Lentivirus preparation and B cell transduction were described previously.59 (link) Briefly, 293T cells were cotransfected with psPax2 plasmid (Addgene), VSVG plasmid (Addgene), siControl plasmid, siHSP70 plasmid or siHSF1 plasmid (ABM, Richmond, BC, Canada), lenti-EV (empty vector) or lenti-HSP70 overexpression plasmid (Sinobiological) using Lipofectamine 2000 (Thermo Fisher). Supernatants were collected and filtered. Isolated bone marrow B cells were transduced by lentiviral particles by spin infection.
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