Edorium Journal of

Tumor Biology

 
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Original Article
 
Elevated PRP19 expression targets Bcl-2 and CASP3 expression to inhibit human lung adenocarcinoma cells apoptosis in vitro
Benjamin Arko-Boham1, Isaac Okai2, Shujuan Shao3
1Department of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra, Ghana.
2Department of Human Anatomy, School of Medical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
3Liaoning Provincial Key Laboratory for Proteomics, Department of Histology and Embryology, Dalian Medical University, 9 Western Section, Lvshun South Road, Dalian, China, 116044.

Article ID: 100005T09BA2016
doi:10.5348/T09-2016-5-OA-2

Address correspondence to:
Benjamin Arko-Boham
P.O. Box KB 876
Korle-Bu, Accra
Ghana

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How to cite this article
Arko-Boham B, Okai I, Shao S. Elevated PRP19 expression targets Bcl-2 and CASP3 expression to inhibit human lung adenocarcinoma cells apoptosis in vitro. Edorium J Tumor Bio 2016;3:9–18.


Abstract
Aims: The gene product of PRP19 besides constituting a central player in the spliceosomal machinery, functions in DNA damage repair, a process that aborts the hasty and unwarranted destruction of cell harbouring irreparable DNA damages by apoptosis. Such DNA alterations are common features underlying tumorigenesis. Based on our earlier report that PRP19 overexpression is inhibitory to proliferation in lung tumor cells, we further investigated the effect of elevated expression of PRP19 on cell survival.
Methods: PRP19 expression was augmented in cultured A549 cells via plasmid transfection. Growing cells were subjected to various cell survival and apoptosis assays including CCK-8, DAPI, TUNEL and FITC-Annexin V staining. Lysates were obtained from harvested cells for immunoblotting for the assessment of expression of key apoptotic proteins.
Results: Lung adenocarcinoma cells A549, overexpressing PRP19 via plasmid transfection exhibited delayed onset of apoptosis thereby prolonging their life span. Further test by western blot on key proteins involved in apoptosis regulation revealed that PRP19 overexpression led to augmented expression of anti-apoptotic Bcl-2 proteins while diminishing the expression of caspase-3. The expression of pro-apoptotic protein Bax, was unaltered among test and control groups. The Bcl-2 higher expression coupled with suppression of caspase-3 possibly underlies the in vitro inhibition of apoptosis following PRP19 upregulation.
Conclusion: PRP19 overexpression resulted in a modest suppression of apoptosis to prevent the hasty destruction of cells with compromised genomic integrity. This is beneficial to the cell and may explain why PRP19 expression in tumor tissues is higher than in non-tumor tissues.

Keywords: Apoptosis, DNA damage, PRP19, Lung tumor


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Author Contributions:
Benjamin Arko-Boham – Substantial contributions to conception and design, Acquisition of data, Analysis and interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Isaac Okai – Acquisition of data, Analysis and interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Shujuan Shao – Substantial contributions to conception and design, Revising it critically for important intellectual content, Final approval of the version to be published
Guarantor of submission
The corresponding author is the guarantor of submission.
Source of support
None
Conflict of interest
Authors declare no conflict of interest.
Copyright
© 2016 Benjamin Arko-Boham et al. This article is distributed under the terms of Creative Commons Attribution License which permits unrestricted use, distribution and reproduction in any medium provided the original author(s) and original publisher are properly credited. Please see the copyright policy on the journal website for more information.



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