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The Degradation of Hyaluronan in the Skin.

Biomolecules (2022-02-26)
Petra Žádníková, Romana Šínová, Vojtěch Pavlík, Matěj Šimek, Barbora Šafránková, Martina Hermannová, Kristina Nešporová, Vladimír Velebný
ABSTRACT

Hyaluronan (HA) comprises a fundamental component of the extracellular matrix and participates in a variety of biological processes. Half of the total amount of HA in the human body is present in the skin. HA exhibits a dynamic turnover; its half-life in the skin is less than one day. Nevertheless, the specific participants in the catabolism of HA in the skin have not yet been described in detail, despite the essential role of HA in cutaneous biology. A deeper knowledge of the processes involved will act to support the development of HA-based topical and implantable materials and enhance the understanding of the various related pathological cutaneous conditions. This study aimed to characterize the distribution and activity of hyaluronidases and the other proteins involved in the degradation of HA in healthy human full-thickness skin, the epidermis and the dermis. Hyaluronidase activity was detected for the first time in healthy human skin. The degradation of HA occurred in lysates at an acidic pH. HA gel zymography revealed a single band corresponding to approximately 50 kDa. This study provided the first comprehensive view of the distribution of canonic HA-degrading proteins (HYAL1 and HYAL2) in human skin employing IHF and IHC. Furthermore, contrary to previous assumptions TMEM2, a novel hyaluronidase, as well as CEMIP, a protein involved in HA degradation, were localized in the human epidermis, as well as in the dermis.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Hyaluronidase from Streptomyces hyalurolyticus
Sigma-Aldrich
Anti-KIAA1199 antibody produced in rabbit, affinity isolated antibody
Sigma-Aldrich
Monoclonal Anti-GAPDH antibody produced in mouse, clone 3C2, purified immunoglobulin, buffered aqueous solution
Sigma-Aldrich
Hyaluronic Acid Binding Protein, Bovine Nasal Cartilage, Biotinylated
Sigma-Aldrich
Streptavidin−FITC from Streptomyces avidinii, essentially salt-free, lyophilized powder, ≥5 units/mg protein