Reference: Hatanaka H, et al. (2001)
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Abstract
The expression of interleukin 10 (IL-10) is correlated with clinical prognosis in non-small cell lung cancer [NSCLC (H. Hatanaka et al., ANN: ONCOL:, 11: 815--819, 2000)]. However, the effects of IL-10 expression on vascularization in NSCLC are not apparent. We examined the gene expression of IL-10/IL-10 receptor and various angiogenic/angioinhibitory factors in 95 NSCLC samples to determine the correlation between IL-10 production and vascularization. Vascular endothelial growth factor, angiopoietin [Ang (Ang-1 and Ang-2)], thrombospondin, brain-specific angiogenesis inhibitor 1, vascular endothelial growth factor receptors (KDR and flt-1), and Ang receptor (TIE2) gene expression were evaluated by reverse transcription-PCR. The cellular localization of these factors and vascularity in the cancer stroma were examined immunohistochemically. Seventy-eight (82.1%) and 93 (97.9%) of these 95 NSCLCs were positive for IL-10 and IL-10 receptor, respectively. Ang-1, Ang-2, and TIE2 gene expression was seen in 76 (97.4%), 73 (93.6%), and 78 (100%) of 78 IL-10-positive NSCLCs, respectively, and was significantly correlated with IL-10 gene expression (P < 0.0088, <0.0008, and 0.0305, respectively; Fisher's exact method). The localizations of Ang-1, Ang-2, and TIE2 were confirmed within tumor cells immunohistochemically. Vascular number and measurement area were significantly higher in the IL-10-positive NSCLCs (33.500 +/- 9.299/microm(2) and 4.742 +/- 1.287%) as compared with IL-10-negative NSCLCs (10.611 +/- 2.839/microm(2) and 0.718 +/- 0.331%; Mann-Whitney U test, P = 0.0039). The IL-10 expression did not show any significant correlation with the expression of other factors. These results suggested that tumor-produced IL-10 promotes stromal vascularization through expression of Ang-1, Ang-2, and TIE2.
- Reference Type
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Journal Article |
Research Support, Non-U.S. Gov't
- Authors
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Hatanaka H,
Abe Y,
Naruke M,
Tokunaga T,
Oshika Y,
Kawakami T,
Osada H,
Nagata J,
Kamochi J,
Tsuchida T,
... Show all
Kijima H,
Yamazaki H,
Inoue H,
Ueyama Y,
Nakamura M
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