Oncolytic adenoviruses armed with heterologous genes
The present disclosure relates to a group B adenovirus comprising a sequence of formula (I): 5′ITR-B1-BA-B2-BX-BB-BY-B3-3′ITR wherein: B1 is bond or comprises: E1A, E1B or E1A-E1B; BA comprises-E2B-L1-L2-L3-E2A-L4; B2 is a bond or comprises: E3; BX is a bond or a DNA sequence comprising: a restriction site, one or more transgenes or both; BB comprises L5; BY is a bond or a DNA sequence comprising: a restriction site, one or more transgenes or both; B3 is a bond or comprises: E4; wherein at least one of BX or BY is not a bond, pharmaceutical compositions comprising the same and use of the viruses and compositions in treatment, particularly in the treatment of cancer. The disclosure also extends to plasmids and processes employed to prepare the said viruses.
1. A plasmid comprising a p15A bacterial origin of replication, a kanamycin resistance gene, and an Enadenotucirev genome sequence comprising an L5 gene and a DNA sequence comprising one or more unique restriction sites inserted in a region located at the 3′ end of the L5 gene, wherein the region comprises SEQ ID NO: 11 and the DNA sequence is comprised between nucleotides 12 and 13 in SEQ ID NO: 11 or between a place corresponding to nucleotides 29356 and 29357 in SEQ ID NO: 12.
2. The plasmid according to claim 1 , wherein the region is joined directly to a base of L5 which represents the end of a coding or non-coding sequence of L5.
3. The plasmid according to claim 1 , wherein the Enadenotucirev genome sequence comprises SEQ ID NO: 12.
4. The plasmid according to claim 1 , wherein the DNA sequence comprises SEQ ID NO: 54.
5. The plasmid according to claim 1 , wherein the plasmid comprises SEQ ID NO: 64.
6. The plasmid according to claim 1 , wherein the DNA sequence comprises one or two restriction sites and at least one transgene.
7. The plasmid according to claim 6 , wherein the DNA sequence comprises one or two restriction sites and two transgenes.
8. The plasmid according to claim 1 , wherein the plasmid comprises SEQ ID NO: 65.
9. A method of producing an adenovirus comprising a transgene cassette inserted after the L5 gene, the method comprising introducing the plasmid according to claim 1 into a host cell, wherein the adenovirus is Enadenotucirev.
10. An adenovirus obtained by the method of claim 9 , wherein the adenovirus is Enadenotucirev.