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Cited by 282

The DOI matches its Crossref record; 39 of the 39 references it cites were found in a registry or an index.

Ionizing Radiation Enhances Matrix Metalloproteinase-2 Secretion and Invasion of Glioma Cells through Src/Epidermal Growth Factor Receptor–Mediated p38/Akt and Phosphatidylinositol 3-Kinase/Akt Signaling Pathways

Park, Chang-Min, Park, Myung-Jin, Kwak, Hee-Jin, Lee, Hyung-Chahn, Kim, Mi-Suk, Lee, Seung-Hoon, Park, In-Chul, Rhee, Chang Hun, Hong, Seok-Il·2006·Cancer Research

Abstract

Glioblastoma is a severe type of primary brain tumor, and its highly invasive character is considered to be a major therapeutic obstacle. Several recent studies have reported that ionizing radiation (IR) enhances the invasion of tumor cells, but the mechanisms for this effect are not well understood. In this study, we investigated the possible signaling mechanisms involved in IR-induced invasion of glioma cells. IR increased the matrix metalloproteinase (MMP)-2 promoter activity, mRNA transcription, and protein secretion along with the invasiveness of glioma cells lacking functional PTEN (U87, U251, U373, and C6) but not those harboring wild-type (WT)-PTEN (LN18 and LN428). IR activated phosphatidylinositol 3-kinase (PI3K), Akt, and mammalian target of rapamycin, and blockade of these kinases by specific inhibitors (LY294002, Akt inhibitor IV, and rapamycin, respectively) and transfection of dominant-negative (DN) mutants (DN-p85 and DN-Akt) or WT-PTEN suppressed the IR-induced MMP-2 secretion in U251 and U373 cells. In addition, inhibitors of epidermal growth factor receptor (EGFR; AG490 and AG1478), Src (PP2), and p38 (SB203580), EGFR neutralizing antibody, and transfection of DN-Src and DN-p38 significantly blocked IR-induced Akt phosphorylation and MMP-2 secretion. IR-induced activation of EGFR was suppressed by PP2, whereas LY294002 and SB203580 did not affect the activations of p38 and PI3K, respectively. Finally, these kinase inhibitors significantly reduced the IR-induced invasiveness of these cells on Matrigel. Taken together, our findings suggest that IR induces Src-dependent EGFR activation, which triggers the p38/Akt and PI3K/Akt signaling pathways, leading to increased MMP-2 expression and heightened invasiveness of PTEN mutant glioma cells. (Cancer Res 2006; 66(17): 8511-9)

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Metadata

Authors
Park, C.-M., Park, M.-J., Kwak, H.-J., Lee, H.-C., Kim, M.-S., Lee, S.-H., Park, I.-C., Rhee, C. H., & Hong, S.-I.
Venue
Cancer Research
Published
2006-09-01
Volume
66
Issue
17
Pages
8511-8519
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2003736915
Cited by
282
References
39
FWCI
5.39
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Ionizing Radiation Enhances Matrix Metalloproteinase-2 Secretion and Invasion of Glioma Cells through Src/Epidermal Growth Factor Receptor–Mediated p38/Akt and Phosphatidylinositol 3-Kinase/Akt Signaling Pathways. https://app.cochat.ai/papers/10.1158/0008-5472.can-05-4340
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Park, C.-M., Park, M.-J., Kwak, H.-J., Lee, H.-C., Kim, M.-S., Lee, S.-H., Park, I.-C., Rhee, C. H., & Hong, S.-I. (2006). Ionizing Radiation Enhances Matrix Metalloproteinase-2 Secretion and Invasion of Glioma Cells through Src/Epidermal Growth Factor Receptor–Mediated p38/Akt and Phosphatidylinositol 3-Kinase/Akt Signaling Pathways. Cancer Research. https://doi.org/10.1158/0008-5472.can-05-4340

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