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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hirsch, L.R. West, J.L. Stafford, R.J. Bankson, J.A. Sershen, S.R. Price, R.E. Hazle, J.D. Halas, N.J. |
| Copyright Year | 2003 |
| Description | Author affiliation: Dept. of Bioeng., Rice Univ., Houston, TX, USA (Hirsch, L.R.; West, J.L.) |
| Abstract | A novel photothermal therapy of neoplastic tissue is described. The use of near infrared (NIR) absorbing nanoshells permits targeted photothermal ablation of tumor tissue via NIR heating of nanoshell-laden tumors using an extracorporeal near infrared source. Human breast carcinoma cells incubated with nanoshells in vitro were found to undergo photothermally induced morbitity upon exposure to NIR light (820 nm, 44 W/cm/sup 2/) as determined using a fluorescent viability stain. Cells without nanoshells displayed no loss in viability after the same periods and conditions of near infrared illumination. Likewise, in vivo studies under MR guidance revealed that exposure to low doses of near infrared light (820 nm, 4 W/cm/sup 2/) in solid tumors treated with metal nanoshells reached average temperatures capable of inducing irreversible tissue damage (/spl Delta/T=37.4/spl plusmn/6.6/spl deg/C) within 4-6 minutes. Controls treated without nanoshells demonstrated significantly less average temperatures upon exposure to near infrared light (/spl Delta/T<10/spl deg/C). These findings demonstrated good correlation with histological findings. Tissues heated above the thermal damage threshold displayed coagulation, cell shrinkage, and loss of nuclear staining-indicators of irreversible thermal damage. Control tissues did not display these indicators and appeared undamaged. |
| Sponsorship | Whitaker Found |
| Starting Page | 1230 |
| Ending Page | 1231 |
| File Size | 147107 |
| Page Count | 2 |
| File Format | |
| ISBN | 0780377893 |
| ISSN | 1094687X |
| DOI | 10.1109/IEMBS.2003.1279474 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-09-17 |
| Publisher Place | Mexico |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Medical treatment Breast neoplasms Infrared heating Humans In vitro Fluorescence Lighting In vivo Solids Temperature |
| Content Type | Text |
| Resource Type | Article |
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