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Related Experiment Video

Updated: Jun 17, 2026

Combined Intravital Microscopy and Contrast-enhanced Ultrasonography of the Mouse Hindlimb to Study Insulin-induced Vasodilation and Muscle Perfusion

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Published on: March 20, 2017

Microvascular dysfunction in healthy insulin-sensitive overweight individuals.

Sébastien Czernichow¹, Jerry R Greenfield, Pilar Galan

¹Nutritional Epidemiology Research Unit-UMR U557 INSERM, U1125 INRA, CNAM, CRNH-IdF, France. czernichow@uren.smbh.univ-paris13.fr

Journal of Hypertension

|January 7, 2010

Summary

This summary is machine-generated.

Overweight individuals have lower resting skin capillary density, but increased recruitment during venous congestion. This suggests early microcirculation changes in obesity, preceding endothelial dysfunction.

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Assessment of Human Adipose Tissue Microvascular Function Using Videomicroscopy

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Assessment of Human Adipose Tissue Microvascular Function Using Videomicroscopy

Assessment of Human Adipose Tissue Microvascular Function Using Videomicroscopy

Published on: September 29, 2017

Area of Science:

Cardiovascular Science
Microcirculation Research
Obesity Studies

Background:

Obesity is linked to increased cardiovascular risks.
Skin microcirculation offers a noninvasive window into vascular health.
Previous studies highlight the need to understand early vascular changes in overweight individuals.

Purpose of the Study:

To investigate skin capillary density and endothelial function in overweight/obese versus lean individuals.
To determine if altered microcirculation exists in normotensive, non-diabetic overweight individuals.
To explore the relationship between body mass index (BMI) and skin microvascular parameters.

Main Methods:

Video microscopy was used to measure resting and recruited skin capillary density.
Laser Doppler flowmetry with acetylcholine iontophoresis assessed endothelial-dependent vasodilation.
Endothelial-independent vasodilation was measured after skin heating.
120 overweight and 130 lean individuals were studied.

Main Results:

Resting capillary density showed a negative correlation with BMI.
Overweight individuals exhibited significantly higher capillary recruitment during venous congestion (9.5% vs 5.4%).
Despite lower resting density, capillary density during venous occlusion was similar between groups.
Both endothelial-dependent and independent vasodilation were comparable between overweight and lean groups.

Conclusions:

Higher capillary recruitment in overweight individuals compensates for lower resting density.
Skin microcirculation abnormalities, specifically reduced resting capillary density, may be an early indicator in overweight individuals.
These microcirculatory changes occur independently of overt endothelial dysfunction.