Abstract:
:The steady-state level of nucleophosmin/B23 mRNA decreased during berberine-induced (25 microg/ml, 24 to 96 hr) apoptosis of human leukemia HL-60 cells. A decline in telomerase activity was also observed in HL-60 cells treated with berberine. A stable clone of nucleophosmin/B23 overexpressed in HL-60 cells was selected and found to be less responsive to berberine-induced apoptosis. About 35% to 63% of control vector-transfected cells (pCR3) exhibited morphological characteristics of apoptosis, while about 8% to 45% of nucleophosmin/B23-over-expressed cells (pCR3-B23) became apoptotic after incubation with 15 microg/ml berberine for 48 to 96 hr. DNA extracted from pCR3 cells contained more fragmented DNA than pCR3-B23 cells during treatment with 15 microg/ml berberine for 24 to 48 hr. Our results indicate that berberine-induced apoptosis is associated with down-regulation of nucleophosmin/B23 and telomerase activity. We also suggest that nucleophosmin/B23 may play an important role in the control of the cellular response to apoptosis induction.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Wu HL,Hsu CY,Liu WH,Yung BYdoi
10.1002/(sici)1097-0215(19990611)81:6<923::aid-ijckeywords:
subject
Has Abstractpub_date
1999-06-11 00:00:00pages
923-9issue
6eissn
0020-7136issn
1097-0215pii
10.1002/(SICI)1097-0215(19990611)81:6<923::AID-IJCjournal_volume
81pub_type
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journal_title:International journal of cancer
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