title: The influence of STAT5 antisense oligodeoxynucleotides on the proliferation and apoptosis of selected human cutaneous T-cell lymphoma cell lines.
abstract: STAT5 (signal transducers and activators of transcription) are suggested to play a role in the pathogenesis of leukaemia and lymphoma; however, their influence on the growth of cutaneous T-cell lymphoma cells is not clear enough. The aim of our study was to analyse the function of STAT5 proteins in the proliferation and apoptosis of selected cutaneous T-cell lymphoma cell lines (HUT 78; PB-1; HUT 102B), using antisense oligodeoxynucleotide (ODN) strategy. RT-PCR and Western blot were applied to analyse the expression of STAT5 after incubation with antisense ODN (AS ODN). The effect of ODN pretreatment on the cell clonogenecity was analysed in methylcellulose cultures. The process of apoptosis was estimated using two different flow cytometry (FACScan) methods: (1) combined Annexin V/propidium iodide staining, (2) the TUNEL method. Perturbation of STAT5 expression reduced the proliferation of the PB-1 cells after a 24-h exposure to antisense ODNs. Prolonged exposure (72 h) decreased the growth of each examined cell line, especially after antisense STAT5A (AS STAT5A) treatment. Incubation with AS STAT5 induced apoptosis in the population of HUT 78 and PB-1 cells. STAT5s may play a significant role in the growth and the process of apoptosis of selected human cutaneous T-cell lymphoma cells.
authors.affiliation: Department of General Pathology, Pomeranian Medical University, Al. Powstańców Wlkp. 72, 70-111, Szczecin, Poland. poziomka@med.pam.szczecin.pl
authors.forename: Magdalena
authors.initials: M
authors.lastname: Baśkiewicz-Masiuk
authors.forename: Mieczysław
authors.initials: M
authors.lastname: Walczak
authors.forename: Ryszard
authors.initials: R
authors.lastname: Grzegrzółka
authors.forename: Danuta
authors.initials: D
authors.lastname: Rogowska
authors.forename: Bogusław
authors.initials: B
authors.lastname: Machaliński
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D015153:Blotting, Western; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D004273:DNA, Neoplasm / Q000235:genetics; D005434:Flow Cytometry; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D020287:In Situ Nick-End Labeling; D016399:Lymphoma, T-Cell / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D016376:Oligonucleotides, Antisense / Q000494:pharmacology*; D012333:RNA, Messenger / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D050799:STAT5 Transcription Factor / Q000235:genetics / Q000378:metabolism*; D012878:Skin Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology
chemical_list: D004273:DNA, Neoplasm; D016376:Oligonucleotides, Antisense; D012333:RNA, Messenger; D050799:STAT5 Transcription Factor