I recently read this non-peer reviewed article that states that the prevalence of cancer in crocodiles or elephants is really low, much lower than humans. It is said below
A team of researchers in the US looked closer, and found an abundance of a gene called TP53. This gene is known for its ability to repair damaged DNA and thus halt the spread of cancer, and it's some 20 times more common in elephants than it is in human beings. It appears elephants have developed more of these genes as they've evolved, in part to protect calves born to older mothers
"These findings, if replicated, could represent an evolutionary-based approach for understanding mechanisms related to cancer suppression," says the report, published in the Journal of the American Medical Association.
Naked mole rats are even more miraculous - they never develop cancer, even when scientists try and induce it artificially. What appears to be happening, at least according to a recent study, is that the mole rats are using natural mechanisms to clamp down on the spread of cancer and fight back against the mutation.
So why is it that these genes cannot be transferred from animals to humans? Maybe when the baby is at fetus stage? What are the current problems/limitations and if possible, how would scientists transfer these genes? My logic is that since mice and elephants are both mammals, it should not be too hard to achieve this.