Key result
Human adenovirus 5 E1A RNA undergoes differential splicing when expressed in cis versus trans.
Why the study?
Complementing cell lines such as 293 cells are extensively used for production of viral vectors and vaccines with gene deletions, but differences in adenovirus 5 E1A RNA splicing in cis versus trans expression are not well characterized.
Answers are grounded in this paper and cite their sources.
Animal data on E1A splicing are hypothesis-generating; leaves open relevance to human adenovirus pathogenesis or vectors.
Human adenovirus has become an important tool for medicine and research, and 293 cells and various similar cell lines are used extensively for virus production in situations where high viral yields are important. Such complementing cell lines are used for the production of viral vectors and vaccines, which often have deletions and replacements in various viral genes.
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Graves et al. (2020) studied this question. Human Adenovirus 5 E1A RNA undergoes differential splicing when expressed in cis compared to expression in trans.
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