@misc{10481/88582, year = {2020}, url = {https://hdl.handle.net/10481/88582}, abstract = {The cell culture-based retrotransposition reporter assay has been (and is) an essential tool for the study of vertebrate Long INterspersed Elements (LINEs). Developed more than 20 years ago, this assay has been instrumental in characterizing the role of LINE-encoded proteins in retrotransposition, understanding how ribonucleoprotein particles are formed, how host factors regulate LINE mobilization, etc. Moreover, variations of the conventional assay have been developed to investigate the biology of other currently active human retrotransposons, such as Alu and SVA. Here,we describe a protocol that allows combination of the conventional cell culture-based LINE-1 retrotransposition reporter assay with short interfering RNAs (siRNAs) and microRNA (miRNAs) mimics or inhibitors, which has allowed us to uncover specific miRNAs and host factors that regulate retrotransposition. The protocol described here is highly reproducible, quantitative, robust and flexible, and allows the study of several small RNA classes and various retrotransposons. To illustrate its utility, here we show that siRNAs to Fanconi anaemia proteins (FANC-A and FANC-C) and an inhibitor of miRNA-20 upregulate and downregulate human L1 retrotransposition, respectively.}, organization = {J.L.G.-P. acknowledges funding from the European Research Council (ERC-Consolidator ERC-STG-2012-309433), MINECO-FEDER (SAF2017-89745-R), the Howard Hughes Medical Institute (IECS- 55007420), the Wellcome Trust-University of Edinburgh Institutional Strategic Support Fund (ISFF2) and a private donation to his laboratory from Ms Francisca Serrano (Trading y Bolsa para Torpes, Granada, Spain). S.M. was supported by the Government of Andalucia (FEDER-P08-CTS-03678). S.R.H. and P.T.-R. are funded by the Ramon y Cajal programme (RYC-2016-21395) and by MINECO-FEDER (SAF2015-71589-P). This paper is part of the thesis project of P.T.-R., within the Biomedicine Program of the University of Granada, Spain.}, publisher = {Royal Society}, title = {sRNA/L1 retrotransposition: using siRNAs and miRNAs to expand the applications of the cell culture-based LINE-1 retrotransposition assay}, doi = {10.1098/rstb.2019.0346.}, author = {Tristán Ramos, Pablo and Morell, Santiago and Toledo, Belén and García Pérez, José Luis and Rodríguez Heras, Sara}, }