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• W1966798186 abstract "A tumor-specific microenvironment is characterized by hypoxia, in which oxygen tension is considerably lower than in normal tissues. The hypoxic status of various solid tumors has been attributed as an indicator of adverse prognosis due to tumor progression toward a more malignant phenotype with increased metastatic potential and resistance to treatment. Various exogenous and endogenous markers for hypoxia are currently available and studied in relation to each other, tumor architecture, and tumor microenvironment. Over the last few decades, various methods have been suggested to assess the level of oxygenation in solid tumors. Among them, nitroimidazole compounds have provided promising information on tumor hypoxia. To quantify the extent of hypoxia requires that nitroimidazole binding be primarily dependent on oxygen concentration as well as nitroreductase levels in the tumor cells. Furthermore, recent progress in molecular biology has highlighted a transcription factor, hypoxia-inducible factor (HIF)-1, whose activity is induced by hypoxia. HIF-1 plays a central role in malignant progression by inducing the expression of various genes, whose functions are strongly associated with malignant alteration of the entire tumor. The cellular changes induced by HIF-1 are extremely important therapeutic targets of cancer therapy, particularly in the therapy against refractory cancers. In this review, we will discuss the significance of pimonidazole and HIF-1 as exogenous and endogenous hypoxia markers, respectively, as well as their evaluation and imaging of tumor hypoxia." @default.
• W1966798186 created "2016-06-24" @default.
• W1966798186 creator A5035904442 @default.
• W1966798186 creator A5047321481 @default.
• W1966798186 date "2009-07-10" @default.
• W1966798186 modified "2023-10-17" @default.
• W1966798186 title "Significance of nitroimidazole compounds and hypoxia-inducible factor-1 for imaging tumor hypoxia" @default.
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• W1966798186 doi "https://doi.org/10.1111/j.1349-7006.2009.01195.x" @default.
• W1966798186 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19459851" @default.
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