A novel Myc-target gene, mimitin, that is involved in cell proliferation of esophageal squamous cell carcinoma.
نویسندگان
چکیده
Myc is a ubiquitous mediator of cell proliferation that transactivates the expression of various genes through E-box sites. Here we report a novel gene, mimitin (Myc-induced mitochondrial protein), that encodes a mitochondrial protein with a molecular mass of 20 kDa. We demonstrated that the transcription of mimitin is directly stimulated by c-Myc. To investigate the role of Mimitin, its expression was suppressed by the RNA interference (RNAi) technique. Whereas specific inhibition of mimitin expression did not affect cell proliferation in human cervical carcinoma, colon adenocarcinoma, and hepatocarcinoma cell lines, it did suppress cell proliferation in human glioblastoma, esophageal squamous cell carcinoma (ESCC), and embryonic lung fibroblastic cells, with the greatest suppression efficiency in ESCC cells. To investigate whether mimitin is related to tumorigenesis in ESCC in vivo, the expression of Mimitin protein in ESCC tissues was studied. Mimitin was highly expressed in 80% (28 of 35) of ESCC tumors, suggesting that high expression of Mimitin is a characteristic feature of ESCC. The expression level of Mimitin was found to be correlated with that of c-Myc and cell proliferation, but not with the histopathological grade, stage of cancer, or age of patients. Taken together, these results suggest that the novel gene mimitin is a direct transcriptional target of c-Myc, and is involved in Myc-dependent cell proliferation at least in ESCC cells.
منابع مشابه
The Level of Mesenchymal-Epithelial Transition Autophosphorylation is Correlated with Esophageal Squamous Cell Carcinoma Migration
Background: The MET receptor is a critical member of cancer-associated RTKs and plays an important role in different biological activities, including differentiation, migration, and cell proliferation. Methods: In this study, novel MET inhibitors were introduced and applied on esophageal squamous carcinoma cell line KYSE-30, and the level of proliferation and migration, as well as the activated...
متن کاملIdentification of p53 Gene Mutations among Iranian Patients Involved with Esophageal Squamous Cell Carcinoma: the Efficiency of the Two Different Methods
متن کامل
Analysis of SEPT9 Gene Promoter Methylation Status in Esophageal Squamous Cell Carcinoma
Introduction: The changes in the level of SEPT9 gene promoter methylation can contribute to the formation of esophageal squamous cell carcinoma. The aim of this study was to evaluate the level of changes in the level of SEPT9 gene promoter methylation in the esophageal squamous cell carcinoma. Methods: In the present case-control study, we collected 75 paraffin blocks of esophageal cancer tiss...
متن کاملTELOMERASEACTIVITYIN IRANIAN PATIENTS WITH ESOPHAGEAL SQUAMOUS CELL CARCINOMA
Telomerase activation is one of the main pathways to immortalize cancer cells. In many kinds of cancer cells, this special reverse transcriptase stabilizes and elongates telomeres and prevents telomere erosion that naturally occurs in every cell division. Esophageal cancer is the fifth most frequent cause of cancer death worldwide, and is highly associated with alcohol, smoking, cultural ha...
متن کاملژنتیک مولکولی و ژن درمانی در سرطان مری: مقاله مروری
Background: With approximately 386,000 deaths per year, esophageal cancer is the 6th most common cause of death due to cancer in the world. This cancer, like any other cancer, is the outcome of genetic alterations or environmental factors such as tobacco smoke and gastro-esophageal reflux. Tobacco smoking is a major etiologic factor for esophageal squamous cell carcinoma in western countries, a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- The Journal of biological chemistry
دوره 280 20 شماره
صفحات -
تاریخ انتشار 2005