Startseite Transcytosis of payloads that are non-covalently complexed to bispecific antibodies across the hCMEC/D3 blood-brain barrier model
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Transcytosis of payloads that are non-covalently complexed to bispecific antibodies across the hCMEC/D3 blood-brain barrier model

  • Daniela Schmid , Annette Buntz , Thi Ngoc Hanh Phan , Klaus Mayer , Eike Hoffmann , Irmgard Thorey , Jens Niewöhner , Katrin Vasters , Ranjan Sircar , Olaf Mundigl , Roland E. Kontermann und Ulrich Brinkmann EMAIL logo
Veröffentlicht/Copyright: 20. Februar 2018

Abstract

A transcellular shuttle system was generated for the delivery of non-covalently linked payloads across blood-brain barrier (BBB) endothelial cells. Transcytosis-enabling shuttles are composed of bispecific antibodies (bsAbs) that simultaneously bind transferrin receptor (TfR) and haptens such as digoxigenin or biocytinamide. Haptenylated payloads are attached to these vehicles via non-covalent hapten-antibody complexation. This enables targeting to and internalization into human BBB-derived microvascular endothelial hCMEC/D3 cells. In contrast to other shuttles, this system does not require special affinities or formats of their TfR-binding moieties for transcytosis and subsequent release. Non-covalent payload complexation to bsAb is flexible and robust, works for a multitude of payloads and enables separation of payloads from shuttles during transcytosis. Released payloads can enter the brain without connected bsAb entities, minimizing potential interference with distribution or functionality. Intracellular separation of shuttle and payload and recycling to cell surfaces may also enable recharging of the cell-bound BBB shuttle with payload for subsequent (merry-go-round) transport cycles.

Acknowledgements

We thank Heike Seul and Martina Wagner for excellent support and contributions. D.S. and A.B. are supported by the Roche Postdoc Fund (RPF)/Targeted Therapies.

  1. Conflict of interest statement: The authors are employees of Roche Pharma Research and Early Development. Roche is interested in targeted therapies.

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Supplemental Material:

The online version of this article offers supplementary material (https://doi.org/10.1515/hsz-2017-0311).


Received: 2017-12-15
Accepted: 2018-02-08
Published Online: 2018-02-20
Published in Print: 2018-06-27

©2018 Walter de Gruyter GmbH, Berlin/Boston

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