Adenoviral transfer of mda-7 leads to BAX up-regulation and apoptosis in mesothelioma cells, and is abrogated by over-expression of BCL-XL

Xiaobo X. Cao, Imran Mohuiddin, Sunil Chada, Abner M. Mhashilkar, Mustafa K. Ozvaran, David McConkey, Steven D. Miller, Jonathon C. Daniel, W. Roy Smythe

Research output: Contribution to journalArticle

Abstract

Background: Malignant pleural mesothelioma (MPM) is unresponsive to conventional therapies. Forced expression of the novel tumor suppressor mda-7 gene in other cell types has resulted in decreased growth and apoptosis. We evaluated cell growth, apoptosis and tumor suppressor characteristics following forced expression of this gene in mesothelioma cell lines. Methods: MDA-7 expression in human MPM cells at baseline, following pharmacologic differentiation and viral mda-7 transduction (Ad-mda7) were evaluated with Western blot. Cell viability was evaluated with a colorimetric (XTT) assay, and apoptosis with subG1 FACS and Hoescht. Caspase-3 expression was evaluated by functional assay. These parameters were also evaluated in a stable bcl-xl hyper-expressing MPM cell line. Bax mRNA levels were evaluated with real-time PCR. Results: No baseline or differentiated MPM MDA7 expression was found, but was noted following Ad-mda7 exposure. More than 50% of MPM cells were killed at 5 days following Ad-mda7 exposure (p < 0.001). Apoptosis was accompanied by caspase-3 cleavage and increased BAX expression at both the protein (translational) and mRNA (transcriptional) level. These findings were reduced in a bcl-xl hyper-expressing cell line (P < 0.01). Conclusions: Although mda-7 does not appear to be a MPM suppressor gene, adenoviral-mediated expression in cell lines induces apoptotic cellular death related to BAX upregulation and caspase cleavage. This is supported by abrogation of effect in a bcl-xl hyper-expressing cell line.

Original languageEnglish (US)
Pages (from-to)869-876
Number of pages8
JournalMolecular Medicine
Volume8
Issue number12
StatePublished - Dec 1 2002
Externally publishedYes

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Mesothelioma
Up-Regulation
Apoptosis
Cell Line
Caspase 3
Suppressor Genes
Messenger RNA
Growth
Caspases
Malignant Mesothelioma
Real-Time Polymerase Chain Reaction
Neoplasms
Cell Survival
Western Blotting
Gene Expression
Genes
Proteins

ASJC Scopus subject areas

  • Genetics

Cite this

Cao, X. X., Mohuiddin, I., Chada, S., Mhashilkar, A. M., Ozvaran, M. K., McConkey, D., ... Smythe, W. R. (2002). Adenoviral transfer of mda-7 leads to BAX up-regulation and apoptosis in mesothelioma cells, and is abrogated by over-expression of BCL-XL. Molecular Medicine, 8(12), 869-876.

Adenoviral transfer of mda-7 leads to BAX up-regulation and apoptosis in mesothelioma cells, and is abrogated by over-expression of BCL-XL. / Cao, Xiaobo X.; Mohuiddin, Imran; Chada, Sunil; Mhashilkar, Abner M.; Ozvaran, Mustafa K.; McConkey, David; Miller, Steven D.; Daniel, Jonathon C.; Smythe, W. Roy.

In: Molecular Medicine, Vol. 8, No. 12, 01.12.2002, p. 869-876.

Research output: Contribution to journalArticle

Cao, XX, Mohuiddin, I, Chada, S, Mhashilkar, AM, Ozvaran, MK, McConkey, D, Miller, SD, Daniel, JC & Smythe, WR 2002, 'Adenoviral transfer of mda-7 leads to BAX up-regulation and apoptosis in mesothelioma cells, and is abrogated by over-expression of BCL-XL', Molecular Medicine, vol. 8, no. 12, pp. 869-876.
Cao, Xiaobo X. ; Mohuiddin, Imran ; Chada, Sunil ; Mhashilkar, Abner M. ; Ozvaran, Mustafa K. ; McConkey, David ; Miller, Steven D. ; Daniel, Jonathon C. ; Smythe, W. Roy. / Adenoviral transfer of mda-7 leads to BAX up-regulation and apoptosis in mesothelioma cells, and is abrogated by over-expression of BCL-XL. In: Molecular Medicine. 2002 ; Vol. 8, No. 12. pp. 869-876.
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abstract = "Background: Malignant pleural mesothelioma (MPM) is unresponsive to conventional therapies. Forced expression of the novel tumor suppressor mda-7 gene in other cell types has resulted in decreased growth and apoptosis. We evaluated cell growth, apoptosis and tumor suppressor characteristics following forced expression of this gene in mesothelioma cell lines. Methods: MDA-7 expression in human MPM cells at baseline, following pharmacologic differentiation and viral mda-7 transduction (Ad-mda7) were evaluated with Western blot. Cell viability was evaluated with a colorimetric (XTT) assay, and apoptosis with subG1 FACS and Hoescht. Caspase-3 expression was evaluated by functional assay. These parameters were also evaluated in a stable bcl-xl hyper-expressing MPM cell line. Bax mRNA levels were evaluated with real-time PCR. Results: No baseline or differentiated MPM MDA7 expression was found, but was noted following Ad-mda7 exposure. More than 50{\%} of MPM cells were killed at 5 days following Ad-mda7 exposure (p < 0.001). Apoptosis was accompanied by caspase-3 cleavage and increased BAX expression at both the protein (translational) and mRNA (transcriptional) level. These findings were reduced in a bcl-xl hyper-expressing cell line (P < 0.01). Conclusions: Although mda-7 does not appear to be a MPM suppressor gene, adenoviral-mediated expression in cell lines induces apoptotic cellular death related to BAX upregulation and caspase cleavage. This is supported by abrogation of effect in a bcl-xl hyper-expressing cell line.",
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T1 - Adenoviral transfer of mda-7 leads to BAX up-regulation and apoptosis in mesothelioma cells, and is abrogated by over-expression of BCL-XL

AU - Cao, Xiaobo X.

AU - Mohuiddin, Imran

AU - Chada, Sunil

AU - Mhashilkar, Abner M.

AU - Ozvaran, Mustafa K.

AU - McConkey, David

AU - Miller, Steven D.

AU - Daniel, Jonathon C.

AU - Smythe, W. Roy

PY - 2002/12/1

Y1 - 2002/12/1

N2 - Background: Malignant pleural mesothelioma (MPM) is unresponsive to conventional therapies. Forced expression of the novel tumor suppressor mda-7 gene in other cell types has resulted in decreased growth and apoptosis. We evaluated cell growth, apoptosis and tumor suppressor characteristics following forced expression of this gene in mesothelioma cell lines. Methods: MDA-7 expression in human MPM cells at baseline, following pharmacologic differentiation and viral mda-7 transduction (Ad-mda7) were evaluated with Western blot. Cell viability was evaluated with a colorimetric (XTT) assay, and apoptosis with subG1 FACS and Hoescht. Caspase-3 expression was evaluated by functional assay. These parameters were also evaluated in a stable bcl-xl hyper-expressing MPM cell line. Bax mRNA levels were evaluated with real-time PCR. Results: No baseline or differentiated MPM MDA7 expression was found, but was noted following Ad-mda7 exposure. More than 50% of MPM cells were killed at 5 days following Ad-mda7 exposure (p < 0.001). Apoptosis was accompanied by caspase-3 cleavage and increased BAX expression at both the protein (translational) and mRNA (transcriptional) level. These findings were reduced in a bcl-xl hyper-expressing cell line (P < 0.01). Conclusions: Although mda-7 does not appear to be a MPM suppressor gene, adenoviral-mediated expression in cell lines induces apoptotic cellular death related to BAX upregulation and caspase cleavage. This is supported by abrogation of effect in a bcl-xl hyper-expressing cell line.

AB - Background: Malignant pleural mesothelioma (MPM) is unresponsive to conventional therapies. Forced expression of the novel tumor suppressor mda-7 gene in other cell types has resulted in decreased growth and apoptosis. We evaluated cell growth, apoptosis and tumor suppressor characteristics following forced expression of this gene in mesothelioma cell lines. Methods: MDA-7 expression in human MPM cells at baseline, following pharmacologic differentiation and viral mda-7 transduction (Ad-mda7) were evaluated with Western blot. Cell viability was evaluated with a colorimetric (XTT) assay, and apoptosis with subG1 FACS and Hoescht. Caspase-3 expression was evaluated by functional assay. These parameters were also evaluated in a stable bcl-xl hyper-expressing MPM cell line. Bax mRNA levels were evaluated with real-time PCR. Results: No baseline or differentiated MPM MDA7 expression was found, but was noted following Ad-mda7 exposure. More than 50% of MPM cells were killed at 5 days following Ad-mda7 exposure (p < 0.001). Apoptosis was accompanied by caspase-3 cleavage and increased BAX expression at both the protein (translational) and mRNA (transcriptional) level. These findings were reduced in a bcl-xl hyper-expressing cell line (P < 0.01). Conclusions: Although mda-7 does not appear to be a MPM suppressor gene, adenoviral-mediated expression in cell lines induces apoptotic cellular death related to BAX upregulation and caspase cleavage. This is supported by abrogation of effect in a bcl-xl hyper-expressing cell line.

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