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Cell 'Snowball' Revolutionizes Tissue Engineering
New biohybrid spheroids could enable large-scale tissue engineering and organ biofabrication.
Apr. 7, 2026 at 5:44am
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Innovative biohybrid cell spheroids could revolutionize tissue engineering by enabling large-scale fabrication of complex biological structures.Penn State Erie TodayResearchers at Penn State have developed a new technology called biohybrid spheroids - a mixture of living cells and microgels - that can rapidly self-assemble or 'snowball' in size while still allowing oxygen and nutrients to reach the cells inside. This addresses key limitations of traditional cell spheroids used in tissue engineering, paving the way for commercial-scale tissue fabrication and organ biofabrication.
Why it matters
Cell spheroids, 3D versions of cell cultures, are an important tool for modeling real tissue and advancing biological research. However, current spheroids face challenges with nutrient and oxygen delivery, limiting their size and function. The new biohybrid spheroid technology developed at Penn State could help overcome these limitations and enable more realistic tissue models and large-scale tissue engineering applications.
The details
The biohybrid spheroids are created by mixing living cells with microgels, tiny materials that mimic the supportive extracellular matrix found in the body. This allows the spheroids to rapidly self-assemble or 'snowball' in size while still enabling oxygen and nutrients to reach the inner cells. Traditional cell spheroids struggle with these issues, as the outer layer blocks delivery of essential compounds to the core.
- The research was published in the journal Advanced Science in April 2026.
The players
Amir Sheikhi
An associate professor and Dorothy Foehr Huck and J. Lloyd Huck Early Career Chair in Biomaterials and Regenerative Engineering at Penn State.
Penn State
The university where the biohybrid spheroid technology was developed.
National Heart, Lung, and Blood Institute of the National Institutes of Health
The organization that partially funded the research.
What they’re saying
“Cell spheroids, 3D versions of cell cultures built using a process known as cell aggregation, are the next step in advancing this work, capable of more closely modeling real tissue.”
— Amir Sheikhi, Associate Professor, Penn State
What’s next
The team plans to further develop the biohybrid spheroids to more closely mimic the properties of real tissue, with the goal of enabling commercial-scale tissue engineering and organ biofabrication.
The takeaway
This new biohybrid spheroid technology represents a significant advancement in tissue engineering, overcoming key limitations of traditional cell spheroids and paving the way for more realistic tissue models and large-scale fabrication of engineered tissues and organs.
