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Article Dans Une Revue Carbohydrate Polymers Année : 2022

Binding of heparan sulfate to human cystatin C modulates inhibition of cathepsin L: Putative consequences in mucopolysaccharidosis

Résumé

Mucopolysaccharidoses (MPS) are a group of rare lysosomal storage diseases characterized by glycosaminoglycan (GAG) accumulation causing progressive multi-organs dysfunction and ultimately severe cardio-respiratory damages. Human cystatin C (hCC), a potent inhibitor of cysteine cathepsins, plays an important role in respiratory diseases. However, its regulation remained unknown in MPS. Herein, elevated hCC levels were measured in respiratory specimens from MPS-I, -II, and -III patients and were significantly correlated with severe respiratory symptoms (rs = 0.7173). Heparan sulfate (HS), a prominent GAG, dampened its inhibitory activity toward cathepsin L in a dose-dependent manner. HS and HS-oligosaccharides bound tightly hCC, in combination with a secondary structure rearrangement. Molecular modeling studies identified three HS binding regions in hCC, including the N-terminus, which is crucial in the inhibition of cathepsins. Impairment of inhibitory potential of hCC may reflect abnormal regulation of proteolytic activity of cathepsin L in lung, ultimately contributing to the severity of MPS.
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Dates et versions

hal-03706052 , version 1 (22-11-2023)

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Sophie Denamur, Thibault Chazeirat, Martyna Maszota-Zieleniak, Romain Vivès, Ahlame Saidi, et al.. Binding of heparan sulfate to human cystatin C modulates inhibition of cathepsin L: Putative consequences in mucopolysaccharidosis. Carbohydrate Polymers, 2022, 293, pp.119734. ⟨10.1016/j.carbpol.2022.119734⟩. ⟨hal-03706052⟩
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