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- W3192543741 abstract "Abstract Objective MuT Homolog1 (MTH1) is an enzyme involved in DNA repair in normal cells and is often up- regulated in cancer cells. The enzyme catalyses the hydrolysis of oxidised dNTPs, to prevent their incorporation into DNA or RNA, resulting in mutations or cell damage/death. Cancer cells can have a high concentration of ROS, due to defective redox regulation. This results in the damage of DNA and oxidises free dNTPS, which in turn leads to mutations in DNA replication or cell death. Identifying MTH1 in brain metastases could present a target for treatment with MTH1-Inhibitors. Methods The quantification of MTH1 expression was shown using Western Blot analysis. 16 tumours were obtained during neurosurgery, 8 metastatic and 8 recurrent tumours of the same patient, and immediately frozen using liquid nitrogen. The proteins were extracted using RIPA lysis buffer. Western Blot was performed and detection followed via peroxidase linked secondary antibodies. Results MTH1 expression was shown to be up-regulated in brain metastases (1,442+/-0,6374) versus normal brain tissue (0,4133+/-0,277). However, in the recurrent tumour of the brain metastases, MTH1 was not expressed in a significantly higher amount compared the controll tissue and less than in the brain metastases (0,6941+/-0,4146). Conclusion The high expression of MTH1 in cerebral metastases is not uncommon for many cancers and thus presents a therapeutic target for MTH1-inhibitors, provided these are able to cross the blood brain barrier. Comparison to the primary melanoma tumour would be useful in showing significant differences of the metastases. Lower levels of MTH1 in recurrent brain metastases may suggest dedifferentiation from the original metastases. It may present a target for specific treatment of brain metastases of melanoma." @default.
- W3192543741 created "2021-08-16" @default.
- W3192543741 creator A5041839079 @default.
- W3192543741 date "2021-08-01" @default.
- W3192543741 modified "2023-09-27" @default.
- W3192543741 title "BSCI-13. MTH1 expression is upregulated in brain metastases of malignant melanoma" @default.
- W3192543741 doi "https://doi.org/10.1093/noajnl/vdab071.012" @default.
- W3192543741 hasPublicationYear "2021" @default.
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