To overexpress circ-ATXN2, we used the pLC5-ciR-GFP (#GS0108) vector (Geneseed, Guangzhou, China). We inserted the full-length circ-ATXN2 (chr12: 40329454-40335680) into the pLC5-ciR-GFP vector between the restriction sites. Thereafter, the vector was packaged into the lentivirus and infected into rat ASCs (Sun et al., 2020 (link)). The vector-GFP- and circ-ATXN2–GFP-expressing cells were sorted for subsequent experiments using a Moflo AstriosEQ flow cytometer (Beckman Coulter, United States).
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