Abstract
Purpose
MicroRNA-21 (miR-21) was reported as being overexpressed in various human cancerous tissues, but its expression in cancerous serum was not unanimous in different laboratories. On the base of optimizing experimental design and improving trial protocol, we wanted to know whether the circulating microRNA-21 was dysregulated in the common solid cancers.
Methods
Using SYBR green real-time quantitative reverse transcription-PCR, we detected the expression of circulating miR-21 in 174 patients with solid cancers and 39 normal control subjects, including breast cancer, esophageal cancer, gastric cancer, colorectal cancer, lung cancer. Furthermore, we analyzed the associations between miR-21 expression and clinical features of patients.
Results
miR-21 was significantly overexpressed in human solid cancerous serum relative to normal control (P < 0.001), and its sensitivity and specificity were significantly higher than the currently used tumor markers. High miR-21 expression was not correlated with gender, age, clinical stage, and lymph node metastasis status.
Conclusion
Circulating miR-21 could serve as a potential broad-spectrum serum-based biomarker for the detection of some solid cancers.
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Abbreviations
- miR-21:
-
MicroRNA-21
- Ct:
-
Cycle threshold
- ROC:
-
Receiver operating characteristic
- RT-NTC:
-
Reverse transcription negative controls
- TPM1:
-
Tumor suppressor genes tropomyosin 1
- PDCD4:
-
Programmed cell death 4
- PTEN:
-
Phosphatase and tensin homolog
- RECK:
-
Reversion-inducing cysteine-rich protein with Kazal motifs
- BC:
-
Breast cancer
- CRC:
-
Colorectal cancer
- LC:
-
Lung cancer
- EC:
-
Esophageal cancer
- GC:
-
Gastric cancer
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We thank all subjects who participated in this study.
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The authors declare that neither financial nor non-financial competing interests exist.
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Wang, B., Zhang, Q. The expression and clinical significance of circulating microRNA-21 in serum of five solid tumors. J Cancer Res Clin Oncol 138, 1659–1666 (2012). https://doi.org/10.1007/s00432-012-1244-9
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DOI: https://doi.org/10.1007/s00432-012-1244-9