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- W2141137711 abstract "Wnt/frizzled (FZD) cascades play important roles in controlling cell fate, proliferation, migration, tissue architecture and organogenesis during embryonic development and in adult organisms. The potential involvement of this pathway in tumorigenesis has been established in several types of cancers. Frizzled 9 (FZD9) is expressed in brain and its aberrant expression in gastric cancer was observed. However, its association with astrocytomas remains unknown therefore we studied FZD9 expression in astrocytomas of different malignancy. In the present study, FZD9 expression in 25 astrocytomas was investigated using immunohistochemistry with specific antibodies. Further FZD9 expression in native human brain tissue and glioblastoma cell line were analysed using real‐time reverse transcription polymerase chain reaction (RT‐PCR). In human astrocytomas, FZD9 immunoreactivity (IR) was observed in both microvessels and neoplastic cells. The percentage of FZD9 + microvessels in relation to FZD9 + vessels was significantly higher in malignant astrocytomas than in low‐grade astrocytomas and positively correlated with the astrocytoma World Health Organization (WHO) grading ( r = 1, P = 0.04). Furthermore, the FZD9 IR scores positively correlated with astrocytoma WHO grading ( r = 1, P = 0.04) and proliferating activity ( r = 0.77, P < 0.001). Real‐time RT‐PCR data showed that FZD9 expression in human glioblastoma was significant higher than in normal brain ( P < 0.05) but FZD9 expression was only slightly induced in cobalt chloride‐treated human glioblastoma T98G cells compared with untreated cells ( P > 0.05). FZD9 is upregulated in astrocytomas, suggesting that FZD9 could be important in the tumorigenesis of human astrocytomas." @default.
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- W2141137711 date "2006-11-02" @default.
- W2141137711 modified "2023-10-16" @default.
- W2141137711 title "Upregulation of frizzled 9 in astrocytomas" @default.
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- W2141137711 doi "https://doi.org/10.1111/j.1365-2990.2006.00770.x" @default.
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