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Structurally Constrained Insulin Analogs by Directed Stepwise Crosslinking.

Fa Zhang1, John P Mayer1, Vasily Gelfanov2

  • 1Department of Chemistry, Indiana University, Bloomington, IN 47405, United States.

Protein and Peptide Letters
|November 2, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to create crosslinked insulin analogs, reducing their biological potency. This advancement allows for precise control over insulin

Keywords:
Insulin analogsamide bondbioactivitybiological potencypeptide hormonereversible tethering.

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Area of Science:

  • Biochemistry
  • Medicinal Chemistry
  • Endocrinology

Background:

  • Optimization of insulin analogs aims for improved pharmacokinetic control and therapeutic index.
  • Intramolecular structural constraint offers a potential strategy for reversible insulin inactivation.
  • Previous crosslinking methods lacked selectivity, yielding multiple derivatives.

Purpose of the Study:

  • To systematically evaluate the synthesis of covalently crosslinked insulin analogs using asymmetric methods.
  • To assess the biological consequences of these site-specific crosslinked insulin analogs.

Main Methods:

  • Developed a two-step synthesis procedure for amine crosslinked insulin analogs.
  • Initiated synthesis via amide bond formation, followed by second-site alkylation.
  • Produced site-specific, cross-linked insulin analogs with defined tether locations.

Main Results:

  • Successfully synthesized unique insulin analogs crosslinked at specific native amine sites.
  • Chemical characterization confirmed the structure of the novel analogs.
  • In vitro bioanalysis revealed a significant and consistent reduction in biological potency.

Conclusions:

  • Achieved unambiguous two-step synthesis of crosslinked insulin analogs with varying tether locations.
  • Demonstrated that molecular constraint effectively reduces insulin bioactivity.
  • This research provides a foundation for in vivo studies on pharmacologically controlled insulin analogs.