Elephants, by having 20 copies of a gene called TP53 (compared to humans & other animals that have just; one copy of this gene), have been found to; rarely get cancer! So Researchers are currently studying how they do this, & expecting that their research, might help them develop new ways to prevent or treat cancer in humans.

• Elephants, despite being very big and living long lives, rarely get cancer. This is surprising, because in humans and many smaller animals, having more cells and living longer usually means more chances for mistakes in DNA, which can lead to cancer.
• Scientists have found that one of the key reasons has to do with a gene called TP53. In most animals (including humans), there is one copy of this gene (so two gene “variants,” one from each parent). Elephants have many more — about 20 copies (so ~40 variants).
• This extra number of copies gives elephants more tools to deal with damaged DNA: when DNA gets damaged in a cell, TP53 helps either fix the damage or, if it’s too bad, make the cell self-destruct so it can’t become cancerous. Elephants’ cells are especially good at doing this.
• Also, elephants have an extra version of another related gene (LIF — leukemia inhibitory factor) including what’s been called a “zombie gene” (a version that was once inactive but regained a working promoter so it can be activated). This helps improve their ability to respond to DNA damage.
• Because of all this, elephants have evolved stronger defenses against cancer. Studying how they do this might help scientists develop new ways to prevent or treat cancer in humans.

For the Scientifically minded !
• The phenomenon is closely tied to Peto’s Paradox, which observes that cancer incidence does not scale linearly with body size and lifespan across species. Large, long‐lived animals (like elephants or whales) should accumulate more somatic mutations simply because of having more cells undergoing divisions over more time, yet they do not exhibit proportionally higher rates of cancer.
• Key molecular insight: elephants have multiple copies of the tumor suppressor gene TP53. Humans have a single copy (two alleles), while elephants have roughly 20 copies (≈40 alleles), which allows for greater redundancy and robustness in the TP53‐mediated DNA damage response.
• Functional consequences:
• Elephant cells are more likely to undergo apoptosis (programmed cell death) upon DNA damage, even in circumstances where human cells might try to repair and survive with mutations. This reduces the risk that damaged cells propagate mutations.
• There is also involvement of duplicated versions or pseudogenes of LIF (leukemia inhibitory factor). One “zombie” version regained functional promoter activity in elephants, so that in the presence of DNA damage, TP53 can activate LIF to amplify apoptosis.
• Evolutionary context: the expansion of TP53 (and activation of LIF duplicates) is thought to be part of the adaptive response in elephants (and their close relatives) to the selective pressures associated with large body size and long lifespan. These animals needed stronger cancer suppression mechanisms to evolve in size and longevity without being overrun by somatic mutation burdens.
• Implications for human health: understanding the biochemical and genetic pathways by which elephants achieve this enhanced tumor suppression might provide novel therapeutic routes — for example, enhancing TP53 pathways, mimicking the multiple‐copy effect, or exploiting LIF‐related apoptosis regulation.

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