C - Chemistry – Metallurgy – 12 – N
Patent
C - Chemistry, Metallurgy
12
N
195/1.21, 195/1.
C12N 15/09 (2006.01) C12N 15/00 (2006.01) A61K 39/00 (2006.01)
Patent
CA 1315224
ABSTRACT A replicon, in which a nucleotide sequence encoding a cell killing function is regulatably expressed when the replicon is harboured in one type of host cell (primary host cell), so that cells harbouring the replicon are killed under conditions under which the cell killing function is expressed, and the nucleotide sequence encoding the cell killing function is regulatably or constitutively expressed when the replicon is harboured in another type of host cell (secondary host cell), so that cells harbouring the replicon are invariably killed or killed under conditions under which the cell killing function is expressed, may be used in a method of active biological containment of cells under defined environmental conditions. The biological containment principle may be utilized in the industrial production of a biosynthetic product by recombinant DNA techniques, when deliberately releasing a genetically engineered microorganism to the natural environment or in the preparation of a live vaccine. The expression of the cell killing function may be regulated by means of a promoter.
533121
Andersson Poul Kirketerp
Gerdes Kenn Axo
Klemm Per
Molin Soren
Apovia Ag
Mccarthy Tetrault Llp
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