Abstract | CONTEXT: OBJECTIVES: To investigate the effects of BRAF(V600E) on the expression of uPA and uPAR and to evaluate the prognostic relevance of BRAF(V600E) alone or in combination with uPA and uPAR. DESIGN/SETTING/PATIENTS/INTERVENTION: The case study included 91 patients with PTC. All patients underwent thyroidectomy and radioiodine therapy. Follow-up was available for 75 patients. MAIN OUTCOME MEASURES: The BRAF(V600E) mutation was analysed by sequencing and mutant allele-specific PCR amplification; uPA and uPAR expression by quantitative RT-PCR. RESULTS: BRAF(V600E) was found in 44 of the 91 patients and associated with older age, but not with high-risk clinicopathological features. Urokinase PA and uPAR mRNA levels were higher in tumour tissues by 9·51 ± 1·30 and 4·64 ± 0·44 fold, respectively, compared to normal matched tissues, being significantly higher in BRAF(V600E) -positive patients. In vitro induction of BRAF(V600E) in PCCL3 cells caused a significant increase in both uPA and uPAR mRNAs. Higher levels of uPA and uPAR correlated with lymph node metastases, TNM stage and disease recurrences. Kaplan-Meier and multivariate analyses demonstrated that uPA and uPAR were associated with shorter DFI, while the BRAF(V600E) was not. CONCLUSION: In PTC, BRAF(V600E) induces uPA and uPAR expression. The latter, but not BRAF(V600E) , associates with advanced stages and shorter DFI. If confirmed in larger case studies, they may represent reliable prognostic markers for more accurate risk stratification and postoperative decision-making in patients with PTC.
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Authors | Salvatore Ulisse, Enke Baldini, Salvatore Sorrenti, Susi Barollo, Natalie Prinzi, Antonio Catania, Angela Nesca, Lucio Gnessi, Maria R Pelizzo, Caterina Mian, Corrado De Vito, Anna Calvanese, Silvio Palermo, Severino Persechino, Enrico De Antoni, Massimino D'Armiento |
Journal | Clinical endocrinology
(Clin Endocrinol (Oxf))
Vol. 77
Issue 5
Pg. 780-6
(Nov 2012)
ISSN: 1365-2265 [Electronic] England |
PMID | 22702340
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2012 Blackwell Publishing Ltd. |
Chemical References |
- Receptors, Urokinase Plasminogen Activator
- BRAF protein, human
- Proto-Oncogene Proteins B-raf
- Urokinase-Type Plasminogen Activator
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Topics |
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Animals
- Carcinoma
(genetics, metabolism, pathology)
- Carcinoma, Papillary
(genetics, metabolism, pathology)
- Cell Line
- Child
- Female
- Humans
- Male
- Middle Aged
- Polymerase Chain Reaction
- Proto-Oncogene Proteins B-raf
(genetics)
- Rats
- Receptors, Urokinase Plasminogen Activator
(genetics, metabolism)
- Thyroid Cancer, Papillary
- Thyroid Neoplasms
(genetics, metabolism, pathology)
- Urokinase-Type Plasminogen Activator
(genetics, metabolism)
- Young Adult
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