EFFECT OF QUERCETIN ON THE SYSTEMIC INFLAMMATORY RESPONSE AND METABOLIC ALTERATIONS IN REPETITIVE MILD TRAUMATIC BRAIN INJURY UNDER CHRONIC ALCOHOL INTOXICATION
I.M. Adamovych, H.V. Kostenko, O.Ye. Akimov, V.O. Kostenko
- Poltava State Medical University, Ukraine
DOI: https://doi.org/10.15407/fz72.02.020

Abstract
Repetitive mild traumatic brain injury (TBI) under chronic
alcohol intoxication (CAI) represents a prevalent comorbid
condition associated with neuroinflammation, metabolic
disturbances, and an increased risk of chronic traumatic en-
cephalopathy. The search for pharmacological agents capable
of simultaneously mitigating neural tissue damage and cor-
recting systemic metabolic dysregulation is of considerable
scientific and clinical relevance. This study investigated the
effects of quercetin on biomarkers of neural tissue injury,
systemic inflammatory response parameters, and carbohydrate
and lipid metabolism in rats subjected to repetitive mild TBI
under CAI. The experiment was performed on Wistar rats di-
vided into three groups: Group 1 (Control I) – intact animals;
Group 2 – rats exposed to TBI combined with CAI (Control
II); Group 3 – rats receiving an intraperitoneal water-soluble
form of quercetin (Corvitin) at 100 mg/kg for 14 days follow-
ing TBI with CAI. TBI was induced using a free-weight drop
method (five sessions at 48-hour intervals), while CAI was
modeled by administering 40% ethanol at 12 ml/kg for 14
days. Serum concentrations of neuron-specific enolase (NSE),
calcium-binding protein S100B, tumor necrosis factor-alpha
(TNF-α), interleukins (IL)-6 and IL-10, glucose, insulin, and
lipid profile parameters were measured, and the HOMA-IR
index was calculated. TBI combined with CAI resulted in
marked neuroinflammation and systemic inflammatory re-
sponse, as evidenced by significant elevations in neural tissue
injury markers, increased serum levels of pro-inflammatory
cytokines TNF-α and IL-6, and the development of insulin
resistance and dyslipidemia. Administering quercetin led to
significant reductions in serum NSE (61.9%), S100B (56.3%),
TNF-α (40.8%), and IL-6 (42.0%), as well as a 187.5% in-
crease in IL-10. Furthermore, compared with Group 2 values,
the bioflavonoid reduced glucose by 30.5%, insulin by 68.7%,
very low-density lipoproteins (VLDL) by 42.3%, triglycerides
by 41.9%, and HOMA-IR by 78.4%. These findings indicate
that quercetin exerts pronounced neuroprotective and anti-
inflammatory effects under conditions of TBI combined with
CAI, effectively lowering serum biomarkers of neural tissue
injury and pro-inflammatory cytokines, while enhancing the
anti-inflammatory cytokine IL-10. Moreover, quercetin effi-
ciently restores metabolic homeostasis by normalising glyce-
mia, improving insulin sensitivity, and reducing dyslipidemia.
Keywords:
repetitive mild traumatic brain injury, neural tissue injury biomarkers, inflammation, cytokines, insulin, insulin resistance, quercetin, rats.
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