کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8399219 | 1544420 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impaired mitochondrial protein synthesis in head and neck squamous cell carcinoma
ترجمه فارسی عنوان
اختلال سنتز پروتئین میتوکندری در کارسینوم سلول سنگفرشی سر و گردن
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیوفیزیک
چکیده انگلیسی
Human head and neck squamous cell carcinoma (HNSCC) is the sixth most common cancer type worldwide, possibly due to the significant role of alcohol and tobacco use in its development. Underlying most cancers are defects in mitochondrial functions such as energy metabolism and apoptosis. In fact, the mutations in mitochondrial DNA (mtDNA), which encode proteins for oxidative phosphorylation (OXPHOS), have been associated with human head and neck cancers. Here, we investigated the changes in the expression of OXPHOS complexes and the contribution of the defects in mitochondrial translation in the progression of HNSCC. Western blot analyses of the several stage IVA HNSCC primary tumors have shown reduction in the expression of COII and ATP5A of the OXPHOS complexes IV and V subunits, respectively. On the other hand, expression of the majority of the OXPHOS subunits, except complex II SDHB subunit, was impaired in a patient with a stage IV tumor with a regional lymph node. Interestingly, an overall reduction in one of the mitochondrial-encoded subunits of the complex IV, COII, accentuated a possible defect in mitochondrial translation machinery in two of the stage IVA tumors. Evidence provided in this study suggests for the first time that the mitochondrial translation defect(s) could be due to a decrease in the expression of one of the essential mitochondrial ribosomal proteins, MRPL11, in head and neck tumor biopsies. We also observed an acquired mitochondrial translation deficiency in the HN8 cell line derived from a lymph node metastasis but not in the HN22 cells derived from the primary tumor of the same patient. These seminal observations suggest that the mitochondrial translation machinery deserves further investigation for accurate molecular assessment and treatment of HNSCC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mitochondrion - Volume 24, September 2015, Pages 113-121
Journal: Mitochondrion - Volume 24, September 2015, Pages 113-121
نویسندگان
Emine C. Koc, Ebru Haciosmanoglu, Pier Paolo Claudio, Allison Wolf, Luigi Califano, Marco Friscia, Antonio Cortese, Hasan Koc,