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Idelalisib inhibits osteoclast differentiation and pre-osteoclast migration by blocking the PI3Kδ-Akt-c-Fos/NFATc1 signaling cascade.
- Source :
-
Archives of pharmacal research [Arch Pharm Res] 2019 Aug; Vol. 42 (8), pp. 712-721. Date of Electronic Publication: 2019 Jun 03. - Publication Year :
- 2019
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Abstract
- Since increased number of osteoclasts could lead to impaired bone structure and low bone mass, which are common characteristics of bone disorders including osteoporosis, the pharmacological inhibition of osteoclast differentiation is one of therapeutic strategies for preventing and/or treating bone disorders and related facture. However, little data are available regarding the functional relevance of phosphoinositide 3-kinase (PI3K) isoforms in the osteoclast differentiation process. To elucidate the functional involvement of PI3Kδ in osteoclastogenesis, here we investigated how osteoclast differentiation was influenced by idelalisib (also called CAL-101), which is p110δ-selective inhibitor approved for the treatment of specific human B cell malignancies. Here, we found that receptor activator of nuclear factor kappa B ligand (RANKL) induced PI3Kδ protein expression, and idelalisib inhibited RANKL-induced osteoclast differentiation. Next, the inhibitory effect of idelalisib on RANKL-induced activation of the Akt-c-Fos/NFATc1 signaling cascade was confirmed by western blot analysis and real-time PCR. Finally, idelalisib inhibited pre-osteoclast migration in the last stage of osteoclast differentiation through down-regulation of the Akt-c-Fos/NFATc1 signaling cascade. It may be possible to expand the clinical use of idelalisib for controlling osteoclast differentiation. Together, the present results contribute to our understanding of the clinical value of PI3Kδ as a druggable target and the efficacy of related therapeutics including osteoclastogenesis.
- Subjects :
- Animals
Dose-Response Relationship, Drug
Male
Mice
Mice, Inbred ICR
Molecular Structure
NFATC Transcription Factors antagonists & inhibitors
NFATC Transcription Factors metabolism
Osteoclasts metabolism
Proto-Oncogene Proteins c-akt antagonists & inhibitors
Proto-Oncogene Proteins c-akt metabolism
Proto-Oncogene Proteins c-fos antagonists & inhibitors
Proto-Oncogene Proteins c-fos metabolism
Purines chemistry
Quinazolinones chemistry
Structure-Activity Relationship
Cell Differentiation drug effects
Cell Movement drug effects
Osteoclasts cytology
Osteoclasts drug effects
Osteogenesis drug effects
Phosphatidylinositol 3-Kinases metabolism
Purines pharmacology
Quinazolinones pharmacology
Signal Transduction drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 1976-3786
- Volume :
- 42
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Archives of pharmacal research
- Publication Type :
- Academic Journal
- Accession number :
- 31161369
- Full Text :
- https://doi.org/10.1007/s12272-019-01163-8