miRNA regulation of Sirtuin-1 expression in human astrocytoma

Sirtuins are a family of 7 histone deacetylases largely involved in the regulation of cell proliferation, survival and death. The role of sirtuins in tumorigenesis and cancer progression has been previously studied in certain cancer types. Few studies have investigated sirtuin expression in gliomas,...

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Bibliographic Details
Published in:Oncology letters 2016-10, Vol.12 (4), p.2992-2998
Main Authors: Romeo, Sara Giovanna, Conti, Alfredo, Polito, Francesca, Tomasello, Chiara, Barresi, Valeria, La Torre, Domenico La, Cucinotta, Maria, Angileri, Flavio Filippo, Bartolotta, Marcello, Di Giorgio, Rosa Maria, Aguennouz, M'Hammed
Format: Article
Language:English
Subjects:
Apoptosis
Astrocytoma
Brain cancer
Care and treatment
Cell cycle
Cell division
Cell growth
Development and progression
Gene expression
Genetic aspects
glioblastoma multiforme
Glioma
glioma cell lines
Health aspects
histone deacethylases
Kinases
Metabolism
MicroRNA
Neurosurgery
Oncology
Prostate
Proteins
Radiation therapy
Sirtuin-1
Stem cells
Studies
Tumorigenesis
Tumors
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Summary:Sirtuins are a family of 7 histone deacetylases largely involved in the regulation of cell proliferation, survival and death. The role of sirtuins in tumorigenesis and cancer progression has been previously studied in certain cancer types. Few studies have investigated sirtuin expression in gliomas, with controversial results. The aim of the present study was to investigate the expression of sirtuin-1 (Sirt-1) in diffuse astrocytoma [low grade astrocytoma (LGA)], anaplastic astrocytoma (AA) and glioblastoma multiforme (GBM) and in primary glioma cell lines: PLGAC (primary LGA cells); PAAC (primary AA cells); and PGBMC (primary GBM cells). Tumor samples were obtained from patients who underwent craniotomy for microsurgical tumor resection at the Neurosurgery Unit of the University of Messina between 2011 and 2014. Sirt-1 expression was qualitatively analyzed in 30 human glial tumor samples and 5 non-neoplastic brain tissue (NBT) specimens using immunohistochemistry and western blotting techniques. Sirt-1 expression was quantitatively analyzed by reverse transcription-quantitative polymerase chain reaction (RT-qPCR). In addition, Sirt-1 expression in primary cell lines was investigated by immunoblotting and RT-qPCR. Sirt-1 expression was downregulated in gliomas compared to NBTs. Sirt-1 levels also varied among different tumor grades, with more evident downregulation in high-grade (P
ISSN:1792-1074
1792-1082
DOI:10.3892/ol.2016.4960