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The origin and physiological significance of lipid droplets (LDs) in the nucleus is not clear. Here authors show that nucleoplasmic LDs in hepatocytes are derived from apolipoprotein B (ApoB)-free lumenal LDs and constitute a feedback mechanism to regulate PC synthesis in accordance with ER stress.

The original version of this Article contained errors in the Abstract and Introduction, whereby CCTα was incorrectly defined as an abbreviation of CDP-choline diacylglycerol phosphotransferase α, instead of CTP:phosphocholine cytidylyltransferase α. This has now been corrected in both the PDF and HTML versions of the Article.