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Inclusive Pattern Generation Protocols to Decode Thiol-Mediated Uptake.

Saidbakhrom Saidjalolov1, Filipe Coelho1, Vincent Mercier2

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|May 27, 2024
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Summary
This summary is machine-generated.

Thiol-mediated uptake (TMU) mechanisms were decoded, revealing distinct cellular entry pathways for four major cascade exchangers (CAXs). This research clarifies how these molecules interact with cell surface proteins, impacting cell penetration.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Thiol-mediated uptake (TMU) describes cell penetration facilitated by cascade exchangers (CAXs), but its molecular basis remains largely unknown.
  • Understanding TMU is crucial for applications in drug delivery and biological research.

Purpose of the Study:

  • To develop a general protocol for decoding the dynamic covalent networks responsible for TMU.
  • To elucidate the specific cellular entry pathways utilized by major CAXs.

Main Methods:

  • Utilized uptake inhibition patterns derived from protein knockdown and alternative inhibitors.
  • Analyzed patterns to identify interactions between CAXs and cellular components.
  • Compared TMU patterns with those of known CAX transporters and inhibitors.

Main Results:

  • Identified three distinct, nearly orthogonal cellular entry pathways for four significant CAXs.
  • Epidithiodiketopiperazines (ETP) interact with integrins and protein disulfide isomerases (PDIs).
  • Benzopolysulfanes (BPS) and asparagusic acid (AspA) interact with PDIs (e.g., PDIA3).
  • Antisense oligonucleotide phosphorothioates (OPS) interact with the transferrin receptor and are influenced by PDI levels.

Conclusions:

  • The study provides a foundational understanding of TMU mechanisms.
  • Findings enable precise control over cellular entry for various CAX molecules.
  • This knowledge can be applied to both enhance and inhibit cellular uptake.