Word: neomycin
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Dates: during 1980-1989
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That is where gene transplants come in. Anderson has developed a technique using a "marker" that will let Rosenberg follow the progress of the TILs. The marker is the E. coli gene that makes a cell resistant to the antibiotic neomycin. Anderson has been able to tuck that bacterial gene into a virus and then implant the virus into TILs. Once inside the TILs, the gene becomes fully functional...
...upcoming experiment, Rosenberg plans to inject ten terminally ill patients with TILs carrying the marker. Periodically, he will remove bits of tumor from the subjects and douse the samples in neomycin. If some cells survive the dosing, he will know the TILs have reached the tumor...