Article (Scientific journals)
An improved PDE6D inhibitor combines with Sildenafil to inhibit KRAS-mutant cancer cell growth
Kaya, P.; Schaffner-Reckinger, E.; Manoharan, G.B. et al.
2024In Journal of Medicinal Chemistry, in press (in press)
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Keywords :
PDE6D; inhibitor; Sildenafil; KRAS; cancer; medicinal chemistry
Abstract :
[en] The trafficking chaperone PDE6D (or PDEδ) was proposed as a surrogate target for K-Ras, leading to the development of a series of inhibitors that block its prenyl binding pocket. These inhibitors suffered from low solubility and suspected off-target effects, preventing their clinical development. Here, we developed a highly soluble, low nanomolar PDE6D inhibitor (PDE6Di), Deltaflexin3, which has the lowest off-target activity as compared to three prominent reference compounds. Deltaflexin3 reduces Ras signaling and selectively decreases the growth of KRAS mutant and PDE6D-dependent cancer cells. We further show that PKG2-mediated phosphorylation of Ser181 lowers K-Ras binding to PDE6D. Thus, Deltaflexin3 combines with the approved PKG2 activator Sildenafil to more potently inhibit PDE6D/K-Ras binding, cancer cell proliferation, and microtumor growth. As observed previously, inhibition of Ras trafficking, signaling, and cancer cell proliferation remained overall modest. Our results suggest reevaluating PDE6D as a K-Ras surrogate target in cancer.
Research center :
Faculty of Science, Technology and Medicine (FSTM) - Cancer Cell Biology and Drug Discovery (Abankwa group)
Luxembourg Centre for Systems Biomedicine (LCSB): Biomedical Data Science (Glaab Group)
Disciplines :
Life sciences: Multidisciplinary, general & others
Human health sciences: Multidisciplinary, general & others
Author, co-author :
Kaya, P.
Schaffner-Reckinger, E.
Manoharan, G.B.
Vukic, V.
Kiriazis, A.
Ledda, M.
Burgos, M.
Pavic, K.
Gaigneaux, A.
GLAAB, Enrico  ;  University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Biomedical Data Science
Abankwa, D.K.
External co-authors :
yes
Language :
English
Title :
An improved PDE6D inhibitor combines with Sildenafil to inhibit KRAS-mutant cancer cell growth
Publication date :
2024
Journal title :
Journal of Medicinal Chemistry
ISSN :
0022-2623
eISSN :
1520-4804
Volume :
in press
Issue :
in press
Pages :
in press
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Systems Biomedicine
Development Goals :
3. Good health and well-being
FnR Project :
AFR 13589879
PoC20/15269106-inhibitPDE-RASv2
Funders :
FNR - Fonds National de la Recherche
Funding number :
PoC20/15269106-inhibitPDE-RASv2
Commentary :
The original publication is available at: https://doi.org/10.1021/acs.jmedchem.3c02129
Available on ORBilu :
since 21 May 2024

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