Publications by authors named "S F Tessier"

Inflammation significantly influences cellular communication in the oral environment, impacting tissue repair and regeneration. This study explores the role of small extracellular vesicles (sEVs) derived from lipopolysaccharide (LPS)-treated stem cells from the apical papilla (SCAP) in modulating macrophage polarization and osteoblast differentiation. SCAPs were treated with LPS for 24 h, and sEVs from untreated (SCAP-sEVs) and LPS-treated SCAP (LPS-SCAP-sEVs) were isolated via ultracentrifugation and characterized using transmission electron microscopy, Western blot, and Tunable Resistive Pulse Sensing.

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Preserving organs at subzero temperatures with halted metabolic activity holds the potential to prolong preservation and expand the donor organ pool for transplant. Our group recently introduced partial freezing, a novel approach in high-subzero storage at -15 °C, enabling 5-day storage of rodent livers through precise control over ice nucleation and unfrozen fraction. However, increased vascular resistance and tissue edema suggested a need for improvements to extend viable preservation.

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Article Synopsis
  • Earth's biodiversity is at risk, prompting the proposal of a passive lunar biorepository to store live cryopreserved samples to protect it and aid future space missions.
  • The project will focus initially on cryopreserving animal skin samples with fibroblast cells, starting with fish fins from the Starry Goby as a test case.
  • Key challenges include minimizing radiation damage and maintaining temperatures around -196° Celsius, with potential lunar sites near the poles being ideal for storage, and preliminary tests are planned on the International Space Station.
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Background: The number of patients waiting for heart transplant far exceeds the number of hearts available. Donation after circulatory death (DCD) combined with machine perfusion can increase the number of transplantable hearts by as much as 48%. Emerging studies also suggest machine perfusion could enable allograft "reconditioning" to optimize outcomes.

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