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Myeloperoxidase-induced fibrinogen unfolding and clotting.
Barinov, Nikolay A; Pavlova, Elizaveta R; Tolstova, Anna P; Matveeva, Ainur G; Moskalets, Aleksandr P; Dubrovin, Evgeniy V; Klinov, Dmitry V.
Afiliação
  • Barinov NA; Department of Biophysics, Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow, Russian Federation.
  • Pavlova ER; Scientific and educational resource center for innovative technologies of immunophenotyping, digital spatial profiling and ultrastructural analysis (molecular morphology), Peoples' Friendship University of Russia (RUDN University), Moscow, Russian Federation.
  • Tolstova AP; Department of Biophysics, Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow, Russian Federation.
  • Matveeva AG; Scientific and educational resource center for innovative technologies of immunophenotyping, digital spatial profiling and ultrastructural analysis (molecular morphology), Peoples' Friendship University of Russia (RUDN University), Moscow, Russian Federation.
  • Moskalets AP; Laboratory of protein conformational polymorphism in health and disease, Engelhardt Institute of Molecular Biology, Moscow, Russian Federation.
  • Dubrovin EV; Department of Biophysics, Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow, Russian Federation.
  • Klinov DV; Scientific and educational resource center for innovative technologies of immunophenotyping, digital spatial profiling and ultrastructural analysis (molecular morphology), Peoples' Friendship University of Russia (RUDN University), Moscow, Russian Federation.
Microsc Res Tech ; 85(7): 2537-2548, 2022 Jul.
Article em En | MEDLINE | ID: mdl-35315962
ABSTRACT
Due to its unique properties and high biomedical relevance fibrinogen is a promising protein for the development of various matrixes and scaffolds for biotechnological applications. Fibrinogen molecules may form extensive clots either upon specific cleavage by thrombin or in thrombin-free environment, for example, in the presence of different salts. Here, we report the novel type of non-conventional fibrinogen clot formation, which is mediated by myeloperoxidase and takes place even at low fibrinogen concentrations (<0.1 mg/ml). We have revealed fibrillar nature of myeloperoxidase-mediated fibrinogen clots, which differ morphologically from fibrin clots. We have shown that fibrinogen clotting is mediated by direct interaction of myeloperoxidase molecules with the outer globular regions of fibrinogen molecules followed by fibrinogen unfolding from its natural trinodular to a fibrillar structure. We have demonstrated a major role of the Debye screening effect in regulating of myeloperoxidase-induced fibrinogen clotting, which is facilitated by small ionic strength. While fibrinogen in an aqueous solution with myeloperoxidase undergoes changes, the enzymatic activity of myeloperoxidase is not inhibited in excess of fibrinogen. The obtained results open new insights into fibrinogen clotting, give new possibilities for the development of fibrinogen-based functional biomaterials, and provide the novel concepts of protein unfolding.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Trombose / Fibrinogênio Limite: Humans Idioma: En Revista: Microsc Res Tech Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Trombose / Fibrinogênio Limite: Humans Idioma: En Revista: Microsc Res Tech Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2022 Tipo de documento: Article