardium.

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Topics

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