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Development of Kinase-Selective, Harmine-Based DYRK1A Inhibitors that Induce Pancreatic Human β-Cell Proliferation

Kunal Kumar, Peng Wang, Roberto Sanchez

    Journal of Medicinal Chemistry
    |July 31, 2018
    PubMed

    Insights

    Researchers optimized harmine to target DYRK1A, a key factor in diabetes. New analogues show promise for inducing human beta-cell proliferation and improving kinase selectivity, offering potential new diabetes therapies.

    Area of Science:

    • Biochemistry
    • Endocrinology
    • Medicinal Chemistry

    Background:

    • Dual-specificity tyrosine-phosphorylated regulated kinase 1A (DYRK1A) is a drug target for neurological disorders and oncology.
    • DYRK1A plays a role in human beta-cell proliferation, indicating its potential as a therapeutic target for Type 1 and Type 2 diabetes.

    Purpose of the Study:

    • To optimize harmine, identified through phenotypic screening for its ability to induce beta-cell proliferation.
    • To enhance DYRK1A selectivity and retain beta-cell proliferation capability by exploring structure-activity relationships.

    Main Methods:

    • Synthesized 15 harmine analogues by optimizing the 1-position.
    • Assessed DYRK1A inhibition and human beta-cell proliferation in vitro and in vivo.

    Main Results:

    • Six analogues demonstrated potent DYRK1A inhibition (IC50: 49.5-264 nM).
    • Compounds 2-2 and 2-8 effectively induced human beta-cell proliferation at 3-30 μM.
    • Compound 2-2 exhibited improved kinase selectivity compared to harmine.

    Conclusions:

    • Optimized harmine analogues can effectively inhibit DYRK1A and promote human beta-cell proliferation.
    • Compound 2-2 represents a promising candidate for further development as a diabetes therapeutic due to its enhanced selectivity and efficacy.

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