当前位置： SCI文献检索 > ENVIRONMENTAL RESEARCH期刊下所有文献 > Exposures to fine particulate matter (PM2.5) and ozone above USA standards are associated with auditory brainstem dysmorphology and abnormal auditory brainstem evoked potentials in healthy young dogs.

Exposures to fine particulate matter (PM2.5) and ozone above USA standards are associated with auditory brainstem dysmorphology and abnormal auditory brainstem evoked potentials in healthy young dogs.

Abstract：

BACKGROUND:Delayed central conduction times in the auditory brainstem have been observed in Mexico City (MC) healthy children exposed to fine particulate matter (PM2.5) and ozone (O3) above the current United States Environmental Protection Agency (US-EPA) standards. MC children have α synuclein brainstem accumulation and medial superior olivary complex (MSO) dysmorphology. The present study used a dog model to investigate the potential effects of air pollution on the function and morphology of the auditory brainstem. METHODOLOGY:Twenty-four dogs living in clean air v MC, average age 37.1 ± 26.3 months, underwent brainstem auditory evoked potential (BAEP) measurements. Eight dogs (4 MC, 4 Controls) were analysed for auditory brainstem morphology and histopathology. RESULTS:MC dogs showed ventral cochlear nuclei hypotrophy and MSO dysmorphology with a significant decrease in cell body size, decreased neuronal packing density with regions in the nucleus devoid of neurons and marked gliosis. MC dogs showed significant delayed BAEP absolute wave I, III and V latencies compared to controls. CONCLUSIONS:MC dogs show auditory nuclei dysmorphology and BAEPs consistent with an alteration of the generator sites of the auditory brainstem response waveform. This study puts forward the usefulness of BAEPs to study auditory brainstem neurodegenerative changes associated with air pollution in dogs. Recognition of the role of non-invasive BAEPs in urban dogs is warranted to elucidate novel neurodegenerative pathways link to air pollution and a promising early diagnostic strategy for Alzheimer's Disease.

journal_name

Environ Res

journal_title

Environmental research

authors

Calderón-Garcidueñas L,González-González LO,Kulesza RJ,Fech TM,Pérez-Guillé G,Luna MAJ,Soriano-Rosales RE,Solorio E,Miramontes-Higuera JJ,Gómez-Maqueo Chew A,Bernal-Morúa AF,Mukherjee PS,Torres-Jardón R,Mills PC,Wilson WJ,P

doi

10.1016/j.envres.2017.06.026

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

324-332

eissn

0013-9351

issn

1096-0953

pii

S0013-9351(17)30661-8

journal_volume

158

pub_type

杂志文章

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