Abstract:
:Radiation therapy (RT) for brain tumors is associated with neurocognitive toxicity which may be a result of damage to neural progenitor cells (NPCs). We present a novel technique to limit the radiation dose to NPC without compromising tumor coverage. A study was performed in mice to examine the rationale and another was conducted in humans to determine its feasibility. C57BL/6 mice received localized radiation using a dedicated animal irradiation system with on-board CT imaging with either: (1) Radiation which spared NPC containing regions; (2) Radiation which did not spare these niches; or (3) Sham irradiation. Mice were sacrificed 24 h later and the brains were processed for immunohistochemical Ki-67 staining. For the human component of the study, 33 patients with primary brain tumors were evaluated. Two intensity modulated radiotherapy (IMRT) plans were retrospectively compared: a standard clinical plan and a plan which spares NPC regions while maintaining the same dose coverage of the tumor. The change in radiation dose to the contralateral NPC-containing regions was recorded. In the mouse model, non-NPC-sparing radiation treatment resulted in a significant decrease in the number of Ki67(+) cells in dentate gyrus (DG) (P = 0.008) and subventricular zone (SVZ) (P = 0.005) compared to NPC-sparing radiation treatment. In NPC-sparing clinical plans, NPC regions received significantly lower radiation dose with no clinically relevant changes in tumor coverage. This novel radiation technique should significantly reduce radiation doses to NPC containing regions of the brain which may reduce neurocognitive deficits following RT for brain tumors.
journal_name
J Neurooncoljournal_title
Journal of neuro-oncologyauthors
Redmond KJ,Achanta P,Grossman SA,Armour M,Reyes J,Kleinberg L,Tryggestad E,Quinones-Hinojosa A,Ford ECdoi
10.1007/s11060-011-0530-8subject
Has Abstractpub_date
2011-09-01 00:00:00pages
579-87issue
2eissn
0167-594Xissn
1573-7373journal_volume
104pub_type
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journal_title:Journal of neuro-oncology
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journal_title:Journal of neuro-oncology
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doi:10.1007/s11060-019-03224-w
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pub_type: 已发布勘误
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journal_title:Journal of neuro-oncology
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pub_type: 临床试验,杂志文章
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
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journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章,多中心研究
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