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Ref Type Journal Article
PMID (25700704)
Authors Jalota-Badhwar A, Bhatia DR, Boreddy S, Joshi A, Venkatraman M, Desai N, Chaudhari S, Bose J, Kolla LS, Deore V, Yewalkar N, Kumar S, Sharma R, Damre A, More A, Sharma S, Agarwal VR
Title P7170: A Novel Molecule with Unique Profile of mTORC1/C2 and Activin Receptor-like Kinase 1 Inhibition Leading to Antitumor and Antiangiogenic Activity.
Journal Molecular cancer therapeutics
Vol 14
Issue 5
Date 2015 May
Abstract Text The mTOR pathway is often upregulated in cancer and thus intensively pursued as a target to design novel anticancer therapies. Approved and emerging drugs targeting the mTOR pathway have positively affected the clinical landscape. Recently, activin receptor-like kinase 1 (ALK1), belonging to the TGFβ receptor family, has been reported as an emerging target for antiangiogenic cancer therapy. Here, we describe a novel orally efficacious compound, P7170, that inhibits mTORC1/mTORC2/ALK1 activity with a potent cell growth inhibition. In cell-based assays, P7170 strongly inhibited (IC50 < 10 nmol/L) the phosphorylation of p70S6K (T389) and pAKT (S473). In many cancer cell lines, such as prostate, ovarian, colon, and renal, P7170 treatment resulted in marked cell growth inhibition. Furthermore, it induced G1-S cell-cycle arrest and autophagy. In vitro HUVEC tube formation, in vivo Matrigel plug, and rat aorta ring assays demonstrated that P7170 exhibited significant antiangiogenic activity. In addition, ALK1 knockdown studies in HUVEC confirmed that the antiangiogenic activity of P7170 was primarily due to ALK1 inhibition. Strong inhibition of ALK1 in addition to mTORC1/mTORC2 differentiates P7170 in its mechanism of action in comparison with existing inhibitors. In vivo mouse xenograft studies revealed P7170 to exhibit a significant dose-dependent tumor growth inhibition in a broad range of human tumor types when administered orally at 10 to 20 mg/kg doses. The distinctive pharmacological profile with favorable pharmacokinetic parameters and in vivo efficacy makes P7170 an attractive candidate for clinical development. It is currently being tested in phase I clinical studies.


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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Panulisib Panulisib 2 0
Drug Name Trade Name Synonyms Drug Classes Drug Description
Panulisib P7170|AK15176 ALK Inhibitor 29 DNA_PK Inhibitor 7 mTOR Inhibitor 51 PI3K Inhibitor (Pan) 40 Panulisib (P7170) inhibits Pi3k, mTOR, Alk, and DNA-PK, resulting in inhibition of cancer cell growth (PMID: 25466244, PMID: 25700704).
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
PIK3CA amp ovarian cancer sensitive Panulisib Preclinical Actionable In a preclinical study, Panulisib (P7170) downregulated mTOR pathway signaling in ovarian cancer cells with amplified PIK3CA (PMID: 25700704). 25700704
PTEN loss prostate cancer sensitive Panulisib Preclinical - Cell line xenograft Actionable In a preclinical study, Panulisib (P7170) inhibited tumor growth in PTEN null prostate cancer cell xenograft models (PMID: 25700704). 25700704