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Genes 2017, 8(12), 386;

Absence of Correlation between Chimeric RNA and Aging

Department of Pathology, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA
National Institute of Plant Genome Research (NIPGR), New Delhi 110067, India
Department of Biochemistry and Molecular Genetics, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA
Author to whom correspondence should be addressed.
Received: 18 November 2017 / Revised: 6 December 2017 / Accepted: 7 December 2017 / Published: 14 December 2017
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Chimeric RNAs have been recognized as a phenomenon not unique to cancer cells. They also exist in normal physiology. Aging is often characterized by deregulation of molecular and cellular mechanisms, including loss of heterochromatin, increased transcriptional noise, less tight control on alternative splicing, and more stress-induced changes. It is thus assumed that chimeric RNAs are more abundant in older people. In this study, we conducted a preliminary investigation to identify any chimeric RNAs with age-based trends in their expression levels in blood samples. A chimeric RNA candidate list generated by bioinformatic analysis indicated the possibility of both negative and positive trends in the expression of chimeric RNAs. Out of this candidate list, five novel chimeric RNAs were successfully amplified in multiple blood samples and then sequenced. Although primary smaller sample sizes displayed some weak trends with respect to age, analysis of quantitative PCR data from larger sample sizes showed essentially no relationship between expression levels and age. Altogether, these results indicate that, contradictory to the common assumption, chimeric RNAs as a group are not all higher in older individuals and that placing chimeric RNAs in the context of aging will be a much more complex task than initially anticipated. View Full-Text
Keywords: chimeric RNA; aging; cis-splicing of adjacent genes; trans-splicing chimeric RNA; aging; cis-splicing of adjacent genes; trans-splicing

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Huang, R.; Kumar, S.; Li, H. Absence of Correlation between Chimeric RNA and Aging. Genes 2017, 8, 386.

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