apitolisib (GDC-0980)

CD38 upregulation was done by incubating with 10 or 25 nM panobinostat for 24 h and the apoptosis detection employed Annexin V and Propidium Iodide staining followed by flow cytometry analysis...Among them, we firstly prepared Epirubicin (EPI)-based pADCs, such as DARA-P-EPI, ISA-P-EPI and DRO-P-EPI (Fig.1A)...Notably, co-treatment of RPMI8226 cells with anti-CD38 and GDC0980, a PI3k/mTOR inhibitor, significantly improved cytotoxicity, suggesting DARA's potential for chemo sensitization (Fig.1G)... pADC's innovative design offers a high likelihood of successful clinical development and holds significant promise for MM therapy. Moreover, the unique mechanism provides potential to effectively overcome mAb and multiple drug resistance. Its facile nature allows for easy incorporation of multiple types of payloads into the ADC, making its synthesis highly scalable.

These findings were further validated via rescue experiments using a small molecule inhibitor of PI3K/mTOR (GDC-0980). Our findings suggest that SLC4A7 promotes EMT and metastasis of HNSCC through the PI3K/AKT/mTOR signaling pathway, which may be a valuable predictive biomarker and potential therapeutic target in HNSCC.

P1/2, N=273, Completed, Genentech, Inc. | Active, not recruiting --> Completed

P1/2, N=273, Active, not recruiting, Genentech, Inc. | Trial completion date: Apr 2021 --> Jul 2022

Our data highlight a role of HIF-2α in activating and binding c-MYC, thereby inducing HCC cell proliferation during mild chronic hypoxia. The PI3K/mTORC2/HIF-2α/c-MYC axis may play a key role in this process. The PI3K inhibitor apitolisib may serve as a potential treatment option for patients suffering from HCC, especially in cases with rapidly growing tumors under mild chronic hypoxic conditions.

Such complexity has been clinically evident from the limited efficacy of data in the BOLERO-1 and BOLERO-3 trials, which tested combinations of trastuzumab (T), everolimus, and chemotherapy in women with HER2+ advanced BC. In the following MARIANNE trial also, a combination of T-DM1 plus pertuzumab delivered a non-inferior but yet not superior PFS compared to trastuzumab plus a taxane...Interestingly, both trastuzumab and T-DM1 induce PD-L1 expression in HER2 amplified BC cells. Our data provide evidence that an oncogenic mutation of PIK3CA and HER2-amplification may represent biomarkers to identify patients who may benefit most from the use of GDC-0980 and an opportunity to include immunotherapy in the combination of anti-HER2 therapy.

It investigated a novel preclinical PI3K/mTOR/PIM inhibitor (IBL-301) in vitro and in patient-derived NSCLC tumor tissues...Altered mRNA expression, including activated PIM kinase and c-Myc, was identified in Apitolisib resistant cells (H1975GR) by an IL-6/STAT3 pathway array and validated by Western blot...A miRNA array identified a dysregulated miRNA signature of PI3K/mTOR drug resistance consisting of regulators of PIM kinase and c-Myc (miR17-5p, miR19b-3p, miR20a-5p, miR15b-5p, miR203a, miR-206). Our data provides a rationale for co-targeting PIM kinase and PI3K-mTOR to improve therapeutic response in NSCLC.

P1/2, N=273, Active, not recruiting, Genentech, Inc. | Recruiting --> Active, not recruiting

These findings provide initial proof-of-concept data and rationale for further investigation of GDC-0980 in selected subgroups of pediatric leukemia patients.

P1/2; Active, not recruiting --> Recruiting | Trial completion date: Jul 2019 --> Apr 2021 | Trial primary completion date: Sep 2015 --> Apr 2021

We have used carboplatin and targeted-drugs like olaparib, ABT888, BMN673, AZD2014, GDC0980, and AZD5363 in BRCA-WT (MDA-MB231, MDA-MB468) and BRCA-incompetent (SUM149) TNBC cells. We retrospectively analyzed genomic data [FoundationOne] from 100 consecutive patients seen in our center from 2014. 137 genes were altered including 12 PP and 11 DNA-repair genes.We used AnnexinV-PE staining (Accuri C6), confocal IF imaging and WB expression of apoptotic signals and mitochondrial potential (TMRE-A) as validation criteria following different combinations. Treatment with the rational combination(s) like PARP inhibitor(s) plus carboplatin and PP inhibitor decreased proliferation, induced profound early apoptotic events, along with increased apoptotic signaling and increased mitochondrial depolarization in real time.