Concurrent exposure to light and traffic noise pollution augments behavioral deficits in rats: Protective effect of curcumin
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Date
2024-04
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Abstract
The current study was aimed to explore the effect of light and traffic noise pollution exposure on behavioral and
neurochemical deficits in adult male Wistar rats. We hypothesized that exposure to these pollutants alone or in
combination may cause behavioral deficits in rats. Animals were allocated into different groups and were
exposed to either varying light cycles (150 lx-5 lx, 14:10 h) or traffic noise with sound level 100 dBA for 6 h/day
or both for 28 days. Concurrently, Curcumin (100 mg/kg; per oral; 28 days) was administered in varying light
cycles and noise exposed animal groups to study the preventive effect. After the exposure time, the Morris water
maze test, elevated plus maze test, novel object recognition test, locomotor activity test, and forced swimming
test were conducted. The neurobehavioral results suggested that only combined exposure of light and noise
pollution markedly impaired the learning as well as spatial and reference memory in rats. Furthermore, we found
significant anxiety (less no. of open arm entries in EPM) and depressive-like behavior (increased immobility
time) in light or/and traffic noise pollution exposed group animals in comparison to normal control groups.
Curcumin treatment significantly prevented the behavioral anomalies in combined light and noise exposed rats.
Furthermore, our results revealed augmentation of acetylcholinesterase, oxidative stress markers and interleukin
(IL)-1β in the hippocampal region of noise and light-exposed groups which were markedly ameliorated by
curcumin. In conclusion, our results suggest that curcumin significantly modulates light and noise pollution
exposed behavioral and neurochemical anomalies in rats.