Advanced search
1 file | 6.66 MB

Selective glucocorticoid receptor properties of GSK866 analogs with cysteine reactive warheads

Author
Organization
Abstract
Synthetic glucocorticoids (GC) are the mainstay therapy for treatment of acute and chronic inflammatory disorders. Due to the high adverse effects associated with long-term use, GC pharmacology has focused since the nineties on more selective GC ligand-binding strategies, classified as selective glucocorticoid receptor (GR) agonists (SEGRAs) or selective glucocorticoid receptor modulators (SEGRMs). In the current study, GSK866 analogs with electrophilic covalent-binding warheads were developed with potential SEGRA properties to improve their clinical safety profile for long-lasting topical skin disease applications. Since the off-rate of a covalently binding drug is negligible compared to that of a non-covalent drug, its therapeutic effects can be prolonged and typically, smaller doses of the drug are necessary to reach the same level of therapeutic efficacy, thereby potentially reducing systemic side effects. Different analogs of SEGRA GSK866 coupled to cysteine reactive warheads were characterized for GR potency and selectivity in various biochemical and cellular assays. GR-and NF kappa B dependent reporter gene studies show favorable anti-inflammatory properties with reduced GR transactivation of two non-steroidal GSK866 analogs UAMC-1217 and UAMC-1218, whereas UAMC-1158 and UAMC-1159 compounds failed to modulate cellular GR activity. These results were further supported by GR immuno-localization and S211 phospho-GR western analysis, illustrating significant GR phosphoactivation and nuclear translocation upon treatment of GSK866, UAMC-1217, or UAMC-1218, but not in case of UAMC-1158 or UAMC-1159. Furthermore, mass spectrometry analysis of tryptic peptides of recombinant GR ligand-binding domain (LBD) bound to UAMC-1217 or UAMC-1218 confirmed covalent cysteine-dependent GR binding. Finally, molecular dynamics simulations, as well as glucocorticoid receptor ligand-binding domain (GR-LBD) coregulator interaction profiling of the GR-LBD bound to GSK866 or its covalently binding analogs UAMC-1217 or UAMC-1218 revealed subtle conformational differences that might underlie their SEGRA properties. Altogether, GSK866 analogs UAMC-1217 and UAMC-1218 hold promise as a novel class of covalent-binding SEGRA ligands for the treatment of topical inflammatory skin disorders.
Keywords
glucocorticoid receptor, SEGRA, NF kappa B, electrophilic, covalent warhead, cysteine, FACTOR-KAPPA-B, INFLAMMATORY SKIN DISEASES, IMPROVED THERAPEUTIC INDEX, TUMOR-NECROSIS-FACTOR, TISSUE-CULTURE CELLS, MOLECULAR-MECHANISMS, DEXAMETHASONE 21-MESYLATE, COVALENT INHIBITORS, CRYSTAL-STRUCTURE, TOPICAL TREATMENT

Downloads

  • fimmu-08-01324.pdf
    • full text
    • |
    • open access
    • |
    • binary/octet-stream
    • |
    • 6.66 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Chirumamilla, Chandra S, Ajay Palagani, Balu Kamaraj, Ken Declerck, Marinus WC Verbeek, Oksana Ryabtsova, Karolien De Bosscher, et al. 2017. “Selective Glucocorticoid Receptor Properties of GSK866 Analogs with Cysteine Reactive Warheads.” Frontiers in Immunology 8.
APA
Chirumamilla, C. S., Palagani, A., Kamaraj, B., Declerck, K., Verbeek, M. W., Ryabtsova, O., De Bosscher, K., et al. (2017). Selective glucocorticoid receptor properties of GSK866 analogs with cysteine reactive warheads. FRONTIERS IN IMMUNOLOGY, 8.
Vancouver
1.
Chirumamilla CS, Palagani A, Kamaraj B, Declerck K, Verbeek MW, Ryabtsova O, et al. Selective glucocorticoid receptor properties of GSK866 analogs with cysteine reactive warheads. FRONTIERS IN IMMUNOLOGY. 2017;8.
MLA
Chirumamilla, Chandra S, Ajay Palagani, Balu Kamaraj, et al. “Selective Glucocorticoid Receptor Properties of GSK866 Analogs with Cysteine Reactive Warheads.” FRONTIERS IN IMMUNOLOGY 8 (2017): n. pag. Print.
@article{8546520,
  abstract     = {Synthetic glucocorticoids (GC) are the mainstay therapy for treatment of acute and chronic inflammatory disorders. Due to the high adverse effects associated with long-term use, GC pharmacology has focused since the nineties on more selective GC ligand-binding strategies, classified as selective glucocorticoid receptor (GR) agonists (SEGRAs) or selective glucocorticoid receptor modulators (SEGRMs). In the current study, GSK866 analogs with electrophilic covalent-binding warheads were developed with potential SEGRA properties to improve their clinical safety profile for long-lasting topical skin disease applications. Since the off-rate of a covalently binding drug is negligible compared to that of a non-covalent drug, its therapeutic effects can be prolonged and typically, smaller doses of the drug are necessary to reach the same level of therapeutic efficacy, thereby potentially reducing systemic side effects. Different analogs of SEGRA GSK866 coupled to cysteine reactive warheads were characterized for GR potency and selectivity in various biochemical and cellular assays. GR-and NF kappa B dependent reporter gene studies show favorable anti-inflammatory properties with reduced GR transactivation of two non-steroidal GSK866 analogs UAMC-1217 and UAMC-1218, whereas UAMC-1158 and UAMC-1159 compounds failed to modulate cellular GR activity. These results were further supported by GR immuno-localization and S211 phospho-GR western analysis, illustrating significant GR phosphoactivation and nuclear translocation upon treatment of GSK866, UAMC-1217, or UAMC-1218, but not in case of UAMC-1158 or UAMC-1159. Furthermore, mass spectrometry analysis of tryptic peptides of recombinant GR ligand-binding domain (LBD) bound to UAMC-1217 or UAMC-1218 confirmed covalent cysteine-dependent GR binding. Finally, molecular dynamics simulations, as well as glucocorticoid receptor ligand-binding domain (GR-LBD) coregulator interaction profiling of the GR-LBD bound to GSK866 or its covalently binding analogs UAMC-1217 or UAMC-1218 revealed subtle conformational differences that might underlie their SEGRA properties. Altogether, GSK866 analogs UAMC-1217 and UAMC-1218 hold promise as a novel class of covalent-binding SEGRA ligands for the treatment of topical inflammatory skin disorders.},
  articleno    = {1324},
  author       = {Chirumamilla, Chandra S and Palagani, Ajay and Kamaraj, Balu and Declerck, Ken and Verbeek, Marinus WC and Ryabtsova, Oksana and De Bosscher, Karolien and Bougarne, Nadia and Ruttens, Bart and Gevaert, Kris and Houtman, Ren{\'e} and De Vos, Winnok and Joossens, Jurgen and Van Der Veken, Pieter and Augustyns, Koen and Van Ostade, Xaveer and Bogaerts, Annemie and De Winter, Hans and Vanden Berghe, Wim},
  issn         = {1664-3224},
  journal      = {FRONTIERS IN IMMUNOLOGY},
  keyword      = {glucocorticoid receptor,SEGRA,NF kappa B,electrophilic,covalent warhead,cysteine,FACTOR-KAPPA-B,INFLAMMATORY SKIN DISEASES,IMPROVED THERAPEUTIC INDEX,TUMOR-NECROSIS-FACTOR,TISSUE-CULTURE CELLS,MOLECULAR-MECHANISMS,DEXAMETHASONE 21-MESYLATE,COVALENT INHIBITORS,CRYSTAL-STRUCTURE,TOPICAL TREATMENT},
  language     = {eng},
  pages        = {17},
  title        = {Selective glucocorticoid receptor properties of GSK866 analogs with cysteine reactive warheads},
  url          = {http://dx.doi.org/10.3389/fimmu.2017.01324},
  volume       = {8},
  year         = {2017},
}

Altmetric
View in Altmetric