Antioxidant-Effective Quercetin Through Modulation of Brain Interleukin-13 Mitigates Autistic-Like Behaviors in the...

Area of Science:

• Neuroscience
• Biochemistry
• Pharmacology

Background:

• Oxidative stress and neuroinflammation, driven by reactive oxygen species, contribute to autism spectrum disorder (ASD) pathophysiology.
• This leads to impaired neuronal function, cell loss, and behavioral deficits, creating a cycle of cellular damage.
• Microglial activation under oxidative stress releases inflammatory mediators, worsening neuronal damage.

Purpose of the Study:

• To investigate the potential of quercetin, a dietary antioxidant, in ameliorating ASD-associated oxidative stress and neuroinflammation.
• To assess quercetin's effects on learning, social skills, and neuronal preservation in an established autism rat model.
• To determine if quercetin's antioxidant and anti-inflammatory properties can mitigate ASD-like symptoms.

Main Methods:

• An autism model was induced in rats using propionic acid (PPA) injection.
• Rats were divided into control, PPA+saline, and PPA+quercetin groups for 15-day treatment.
• Histological, biochemical (oxidative stress markers, inflammatory cytokines), and behavioral tests were conducted.

Main Results:

• PPA exposure significantly increased oxidative stress (malondialdehyde) and inflammation (TNF-α, IL-1β) in rat brains.
• Quercetin treatment significantly reduced these oxidative stress and inflammatory markers.
• Quercetin administration preserved Purkinje cells and neuronal populations, and improved social behavior and learning in PPA-treated rats.

Conclusions:

• Quercetin demonstrates significant neuroprotective effects by targeting oxidative stress and neuroinflammation.
• These effects prevent neuronal cell loss and alleviate behavioral deficits associated with autism spectrum disorders.
• Quercetin holds promise as a therapeutic agent for managing ASD-related pathophysiology.