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  4. Selective Integrin alpha(5)beta(1) Targeting through Spatially Constrained Multivalent DNA-Based Nanoparticles
 
research article

Selective Integrin alpha(5)beta(1) Targeting through Spatially Constrained Multivalent DNA-Based Nanoparticles

Kurisinkal, Eva E.  
•
Caroprese, Vincenzo  
•
Koga, Marianna M.  
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August 1, 2022
Molecules

Targeting cells specifically based on receptor expression levels remains an area of active research to date. Selective binding of receptors cannot be achieved by increasing the individual binding strength, as this does not account for differing distributions of receptor density across healthy and diseased cells. Engaging receptors above a threshold concentration would be desirable in devising selective diagnostics. Integrins are prime target candidates as they are readily available on the cell surface and have been reported to be overexpressed in diseases. Insights into their spatial organization would therefore be advantageous to design selective targeting agents. Here, we investigated the effect of activation method on integrin alpha(5)beta(1) clustering by immunofluorescence and modeled the global neighbor distances with input from an immuno-staining assay and image processing of microscopy images. This data was used to engineer spatially-controlled DNA-scaffolded bivalent ligands, which we used to compare trends in spatial-selective binding observed across HUVEC, CHO and HeLa in resting versus activated conditions in confocal microscopy images. For HUVEC and CHO, the data demonstrated an improved selectivity and localisation of binding for smaller spacings similar to 7 nm and similar to 24 nm, in good agreement with the model. A deviation from the mode predictions for HeLa was observed, indicative of a clustered, instead of homogeneous, integrin organization. Our findings demonstrate how low-technology imaging methods can guide the design of spatially controlled ligands to selectively differentiate between cell type and integrin activation state.

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Type
research article
DOI
10.3390/molecules27154968
Web of Science ID

WOS:000839775200001

Author(s)
Kurisinkal, Eva E.  
Caroprese, Vincenzo  
Koga, Marianna M.  
Morzy, Diana  
Bastings, Maartje M. C.  
Date Issued

2022-08-01

Publisher

MDPI

Published in
Molecules
Volume

27

Issue

15

Article Number

4968

Subjects

Biochemistry & Molecular Biology

•

Chemistry, Multidisciplinary

•

Biochemistry & Molecular Biology

•

Chemistry

•

selective targeting

•

spatial tolerance

•

dna nanotechnology

•

integrins

•

multivalency

•

therapeutic targets

•

glycocalyx

•

recognition

•

activation

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adhesion

•

conformation

•

fibronectin

•

expression

•

insights

•

growth

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
PBL  
Available on Infoscience
August 29, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/190267
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