The Air We Breathe: Air Pollution as a Prevalent Proinflammatory Stimulus Contributing to Neurodegeneration

被引:55
作者
Jankowska-Kieltyka, Monika [1 ]
Roman, Adam [1 ]
Nalepa, Irena [1 ]
机构
[1] Polish Acad Sci, Maj Inst Pharmacol, Dept Brain Biochem, Krakow, Poland
关键词
particulate matter; neurotoxicity; neuroinflammation; oxidative stress; neurodegeneration; autoimmunity; CENTRAL-NERVOUS-SYSTEM; BLOOD-BRAIN-BARRIER; PARTICULATE MATTER EXPOSURE; MULTIPLE-SCLEROSIS; OXIDATIVE STRESS; PARKINSONS-DISEASE; ALZHEIMERS-DISEASE; ALPHA-SYNUCLEIN; DIESEL EXHAUST; COGNITIVE FUNCTION;
D O I
10.3389/fncel.2021.647643
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Air pollution is regarded as an important risk factor for many diseases that affect a large proportion of the human population. To date, accumulating reports have noted that particulate matter (PM) is closely associated with the course of cardiopulmonary disorders. As the incidence of Alzheimer's disease (AD), Parkinson's disease (PD), and autoimmune disorders have risen and as the world's population is aging, there is an increasing interest in environmental health hazards, mainly air pollution, which has been slightly overlooked as one of many plausible detrimental stimuli contributing to neurodegenerative disease onset and progression. Epidemiological studies have indicated a noticeable association between exposure to PM and neurotoxicity, which has been gradually confirmed by in vivo and in vitro studies. After entering the body directly through the olfactory epithelium or indirectly by passing through the respiratory system into the circulatory system, air pollutants are subsequently able to reach the brain. Among the potential mechanisms underlying particle-induced detrimental effects in the periphery and the central nervous system (CNS), increased oxidative stress, inflammation, mitochondrial dysfunction, microglial activation, disturbance of protein homeostasis, and ultimately, neuronal death are often postulated and concomitantly coincide with the main pathomechanisms of neurodegenerative processes. Other complementary mechanisms by which PM could mediate neurotoxicity and contribute to neurodegeneration remain unconfirmed. Furthermore, the question of how strong and proven air pollutants are as substantial adverse factors for neurodegenerative disease etiologies remains unsolved. This review highlights research advances regarding the issue of PM with an emphasis on neurodegeneration markers, symptoms, and mechanisms by which air pollutants could mediate damage in the CNS. Poor air quality and insufficient knowledge regarding its toxicity justify conducting scientific investigations to understand the biological impact of PM in the context of various types of neurodegeneration.
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页数:19
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