Turning off the preprogrammed cell death (
apoptosis) genes will not make you immortal, it will give you
CANCER. Cancer is what happens when these genes fail. Cancer tumors are
immortal, but I wouldn't want to be one. They are nothing but
uncooperative lumps of cells. All muticellular organisms more complicated than amoebas have these
apoptosis genes for a reason. They enforce cooperation between various cell types and
organs.
In order to have any hope at immortality, it will require continually
repairing all the errors that all your cells make in
replication. That is what cancer is, the sum total of everything
bad you ever did to yourself in your life. That cup of
coffee you drank this morning, that time you worked on a
model plane when you were 12, and
inhaled all that model
glue. The mutations slowly add up, and when one cell gets mistreated a bit too much...