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Mariniello RM, Maria Orlandella F, De Stefano AE, Iervolino PLC, Smaldone G, Luciano N, Cervone N, Munciguerra F, Esposito S, Mirabelli P, Salvatore G. The TUSC2 Tumour Suppressor Inhibits the Malignant Phenotype of Human Thyroid Cancer Cells via SMAC/DIABLO Protein. Int J Mol Sci 2020; 21:ijms21030702. [PMID: 31973107 PMCID: PMC7037188 DOI: 10.3390/ijms21030702] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 01/15/2020] [Indexed: 12/11/2022] Open
Abstract
Thyroid carcinoma is the most common endocrine cancer and includes different forms. Among these, anaplastic thyroid carcinoma (ATC) is the rarest but the most lethal subtype, compared to papillary thyroid carcinoma (PTC) which shows an overall good prognosis. We have previously showed that Tumor Suppressor Candidate 2 (TUSC2), a known tumour suppressor gene, is downregulated in human PTC and ATC compared to normal thyroid samples. The aim of this study was to gain insight into the molecular mechanisms induced by TUSC2 in thyroid cancer cells. Here, we stably transfected TUSC2 in papillary (TPC-1) and in anaplastic (8505C) thyroid cancer cell lines and studied its effects on several biological processes, demonstrating that TUSC2 overexpression decreased thyroid cancer cell proliferation, migration and invasion. Through the proteome profiler apoptosis array, we observed that TUSC2 increased sensitivity to apoptosis by increasing the SMAC/DIABLO and CYTOCHROME C proteins. On the other hand, transient silencing of TUSC2, by siRNA, in an immortalized thyroid follicular epithelial cell line (Nthy-ori 3-1) showed the opposite effect. Finally modulation of SMAC/DIABLO partially rescued the biological effects of TUSC2. Thus, our data highlight a tumour suppressor role of TUSC2 in thyroid carcinogenesis, suggesting that it could be a promising target and biomarker for thyroid carcinoma.
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Affiliation(s)
- Raffaela Mariarosaria Mariniello
- Dipartimento di Scienze Motorie e del Benessere, Universita’ “Parthenope”, Via Medina 40, 80133 Napoli, Italy
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | | | - Anna Elisa De Stefano
- Dipartimento di Scienze Motorie e del Benessere, Universita’ “Parthenope”, Via Medina 40, 80133 Napoli, Italy
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Paola Lucia Chiara Iervolino
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
- Dipartimento di Scienze Biomediche Avanzate, Universita’ “Federico II”, Via Pansini 5, 80131 Napoli, Italy
| | | | - Neila Luciano
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Nara Cervone
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Francesco Munciguerra
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Silvia Esposito
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | | | - Giuliana Salvatore
- Dipartimento di Scienze Motorie e del Benessere, Universita’ “Parthenope”, Via Medina 40, 80133 Napoli, Italy
- CEINGE—Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Napoli, Italy
- IRCCS SDN, Via Emanuele Gianturco 113, 80143 Napoli, Italy
- Correspondence:
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