Hyaluronidase 1 and hyaluronidase 2 are required for renal hyaluronan turnover
| Autor: | Bruno Flamion, Isabelle Habsch, Virginie Voisin, Laetitia Giordano, Anne-Emilie Decleves, Inès Jadot, Vanessa Colombaro, Nathalie Caron |
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| Rok vydání: | 2014 |
| Předmět: |
Histology
Kidney Cortex Renal function Hyaluronoglucosaminidase Kidney GPI-Linked Proteins Gene Expression Regulation Enzymologic Mice Interstitial space Hyaluronidase medicine Extracellular Animals Glucuronosyltransferase Hyaluronic Acid Hyaluronan Mice Knockout Chemistry Cell Biology General Medicine Molecular biology medicine.anatomical_structure Biochemistry Knockout mouse Immunohistochemistry Hyaluronidases Hyaluronan Synthases Intracellular medicine.drug |
| Zdroj: | Acta histochemica. 117(1) |
| ISSN: | 1618-0372 |
| Popis: | Hyaluronidase 1 (HYAL1) and hyaluronidase 2 (HYAL2) are the major hyaluronidases acting synergistically to degrade hyaluronan (HA). In the kidney, HA is distributed heterogeneously. Our goal was to determine the consequences of a lack of either HYAL1 or HYAL2 (using specific knockout mice) on renal function and on renal HA accumulation. Experiments were performed in Hyal1-/- and Hyal2-/- mice and in their wild-type controls. HA concentration was measured in the plasma and kidney tissue and its distribution through the different kidney zones was examined by immunohistochemistry. Relative mRNA expressions of HYAL1, HYAL2 and the 3 main HA synthases were evaluated by quantitative RT-PCR. Results: Kidney function was not impaired in the knockout mice but they displayed elevated HA concentrations in the plasma and in the kidney. Hyal1-/- mice presented an accumulation of HA inside the proximal tubular cells whereas Hyal2-/- mice showed HA accumulation in the interstitial space. In the cortex and in the outer medulla, HYAL1 mRNA expression was up-regulated in Hyal2-/- mice. From our study we conclude that somatic hyaluronidases are not required for renal function. However, HYAL1 is necessary for the breakdown of intracellular HA in the cortex, whereas HYAL2 is essential for the degradation of extracellular HA in all kidney regions. |
| Databáze: | OpenAIRE |
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