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NewsScientists have developed a new bioprinting method that successfully replicates mature human fat tissue in 3D. Using an agarose support bath and a gellan gum bioink, the technique keeps delicate fat cells alive and functional — a major step toward better lab models for studying obesity, diabetes, and metabolic disorders, and for testing drugs and cosmetics.
Scientists at the University of Stuttgart have cracked a long-standing challenge in tissue engineering: printing mature human fat cells (adipocytes) into stable, 3D structures without destroying them. Their new support-bath bioprinting method uses a chilled agarose gel bath to hold delicate fat cells in place during printing, paired with a low-concentration gellan gum bioink that keeps cells viable and functional.
Why is this hard? Mature adipocytes are notoriously tricky — they're large, buoyant, and sensitive to mechanical stress, making them prone to damage during conventional bioprinting. Most existing 3D fat models rely on stem cells instead, which are less physiologically accurate.
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Why it matters: Realistic human fat tissue models could transform how researchers study obesity, insulin resistance, and type 2 diabetes — reducing reliance on animal models and enabling more accurate drug and cosmetic testing. This technique lays the groundwork for more complex, vascularized constructs with future regenerative medicine applications.