The present invention provides a method for producing microvesicles comprising a transgene product and/or a lentiviral RNA comprising a transgene, comprising the steps of:culturing a cell into which the transgene has been introduced using a lentiviral vector in vitro to extracellularly release microvesicles comprising the transgene product and/or the lentiviral RNA comprising the transgene, wherein said lentiviral vector is deficient in at least one structural protein gene and comprises the transgene under control of a telomerase reverse transcriptase (TERT) gene promoter in a lentiviral genome sequence, andcollecting the microvesicles released;and a microvesicle obtained accoding to this method and its use.