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Immunotoxins have shown great promise as an alternative treatment for brain malignancies such as gliomas, but their failure to penetrate into the tumor mass remains a major problem. Mesenchymal stem cells exhibit tropism to tumor tissue and may serve as a cellular vehicle for the delivery and local production of antitumor agents. In this study, we used human bone marrow-derived mesenchymal stem cells...
Microsatellite instability (MSI) is known to result from inactivation of mismatch repair genes largely by promoter methylation. However, the methylation usually accumulates time-dependently. To know whether MSI can be acquired later in tumorigenesis, we examined intratumoral heterogeneity of MSI and promoter methylation of hMLH1 after immunohistochemical screening for heterogeneous expression of hMLH1...
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