Vector utilizing borna disease virus and use thereof

A viral vector comprising

• (a) a cDNA of a recombinant viral RNA
• having at least the N gene, the X gene, the P gene, and the L gene of a Borna disease virus genome in the same order as that in the Borna disease virus genome,
• having a sequence in which a foreign gene is inserted into the untranslated region connected to the downstream of the open reading frame of the P gene,
• containing restriction enzyme sites both at the 3′ end and at the 5′ end of the foreign gene,
• containing the sequences shown in SEQ ID NO:
• 11 both in the region between the restriction enzyme site at the 3′ end of the foreign gene and the open reading frame of the P gene;
• and in the region between the restriction enzyme site at the 5′ end of the foreign gene and the open reading frame of the L gene, or the region between the restriction enzyme site at the 5′ end of the foreign gene and the open reading frame of the M gene when the M gene of the Borna disease viral genome is contained in the same order as that in the Borna disease viral genome, and
• containing at least a base sequence cc inserted in the region between the restriction enzyme site at the 3′ end of the foreign gene and the sequence shown in SEQ ID NO:
• 11, and at least a base sequence cc in the region between the restriction enzyme site at the 5′ end of the foreign gene and the sequence shown in SEQ ID NO:
• 11
• (b) a DNA encoding a ribozyme, and
• (c) a promoter sequence,
• each being disposed in a position in which (b) is placed upstream and downstream of (a), and (a) and (b) are placed downstream of (c).