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Full paper is free online. This presents another way genetically modified or synthetic organisms could be dangerous as food, since we haven't been eating them for eons for our bodies to have evolved to safely consuming them.
Maggie

     On Wednesday, January 3, 2018 4:47 PM, Glenn Ashton via SynBioCritics <[log in to unmask]> wrote:
 

        Sci Rep. 2017; 7: 645.  Published online 2017 Apr 5.  doi:  10.1038/s41598-017-00488-y     PMCID: PMC5428504     
A further reason to test & monitor mRNA events.
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Detection of dietetically absorbed maize-derived microRNAs in pigs
  Yi Luo,#1 Pengjun Wang,#1 Xun Wang,#1 Yuhao Wang,1 Zhiping Mu,1,2 Qingzhi Li,1,3 Yuhua Fu,1,4 Juan Xiao,1 Guojun Li,1 Yao Ma,1 Yiren Gu,5 Long Jin,1 Jideng Ma,1 Qianzi Tang,1 Anan Jiang,1 Xuewei Li,1 and Mingzhou Li1   Author information ► Article notes ► Copyright and License information ►    This article has been cited by other articles in PMC.     Go to: 
Abstract
  MicroRNAs are a class of small RNAs that are important in post-transcriptional gene regulation in animals and plants. These single-stranded molecules are widely distributed in organisms and influence fundamental biological processes. Interestingly, recent studies have reported that diet-derived plant miRNAs could regulate mammalian gene expression, and these studies have broadened our view of cross-kingdom communication. In the present study, we evaluated miRNA levels in cooked maize-containing chow diets, and found that plant miRNAs were resistant to the harsh cooking conditions to a certain extent. After feeding fresh maize to pigs (7 days), maize-derived miRNAs could be detected in porcine tissues and serum, and the authenticity of these plant miRNAs was confirmed by using oxidization reactions. Furthermore, in vivo and in vitro experiments demonstrated that dietary maize miRNAs could cross the gastrointestinal tract and enter the porcine bloodstream. In the porcine cells, we found that plant miRNAs are very likely to specifically target their endogenous porcine mRNAs and influence gene expression in a fashion similar to that of mammalian miRNAs. Our results indicate that maize-derived miRNAs can cross the gastrointestinal tract and present in pigs, and these exogenous miRNAs have the potential to regulate mammalian gene expression.   -- 
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