PMID- 30694456 OWN - NLM STAT- MEDLINE DCOM- 20190909 LR - 20200225 IS - 1573-4978 (Electronic) IS - 0301-4851 (Linking) VI - 46 IP - 2 DP - 2019 Apr TI - Episomal minicircles persist in periods of transcriptional inactivity and can be transmitted through somatic cell nuclear transfer into bovine embryos. PG - 1737-1746 LID - 10.1007/s11033-019-04624-x [doi] AB - Episomal plasmids based on a scaffold/matrix attachment region (S/MAR) are extrachromosomal DNA entities that replicate once per cell cycle and are stably maintained in cells or tissue. We generated minicircles, episomal plasmids devoid of bacterial sequences, and show that they are stably transmitted in clonal primary bovine fibroblasts without selection pressure over more than two months. Total DNA, plasmid extraction and fluorescence in situ hybridization (FISH) analyses suggest that the minicircles remained episomal and were not integrated into the genome. Minicircles survived extended periods in serum-starved cells, which indicates that ongoing transcription in non-proliferating cells is not necessary for the maintenance of S/MAR-episomes. To test whether minicircles endure the process of somatic cell nuclear transfer (SCNT), we used cell-cycle synchronized, serum-starved, minicircle-containing cells. Analysis of cells outgrown from SCNT-derived blastocysts shows that the minicircles are maintained through SCNT and early embryonic development, which raises the prospect of using cell lines with episomal minicircles for the generation of transgenic animals. FAU - Wagner, Stefan AU - Wagner S AUID- ORCID: 0000-0003-4874-9304 AD - AgResearch Limited, Ruakura Research Centre, Hamilton, 3240, New Zealand. stefan.wagner@abdn.ac.uk. AD - Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, UK. stefan.wagner@abdn.ac.uk. FAU - McCracken, Judi AU - McCracken J AUID- ORCID: 0000-0003-4709-6479 AD - AgResearch Limited, Ruakura Research Centre, Hamilton, 3240, New Zealand. FAU - Bruszies, Sabine AU - Bruszies S AD - AgResearch Limited, Ruakura Research Centre, Hamilton, 3240, New Zealand. FAU - Broadhurst, Ric AU - Broadhurst R AD - AgResearch Limited, Ruakura Research Centre, Hamilton, 3240, New Zealand. FAU - Wells, David N AU - Wells DN AD - AgResearch Limited, Ruakura Research Centre, Hamilton, 3240, New Zealand. FAU - Oback, Bjorn AU - Oback B AD - AgResearch Limited, Ruakura Research Centre, Hamilton, 3240, New Zealand. FAU - Bode, Jurgen AU - Bode J AD - Hannover Medical School (MHH), Carl-Neuberg-Strasse 1, 30625, Hannover, Germany. FAU - Laible, Gotz AU - Laible G AD - AgResearch Limited, Ruakura Research Centre, Hamilton, 3240, New Zealand. LA - eng GR - 123/Ministry of Business, Innovation and Employment/ PT - Journal Article DEP - 20190129 PL - Netherlands TA - Mol Biol Rep JT - Molecular biology reports JID - 0403234 RN - 0 (DNA, Circular) SB - IM MH - Animals MH - Animals, Genetically Modified/genetics MH - Blastocyst MH - Cattle MH - DNA, Circular/genetics/*physiology MH - Genetic Vectors/genetics MH - In Situ Hybridization, Fluorescence MH - Nuclear Transfer Techniques/veterinary MH - Plasmids/*genetics/*physiology OTO - NOTNLM OT - Episome OT - Minicircle OT - Plasmid OT - Scaffold/matrix attachment region OT - Transgenic animals EDAT- 2019/01/30 06:00 MHDA- 2019/09/10 06:00 CRDT- 2019/01/30 06:00 PHST- 2018/09/26 00:00 [received] PHST- 2019/01/18 00:00 [accepted] PHST- 2019/01/30 06:00 [pubmed] PHST- 2019/09/10 06:00 [medline] PHST- 2019/01/30 06:00 [entrez] AID - 10.1007/s11033-019-04624-x [pii] AID - 10.1007/s11033-019-04624-x [doi] PST - ppublish SO - Mol Biol Rep. 2019 Apr;46(2):1737-1746. doi: 10.1007/s11033-019-04624-x. Epub 2019 Jan 29.