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The role of nodose ganglia in the regulation of cardiovascular function following pulmonary exposure to ultrafine titanium dioxide.

Authors
Kan-H; Wu-Z; Lin-Y-C; Chen-T-H; Cumpston-JL; Kashon-ML; Leonard-S; Munson-AE; Castranova-V
Source
Nanotoxicology 2014 Jun; 8(4):447-454
NIOSHTIC No.
20043088
Abstract
The inhalation of nanosized air pollutant particles is a recognised risk factor for cardiovascular disease; however, the link between occupational exposure to engineered nanoparticles and adverse cardiovascular events remains unclear. In the present study, the authors demonstrated that pulmonary exposure of rats to ultrafine titanium dioxide (UFTiO2) significantly increased heart rate and depressed diastolic function of the heart in response to isoproterenol. Moreover, pulmonary inhalation of UFTiO2 elevated mean and diastolic blood pressure in response to norepinephrine. Pretreatment of the rats ip with the transient receptor potential (TRP) channel blocker ruthenium red inhibited substance P synthesis in nodose ganglia and associated functional and biological changes in the cardiovascular system. In conclusion, the effects of pulmonary inhalation of UFTiO2 on cardiovascular function are most likely triggered by a lung-nodose ganglia-regulated pathway via the activation of TRP channels in the lung.
Keywords
Nanotechnology; Inhalation-studies; Dioxides; Exposure-assessment; Laboratory-animals; Laboratory-testing; Cardiopulmonary-function; Cardiopulmonary-system-disorders; Cardiovascular-function; Cardiovascular-system-disorders; Pulmonary-function; Pulmonary-system-disorders; Heart-rate; Blood-pressure; Lung; Author Keywords: nanoparticles; neural pathways; cardiovascular system; inhalation study
Contact
Hong Kan, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, PPRB, 1095 Willowdale Road, Morgantown, WV 26505, USA
CAS No.
13463-67-7; 7683-59-2
Publication Date
20140601
Document Type
Journal Article
Email Address
hvn4@cdc.gov
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M082013
Issue of Publication
4
ISSN
1743-5390
NIOSH Division
HELD
Priority Area
Construction
Source Name
Nanotoxicology
State
WV
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