For research use only.
CAS No. 1225037-39-7
Bimiralisib (PQR309) is a novel brain-penetrant dual PI3K/mTOR inhibitor with in vitro and in vivo antilymphoma activity. It displays excellent selectivity versus PI3K-related lipid kinases, protein kinases and unrelated targets.
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|Description||Bimiralisib (PQR309) is a novel brain-penetrant dual PI3K/mTOR inhibitor with in vitro and in vivo antilymphoma activity. It displays excellent selectivity versus PI3K-related lipid kinases, protein kinases and unrelated targets.|
PQR309 shows in vitro activity with a median IC50 value of 233 nmol/L (95% CI, 174-324 nmol/L) in most of the tesed lymphoma cell lines (increasing doses, 72 hours). The arrest in proliferation is mainly due to cell cycle arrest with a block in G1 rather than to apoptosis, limited to only 2/7 cell lines. PQR309 is more active in B-cell lymphoma cell lines (DLBCL, MCL, CLL, and SMZL) than in the T-cell derived ALCL. PQR309 inhibits PI3K/mTOR signaling in lymphoma cell lines. It has in vitro and in vivo antilymphoma activity as single agent and in combination.
PQR309 is orally available, crosses the blood−brain barrier, and displayed favorable pharmacokinetic parameters in mice, rats, and dogs. It shows little clearance when exposed to rat, dog, and human liver microsomes, with a quicker turnover of PQR309 in mouse liver microsomes, where 40% of the compound was eliminated within 30 min. In female mice, plasma concentrations of PQR309 depended on the drug administration route, resulting in half-lives of approximately 13-36 min for po administration vs 9-10 min for iv administration. PQR309 shows excellent oral bioavailability (>50%). Male Beagle dogs, exposed to PQR309 at 10 mg/kg po, showed maximal drug plasma concentrations Cmax of 583 ng/mL (approximately 1.5 μM) after 60-90 min and a half-life of >7 h, which results in drug levels of approximately 0.38 μM (150 ng/mL) after 24 h. The oral bioavailability in male Beagle dogs was estimated to be 23%. Altogether the PK studies in the three models (female CD-1 mouse, female Sprague-Dawley rats, male Beagle dog) show rapid absorption of PQR309 and good oral bioavailability. PQR309 demonstrates efficiency in inhibiting proliferation in tumor cell lines (PC3 prostate cancer cells) and a rat xenograft model (PC3 xenograft model).
|In vitro||DMSO||6 mg/mL (14.58 mM)|
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Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT02483858||Completed||Drug: PQR 309||Cancer||PIQUR Therapeutics AG|Roswell Park Cancer Institute|M.D. Anderson Cancer Center|Mayo Clinic|Hospital Clinic of Barcelona|University College London Hospitals|Churchill Hospital|Case Western Reserve University|University Hospital Zürich||March 21 2019||Phase 1|
|NCT03127020||Completed||Drug: PQR309||Lymphoma|Non-Hodgkin Lymphoma||PIQUR Therapeutics AG|University Hospital Basel Switzerland|University Hospital Munich|University Hospital Freiburg|Charite University Berlin Germany|University of Stuttgart||June 2016||Phase 2|
|NCT02723877||Completed||Drug: PQR309|Drug: Eribulin||Metastatic Breast Cancer||PIQUR Therapeutics AG|Hospital Universitario Ramon y Cajal|Hospital Universitari Vall d''Hebron Research Institute|Institut Català d''Oncologia|Churchill Hospital|Barts Cancer Institute|Fundación Instituto Valenciano de Oncología||March 28 2016||Phase 1|Phase 2|
|NCT02850744||Terminated||Drug: PQR309||Glioblastoma Multiforme||PIQUR Therapeutics AG|University Hospital Basel Switzerland|University Hospital Inselspital Berne|University Hospital Zürich||July 2015||Phase 2|
|NCT02249429||Completed||Drug: bimiralisib||Lymphoma Malignant||PIQUR Therapeutics AG|University College London Hospitals|Churchill Hospital|Royal Marsden NHS Foundation Trust|University of Haifa|Weill Medical College of Cornell University|Institut Curie|University Clinical Center Sarajevo|Clinical Center Kragujevac|Clinical Center Nis Nis|Institute for Oncology and Radiology Serbia Belgrade|University Clinical Centre of Republic of Srpska||May 2015||Phase 2|
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