Journal
REPRODUCTIVE SCIENCES
Volume 15, Issue 4, Pages 400-410Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/1933719107314063
Keywords
uterine leiomyoma; cyclin G1; cyclin G1 ribbon-type antisense; oligonucleotides; p53; apoptosis
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Observations from the authors' laboratory suggest a physiological role for increased cyclin G1 protein levels in human uterine leiomyoma. The hypothesis of the present study is that the strategic modulation of cyclin G I by antisense technology will inhibit the survival of in vitro-grown uterine leiomyoma cells. Cultured uterine leiomyoma cells were transfected with cyclin G1 ribbon-type antisense oligonucleotide (cyclin G1 RiAS) to effectively reduce cyclin G1 expression. Cell viability, in situ terminal deoxyuridine nick end-labeling (TUNTEL) assay, flow cytometry, DNA fragmentation, and expression of cell cycle regulatory-related proteins were evaluated by Western blot. Antisense oligonucleotides compromised uterine leiomyoma cell viability and inducted apoptosis in a caspase-independent mechanism. In situ TUNEL and DNA fragmentation revealed apoptosis induction, and fluorescent-activated cell sorting analysis showed increased sub-G1-phase cells. Furthermore, abrogation of cyclin G1 enhanced p53 accumulation, phosphorylation of p53 at Ser-15 residue, and increased expression of cyclin-dependent kinase inhibitors p21 and p27. These data imply that cyclin G 1 expression is associated with growth promotion and the potential utility and novelty of using ribbon-type antisense oligo nucleotides as a gene therapy strategy to treat human uterine leiomyoma.
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