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Bioengineering bacterial encapsulin nanocompartments as targeted drug delivery system

Synthetic and Systems Biotechnology 2021年第3期6卷 231-241页

作者： Alexander Van de Steen Rana Khalife Noelle Colant Hasan Mustafa Khan Matas Deveikis Saverio Charalambous Clare M.Robinson Rupali Dabas Sofia Esteban Serna Diana A.Catana Konstantin Pildish Vladimir Kalinovskiy kenth gustafsson Stefanie Frank Department of Biochemical Engineering University College LondonUK Natural Sciences University College LondonUK Division of Biosciences University College LondonUK UCL iGEM Student Team 2019 UK

The development of Drug Delivery Systems(DDS)has led to increasingly efficient therapies for the treatment and detection of various *** use a range of nanoscale delivery platforms produced from polymeric of inorganic materials,such as micelles,and metal and polymeric nanoparticles,but their variant chemical composition make alterations to their size,shape,or structures inherently *** encoded protein nanocages are highly promising DDS candidates because of their modular composition,ease of recombinant production in a range of hosts,control over assembly and loading of cargo molecules and *** example of naturally occurring nanocompartments are encapsulins,recently discovered bacterial organelles that have been shown to be reprogrammable as nanobioreactors and vaccine *** we report the design and application of a targeted DDS platform based on the Thermotoga maritima encapsulin reprogrammed to display an antibody mimic protein called Designed Ankyrin repeat protein(DARPin)on the outer surface and to encapsulate a cytotoxic *** DARPin9.29 chosen in this study specifically binds to human epidermal growth factor receptor 2(HER2)on breast cancer cells,as demonstrated in an in vitro cell culture *** encapsulin-based DDS is assembled in one step in vivo by co-expressing the encapsulin-DARPin9.29 fusion protein with an engineered flavin-binding protein mini-singlet oxygen generator(MiniSOG),from a single plasmid in Escherichia *** encapsulin-DARPin_miniSOG nanocompartments bind specifically to HER2 positive breast cancer cells and trigger apoptosis,indicating that the system is functional and *** DDS is modular and has the potential to form the basis of a multi-receptor targeted system by utilising the DARPin screening libraries,allowing use of new DARPins of known specificities,and through the proven flexibility of the encapsulin cargo loading mechanism,allowing selection of cargo proteins

关键词： Encapsulin Drug delivery system Cytotoxic protein DARPin

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