Medicinal Chemistry Research

, Volume 26, Issue 12, pp 3173–3187 | Cite as

Discovery of tetrahydro-ß-carboline derivatives as a new class of phosphodiesterase 4 inhibitors

  • Ahmad Abdelwaly
  • Ismail Salama
  • Mohamed S. Gomaa
  • Mohamed A. Helal
Original Research
  • 163 Downloads

Abstract

Phosphodiesterase 4 is the primary enzyme responsible for degradation of the second messenger cAMP in many of the cells releasing proinflammatory mediators. Inhibition of this enzyme could help in the management of various inflammatory conditions such as asthma, chronic obstructive pulmonary disorder, arthritis, and psoriasis. In this study, two novel series of tetrahydro-β-carbolines were designed by combining the pharmacophoric features of both tadalafil and piclamilast. Twenty-two compounds were synthesized and assessed for Phosphodiesterase 4 inhibition, four of them showed superior activity to the reference compound IBMX. Docking studies showed that the prepared compounds interact with the crucial Gln443 with variable interactions with the hydrophobic pocket Q2. This is the first report of tetrahydro-β-carbolines as a scaffold for Phosphodiesterase 4 inhibition. Currently, further optimization of the substituents is carried out to fine-tune the hydrophobic interactions and enhance the potency of this novel series of inhibitors.

Graphical abstract

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Keywords

COPD Asthma PDE4 β-Carboline Docking 

Notes

Acknowledgements

This study was entirely funded by the Science and Technology Development Fund (STDF), Egypt, Grant #4711, awarded to the Principal Investigator Dr. Mohamed A. Helal. The authors would like to thank Dr. Khaled M. Darwish, Medicinal Chemistry Department, Faculty of Pharmacy, Suez Canal University, for his insights in the design of the target compounds and during the synthetic steps.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Supplementary material

44_2017_2011_MOESM1_ESM.doc (12 mb)
Supplementary Information

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  • Ahmad Abdelwaly
    • 1
  • Ismail Salama
    • 1
  • Mohamed S. Gomaa
    • 1
  • Mohamed A. Helal
    • 1
  1. 1.Medicinal Chemistry Department, Faculty of PharmacySuez Canal UniversityIsmailiaEgypt

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