Its own genetic instructions actively participate in its own feeding
In a Minnesota laboratory, scientists have assembled a chemical system that feeds, grows, copies its genetic material, and divides across generations — yet they stop short of calling it alive. Named SpudCell, this creation was built entirely from non-living components, inverting the usual approach of stripping down existing life to instead build upward from scratch. It is not a living organism, but it is something genuinely new: a working model of life's essential behaviors, assembled from the ground up, that quietly asks what, at its core, life actually requires.
- A synthetic cell-like system built from non-living chemicals is now feeding, growing, replicating DNA, and dividing across multiple generations in a controlled lab setting.
- SpudCell's genome actively directs its own feeding by producing a protein that merges it with nutrient-carrying liposomes — blurring the line between chemistry and biology.
- After five generations, only 30 percent of cells carried a complete genome, exposing a critical gap: inheritance remains unreliable, and true self-sufficiency is still out of reach.
- The team demonstrated selection — a more efficient version of SpudCell outcompeted others — but was careful to clarify this was engineered, not evolved, keeping Darwinian claims at bay.
- The scientific community is watching closely as researchers now face the harder challenge: getting SpudCell to produce its own ribosomes and sustain itself without constant laboratory intervention.
In a University of Minnesota laboratory, researchers have built a system that feeds itself, grows, copies its DNA, and divides into daughter cells — yet they are careful not to call it alive. SpudCell, as they named it, represents a fundamental shift in synthetic biology: rather than starting with a living cell and simplifying it, the team built upward from non-living chemical components alone. The result is a chemically defined, fully inspectable prototype that behaves, in several measurable ways, like a cell.
SpudCell is built around a liposome — a microscopic fatty bubble — containing a small DNA genome and the molecular machinery to read it. Its most striking feature is how it feeds: the genome encodes a membrane protein that acts as a docking hook, enabling SpudCell to merge with externally supplied feeder liposomes and absorb the enzymes, lipids, and molecules it needs to grow. Its own genetic instructions actively participate in its own sustenance — a link between code and behavior that has drawn significant scientific attention.
Over five successive generations, SpudCell fed, grew, replicated its DNA, and divided. Early rounds required mechanical assistance to divide, but later experiments showed division driven by proteins the cell produced itself. A built-in generation counter confirmed the lineage. Still, only 30 percent of cells retained a complete genome after five generations, revealing that reliable inheritance remains an unsolved problem.
The researchers also demonstrated selection: a more efficient variant of SpudCell outgrew and outreproduced others over time. But they are explicit that this is not Darwinian evolution — the advantageous change was deliberately introduced, not spontaneously generated. True open-ended evolution has not yet emerged.
SpudCell is best understood as a powerful proof of concept rather than a living organism. It cannot produce its own ribosomes, depends entirely on lab conditions, and lacks the internal organization of natural cells. But it shows that several hallmarks of life can arise when non-living components are assembled correctly — offering a new platform for understanding both how life works and how it may have first begun.
In a laboratory at the University of Minnesota, researchers have assembled something that feeds itself, grows larger, copies its own genetic material, and divides into daughter cells—yet they are careful not to call it alive. The creation, named SpudCell, represents a fundamental shift in how scientists approach the question of what life actually is. Rather than starting with a living cell and stripping it down to its bare essentials, the team built upward from scratch, using only non-living chemical components to construct a system that behaves, in several measurable ways, like a cell.
SpudCell consists of a fatty outer membrane called a liposome—essentially a microscopic bubble—containing a small DNA genome and the molecular machinery required to read that genetic code. The researchers know precisely what went into the system and in what quantities, making it what they call "chemically defined." This is fundamentally different from a natural cell, which is the product of billions of years of evolution and contains vastly more complexity. SpudCell is a stripped-down model that scientists can disassemble, examine, modify, and rebuild. The work has been posted as a preprint and awaits formal peer review, but the implications are already drawing attention from the scientific community.
The most striking aspect of SpudCell is how it obtains the resources it needs to survive. It does not eat in any conventional sense. Instead, the researchers supply it with what they call "feeder liposomes"—tiny packets containing enzymes, ribosomes, small molecules, and lipids. But here is where the system becomes genuinely interesting: SpudCell's DNA contains instructions for producing a membrane protein that acts like a docking hook. When this protein encounters the feeder liposomes, it facilitates a merger. Through this process, SpudCell receives the supplies and membrane material it needs to grow. The cell is not passively refilled from outside; its own genetic instructions actively participate in its own feeding. This link between genetic code and cell-like behavior is one reason the work has captured scientific imagination.
The researchers demonstrated that SpudCell could sustain itself through five successive generations. In each cycle, the cells were fed, grew larger, copied their DNA, and divided. Early generations required mechanical assistance from laboratory membrane filters to divide, but later experiments showed that the cells could divide through proteins they produced themselves—a process the researchers describe as genetically encoded division without the internal scaffolding that natural cells use. The newly created DNA was detected after each generation, and researchers used a "generation counter" to confirm that the same cell line had completed repeated rounds of feeding and reproduction. Notably, after five generations, only 30 percent of the analyzed cells contained the complete genome, indicating that inheritance remains imperfect and unreliable compared to natural cells.
One of the most significant claims in the SpudCell research concerns selection. The team created a version of the cell that was more efficient at feeding. Because it fed better, it grew better. Because it grew better, it produced more daughter cells. Over several generations, this superior version became more prevalent in the population. However, the researchers are explicit that this is not Darwinian evolution. The useful change was deliberately introduced by the scientists themselves; it did not arise spontaneously within the synthetic cell population. True evolution would require beneficial mutations to emerge naturally and then spread. SpudCell demonstrates selection, but not the open-ended evolutionary process that characterizes living organisms.
The question of whether SpudCell is alive has no simple answer, and the researchers themselves do not claim to have created life. There is, after all, no universally agreed-upon definition of what life actually is. SpudCell performs several behaviors commonly used to distinguish living things from inert matter: it feeds, grows, replicates its genome, divides, and undergoes selection. Yet it remains vastly simpler than any natural cell. It is not self-sufficient. It depends entirely on carefully controlled laboratory conditions and regular external supplies. It cannot yet manufacture its own ribosomes, and its metabolism is severely limited. It also lacks the internal organization that allows natural cells to reliably divide their contents between daughter cells. For these reasons, SpudCell is best understood as a major prototype—a proof of concept—rather than as a living organism.
The history of artificial-cell research extends back decades. In 1957, Canadian scientist Thomas Ming Swi Chang reported the creation of artificial cells using ultrathin polymer membranes, work that opened an entire field and later led to medical applications. More recently, the J. Craig Venter Institute created a synthetic bacterial cell in 2010 and later developed a minimal synthetic bacterial cell with 531,000 base pairs and 473 genes. But that work began with existing living cellular machinery and stripped it down. SpudCell's approach is inverted: it starts with non-living components and builds upward. The next phase of research will require SpudCell to become more self-sufficient, producing more of its own machinery, particularly ribosomes, and developing more reliable mechanisms for dividing and passing DNA to daughter cells. What SpudCell demonstrates is that several hallmarks of living systems can emerge when non-living components are assembled correctly—a powerful platform for understanding how life works and how it may have originated.
Citas Notables
SpudCell is not being presented as life created in a lab. Not yet. But it is an important step in understanding which parts and processes are needed for something lifelike to begin.— University of Minnesota researchers
SpudCell demonstrates that several hallmarks of living systems can emerge when non-living components are assembled correctly, providing a powerful platform for studying how life works and how it may have begun.— Research team
La Conversación del Hearth Otra perspectiva de la historia
Why does it matter that they built it from non-living parts rather than starting with a living cell and removing things?
Because it tells us something different about what's necessary. When you strip down a living cell, you're always working within the constraints of what evolution built. Starting from scratch, from chemicals alone, shows us which functions can emerge from simpler routes. It's like the difference between reverse-engineering a car and building one from raw materials.
But it still needs the researchers to feed it constantly. How is that different from a chemistry experiment in a beaker?
The difference is that SpudCell's own DNA is actively involved in getting those supplies. The cell produces a protein that docks with the feeder packets. It's not passive. The genetic instructions are participating in the cell's own survival, which is a hallmark of life.
They mention that only 30 percent of cells after five generations had the complete genome. That sounds like a failure.
It's a limitation, yes, but it's also revealing. It shows us that natural cells have solved a problem SpudCell hasn't yet—reliable inheritance. That's something future versions need to address. But it also suggests that life doesn't require perfect copying to persist.
The selection they demonstrated—where the better-feeding version became more common—they say that's not evolution. Why not?
Because the improvement was engineered in by the researchers. Evolution requires useful changes to arise spontaneously within the population and then spread. SpudCell shows that selection can happen, but without the open-ended creativity that makes evolution powerful.
So what's the real significance here? Are we closer to creating life?
We're closer to understanding what the minimum requirements for life-like behavior actually are. SpudCell shows that you don't need a cytoskeleton, or independent metabolism, or perfect inheritance. You need feedback between genetic instructions and behavior. That's the insight that matters.