The bcl-2 gene status of human head and neck cancer cell lines.

The bcl-2 gene status of human head and neck cancer cell lines. Research Abstract Details 

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The bcl-2 gene status of human head and neck cancer cell lines. Abstract Text:

A Salo,K Servomaa,A Kiuru,J Pulkkinen,R Grénman,K Pekkola-Heino,T Rytömaa,

The bcl-2 oncogene was originally found in the translocation in a pre-B cell acute lymphocytic leukemia cell line. Since then a high expression of Bcl-2 has been found in many types of cancer. The bcl-2 gene encodes an intracellular membrane-associated protein. Overexpression of bcl-2 inhibits apoptosis induced by many drugs and radiation. In this study the bcl-2 gene status of 9 human head and neck squamous cell carcinoma cell lines was studied. Mutations of the bcl-2 gene were studied at mRNA and DNA levels. The presence and abundance of the Bcl-2 protein in cells were also investigated. In earlier studies the p53 tumour suppressor gene was screened for point mutations, and the radiosensitivity of these cell lines was measured. We were able to amplify bcl-2 cDNA from 5 of the 9 cell lines, which shows that bcl-2 was expressed in these cells. No point mutations were found in the bcl-2 gene in any of these cell lines. Loss of heterozygosity was observed in 2 cell lines at the bcl-2 locus, and these cell lines had no detectable levels of bcl-2 mRNA or Bcl-2 protein. The Bcl-2 protein was abundant in the cell lines with the wild-type p53 gene, and these cell lines were radioresistant. The Bcl-2 protein was also found in many other cell lines in mitotic cells. It seems that cells expressing bcl-2 are radioresistant, and even functional p53 cannot induce apoptosis in these cells.

The bcl-2 gene status of human head and neck cancer cell lines. Publishing Authors By Initials

A Salo,K Servomaa,A Kiuru,J Pulkkinen,R Grénman,K Pekkola-Heino,T Rytömaa,

For similar cells: cells, cultured: tumor cells, cultured research abstracts see: cells: cells, cultured: tumor cells, cultured research

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The bcl-2 gene status of human head and neck cancer cell lines. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Acta oto-laryngologica. Supplementum

VOLUME: 529

Page Numbers: 233-6

Journal Abbreviation:

ISSN: 0365-5237

DAY: 13

MONTH: 02

YEAR: 1997

The bcl-2 gene status of human head and neck cancer cell lines. Information

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LANGUAGE: eng

NlmUniqueID: 370355

The bcl-2 gene status of human head and neck cancer cell lines. Keywords Mesh Terms:

KEYWORDS: Tumor Cells, Cultured

MESH TERMS: genetics

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Substance Name: RNA, Messenger

Registry Number: 0

Grant and Affiliation Information for The bcl-2 gene status of human head and neck cancer cell lines.

AFFILIATION: Finnish Centre for Radiation and Nuclear Safety, Helsinki, Finland.

Country: NORWAY

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MEDLINETA: Acta Otolaryngol Suppl

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