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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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Kristensen, EF, Kofman, PD & Daugbjerg Jensen, P 2003, 'Counter pressure on ventilation of different types of wood chip and chunkwood', Biomass & Bioenergy, vol. 25, no. 4, pp. 399-408.
Ruden, TA, Helgaker, T, Jørgensen, P & Olsen, J 2003, 'Coupled-cluster connected-quadruples corrections to atomization energies', Chemical Physics Letters, vol. 371, pp. 62-67.
Van Roosbroeck, J, De Witte, H, Gorska, M, Huyse, M, Kruglov, K, Van de Vel, K, Van Duppen, P, Franchoo, S, Cederkall, J, Fedoseyev, VN, Fynbo, H, Georg, U, Jonsson, O, Köster, U, Weissman, L, Mueller, WF, Mishin, VI, Fedorov, D, Walters, WB, Smirnova, NA, Van Dyck, A, De Maesschalck, A & Heyde, K 2003, 'Coupling a proton and a neutron to the semidoubly magic nucleus 68Ni: A study of 70Cu via the β decay of 70Ni and 70Cu', Physical Review C (Nuclear Physics), vol. 69, pp. 012703-1-11.
Petersen, JS, Bregenholt, S, Apostolopolous, V, Homann, D, Wolfe, T, Hughes, A, De Jongh, K, Dyrberg, TB, Von Herrath, MG & Wang, M 2003, 'Coupling of oral human or porcine insulin to the B subunit of cholera toxin (CTB) overcomes critical antigenic differences for prevention of type I diabetes', Clinical and Experimental Immunology, vol. 134, no. 1, pp. 38-45.
Ratzer, AV, Wells, LM, Lassen, HM, Laursen, M, Qvortrup, JF, Stissing, MS, Westergaard, M, Christensen, S, Jensen, K, Aalst, WMPVD (ed.) & Best, E (ed.) 2003, CPN Tools for Editing, Simulating, and Analysing Coloured Petri Nets. in WVD Aalst & E Best (eds), Applications and Theory of Petri Nets 2003. vol. 2679, Springer, Lecture Notes in Computer Science, vol. 2679, pp. 450-462, International Conference on Applications and Theory of Petri Nets. ICATPN 2003, Eindhoven, Netherlands, 23/06/2003.
Damian, D & Danvy, O 2003, 'CPS Transformation of Flow Information, Part II: Administrative Reductions', Journal of Functional Programming, vol. 13, no. 5, pp. 925-933. https://doi.org/10.1017/S0956796803004702
Jensen, HM 2003, 'Crack initiation and growth in brittle bonds', Engineering Fracture Mechanics, vol. 70, no. 13, pp. 1611-1621. https://doi.org/10.1016/S0013-7944(02)00200-X
Govindarajan, S, Agarwal, PK & Arge, LA 2003, CRB-Tree: An Efficient Indexing Scheme for Range-Aggregate Queries. in D Calvanese, M Lenzerini & R Motwani (eds), Database Theory - ICDT 2003: 9th International Conference Siena, Italy, January 8-10, 2003 Proceedings. Springer, Lecture Notes in Computer Science, vol. 2572, pp. 143-157, International Conference on Database Theory, Siena, Italy, 08/01/2003. https://doi.org/10.1007/3-540-36285-1_10
Birkedal, R & Gesser, H 2003, 'Creatine kinase and mitochondrial respiration in hearts of trout, cod and freshwater turtle', Journal of Comparative Physiology B: Biochemical, Systems, and Environmental Physiology, vol. 173, pp. 493-499.
Gulløv, E 2003, Creating a natural place for children: An ethnographic study of Danish kondergartens. in Children's places: cross-cultural perspectives. 1. udgave edn, Routledge, London.
Weyer, G, Gunnlaugsson, HP, Dietrich, M, Fanciulli, M, Bharuth-Ram, K, Sielmann, R & nullISOLDECollaboration, T 2003, 'Creation and annealing of defect structures in silicon-based semiconductors during and after implantations at 77-500 K', Nucl. Instr. Meth. B, vol. 206, pp. 90-94.
Niekerk, KVK 2003, Critical Realism. in Encyclopedia of Science and Religion. vol. 1, Mac Millan Reference, New York, pp. 190-193.
Niekerk, KVK 2003, 'Critical Realism in Science and Theology', Omega - Indian Journal of Science and Religion, vol. 2, no. 2, pp. 89-100.
Olesen, JE, Askegaard, M & Rasmussen, IA 2003, Crop production and N leaching in arable organic farming. in O Niemeläinen & M Topi-Hulmi (eds), Nordic Agriculture in Global Perspective: Proceedings of NJF's 22nd Congress . pp. 195-195.
Alexander, V 2003, Cross-Cultural Encounters in Amit Chaudhuri's Afternoon Raag and Yasmine Gooneratne's A Change of Skies. in The Politics of English as a World Language. New Horizons in Postcolonial Cultural Studies. Ed. Christian Mair. Brill | Rodopi, pp. 375-383, The Politics of English as a World Language. New Horizons in Postcolonial Cultural Studies, Freiburg i.Br., Germany, 17/12/2010.
Vestergaard, J 2003, Cross-Cultural Student/Business Cooperative Education: The Denmark Project. in Proceedings of the International Business and Economy Conference 2003. International Business and Economy Conference, San Francisco, USA, 09/01/2003.
Best, CT, Halle, P, Faber, A & Bohn, O-S 2003, Cross-language perception of non-native vowels. in International Conference of Phonetic Sciences. pp. 2889-2892, International Conference of Phonetic Sciences, Barcelona, Spain, 17/12/2010.
Berthelot, F, Martinat-Botte, F, Terqui, M & Vajta, G 2003, 'Cryopreservation of porcine embryos: state of the art', Livestock Production Science, vol. 83, no. 1, pp. 73-83. https://doi.org/10.1016/S0301-6226(03)00038-1
Enemark, HL 2003, 'Cryptosporidiosis a common cause of diarrhoea in calves', Proceedings of the Annual Meeting of the Association of Danish cattle practitioners, 30/10/2003.
Enemark, HL, Ahrens, P, Bille-Hansen, V, Heegaard, PMH, Vigre, H, Thamsborg, SM & Lind, P 2003, 'Cryptosporidium parvum: infectivity and pathogenicity of the 'porcine' genotype', Parasitology, vol. 126, no. Pt 5, pp. 407-416. https://doi.org/10.1017/s0031182003003032
Enemark, HL 2003, Cryptosporidium parvum. in Annual report on zoonoses in Denmark 2002. Ministry of Food, Agriculture and Fisheries .
Rasmussen, SE, Grundvig, S, Lundtoft, B & Fogh, F 2003, 'Crystal data for CaNa-iminodisulfonat, trihydrat', Powder Diffraction, vol. 18, pp. 0-0.
Lorentzen, E, Pohl, E, Zwart, P, Stark, EA, Russell, RB, Knura, T, Hensel, R & Siebers, B 2003, 'Crystal structure of an archaeal class I aldolase and the evolution of (betaalpha)8 barrel proteins', J. Biol. Chem., vol. 278, no. 47, pp. 47253-47260.
Grégoire, V, Levendag, P, Ang, KK, Bernier, J, Braaksma, M, Budach, V, Chao, C, Coche, E, Cooper, JS, Cosnard, G, Eisbruch, A, El-Sayed, S, Emami, B, Grau, C, Hamoir, M, Lee, N, Maingon, P, Muller, K & Reychler, H 2003, 'CT-based delineation of lymph node levels and related CTVs in the node-negative neck: DAHANCA, EORTC, GORTEC, NCIC, RTOG consensus guidelines', Radiotherapy & Oncology, vol. 69, no. 3, pp. 227-236. https://doi.org/10.1016/j.radonc.2003.09.011
Grégoire, V, Levendag, P, Ang, KK, Bernier, J, Braaksma, M, Budach, V, Chao, C, Coche, E, Cooper, JS, Cosnard, G, Eisbruch, A, El-Sayed, S, Emami, B, Grau, C, Hamoir, M, Lee, N, Maingon, P, Muller, K & Reychler, H 2003, 'CT-based delineation of lymph node levels and related CTVs in the node-negative neck: DAHANCA, EORTC, GORTEC, NCIC,RTOG consensus guidelines', Radiotherapy & Oncology, vol. 69, no. 3, pp. 227-36.
Tsing, A 2003, Cultivating the Wild. in C Zerner (ed.), Culture and the Question of Rights. Duke University Press, pp. 24-55.
Ravn, B (ed.) 2003, Cultural and Political Divergences in Approaches to Cooperation between Home, School and Local Society in Europe. in School, family, and community partnerships in a world of difference and changes. Gdansk University.
Nielsen, HK 2003, 'Cultural Policy and Evaluation of Quality', The International Journal of Cultural Policy, vol. 9, no. 3.
Gudmundsson, G 2003, Cultural Policy in Iceland. in The Nordic Cultural Model. Klim, Aarhus.
Lindenskov, L 2003, Cultural Understanding. in Adults Learning Mathematics Across Borders: A Grundtvig project of Belgium, Denmark, the Netherlands and Norway. Cinop, Centrum voor innovatie van opleidingen, 's Hertogenbosch, the Netherlands, pp. 23-30.
Rømer, JL, Kelsen, J, Dahl, R & Hoffmann, HJ 2003, 'Culture of Regulatory T-cell Lines from Bronchial Mucosa', Scandinavian Journal of Immunology, vol. 58, no. 2, I04, pp. 48.
Mustard, R, Baker, T, Williams, PW, Ulrich, T, Mernagh, T, Ryan, CG, Van Achterbergh, E & Adshead, N 2003, 'Cu-rich brines at the Osborne and Starra deposits: Implications for immiscibility in Fe-oxide Cu-Au systems', Transactions of the Institution of Mining and Metallurgy, Section B: Applied Earth Science, vol. 112, no. 2 AUG, pp. B189-B191.
Cook, RL & ØStergaard, L 2003, 'Current Issues in Screening for Chlamydia trachomatis', Current Infectious Disease Reports, vol. 5, no. 2, pp. 153-158.
Bryld, M & Markussen, R 2003, Cyberkulturer og rekonfigurationer. Samfundslitteratur, Gylling.
Chen, S, Glawischnig, E, Jorgensen, K, Naur, P, Jørgensen, B, Olsen, CE, Hansen, CH, Rasmussen, H, Pickett, JA & Halkier, BA 2003, 'CYP79F1 and CYP79F2 have distinct functions in the biosynthesis of aliphatic glucosinolates in Arabidopsis', Plant Journal, vol. 33, no. 5, pp. 923-938. https://doi.org/10.1046/j.1365-313X.2003.01679.x