Hyaluronidase 1 deficiency preserves endothelial function and glycocalyx integrity in early streptozotocin-induced diabetes.
(2016) Diabetes — Vol. 65, n° 9, p. 2742-2753 (2016)
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- Hyaluronic acid (HA) is a major component of the glycocalyx involved in vascular wall and endothelial glomerular permeability barrier. Endocytosed hyaluronidase HYAL1 is known to degrade HA into small fragments in different cell types including endothelial cells. In diabetes, the size and permeability of the glycocalyx are altered. In addition, type 1 diabetic patients present increased plasma levels of both HA and HYAL1.To investigate the potential implication of HYAL1 in the development of diabetes-induced endothelium dysfunction, we measured endothelial markers, endothelium-dependent vasodilation, arteriolar glycocalyx size, and glomerular barrier properties in wild-type and HYAL1 knockout (KO) mice with or without streptozotocin-induced diabetes. We observed that, 4 weeks after streptozotocin injections, the lack of HYAL1: 1) prevents diabetes-induced increases in soluble P-selectin concentrations and limits the impact of the disease on endothelium-dependent hyperpolarization (EDH)-mediated vasorelaxation; 2) increases glycocalyx thickness and maintains glycocalyx structure and HA content during diabetes; 3) prevents diabetes-induced glomerular barrier dysfunction assessed using urinary albumin/creatinine ratio and urinary 70/40-kDa dextran ratio. Our findings suggest that HYAL1 contributes to endothelial and glycocalyx dysfunction induced by diabetes. HYAL1 inhibitors could be explored as a new therapeutic approach to prevent vascular complications in diabetes.
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Dogné, S., Rath, G., Jouret, F., Caron, N., Dessy, C., & Flamion, B. (2016). Hyaluronidase 1 deficiency preserves endothelial function and glycocalyx integrity in early streptozotocin-induced diabetes. Diabetes, 65(9), 2742-2753. https://doi.org/10.2337/db15-1662 (Original work published 2016)