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Amatori et al.                                                                                                                                                                         RT-qPCR array for gene expression

           first observation made in HeLa cells, could be put in   Conflicts of interest
           relation with the known role of these CDKs in apoptosis,   There are no conflicts of interest.
           in addition to their known functions in regulation of cell
           cycle progression.  This hypothesis is supported by   Patient consent
                            [20]
           evidence that CDK2 silencing by shRNA decreases    Not applicable.
           cisplatin-induced  apoptosis  and  PARP  cleavage  in
           embryonal carcinoma models  and opens the door     Ethics approval
                                      [21]
           to possible future insights.                       Not applicable.
           Regarding  the  effects  of  NaBu,  our  data  confirm   REFERENCES
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           In  summary,  we  have  designed,  optimized,  and   9.   Derjuga A, Richard C, Crosato M, Wright PS, Chalifour L, Valdez
           biologically  validated an RT-qPCR array that can be   J, Barraso A, Crissman HA, Nishioka W, Bradbury EM, Th’ng JP.
           exploited  to robustly analyze  expression  of genes   Expression of p21Waf1/Cip1 and cyclin D1 is increased in butyrate-
                                                                 resistant HeLa cells. J Biol Chem 2001;276:37815-20.
           involved  in cell cycle regulation, DNA damage     10.  Park JK, Cho CH, Ramachandran S, Shin SJ, Kwon SH, Kwon SY,
           response, apoptosis, and senescence induction.        Cha  SD.  Augmentation  of sodium  butyrate-induced  apoptosis  by
                                                                 phosphatidylinositol 3-kinase inhibition in the human cervical cancer
           This  array  represents  a  reliable,  inexpensive,  and   cell-line. Cancer Res Treat 2006;38:112-7.
           rapid tool that could be exploited to provide an   11.  Amatori S, Mazzoni L, Alvarez-Suarez JM, Giampieri F, Gasparrini
           overview of molecular pathways activated by drug      M,  Forbes-Hernandez  TY,  Afrin  S,  ErricoProvenzano  A,  Persico
           treatment  in  human  cancer  cells.  Moreover,  we   G,  Mezzetti  B,  Amici  A,  Fanelli  M,  Battino  M.  Polyphenol-rich
                                                                 strawberry extract  (PRSE) shows in vitro  and in vivo biological
           believe that detailed description of the procedure will   activity against invasive breast cancer cells. Sci Rep 2016;6:30917.
           allow application of the RT-qPCR array in different   12.  Amatori  S, Ballarini  M, Faversani  A, Belloni  E, Fusar F, Bosari
           experimental conditions and could contribute to       S, Pelicci PG, Minucci S, Fanelli M. PAT-ChIP coupled with laser
           understand  the  molecular  mechanisms  of  action  of   microdissection  allows the study of chromatin in selected  cell
           new drugs in the context of pharmacologic studies.    populations  from  paraffin-embedded  patient  samples.  Epigenetics
                                                                 Chromatin 2014;7:18.
           Authors’ contributions                             13.  Guerzoni C, Amatori S, Giorgi L, Manara MC, Landuzzi L, Lollini
                                                                 PL, Tassini A, Balducci M, Manfrini M, Pratelli L, Serra M, Picci
           Study conception and design: M. Fanelli, S. Amatori   P, Magnani M, Fusi V, Fanelli M, Scotlandi K. An aza-macrocycle
           Primers design  and PCR conditions optimization: S.   containing  maltolic  side-arms  (maltonis)  as  potential  drug  against
           Amatori                                               human pediatric sarcomas. BMC Cancer 2014;14:137.
           Validation of the RT-qPCR array: G. Persico        14.  Rippo MR, Villanova F, TomassoniArdori F, Graciotti L, Amatori S,
           Manuscript writing and editing: M. Fanelli, S. Amatori  Manzotti S, Fanelli M, Gigante A, Procopio A. Dexamethasone affects
                                                                 Fas- and serum deprivation-induced cell death of human osteoblastic
           Financial support and sponsorship                     cells  through survivin regulation.  Int J Immunopathol Pharmacol
                                                                 2010;23:1153-65.
           This work was supported by Associazione a Sostegno   15.  Andersen  CL,  Jensen  JL,  Ørntoft  TF.  Normalization  of  real-time
           degli Studi Oncologici (ASSO), Fano (PU), Italy.      quantitative  RT-PCR data:  a  model  based  variance  estimation
            98                                                                       Journal of Cancer Metastasis and Treatment ¦ Volume 3 ¦ May 24, 2017
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