Hypochlorite-induced oxidation of fibrinogen: Effects on its thermal denaturation and fibrin structure.
Biochim Biophys Acta Gen Subj
; 1865(10): 129970, 2021 10.
Article
in En
| MEDLINE
| ID: mdl-34339807
ABSTRACT
BACKGROUND:
Human fibrinogen, which plays a key role in plasma haemostasis, is a highly vulnerable target for oxidants. Fibrinogen undergoes posttranslational modifications that can potentially disrupt protein structure and function.METHODS:
For the first time, by differential scanning calorimetry, dynamic and elastic light scattering and confocal laser scanning microscopy, the consequences of HOCl/-OCl-induced oxidation of fibrinogen on its thermal denaturation, molecular size distribution and fibrin clot network have been explored.RESULTS:
Within a wide range of HOCl/-OCl concentrations (50-300 µM), the molecular size distribution remained unimodal; however, the average size of the hydrated molecules decreased. HOCl/-OCl-induced oxidation of fibrinogen resulted in the diminished thermal stability of regions D and E. As evidenced by elastic light scattering and confocal laser scanning microscopy, HOCl/-OCl caused the formation of abnormal fibrin with a decreased diameter of individual fibres.CONCLUSIONS:
The current results along with data from previous studies enable one to conclude that the effect of HOCl/-OCl-mediated oxidation on the thermal stability of region D is influenced directly by oxidative damage to the D region structure. Since the E region is not subjected to oxidative modification, its structural damage is likely to be mediated by the oxidation of other protein structures, in particular α-helical coiled-coils. GENERALSIGNIFICANCE:
The experimental findings acquired in the current study could help to elucidate the consequences of oxidative stress in vivo on damage to the structure of fibrinogen/fibrin under the action of different ROS species.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Temperature
/
Fibrinogen
/
Fibrin
/
Hypochlorous Acid
Limits:
Adult
/
Humans
Language:
En
Journal:
Biochim Biophys Acta Gen Subj
Year:
2021
Document type:
Article