Rapid Insulin-Mediated Increase in Microvascular Glycocalyx Accessibility in Skeletal Muscle May Contribute to Insulin-Mediated Glucose Disposal in Rats
| Autor: | Bart Eskens, Jurgen W. G. E. VanTeeffelen, Jack P.M. Cleutjens, Hans Vink, Johanna E. Cobelens, Jozef M. A. Roos, Hans L. Mooij |
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| Přispěvatelé: | Other departments, Promovendi CD, Pathologie, Ondersteunend personeel CD, Fysiologie |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Male
Anatomy and Physiology Erythrocytes Muscle Functions Glucose uptake medicine.medical_treatment lcsh:Medicine Blood volume Hematocrit Cardiovascular Cardiovascular System Insulin Antagonists Endocrinology Insulin Cardiovascular Imaging lcsh:Science Musculoskeletal System Multidisciplinary Blood Volume medicine.diagnostic_test Histological Techniques Animal Models Cremaster muscle Circulatory Physiology Muscle Medicine Research Article medicine.medical_specialty Histology Hyaluronoglucosaminidase Endocrine System Biology Glycocalyx Microcirculation Insulin resistance Model Organisms Vascular Biology Internal medicine medicine Animals Rats Wistar Muscle Skeletal Diabetic Endocrinology Analysis of Variance Endocrine Physiology lcsh:R Diabetes Mellitus Type 2 medicine.disease Rats Glucose Microvessels Rat lcsh:Q Insulin Resistance |
| Zdroj: | PLoS ONE PLoS ONE, 8(1). Public Library of Science PLOS ONE, 8(1):e55399. Public Library of Science PLoS ONE, Vol 8, Iss 1, p e55399 (2013) |
| ISSN: | 1932-6203 |
| Popis: | It has been demonstrated that insulin-mediated recruitment of microvascular blood volume is associated with insulin sensitivity. We hypothesize that insulin rapidly stimulates penetration of red blood cells (RBC) and plasma into the glycocalyx and thereby promotes insulin-mediated glucose uptake by increasing intracapillary blood volume. Experiments were performed in rats; the role of the glycocalyx was assessed by enzymatic degradation using a bolus of hyaluronidase. First, the effect of insulin on glycocalyx accessibility was assessed by measuring the depth of penetration of RBCs into the glycocalyx in microvessels of the gastrocnemius muscle with Sidestream Dark-field imaging. Secondly, peripheral insulin sensitivity was determined using intravenous insulin tolerance tests (IVITT). In addition, in a smaller set of experiments, intravital microscopy of capillary hemodynamics in cremaster muscle and histological analysis of the distribution of fluorescently labeled 40 kDa dextrans (D40) in hindlimb muscle was used to evaluate insulin-mediated increases in capillary blood volume. Insulin increased glycocalyx penetration of RBCs by 0.34 +/- 0.44 mu m (P |
| Databáze: | OpenAIRE |
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