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Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression

  • Authors:
    • Aikaterini Fragou
    • Georgios Tzimagiorgis
    • Christos Karageorgopoulos
    • Nikolaos Barbetakis
    • Axilleas Lazopoulos
    • Maria Papaioannou
    • Costas Haitoglou
    • Sofia Kouidou
  • View Affiliations / Copyright

    Affiliations: Laboratory of Biological Chemistry, Medical Department, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, Department of Thoracic Surgery, Theagenion Anticancer Hospital, Thessaloniki 54007, Greece
    Copyright: © Fragou et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1455-1460
    |
    Published online on: February 2, 2017
       https://doi.org/10.3892/mmr.2017.6162
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Abstract

Modification of p53 expression levels and its principle apoptosis and cell cycle regulatory partners, mouse double minute 2 homolog (MDM‑2) and p21, has been previously reported in various types of cancer. In the current study, the expression of Δ133p53 isoforms was investigated in lung carcinomas with respect to the expression of the aforementioned genes. The expression of p53 full‑length transcript and Δ133p53 isoforms α, β and γ transcripts, MDM‑2 and p21 transcripts were determined by reverse transcription‑quantitative polymerase chain reaction, in total RNA isolated from 17 lung carcinoma specimens and 17 corresponding adjacent non‑cancerous tissues. RNA expression analysis was performed according to the Pfaffl equation and Rest tool using β‑actin as a reference gene. Detection of the above proteins was additionally performed by western blotting. Significant overexpression of the Δ133p53 mRNAs was observed in cancerous as compared with adjacent non‑cancerous tissues (3.94‑fold), whereas full‑length p53 and MDM‑2 expression exhibited a smaller, however significant, increase. The expression of the p21 transcript was significantly reduced in cancerous specimens. Δ133p53 and p21 expression levels varied in parallel, however were not significantly correlated. p53 full‑length protein expression observed by western blot analysis strongly varied from the Δ133p53 isoforms, however MDM‑2 protein isoforms were not detectable and p21 protein was more abundant in non‑cancerous tissues. In conclusion, Δ133p53 mRNA levels is suggested as a potentially useful marker of malignancy in lung cancer. The absence of Δ133p53 protein in lung carcinomas, which overexpress Δ133p53 transcripts, may indicate the role of the latter in post‑transcriptional regulation through RNA interference in the cell cycle and apoptosis.
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Copy and paste a formatted citation
Spandidos Publications style
Fragou A, Tzimagiorgis G, Karageorgopoulos C, Barbetakis N, Lazopoulos A, Papaioannou M, Haitoglou C and Kouidou S: Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression. Mol Med Rep 15: 1455-1460, 2017.
APA
Fragou, A., Tzimagiorgis, G., Karageorgopoulos, C., Barbetakis, N., Lazopoulos, A., Papaioannou, M. ... Kouidou, S. (2017). Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression. Molecular Medicine Reports, 15, 1455-1460. https://doi.org/10.3892/mmr.2017.6162
MLA
Fragou, A., Tzimagiorgis, G., Karageorgopoulos, C., Barbetakis, N., Lazopoulos, A., Papaioannou, M., Haitoglou, C., Kouidou, S."Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression". Molecular Medicine Reports 15.4 (2017): 1455-1460.
Chicago
Fragou, A., Tzimagiorgis, G., Karageorgopoulos, C., Barbetakis, N., Lazopoulos, A., Papaioannou, M., Haitoglou, C., Kouidou, S."Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression". Molecular Medicine Reports 15, no. 4 (2017): 1455-1460. https://doi.org/10.3892/mmr.2017.6162
Copy and paste a formatted citation
x
Spandidos Publications style
Fragou A, Tzimagiorgis G, Karageorgopoulos C, Barbetakis N, Lazopoulos A, Papaioannou M, Haitoglou C and Kouidou S: Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression. Mol Med Rep 15: 1455-1460, 2017.
APA
Fragou, A., Tzimagiorgis, G., Karageorgopoulos, C., Barbetakis, N., Lazopoulos, A., Papaioannou, M. ... Kouidou, S. (2017). Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression. Molecular Medicine Reports, 15, 1455-1460. https://doi.org/10.3892/mmr.2017.6162
MLA
Fragou, A., Tzimagiorgis, G., Karageorgopoulos, C., Barbetakis, N., Lazopoulos, A., Papaioannou, M., Haitoglou, C., Kouidou, S."Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression". Molecular Medicine Reports 15.4 (2017): 1455-1460.
Chicago
Fragou, A., Tzimagiorgis, G., Karageorgopoulos, C., Barbetakis, N., Lazopoulos, A., Papaioannou, M., Haitoglou, C., Kouidou, S."Increased Δ133p53 mRNA in lung carcinoma corresponds with reduction of p21 expression". Molecular Medicine Reports 15, no. 4 (2017): 1455-1460. https://doi.org/10.3892/mmr.2017.6162
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