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10.1016/j.jconrel.2021.07.045

http://scihub22266oqcxt.onion/10.1016/j.jconrel.2021.07.045
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34352314!ä!34352314

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suck abstract from ncbi


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pmid34352314      J+Control+Release 2021 ; 337 (ä): 448-457
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  • Elongated PEO-based nanoparticles bind the high-density lipoprotein (HDL) receptor scavenger receptor class B I (SR-BI) #MMPMID34352314
  • Raith M; Kauffman SJ; Asoudeh M; Buczek JA; Kang NG; Mays JW; Dalhaimer P
  • J Control Release 2021[Sep]; 337 (ä): 448-457 PMID34352314show ga
  • Targeting cell-surface receptors with nanoparticles (NPs) is a crucial aspect of nanomedicine. Here, we show that soft, flexible, elongated NPs with poly-ethylene-oxide (PEO) exteriors and poly-butadiene (PBD) interiors - PEO-PBD filomicelles - interact directly with the major high-density lipoprotein (HDL) receptor and SARS-CoV-2 uptake factor, SR-BI. Filomicelles have a ~ 6-fold stronger interaction with reconstituted SR-BI than PEO-PBD spheres. HDL, and the lipid transport inhibitor, BLT-1, both block the uptake of filomicelles by macrophages and Idla7 cells, the latter are constitutively expressing SR-BI (Idla7-SR-BI). Co-injections of HDL and filomicelles into wild-type mice reduced filomicelle signal in the liver and increased filomicelle plasma levels. The same was true with SCARB1(-/-) mice. SR-BI binding is followed by phagocytosis for filomicelle macrophage entry, but only SR-BI is needed for entry into Idla7-SR-BI cells. PEO-PBD spheres did not interact strongly with SR-BI in the above experiments. The results show elongated PEO-based NPs can bind cells via cooperativity among SR-BI receptors on cell surfaces.
  • |*COVID-19[MESH]
  • |*Nanoparticles[MESH]
  • |Animals[MESH]
  • |CD36 Antigens[MESH]
  • |Humans[MESH]
  • |Lipoproteins, HDL/metabolism[MESH]
  • |Mice[MESH]
  • |Receptors, Immunologic[MESH]
  • |SARS-CoV-2[MESH]


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