Scientists Engineer Advanced Synthetic Cell Exhibiting Growth, Division, and Evolutionary Traits

Researchers at the University of Minnesota have announced the creation of what they describe as their most life-like synthetic cell to date. This laboratory-engineered system, constructed entirely from nonliving elements, demonstrates capabilities such as growth, genetic material replication, division, and the transmission of advantageous characteristics to subsequent generations.

While the team characterizes this achievement as a significant stride in the pursuit of artificial life, they also noted that these synthetic cells are currently unable to survive beyond stringent laboratory environments, necessitating external nourishment and specific components for their growth and division processes.

These initial findings were released as a preprint on bioRxiv, indicating that the research is awaiting formal peer review.

In their published work, the scientists articulated that

One of the most ambitious and fascinating goals of bioengineering is to build a biochemical system that could cross the threshold from chemistry to life.

They emphasized that their research presents

the first minimal cell with a cell cycle, genetically encoded growth and division, all coupled to selection and competition.

Engineering a Mimic of Life

The synthetic cell has been named 'SpudCell' by its creators. Distinct from previous methodologies that often began with existing living organisms, SpudCell was meticulously constructed from precisely defined chemical, nonliving constituents.

Equipped with a 90,000-base-pair genome, SpudCell possesses the capacity to synthesize proteins, duplicate its own DNA, absorb nutrients, expand, and undergo division to form new daughter cells.

Demonstrating Evolutionary Principles

To observe evolutionary dynamics, the research team introduced a specific genetic alteration that conferred a growth advantage to some synthetic cells. Over the course of several generations, these more rapidly growing cells generated a greater number of progeny, consequently increasing their prevalence within the synthetic population, thereby illustrating a fundamental mechanism of natural selection.

The team asserts that this undertaking marks

key milestones towards construction of synthetic life

and holds the potential to establish a groundwork for the creation of

fully artificial organisms

intended for various biotechnology applications.

Current Limitations and Future Horizons

Despite these advancements, the researchers conceded that the synthetic system is considerably less sophisticated than even the most basic living cells. The synthetic cells are unable to persist without controlled laboratory conditions, depend on external nutrient sources and specialized components, and utilize ribosomes extracted from E. coli bacteria. Furthermore, observations revealed that after five generations, approximately 30% of daughter cells did not inherit the complete synthetic genome.

These current limitations underscore that the project has not yet achieved the creation of self-sustaining artificial life. Nevertheless, the scientists contend that their work effectively demonstrates the feasibility of reconstructing numerous fundamental attributes of life from nonliving constituents.

Ethical Considerations

The team also recognized that the development of progressively more advanced synthetic cells could introduce novel biosafety and biosecurity considerations.

In their publication, the authors stated,

This project offers a significant milestone towards evolvability of synthetic cells, making it more likely that more robust, autonomous systems will be available soon.

They further emphasized that this scientific progress

highlights the urgent need to develop a safety and security framework for future synthetic cell engineering.

Looking ahead, the researchers plan to concentrate on enhancing the self-sufficiency of these synthetic cells. This will involve enabling them to regenerate more of their own molecular components, optimizing the distribution of genomes during cell division, and facilitating the spontaneous emergence of mutations rather than relying on researcher intervention.