{"id":590,"date":"2016-01-08T13:28:21","date_gmt":"2016-01-08T21:28:21","guid":{"rendered":"https:\/\/keck.usc.edu\/news\/scientists-root-out-the-bad-seeds-of-liver-cancer\/"},"modified":"2023-11-19T12:08:53","modified_gmt":"2023-11-19T20:08:53","slug":"scientists-root-out-the-bad-seeds-of-liver-cancer","status":"publish","type":"post","link":"https:\/\/keck.usc.edu\/news\/scientists-root-out-the-bad-seeds-of-liver-cancer\/","title":{"rendered":"Scientists root out the “bad seeds” of liver cancer"},"content":{"rendered":"\n \n \n\n\n\n\n\n\n\n
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Scientists root out the “bad seeds” of liver cancer<\/h1>\n\n\n<\/div>\n \n \n
\n Zen Vuong<\/span>\n \n January 08, 2016<\/span>\n <\/div>\n \n \n
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"There are bad seeds in cancer,\u201d said Keigo Machida, senior study author. "Even though we treat patients with chemotherapy, those bad seeds survive and force relapse. That\u2019s why we would like to target the bad seeds in cancer to eradicate recurrence problems and metastasis.\u201d<\/figcaption>\n <\/figure>\n \n \n \n\n<\/div>\n \n\n <\/div><\/div>\n\r\n\r\n\n\n \n \n\n\n\n\n\n\n\n
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Researchers have found the \u201cbad seeds\u201d of liver cancer and believe they could one day reprogram them to remain responsive to cancer treatment, a new study has found.
\nThe key to disrupting the chemo-resistant stem cells that become liver tumors is to target the stem cell marker NANOG, said senior author Keigo Machida, PhD, associate professor of molecular microbiology and immunology at the Keck School of Medicine of USC.
\nNANOG is scarce in early-stage cancer but abounds in Stage III liver cancer. It promotes the cancer\u2019s spread by rewiring metabolism in the mitochondria \u2014 a cell\u2019s energy factory.
\n\u201cWe identified the Achilles heel in cancer therapy,\u201d Machida said. \u201cThere are bad seeds in cancer. Even though we treat patients with chemotherapy, those bad seeds survive and force relapse. That\u2019s why we would like to target the bad seeds in cancer to eradicate recurrence problems and metastasis, which is when the cancer spreads to other parts of the body.\u201d
\nThe study will be published in the Jan. 12 issue of the journal Cell Metabolism.
\nLiver cancer is on the rise. An estimated 24,550 people died of the disease in 2015, according to the National Cancer Institute. Only 17.2 percent of people diagnosed with liver cancer survive for five years or more.
\nResearchers believe the study is the first scientific article to identify the carcinogenic pathway of stem cell marker NANOG and to posit NANOG as a target that will eliminate patient resistance to Sorafenib, the most common chemotherapy used on liver cancer patients.
\nTo learn how NANOG reprograms stem cells that foster tumor growth, researchers examined proteins, messenger RNA and cell metabolism in the liver, said Vasu Punj, PhD, a co-author and lead bioinformatician at the USC Epigenome Center.
\n\u201cMitochondria-metabolism targeted therapy in cancer is being increasingly recognized as a promising area for future development of new, personalized treatment strategies,\u201d said Punj, associate professor of research medicine. \u201cIf you reduce the cellular response to mitochondrial oxidative phosphorylation-fatty acid oxidation molecules, NANOG will not be able to promote cancer progression. This will enable researchers to develop novel therapeutic strategies for that cancer.\u201d
\nNANOG controls the expression of genes that form \u201cmitochondrial metabolic pathways\u201d \u2014 energy sources \u2014 for stem cells that turn into tumors. It reprograms cells: Instead of using glucose as gasoline, they are ordered to use fatty acid.
\n\u201cIf we shut down this alternative pathway, the liver cancer will become sensitized to chemotherapy again,\u201d Machida said. \u201cIn the future, we might be able to give liver cancer patients a shot that will infuse NANOG-targeted therapy into the blood stream. Wherever blood circulates, we will be able to deliver new instructions to the bad seeds of cancer.\u201d
\nChia-Lin Chen, a doctorate student at USC, was the lead author. Researchers from the Proteome Exploration Laboratory at the California Institute of Technology also contributed to this study, which was supported by the National Institutes of Health, a Research Scholar Grant and the American Cancer Society.<\/p>\n\n\n\n<\/div>\n <\/div>\n\n\n <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":60,"featured_media":591,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[90,57,20,17],"class_list":["post-590","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-release","tag-molecular-microbiology-and-immunology","tag-recent","tag-research","tag-stem-cell"],"acf":[],"yoast_head":"\nScientists root out the "bad seeds" of liver cancer<\/title>\n<meta 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