05.08.2013 Views

Validazione di un algoritmo per la valutazione dei rischi da ...

Validazione di un algoritmo per la valutazione dei rischi da ...

Validazione di un algoritmo per la valutazione dei rischi da ...

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

G Ital Med Lav Erg 2007; 29:3 465<br />

www.gimle.fsm.it<br />

BIBLIOGRAFIA<br />

1) Powers KW, Brown SC, Krishna VB, et al. Research strategies for<br />

safety evaluation of nanomaterials, part IV: characterization of nanoscale<br />

particles for toxicological evaluation. Toxicol Sci 2006;<br />

90:296-303.<br />

2) Franco G. La me<strong>di</strong>cina del <strong>la</strong>voro basata sulle prove <strong>di</strong> efficacia: <strong>da</strong>l<strong>la</strong><br />

teoria al<strong>la</strong> pratica. G Ital Med Lav Erg 2006; 28(Suppl):170-175.<br />

3) Oberdörster G, Oberdörster E, Oberdörster J. Nanotoxicology: an<br />

emerging <strong>di</strong>scipline evolving from stu<strong>di</strong>es of ultrafine particles. Environ<br />

Health Perspect 2005; 113:823-839.<br />

4) Donaldson K, Aitken R, Tran L, et al. Carbon Nanotubes: A review<br />

of their pro<strong>per</strong>ties in re<strong>la</strong>tion to pulmonary toxicology and workp<strong>la</strong>ce<br />

safety. Toxicol Science 2006; 92:5-22.<br />

5) Lam CW, James JT, McCluskey R, H<strong>un</strong>ter RL. Pulmonary Toxicity<br />

of Single Walled Carbon Nanotubes in Mice 7 and 90 Days after Intratracheal<br />

Instil<strong>la</strong>tion. Toxicol Sci 2004; 77:126-134.<br />

6) Jia G, Wang H, Yan L, et al. Cytotoxicity of carbon nanomaterials:<br />

single-wall nanotube, multi-wall nanotube, and fullerene. Environ<br />

Sci Technol 2005; 39:1378-1383.<br />

7) Gojova A, Guo B, Kota RS, et al. Induction of inf<strong>la</strong>mmation in vascu<strong>la</strong>r<br />

endothelial cells by metal oxide nanoparticles: effect of particle<br />

composition. Environ Health Perspect 2007; 115:403-409.<br />

8) Oberdörster G. Significance of particle parameters in the evaluation<br />

of exposure-dose response re<strong>la</strong>tionships of inhaled particles. Inhal<br />

Toxicol 1996; 8:73-89.<br />

9) Warheit DB, Laurence BR, Reed KL, et al. Comparative pulmonary<br />

toxicity assessment of single-wall carbon nanotubes in rats. Toxicol<br />

Sciences 2004; 77:117-125.<br />

10) Warheit DB, Webb TR, Sayes CM, et al. Pulmonary instil<strong>la</strong>tion stu<strong>di</strong>es<br />

with nanoscale TiO 2 rods and dots in rats: toxicity is not dependent<br />

upon particle size and surface area. Toxicol Sci 2006, 91:227-<br />

236.<br />

11) Cheng Y-S, Smith SM, Yeh H-C, et al. Deposition of ultrafine aerosols<br />

and thoron progeny in replicas of nasal airways of yo<strong>un</strong>g children.<br />

Aerosol Sci Technol 1995; 23:541-552.<br />

12) Cheng K-H, Cheng Y-S, Yeh H-C, et al. In vivo measurements of nasal<br />

airway <strong>di</strong>mensions and ultrafine aerosol deposition in the human<br />

nasal and oral airways. J Aerosol Sci 1996; 27:785-801.<br />

13) Brown JS, Zeman KL, Bennett WD. Ultrafine particle deposition and<br />

clearance in the healthy and obstructed l<strong>un</strong>g. Am J Respir Crit Care<br />

Med 2002; 166:1240-1247.<br />

14) Jaques PA, Kim CS. Measurement of total l<strong>un</strong>g deposition of inhaled<br />

ultrafine particles in healthy men and women. Inha<strong>la</strong>tion Toxicol<br />

2000; 12:715-731.<br />

15) Frampton MW. Systemic and car<strong>di</strong>ovascu<strong>la</strong>r effects of airway injury<br />

and inf<strong>la</strong>mmation: ultrafine particle exposure in humans. Environ<br />

Health Perspect 2001; 109:529-532.<br />

16) Chalupa DC, Morrow PE, Oberdorster G, et al. Ultrafine particle deposition<br />

in subjects with asthma. Environ Health Perspect 2004; 112:<br />

879-882.<br />

COM-05<br />

INTERAZIONE TRA NANOTUBI DI CARBONIO E CONTROLLO<br />

CARDIOVASCOLARE DEL SISTEMA NERVOSO AUTONOMO:<br />

PRESENTAZIONE DI UN MODELLO SPERIMENTALE ANIMALE<br />

E RISULTATI PRELIMINARI<br />

L. Coppeta, J. Legramante*, A Ga<strong>la</strong>nte*, A. Bergamaschi^,<br />

E. Bergamaschi+, A. Magrini, A. Pietroiusti.<br />

Università Tor Vergata, Roma- Cattedra <strong>di</strong> Me<strong>di</strong>cina del Lavoro<br />

*Università Tor Vergata, Roma- Dipartimento <strong>di</strong> Me<strong>di</strong>cina Interna<br />

^Università Cattolica del Sacro Cuore, Roma- Istituto <strong>di</strong> Me<strong>di</strong>cina del<br />

Lavoro<br />

+Università <strong>di</strong> Parma, Cattedra <strong>di</strong> Me<strong>di</strong>cina del Lavoro<br />

Corrispondenza: Antonio Pietroiusti, Università Tor Vergata, Via<br />

Montpellier 1, 00161, Roma, Tel +390620902204, Fax +390620902212,<br />

e-mail: pietroiusti@med.<strong>un</strong>iroma2.it<br />

RIASSUNTO. Alterazioni del<strong>la</strong> rego<strong>la</strong>zione autonomica car<strong>di</strong>ovasco<strong>la</strong>re<br />

potrebbero me<strong>di</strong>are l’associazione tra esposizione a nanotubi <strong>di</strong><br />

carbonio a parete singo<strong>la</strong> (SWCNT) ed eventi car<strong>di</strong>ovasco<strong>la</strong>ri. In questo<br />

stu<strong>di</strong>o sono stati somministrati 400 µg <strong>di</strong> SWCNT in 400 µl <strong>di</strong> soluzione<br />

salina tamponata (PBS) o 400 µl <strong>di</strong> PBS a 7 ratti Wystar-Kyoto del peso<br />

<strong>di</strong> 400 g con <strong>un</strong> trasmettitore impiantato in aorta addominale <strong>per</strong> <strong>la</strong> registrazione<br />

continua del segnale pressorio. Sono state eseguite registrazioni<br />

<strong>di</strong> base, a 24 ore e a 2 settimane <strong>da</strong>ll’instil<strong>la</strong>zione intratracheale, che<br />

hanno consentito <strong>di</strong> valutare <strong>la</strong> presenza <strong>di</strong> sequenze baroriflesse (variazione<br />

consensuale del<strong>la</strong> pressione sistolica-PS- e dell’intervallo ECG R-<br />

R9 e non baroriflesse (variazioni opposte <strong>dei</strong> due parametri). Lo “slope”<br />

me<strong>di</strong>o in<strong>di</strong>viduale delle sequenze è stato considerato quale in<strong>di</strong>ce del<strong>la</strong><br />

sensibilità baroriflessa e non baroriflessa <strong>per</strong> <strong>un</strong> <strong>da</strong>to <strong>per</strong>iodo. Questo parametro<br />

ha mostrato <strong>un</strong> incremento a 24 ore del 100% nei controlli (<strong>da</strong><br />

4.6 a 9.2 msec/mmHg), mentre è risultato piatto nei casi (<strong>da</strong> 5.1 a 6.1<br />

msec/mmHg) (p

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!