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The μ-opioid receptor (MOR) promotes tumor initiation in hepatocellular carcinoma.

08:00 EDT 27th March 2019 | BioPortfolio

Summary of "The μ-opioid receptor (MOR) promotes tumor initiation in hepatocellular carcinoma."

Hepatocellular carcinoma (HCC) is the most prevalent subtype of liver cancer. Anesthetic regimens possibly influence cancer development. Exploration of novel, effective targets for liver cancer is the current hotspot in cancer treatment. A previous study conducted by us has demonstrated that enhanced expression of the μ-opioid receptor (MOR) promotes cell proliferation, adhesion, migration, and tumorigenesis. The current study investigates whether MOR regulates self-renewal of hepatocellular carcinoma stem cells (HCSCs). We utilize cell function assays, siRNA, shRNA, flow cytometry sorting, and other molecular biology techniques for this purpose. The results indicate that MOR expression is positively related to hepatocarcinoma progression. Silencing MOR greatly reduce HCC-related tumorigenesis both in vitro and in vivo and significantly extend the survival of tumor-bearing mice. Moreover, MOR silencing will greatly reduce colony formation by HCC cells, indicating down-regulation of cancer initiation. In conclusion, these results establish that MOR can be a novel and reliable HCSC marker and a potential therapeutic target against HCC via MOR-NFAT signaling.

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This article was published in the following journal.

Name: Cancer letters
ISSN: 1872-7980
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Medical and Biotech [MESH] Definitions

The founding member of the EPH FAMILY RECEPTORS. It was first cloned from an erythropoietin-producing human hepatocellular carcinoma cell line and is highly conserved among many mammalian species. Overproduction of the EphA1 receptor is associated with tumors and tumor cells of epithelial origin. It is also expressed at high levels in LIVER; LUNG; and KIDNEY; which is in contrast to many other members of the Eph receptor that are found primarily in tissues of the nervous system.

A eukaryotic initiation factor that interacts with the 40S initiation complex and promotes the hydrolysis of the bound GTP. The hydrolysis of GTP causes the release of EUKARYOTIC INITIATION FACTOR-2 and EUKARYOTIC INITIATION FACTOR-3 from the 40S subunit and the subsequent joining of the 60S ribosomal subunit to the 40S complex to form the functional 80S initiation complex

A carcinoma discovered by Dr. Margaret R. Lewis of the Wistar Institute in 1951. This tumor originated spontaneously as a carcinoma of the lung of a C57BL mouse. The tumor does not appear to be grossly hemorrhagic and the majority of the tumor tissue is a semifirm homogeneous mass. (From Cancer Chemother Rep 2 1972 Nov;(3)1:325) It is also called 3LL and LLC and is used as a transplantable malignancy.

A transplantable, poorly differentiated malignant tumor which appeared originally as a spontaneous breast carcinoma in a mouse. It grows in both solid and ascitic forms.

A large family of receptor protein-tyrosine kinases that are structurally-related. The name of this family of proteins derives from original protein Eph (now called the EPHA1 RECEPTOR), which was named after the cell line it was first discovered in: Erythropoietin-Producing human Hepatocellular carcinoma cell line. Members of this family have been implicated in regulation of cell-cell interactions involved in nervous system patterning and development.

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