Down-regulation of Nucleophosmin/B23 mRNA delays the entry of cells into mitosis

Pei S. Jiang, Yat Ming Yung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)


In investigating the regulation of nucleophosmin/B23 mRNA expression at the entry of mitosis, the results of Northern gel blot analysis showed that the nucleophosmin/B23 mRNA levels significantly increased in prometaphase (nocodazole-arrested) or metaphase (colchicine-arrested) cells collected by mitotic shake-off. A higher level of nucleophosmin/B23 mRNA was detected in all the collected mitotic cells arrested by treatment with nocodazole for 10-18 h as compared to that in G2cells. An attempt was then made to determine whether the regulation of nucleophosmin/B23 mRNA plays a role in the control of entry into mitosis. Down regulation of nucleophosmin/B23 mRNA by transfection of its antisense construct resulted in the delay of cells entering mitosis. The demonstration of the characteristic changes in the mRNA level of nucleophosmin/B23 during the entry of cells into mitosis implicates the importance of nucleophosmin/B23 in the control of the mitotic fate of nucleoli and cell growth.
Original languageEnglish
Pages (from-to)865-870
Number of pages6
JournalBiochemical and Biophysical Research Communications
Issue number3
Publication statusPublished - 21 Apr 1999
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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