| Dec 31, 2021 |
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(Nanowerk Information) A brand new method takes bioprinting — during which an ink of cells is printed, layer by layer, to kind a construction — to a complete new, and icy degree. Investigators from the Zhang lab at Brigham and Ladies’s Hospital have developed a expertise that they time period ‘cryobioprinting’, a technique that makes use of a bioink embedded with cells to print frozen, complicated constructions that may be simply saved for later use.
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The staff launched cryobioprinting in a paper not too long ago printed in Matter (“Freeform Cell-Laden Cryobioprinting for Shelf-ready Tissue Fabrication and Storage”) and additional described the right way to apply the expertise to muscular tissue engineering in a paper simply printed in Superior Supplies (“Help Bathtub-Free Vertical Extrusion Cryo(bio)printing for Anisotropic Tissue Manufacturing”).
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| Cryobioprinting examples. (Picture: Y. Shrike Zhang)
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“Cryobioprinting can provide bioprinted tissue an prolonged shelf life. We confirmed as much as three months of storage, however it might be for much longer,” mentioned Y. Shrike Zhang, PhD, senior writer of each papers and an affiliate bioengineer within the Brigham’s Division of Drugs. “And the distinctive variation, or what we name the vertical 3D cryobioprinting method we’ve described, could have broad software in tissue engineering, regenerative drugs, drug discovery and customized therapeutics.”
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Zhang and colleagues used a cryoprotected bioink laden with cells to print tissue constructs on a custom-made freezing plate. The freezing plate allowed them to exactly management and stabilize temperature in the course of the cryobioprinting process. These printed constructions had been instantly cryopreserved in a liquid nitrogen tank for later use. The staff optimized and evaluated the method, discovering that it might faithfully fabricate tissue constructs that would doubtlessly be used as implants and tissue merchandise.
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In Superior Supplies, Zhang and co-authors report on utilizing the cryoprotected bioink to create vertical, 3D constructions that mimic complicated, delicate, and anisotropic tissues discovered within the human physique. Many tissues within the physique, together with muscle groups and neurons, are anisotropic, which means that they’ve properties which can be totally different in several instructions. The constructions the researchers created had been additionally anisotropic, with microscale pores aligned within the vertical course.
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As a proof-of-concept, the staff constructed a muscle-tendon unit utilizing myoblasts (cells that can provide rise to muscle cells) and fibroblasts (cells that produce structural frameworks in connective tissue). The staff additionally fabricated a muscle-microvascular unit.
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The researchers be aware that this work represents very early technological demonstrations and can nonetheless want intensive validation and assessments earlier than use within the clinic, however the two papers characterize an necessary step ahead.
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“As the sector of tissue engineering is rising quick, these fabricated tissue constructs could discover a plethora of purposes in muscular tissue engineering and past,” mentioned Zhang.
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