The present invention relates to an integration-defective lentiviral vector (IDLV) comprising a
nucleic acid, the said
nucleic acid comprising, between a 5′ LTR sequence and a 3′ LTR sequence, at least one
nucleus export signaling sequence; at least one
nucleic acid sequence of interest; and at least one
nuclease site. The invention further relates to an
isolated cell comprising said IDLV, a pharmaceutical composition comprising said IDLV or said
isolated cell, and their pharmaceutical use in the treatment of a
disease selected from the group consisting of immune diseases, viral infections, tumors and blood diseases; and / or a
disease caused by the lack of a
protein or by the presence of an aberrant non-functional one in an individual in need thereof.