Next Article in Journal
Asymmetric Dimethylarginine Plasma Levels and Endothelial Function in Newly Diagnosed Type 2 Diabetic Patients
Next Article in Special Issue
Photodegradable Polyesters for Triggered Release
Previous Article in Journal
Quantum Dots-Based Immunofluorescent Imaging of Stromal Fibroblasts Caveolin-1 and Light Chain 3B Expression and Identification of Their Clinical Significance in Human Gastric Cancer
Previous Article in Special Issue
Cytotoxicity of Phenol Red in Toxicity Assays for Carbon Nanoparticles
Open AccessArticle

Impairment of Coronary Arteriolar Endothelium-Dependent Dilation after Multi-Walled Carbon Nanotube Inhalation: A Time-Course Study

1
Center for Cardiovascular and Respiratory Sciences, West Virginia University School of Medicine, Morgantown, WV 26506, USA
2
Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV 26506, USA
3
Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
4
Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
5
Department of Neurobiology and Anatomy, West Virginia University School of Medicine, Morgantown, WV 26505, USA
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2012, 13(11), 13781-13803; https://doi.org/10.3390/ijms131113781
Received: 17 September 2012 / Revised: 12 October 2012 / Accepted: 16 October 2012 / Published: 24 October 2012
(This article belongs to the Special Issue Bioactive Nanoparticles 2012)
Engineered nanomaterials have been developed for widespread applications due to many highly unique and desirable characteristics. The purpose of this study was to assess pulmonary inflammation and subepicardial arteriolar reactivity in response to multi-walled carbon nanotube (MWCNT) inhalation and evaluate the time course of vascular alterations. Rats were exposed to MWCNT aerosols producing pulmonary deposition. Pulmonary inflammation via bronchoalveolar lavage and MWCNT translocation from the lungs to systemic organs was evident 24 h post-inhalation. Coronary arterioles were evaluated 24–168 h post-exposure to determine microvascular response to changes in transmural pressure, endothelium-dependent and -independent reactivity. Myogenic responsiveness, vascular smooth muscle reactivity to nitric oxide, and α-adrenergic responses all remained intact. However, a severe impact on endothelium-dependent dilation was observed within 24 h after MWCNT inhalation, a condition which improved, but did not fully return to control after 168 h. In conclusion, results indicate that MWCNT inhalation not only leads to pulmonary inflammation and cytotoxicity at low lung burdens, but also a low level of particle translocation to systemic organs. MWCNT inhalation also leads to impairments of endothelium-dependent dilation in the coronary microcirculation within 24 h, a condition which does not fully dissipate within 168 h. The innovations within the field of nanotechnology, while exciting and novel, can only reach their full potential if toxicity is first properly assessed. View Full-Text
Keywords: microcirculation; coronary; arteriole; nanotoxicology; multi-walled carbon nanotube; engineered nanomaterial; translocation microcirculation; coronary; arteriole; nanotoxicology; multi-walled carbon nanotube; engineered nanomaterial; translocation
MDPI and ACS Style

Stapleton, P.A.; Minarchick, V.C.; Cumpston, A.M.; McKinney, W.; Chen, B.T.; Sager, T.M.; Frazer, D.G.; Mercer, R.R.; Scabilloni, J.; Andrew, M.E.; Castranova, V.; Nurkiewicz, T.R. Impairment of Coronary Arteriolar Endothelium-Dependent Dilation after Multi-Walled Carbon Nanotube Inhalation: A Time-Course Study. Int. J. Mol. Sci. 2012, 13, 13781-13803.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop