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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Low miR-143/miR-145 Cluster Levels Induce Activin A Overexpression in Oral Squamous Cell Carcinomas, Which Contributes to Poor Prognosis

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Author(s):
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Bufalino, Andreia [1] ; Cervigne, Nilva K. [1] ; de Oliveira, Carine Ervolino [1] ; Fonseca, Felipe Paiva [1] ; Rodrigues, Priscila Campioni [1] ; Soares Macedo, Carolina Carneiro [1] ; Sobral, Lays Martin [1] ; Miguel, Marcia Costa [2, 1] ; Lopes, Marcio Ajudarte [1] ; Paes Leme, Adriana Franco [3] ; Lambert, Daniel W. [4, 5] ; Salo, Tuula A. [6, 7, 8, 9, 1] ; Kowalski, Luiz Paulo [10] ; Graner, Edgard [1] ; Coletta, Ricardo D. [1]
Total Authors: 15
Affiliation:
[1] Univ Estadual Campinas, Sch Dent, Dept Oral Diag, Piracicaba, SP - Brazil
[2] Univ Fed Rio Grande do Norte, Dept Dent, BR-59072970 Natal, RN - Brazil
[3] CNPEM, Brazilian Biociences Natl Lab, Campinas, SP - Brazil
[4] Univ Sheffield, Sch Clin Dent, Integrated Biosci, Sheffield, S Yorkshire - England
[5] Univ Sheffield, Sheffield Canc Ctr, Sheffield, S Yorkshire - England
[6] Univ Oulu, Oulu Univ Hosp, Oulu - Finland
[7] Univ Oulu, Med Res Ctr, Oulu - Finland
[8] Univ Helsinki, Inst Dent, Helsinki - Finland
[9] Univ Oulu, Inst Dent, Dept Diagnost & Oral Med, Oulu - Finland
[10] AC Camargo Canc Ctr, Dept Head & Neck Surg & Otorhinolaryngol, Sao Paulo, SP - Brazil
Total Affiliations: 10
Document type: Journal article
Source: PLoS One; v. 10, n. 8 AUG 28 2015.
Web of Science Citations: 23
Abstract

Deregulated expression of activin A is reported in several tumors, but its biological functions in oral squamous cell carcinoma (OSCC) are unknown. Here, we investigate whether activin A can play a causal role in OSCCs. Activin A expression was assessed by qPCR and immunohistochemistry in OSCC tissues. Low activin A-expressing cells were treated with recombinant activin A and assessed for apoptosis, proliferation, adhesion, migration, invasion and epithelial-mesenchymal transition (EMT). Those phenotypes were also evaluated in high activin A-expressing cells treated with follistatin (an activin A antagonist) or stably expressing shRNA targeting activin A. Transfections of microRNA mimics were performed to determine whether the overexpression of activin A is regulated by miR-143/miR-145 cluster. Activin A was overexpressed in OSCCs in comparison with normal oral mucosa, and high activin A levels were significantly associated with lymph node metastasis, tumor differentiation and poor survival. High activin A levels promoted multiple properties associated with malignant transformation, including decreased apoptosis and increased proliferation, migration, invasion and EMT. Both miR-143 and miR-145 were markedly downregulated in OSCC cell lines and in clinical specimens, and inversely correlated to activin A levels. Forced expression of miR-143 and miR-145 in OSCC cells significantly decreased the expression of activin A. Overexpression of activin A in OSCCs, which is controlled by downregulation of miR-143/miR-145 cluster, regulates apoptosis, proliferation and invasiveness, and it is clinically correlated with lymph node metastasis and poor survival. (AU)

FAPESP's process: 13/01607-6 - The biological role of EEF1D, fascin and plectin on oral squamous cell carcinoma
Grantee:Ricardo Della Coletta
Support type: Regular Research Grants