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Exosomes

Exosomes are small membrane vesicles of endocytic origin secreted by most cell types in vitro. Cells continuously secrete a large number of microvesicles, exosomes and small molecules into the extracellular space. Exosomes have been shown to contain mRNA and miRNA and they are able to mediate communication between cells, by transport of RNA and proteins which can be functionalized in the recipient cell. The ability to transport bioactive cargoes, gives exosomes innate therapeutic potential as a natural drug carrier. Efficient techniques for loading drugs into exosomes to utilize the natural carrier capabilities of these vesicles remains to be elucidated.

Applications of Exosomes

The presence exosomes in blood, saliva, and urine paves the way for the possible application of exosomes as a diagnostic marker for diseases. Many diseases are difficult to detect by the methods and equipment available today and there is a growing demand for development of new non‐invasive methods to detect diseases in early stages. The use of exosomes as markers of disease is being investigated to cement their potential as a non-invasive diagnostic tool for early detection of many diseases, in particular cancers. This, however, relies on thorough characterisation of exosomes in both healthy and diseased states

An important factor to understanding the roles of exosomes is knowledge of their biodistribution. Currently, the number of publications describing the biodistribution of exosomes is limited. The main reason being the lack of a robust fluorescent label that can be visualised in vivo. Mapping the specific cell type derived exosomes can increase our knowledge on the roles of exosomes in the organism, as well as help to identify natural targeting systems.

Isolation, Characterisation and Fluorescent Labelling

The most common isolation protocol uses a differential centrifugation to fractionate cells, microvesicles, and exosomes, which are pelleted by ultracentrifugation. After vesicles are secreted from cells into the extracellular environment, it difficult to separate the different subpopulations of vesicles to obtain a pure sample. We have developed methods to optimise isolation and thorough characterisation procedures to obtain pure and well-characterised exosomes. Furthermore, we have developed a simple method for labelling of exosomes with a robust fluorescent label that can be visualised in vivo, allowing investigation of the biodistribution of different cell derived exosomes.

Collaborators:

Department of Clinical Medicine, Aarhus University Hospital, Denmark

Dan Peer, Department of Cell Research & Immunology, Tel Aviv University, Israel

Moein Moghimi, school of Medicine, Pharmacy and Health, Durham University, UK

Recent Publications

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Broersen, LHA, Pereira, AM, Jørgensen, JOL & Dekkers, OM 2015, 'Response to the Letter by Lindholm, et al', Endocrinology, vol. 100, no. 8, pp. L66-7. https://doi.org/10.1210/JC.2015-2827
Liew, Z, Olsen, J, Cui, X, Ritz, B & Arah, OA 2015, 'Response to Werler and Parker letter: Comment on live-birth bias in pregnancy cohorts', International Journal of Epidemiology, vol. 44, no. 3, pp. 1080-1. https://doi.org/10.1093/ije/dyv140
Davies, SR & Horst, M 2015, Responsible Innovation in the US, UK and Denmark: Governance Landscapes. in B-J Koops, I Oosterlaken, H Romijn, T Swierstra & J van den Hoven (eds), Responsible Innovation 2: Concepts, Approaches, and Applications. Springer, pp. 37-56. https://doi.org/10.1007/978-3-319-17308-5_3
Horst, CE & Tireli, Ü 2015, Ressourcebegrebet i en interkulturel pædagogisk sammenhæng. in T Ritchie (ed.), Ressourcer i teori og praksis: en brugsbog for pædagoger. 1. edn, Billesøe og Baltzer, Værløse, pp. 195-214.
Möllers, J & Oshima, Y 2015, 'Restriction of most degenerate representations of O(1,N) with respect to symmetric pairs', J. Math. Sci. Univ. Tokyo, vol. 22, no. 1, pp. 279-338.
Mastretta-Yanes, A, Arrigo, N, Alvarez, N, Jorgensen, TH, Piñero, D & Emerson, BC 2015, 'Restriction site-associated DNA sequencing, genotyping error estimation and de novo assembly optimization for population genetic inference', Molecular Ecology Resources, vol. 15, no. 1, pp. 28-41. https://doi.org/10.1111/1755-0998.12291
Erdem, H, Cag, Y, Ozturk-Engin, D, Defres, S, Kaya, S, Larsen, L, Poljak, M, Barsic, B, Argemi, X, Sørensen, SM, Bohr, AL, Tattevin, P, Damsgaard Gunst, J, Baštáková, L, Jereb, M, Johansen, IS, Karabay, O, Pekok, AU, Sipahi, OR, Chehri, M, Beraud, G, Shehata, G, Del Vecchio, RF, Maresca, M, Karsen, H, Sengoz, G, Sunbul, M, Yilmaz, G, Yilmaz, H, Sharif-Yakan, A, Kanj, SS, Parlak, E, Pehlivanoglu, F, Korkmaz, F, Komur, S, Kose, S, Ulug, M, Bolukcu, S, Coskuner, SA, Ince, N, Akkoyunlu, Y, Halac, G, Sahin-Horasan, E, Tireli, H, Kilicoglu, G, Al-Mahdawi, A, Nemli, SA, Inan, A, Senbayrak, S, Stahl, JP & Vahaboglu, H 2015, 'Results of a multinational study suggest the need for rapid diagnosis and early antiviral treatment at the onset of herpetic meningoencephalitis', Antimicrobial Agents and Chemotherapy, vol. 59, no. 6, pp. 3084-9. https://doi.org/10.1128/AAC.05016-14
Hartvig, P, Jespersen, H, Lindberg, V, Sørensen, S, Madsen, L, Sørensen, J & Zielinski, M 2015, Results of the testing of herbicides, growth regulators and desiccants in agricultural crops and herbicides in horticultural crops 2014. in LN Jørgensen, BJ Nielsen, PK Jensen, P Kudsk, SK Mathiassen, P Hartvig & M Kristensen (eds), Applied Crop Protection 2014. DCA - Nationalt Center for Fødevarer og Jordbrug, DCA rapport, no. 058, pp. 138-140. <http://web.agrsci.dk/djfpublikation/index.asp?action=show&id=1197>
Winther-Jensen, M, Kjaergaard, J, Hassager, C, Bro-Jeppesen, J, Nielsen, N, Lippert, FK, Køber, L, Wanscher, M & Søholm, H 2015, 'Resuscitation and post resuscitation care of the very old after out-of-hospital cardiac arrest is worthwhile', International Journal of Cardiology, vol. 201, pp. 616-623. https://doi.org/10.1016/j.ijcard.2015.08.143
Sun, C, Walker, KL, Wakefield, DL & Dichtel, WR 2015, 'Retaining the Activity of Enzymes and Fluorophores Attached to Graphene Oxide', Chemistry of Materials, vol. 27, no. 12, pp. 4499-4504. https://doi.org/10.1021/acs.chemmater.5b01954
Normann, J & Bjerregaard, T 2015, Retention of Highly Skilled Expatriates and the Danish Work–Life Balance. in PH Andersen , H Kragh, JL & MS Linneberg (eds), Preparing for the Unexpected: Design of the Future Global Enterprise. Djøf Forlag, pp. 95-118.
Nakken, KO, Lindstrøm, P & Andersen, H 2015, 'Retention rate of zonisamide in intractable epilepsy', Acta Neurologica Scandinavica, vol. 131, no. 5, pp. 268-274. https://doi.org/10.1111/ane.12379
Moutsios, S 2015, 'Rethinking educational comparison under the conditions of globalisation', Paper presented at Comparative and International Education Society, Washington D.C., United States, 08/03/2015 - 13/03/2015.
Esbjerg, L 2015, 'Rethinking how retail buyers make buying decisions: From rational decision-making to retailer buying as relationally-responsive interaction', Paper presented at AMA/ACRA Second Triennual Conference, Coral Gables, United States, 04/03/2015 - 07/03/2015.
Lystbæk, CT 2015, 'Re-thinking reflection in supervision: A socio-cultural perspective on supervision in professional education', NERA 2015. 43th Annual Congress, Göteborg, Sweden, 04/03/2015 - 06/03/2015.
Deco, G, Tononi, G, Boly, M & Kringelbach, ML 2015, 'Rethinking segregation and integration: contributions of whole-brain modelling', Nature Reviews. Neuroscience, vol. 16, no. 7, pp. 430-9. https://doi.org/10.1038/nrn3963
Vium, C & Taïx, C 2015, 'Retour au Bush', Le Monde, vol. Le Magasin du Monde, no. 216, pp. 66-75.
Dubois, M-C, Bisegna, F, Gentile, N, Knoop, M, Matusiak, B, Osterhaus, W & Tetri, E 2015, 'Retrofitting the electric lighting and daylighting systems to reduce energy use in buildings: a literature review', Energy Research Journal, vol. 6, no. 1, pp. 25-41 . https://doi.org/10.3844/erjsp.2015.25.41
Kjærgaard, B, Hønge, JL, Magnusdottir, SO, Rasmussen, BS, Baandrup, U, Hasenkam, JM & Kristensen, SR 2015, 'Retrograde lung perfusion in the treatment of massive pulmonary embolism. A randomised porcine study', The 25th Annual Meeting of the Scandinavian Society for Research in Cardiothoracic Surgery, Geilo, Norway, 12/02/2015 - 14/02/2015.
Galassi, AR, Sianos, G, Werner, GS, Escaned, J, Tomasello, SD, Boukhris, M, Castaing, M, Büttner, JH, Bufe, A, Kalnins, A, Spratt, JC, Garbo, R, Hildick-Smith, D, Elhadad, S, Gagnor, A, Lauer, B, Bryniarski, L, Christiansen, EH, Thuesen, L, Meyer-Geßner, M, Goktekin, O, Carlino, M, Louvard, Y, Lefèvre, T, Lismanis, A, Gelev, VL, Serra, A, Marzà, F, Di Mario, C, Reifart, N & Euro CTO Club 2015, 'Retrograde Recanalization of Chronic Total Occlusions in Europe: Procedural, In-Hospital, and Long-Term Outcomes From the Multicenter ERCTO Registry', Journal of the American College of Cardiology, vol. 65, no. 22, pp. 2388-400. https://doi.org/10.1016/j.jacc.2015.03.566
Michelsen, A 2015, Retskilder. in Lærebog om indkomstskat. 16. edn, Djøf Forlag, Kbh., pp. 107-155.
Dalberg-Larsen, J 2015, Retssproget, juridisk magtudøvelse og demokrati. in AL Kjær, L Adrian, CB Cederstrøm, J Engberg, J Gabrielsen, M Rosenmeier & S Shaumburg-Müller (eds), Retten i sproget: Samspillet mellem ret og sprog i juridisk praksis. Djøf Forlag, København, pp. 61-72.
Dalberg-Larsen, J 2015, Retsteori og samfundsudvikling. in T Baumbach, P Blume & MG (eds), Ret på flere felter: Forvaltning, Governance, Retssikkerhed. Djøf Forlag, København, pp. 217-232.
Michelsen, A 2015, Rette indkomstmodtager og lovhjemlet indkomstdeling. in Lærebog om indkomstskat. 16. edn, Djøf Forlag, Kbh., pp. 675-711.
Kjær, AL, Adrian, L, Cederstrøm, CB, Engberg, J, Gabrielsen, J, Rosenmeier, M & Schaumburg-Müller, S (eds) 2015, Retten i sproget. Samspillet mellem ret og sprog i juridisk praksis. Jurist- og Økonomforbundets Forlag, København.