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• W2077294080 endingPage "L119" @default.
• W2077294080 startingPage "L106" @default.
• W2077294080 abstract "Surfactant protein A (SP-A) plays a vital role in maintaining normal lung function and in host defense. Two genes encode SP-A in humans (SFTPA1, SFTPA2), and several gene variants have been identified for these. We have previously shown that sequence elements of SFTPA1 and SFTPA2 3′ untranslated regions (UTRs) differentially affect translation efficiency in vitro. Polymorphisms at the 3′UTRs of mRNA variants may account for differential binding of miRNAs, a class of small noncoding RNAs that regulate gene expression. In this work, we generated 3′UTR reporter constructs of the SFTPA1 and SFTPA2 variants most frequently found in the population, as well as mutants of a previously described 11-nt indel element (refSNP rs368700152). Reporter constructs were transfected in NCI-H441 cells in the presence or absence of miRNA mimics, and reporter gene expression was analyzed. We found that human miRNA mir-767 negatively affected expression of constructs containing SFTPA1 and SFTPA2 variants, whereas mir-4507 affected only constructs with 3′UTRs of SFTPA1 variants 6A, 6A 3 , and 6A 4 (not containing the 11-nt element). Three miRNAs (mir-183, mir-449b, and mir-612) inhibited expression of recombinants of SFTPA2 variants and the SFTPA1 variant 6A 2 , all containing the 11-nt element. Similar results were obtained for SP-A expression when these miRNAs were transfected in Chinese hamster ovary cells expressing SFTPA1 or SFTPA2 variants or in NCI-H441 cells (genotype 1A 5 /1A 5 -6A 4 /6A 4 ). Moreover, transfection with a specific antagomir (antagomir-183) reversed the effects of mir-183 on SP-A mRNA levels. Our results indicate that sequence variability at the 3′UTR of SP-A variants differentially affects miRNA regulation of gene expression." @default.
• W2077294080 created "2016-06-24" @default.
• W2077294080 creator A5043539183 @default.
• W2077294080 creator A5045307901 @default.
• W2077294080 creator A5066903326 @default.
• W2077294080 date "2014-07-01" @default.
• W2077294080 modified "2023-10-18" @default.
• W2077294080 title "An 11-nt sequence polymorphism at the 3′UTR of human SFTPA1 and SFTPA2 gene variants differentially affect gene expression levels and miRNA regulation in cell culture" @default.
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• W2077294080 doi "https://doi.org/10.1152/ajplung.00313.2013" @default.
• W2077294080 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4080286" @default.
• W2077294080 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24793167" @default.
• W2077294080 hasPublicationYear "2014" @default.
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