The effect of hypochlorite-induced fibrinogen oxidation on the protein structure, fibrin self-assembly and fibrinolysis

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Abstract

The article is dedicated to the structural-functional damage of fibrinogen treated with HOCl in the concentration range (10–100 µM). The MS/MS method detected 15 modified amino acid residues with a dose-dependent susceptibility to the oxidizing agent. Using turbidity measurements and confocal laser scanning microscopy, it has been shown that fibrinogen oxidation by 25–100 µM HOCl leads to the denser fibrin gel formation, as well as delayed polymerization onset and a decrease in the slope of the polymerization curve, presumably due to conformational changes of the protein. At lower HOCl concentration (10 µM), at least six amino acid residues were substantially modified (9–29%), but functionally such modified protein was not distinguishable from the native one. The detected amino acid residues are assumed to be ROS scavengers that prevent fibrinogen functions alteration.

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About the authors

L. V. Yurina

Emanuel Institute of Biochemical Physics, Russian Academy of Sciences

Author for correspondence.
Email: lyu.yurina@gmail.com
Russian Federation, Moscow

A. D. Vasilyeva

Emanuel Institute of Biochemical Physics, Russian Academy of Sciences

Email: lyu.yurina@gmail.com
Russian Federation, Moscow

E. G. Evtushenko

Lomonosov Moscow State University

Email: lyu.yurina@gmail.com

Faculty of Chemistry

Russian Federation, Moscow

E. S. Gavrilina

Emanuel Institute of Biochemical Physics, Russian Academy of Sciences

Email: lyu.yurina@gmail.com
Russian Federation, Moscow

S. I. Obydennyi

Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology of Ministry of Healthcare of the Russian Federation; Centre for Theoretical Problems of Physicochemical Pharmacology

Email: lyu.yurina@gmail.com
Russian Federation, Moscow; Moscow

I. A. Chabin

Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology of Ministry of Healthcare of the Russian Federation; Sechenov First Moscow State Medical University (Sechenov University)

Email: lyu.yurina@gmail.com
Russian Federation, Moscow; Moscow

M. I. Indeykina

Emanuel Institute of Biochemical Physics, Russian Academy of Sciences

Email: lyu.yurina@gmail.com
Russian Federation, Moscow

A. S. Kononikhin

Talrose Institute for Energy Problems of Chemical Physics, N.N. Semenov Federal Center of Chemical Physics, Russian Academy of Sciences; Skolkovo Institute of Science and Technology

Email: lyu.yurina@gmail.com
Russian Federation, Moscow; Moscow

E. N. Nikolaev

Talrose Institute for Energy Problems of Chemical Physics, N.N. Semenov Federal Center of Chemical Physics, Russian Academy of Sciences; Skolkovo Institute of Science and Technology

Email: lyu.yurina@gmail.com
Russian Federation, Moscow; Moscow

M. A. Rosenfeld

Emanuel Institute of Biochemical Physics, Russian Academy of Sciences

Email: lyu.yurina@gmail.com
Russian Federation, Moscow

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2. Fig. 1. Schematic representation of fibrinogen polypeptide chains with modification sites marked.

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3. Fig. 2. Representative curves of thrombin-catalyzed fibrin polymerization (a) and fibrinolysis (b) at the following [HOCl] values ​​in μM: 1 – 0, 2 – 10, 3 – 25, 4 – 50, 5 – 100.

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4. Fig. 3. Changes in the static structure of the fibrin clot (left column; at HOCl concentrations of 0, 10, 25, 50 μM) and the dynamics of plasmin(ogen) distribution during fibrinolysis (columns 2–4).

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