| H-7 and fetal calf serum (FCS) act synergistically to increase apoptosis in the KB line of human oral carcinoma cells. | |
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MedLine Citation:
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PMID: 11521953 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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There is a high incidence of oral squamous cell carcinoma (SCC) worldwide. The survival rate is among the lowest of the major cancers and has not improved significantly over the past two decades. The KB line of human oral carcinoma cells is a useful experimental system for studies of the biology of oral SCC. In a previous study, we reported inhibition of KB cell proliferation and stimulation of desmosome formation in confluent cultures treated with 20 microM H-7 (1-(5-isoquinolinylsulfonyl)-2-methylpiperazine). In the present study, the effects of this protein kinase C (PKC) inhibitor on the survival of KB cells were investigated. Apoptotic cells were detected using a combination of Hoechst 33258 nuclear stain, TUNEL technique and ultrastructural analysis. Our results indicated that H-7 significantly increased apoptosis in KB cells in a dose-dependent manner. Maximal stimulation occurred at 100 microM, the highest dose of H-7 tested. Apoptotic cells exhibited nuclear fragmentation, chromatin condensation and apoptotic bodies. Interestingly, H-7 and fetal calf serum (FCS) acted synergistically to increase apoptosis in KB cells, suggesting that there is a serum activated subpopulation of H-7 target cells in the cultures. The underlying mechanism of activation remains to be elucidated. Our study suggests that the PKC inhibitor H-7 is a potentially useful cytostatic agent for oral carcinoma cells. |
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Authors:
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S Florescu-Zorila; A H Shabana; M Oboeuf; N Martin; N Forest |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Tissue & cell Volume: 33 ISSN: 0040-8166 ISO Abbreviation: Tissue Cell Publication Date: 2001 Aug |
Date Detail:
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Created Date: 2001-08-27 Completed Date: 2002-01-28 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0214745 Medline TA: Tissue Cell Country: Scotland |
Other Details:
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Languages: eng Pagination: 368-75 Citation Subset: IM |
Affiliation:
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Laboratoire de Biologie-Odontologie, Faculté de Chirurgie Dentaire, Université Paris 7, Institut Biomedical des Cordeliers, France. silvanaflorescu@yahoo.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine
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administration & dosage,
pharmacology* Animals Apoptosis / drug effects* Blood Proteins / pharmacology* Cattle Cell Nucleus / drug effects Dose-Response Relationship, Drug Drug Synergism Enzyme Inhibitors / pharmacology Humans KB Cells Microscopy, Fluorescence Protein Kinase C / antagonists & inhibitors* |
| Chemical | |
Reg. No./Substance:
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0/Blood Proteins; 0/Enzyme Inhibitors; 84477-87-2/1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine; EC 2.7.11.13/Protein Kinase C |
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