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Extracellular vesicles from the microalga Tetraselmis chuii are biocompatible and exhibit unique bone tropism along with antioxidant and anti-inflammatory properties.

Giorgia Adamo | Pamela Santonicola | Sabrina Picciotto | Paola Gargano | Aldo Nicosia | Valeria Longo | Noemi Aloi | Daniele P Romancino | Angela Paterna | Estella Rao | Samuele Raccosta | Rosina Noto | Monica Salamone | Irene Deidda | Salvatore Costa | Caterina Di Sano | Giuseppina Zampi | Svenja Morsbach | Katharina Landfester | Paolo Colombo | Mingxing Wei | Paolo Bergese | Nicolas Touzet | Mauro Manno | Elia Di Schiavi | Antonella Bongiovanni
Communications biology | 2024

Extracellular vesicles (EVs) are membrane-enclosed bio-nanoparticles secreted by cells and naturally evolved to transport various bioactive molecules between cells and even organisms. These cellular objects are considered one of the most promising bio-nanovehicles for the delivery of native and exogenous molecular cargo. However, many challenges with state-of-the-art EV-based candidates as drug carriers still exist, including issues with scalability, batch-to-batch reproducibility, and cost-sustainability of the final therapeutic formulation. Microalgal extracellular vesicles, which we named nanoalgosomes, are naturally released by various microalgal species. Here, we evaluate the innate biological properties of nanoalgosomes derived from cultures of the marine microalgae Tetraselmis chuii, using an optimized manufacturing protocol. Our investigation of nanoalgosome biocompatibility in preclinical models includes toxicological analyses, using the invertebrate model organism Caenorhabditis elegans, hematological and immunological evaluations ex vivo and in mice. We evaluate nanoalgosome cellular uptake mechanisms in C. elegans at cellular and subcellular levels, and study their biodistribution in mice with accurate space-time resolution. Further examination highlights the antioxidant and anti-inflammatory bioactivities of nanoalgosomes. This holistic approach to nanoalgosome functional characterization demonstrates that they are biocompatible and innate bioactive effectors with unique bone tropism. These findings suggest that nanoalgosomes have significant potential for future therapeutic applications.

Pubmed ID: 39097626

Associated grants

  • Agency: NIH HHS, United States
    Id: P40 OD010440
  • Agency: EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020),
    Id: 801338
  • Agency: EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020),
    Id: 952183
  • Agency: AFM-Téléthon (French Muscular Dystrophy Association),
    Id: 24401

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This is a list of tools and resources that we have found mentioned in this publication.


Promega (tool)

RRID:SCR_006724

An Antibody supplier

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Thermo Fisher Scientific (tool)

RRID:SCR_008452

Commercial vendor and service provider of laboratory reagents and antibodies. Supplier of scientific instrumentation, reagents and consumables, and software services.

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Sigma-Aldrich (tool)

RRID:SCR_008988

American chemical, life science and biotechnology company owned by Merck KGaA. Merger of Sigma Chemical Company and Aldrich Chemical Company. Provides organic and inorganic chemicals, building blocks, reagents, advanced materials and stable isotopes for chemical synthesis, medicinal chemistry and materials science, antibiotics, buffers, carbohydrates, enzymes, forensic tools, hematology and histology, nucleotides, proteins, peptides, amino acids and their derivatives.

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Caenorhabditis Genetics Center (tool)

RRID:SCR_007341

Center that acquires, maintains, and distributes genetic stocks and information about stocks of the small free-living nematode Caenorhabditis elegans for use by investigators initiating or continuing research on this genetic model organism. A searchable strain database, general information about C. elegans, and links to key Web sites of use to scientists, including WormBase, WormAtlas, and WormBook are available.

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BALB/cAnNCrl (tool)

RRID:MGI:2683685

laboratory mouse with name BALB/cAnNCrl from MGI.

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RT476 (organism)

RRID:WB-STRAIN:WBStrain00033476

Caenorhabditis elegans with name unc-119(ed3) III; pwIs170. from WB.

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EG1285 (organism)

RRID:WB-STRAIN:WBStrain00006667

Caenorhabditis elegans with name lin-15B&lin-15A(n765) oxIs12 X. from WB.

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N2 (organism)

RRID:WB-STRAIN:WBStrain00000001

Caenorhabditis elegans with name Caenorhabditis elegans wild isolate. from WB.

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VC2405 (organism)

RRID:WB-STRAIN:WBStrain00037310

Caenorhabditis elegans with name chc-1(ok2369) III/hT2 [bli-4(e937) let-?(q782) qIs48] (I;III). from WB.

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CL2166 (organism)

RRID:WB-STRAIN:WBStrain00005102

Caenorhabditis elegans with name dvIs19 [(pAF15)gst-4p::GFP::NLS] III. from WB.

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RT1315 (organism)

RRID:WB-STRAIN:WBStrain00033482

Caenorhabditis elegans with name unc-119(ed3) III; pwIs503. from WB.

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