Abstract |
The transcription factor c-Myc plays critical roles in cancer development and progression through regulating expression of targeted genes. Lactate dehydrogenase A (LDHA), which catalyzes the conversion of L- lactate to pyruvate in the final step of anaerobic glycolysis, is frequently upregulated in pancreatic cancer. However, little is known about the effects of c-Myc-LDHA axis in the progression of pancreatic cancer. In this study, we found that c-Myc and LDHA are concomitantly overexpressed in pancreatic cancer cell lines and clinical specimens. c-Myc overexpression and LDHA overexpression were correlated with TNM stage and tumor size and indicated poor prognosis in patients with pancreatic cancer. Knockdown of c-Myc reduced the protein expression of LDHA, lactate production and glucose consumption, and silencing of LDHA mimicked this effect. Meanwhile, reduced c-Myc-LDHA signaling resulted in decreased tumor growth and metastasis in pancreatic cancer. Treatment with 2-Deoxy-D-glucose, an inhibitor of anaerobic glycolysis, completely blocked the oncogenic roles of c-Myc-LDHA signaling. Taken together, dysregulated c-Myc-LDHA signaling plays important roles in aerobic glycolysis and facilitates tumor progression of pancreatic cancer.
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Authors | Tian-Lin He, Yi-Jie Zhang, Hui Jiang, Xiao-Hui Li, Hai Zhu, Kai-Lian Zheng |
Journal | Medical oncology (Northwood, London, England)
(Med Oncol)
Vol. 32
Issue 7
Pg. 187
(Jul 2015)
ISSN: 1559-131X [Electronic] United States |
PMID | 26021472
(Publication Type: Journal Article)
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Chemical References |
- Isoenzymes
- Proto-Oncogene Proteins c-myc
- L-Lactate Dehydrogenase
- Lactate Dehydrogenase 5
- Glucose
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Topics |
- Cell Line, Tumor
- Disease Progression
- Female
- Glucose
(genetics)
- Glycolysis
(genetics)
- Humans
- Isoenzymes
(genetics)
- L-Lactate Dehydrogenase
(genetics)
- Lactate Dehydrogenase 5
- Male
- Middle Aged
- Pancreatic Neoplasms
(genetics, pathology)
- Proto-Oncogene Proteins c-myc
(genetics)
- Signal Transduction
(genetics)
- Up-Regulation
(genetics)
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