Alteration of the nucleolar localization of poly(ADP-ribose) polymerase upon treatment with transcription inhibitors

Serge Desnoyers, Scott H Kaufmann, Guy G. Poirier

Research output: Contribution to journalArticle

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Abstract

The effect of RNA, DNA, and protein synthesis inhibitors on the subnuclear localization of poly(ADP-ribose) polymerase (PARP) was examined. Indirect immunofluorescence indicated that PARP was distributed throughout the nuclei but concentrated in nucleoli of MDBK, HeLa, and CHO cells. Treatment with the DNA synthesis inhihitor cytosine arabinoside or the protein synthesis inhibitor cycloheximide did not change the distribution of PARP. In contrast, incubation with the RNA-synthesis inhibitor 5,6-dichloro- 1-β-ribofuranosyl-benzimidazole (DRB) caused PARP immunofluorescence to become evenly distributed throughout the nucleus. This phenomenon was observed after a 1-h incubation with a DRB concentration that inhibited [5,6- 3Hluridine incorporation by 75%. Similar results were obtained with actinomycin D. Immunoblotting showed that the DRB treatment did not cause any changes in the integrity and content of PARP. Removal of DRB from the media allowed PARP to reaccumulate in nucleoli within 1 h, suggesting that the nucleolar localization of PARP is dependent upon active RNA synthesis.

Original languageEnglish (US)
Pages (from-to)146-153
Number of pages8
JournalExperimental Cell Research
Volume227
Issue number1
DOIs
StatePublished - Aug 25 1996

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Poly(ADP-ribose) Polymerases
Nucleic Acid Synthesis Inhibitors
Protein Synthesis Inhibitors
Therapeutics
CHO Cells
Cytarabine
Dactinomycin
Cycloheximide
Indirect Fluorescent Antibody Technique
HeLa Cells
Immunoblotting
Fluorescent Antibody Technique
RNA
benzimidazole
DNA

ASJC Scopus subject areas

  • Cell Biology

Cite this

Alteration of the nucleolar localization of poly(ADP-ribose) polymerase upon treatment with transcription inhibitors. / Desnoyers, Serge; Kaufmann, Scott H; Poirier, Guy G.

In: Experimental Cell Research, Vol. 227, No. 1, 25.08.1996, p. 146-153.

Research output: Contribution to journalArticle

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