The biotech company Colossal Biosciences has made headlines with its latest creation: the woolly mouse. This lab-born animal boasts shaggy, mammothlike fur and cold-adapted traits, such as the ability to store and burn fat efficiently. Researchers at Colossal achieved this by retrieving and sequencing ancient mammoth DNA from preserved skin, bone, and hair. By altering specific genes in lab mice, they were able to mimic mammoth traits in the rodents’ genome.
While the woolly mouse may seem like a small step compared to the grand goal of bringing back the woolly mammoth, Colossal believes that genetic engineering can help save endangered species by making them more resilient. Additionally, the company claims that resurrecting extinct species like the mammoth could have a positive impact on the environment. For instance, mammoths could potentially help combat climate change by preventing Arctic permafrost from thawing and releasing methane into the atmosphere.
Despite Colossal’s ambitious plans, many experts remain skeptical. Some argue that rewilding poses risks, as reintroduced species may come into conflict with humans or fall victim to predators and poachers. Others question the feasibility of using gene editing to address complex ecological problems like habitat loss and climate change.
The creation of the woolly mouse is just one milestone in Colossal’s larger mission to de-extinct species. The company, founded in 2021 by tech entrepreneur Ben Lamm and Harvard biologist George Church, has previously announced the successful creation of elephant stem cells, which could be used to clone elephant-mammoth hybrids in the future.
Colossal’s chief science officer, Beth Shapiro, describes the woolly mouse as an important step towards resurrecting traits lost to extinction. By targeting specific genes in the mouse genome, the researchers were able to produce mice with mammothlike hairs, patterns, and colors. These genetic modifications also included alterations to lipid metabolism to create cold-adapted traits in the mice.
While the creation of the woolly mouse is a scientific achievement, it raises ethical concerns. Gene editing can have a high failure rate, resulting in harm to surrogates and offspring. Additionally, there are concerns about the potential impact of a genetically modified mouse escaping from the lab and mating with wild populations.
As Colossal continues its work towards de-extinction, the ethical and biological implications of their research remain a topic of debate among scientists and ethicists. The woolly mouse may be a fascinating creation, but the larger question of whether bringing back extinct species is truly beneficial for conservation and the environment is still up for discussion. In a recent interview, Zhou expressed some concerns about the potential risks associated with manipulating ancient DNA in live mice. He pointed out that predicting the function of ancient DNA in a living organism can be challenging and may have unforeseen consequences.
Geneticist Shapiro, on the other hand, emphasized that genetic mutations occur naturally during reproduction and most of them have no significant impact. However, she acknowledged the need for caution when selecting genetic variations that are intended to alter the organism’s appearance or behavior. The company’s approach involves thoroughly evaluating the effects of genetic edits before implementing them. It is worth noting that all engineered mice born so far are male, and there are no plans for breeding them.
The ethical implications of manipulating the genetic makeup of mice, or potentially woolly mammoths in the future, raise important questions. Some experts, like Panciroli, liken the situation to the cautionary tale of “Jurassic Park,” highlighting the need for a valid reason to interfere with nature. Moreover, reintroduced animals, including elephants, could be targeted by poachers, posing a threat to conservation efforts.
Craig Callender, a professor of philosophy specializing in science ethics, believes that the ability to control traits through genetic modifications could be a valuable tool. However, he questions the inherent value of projects like resurrecting mammoths. The debate surrounding the ethical implications of gene editing is likely to divide the scientific community.
In response to criticism, Shapiro defends the company’s work by highlighting the positive impact it has on inspiring future scientists and raising awareness about biodiversity conservation. She argues that gene editing can complement traditional conservation methods, especially in addressing rapid habitat changes and genetic diseases in endangered species.
Despite these arguments, some conservationists, like Sue Lieberman and George Schaller, remain skeptical of genetic manipulation for creating novelty organisms. Lieberman criticizes the allocation of resources towards creating unusual animals for entertainment purposes, instead of investing in essential conservation efforts. Schaller emphasizes the importance of protecting existing biodiversity rather than focusing on creating genetically modified species.
Overall, the debate surrounding the ethics and practicality of genetic engineering in conservation remains complex and contentious. As advancements in genetic technology continue to evolve, it is crucial to consider the long-term implications and ethical considerations of altering the genetic makeup of living organisms.
