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Related Experiment Videos

Superactive insulins.

G T Burke1, S Q Hu, N Ohta

  • 1Department of Biochemistry, Mount Sinai School of Medicine, City University of New York, New York 10029-6574.

Biochemical and Biophysical Research Communications
|December 31, 1990
PubMed
Summary
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Researchers engineered a new insulin analogue by replacing histidine with aspartic acid at position B10. This modification significantly enhances insulin potency, enabling the creation of customized insulins with improved therapeutic effects.

Area of Science:

  • Biochemistry
  • Pharmacology
  • Endocrinology

Background:

  • Human insulin's therapeutic efficacy is well-established.
  • Modifications to insulin structure can alter its pharmacokinetic and pharmacodynamic properties.
  • Developing insulin analogues with enhanced potency is crucial for improved diabetes management.

Purpose of the Study:

  • To investigate the impact of substituting histidine with aspartic acid at position B10 in human insulin.
  • To determine the in vitro potency of the resulting insulin analogue compared to native insulin.
  • To assess the feasibility of creating "tailor-made" insulins with enhanced potency.

Main Methods:

  • Site-directed mutagenesis was employed to substitute histidine with aspartic acid at position B10.

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  • The modified insulin analogue was synthesized and purified.
  • In vitro potency assays were conducted to compare the analogue with the parent insulin compound.

    • Main Results:

    • The aspartic acid substitution at B10 resulted in an insulin analogue with 4- to 5-fold greater in vitro potency than the parent compound.
    • This substitution enhanced the potency of six different insulin analogues, regardless of their initial potency.
    • The modified analogues demonstrated substantially increased potency compared to their respective parent compounds.

    Conclusions:

    • Substitution of histidine with aspartic acid at position B10 is a viable strategy for significantly enhancing insulin analogue potency.
    • This approach allows for the development of "tailor-made" insulins with improved therapeutic potential.
    • The findings pave the way for novel insulin formulations for more effective diabetes treatment.