Entospletinib (GS-9973) is an adenosine triphosphate competitive inhibitor of Syk that disrupts kinase activity, which is currently in clinical trials for multiple B-cell malignancies. The most common treatment-emergent serious adverse events included dyspnea, pneumonia, febrile neutropenia, dehydration, and pyrexia.

PM-060184 is a new type of marine polyketide isolated from the Madagascan sponge. PM060184 belongs to a new family of tubulin-binding agents. PM060184 is an inhibitor of tubulin polymerization that reduces microtubule dynamicity in cells by 59%. Interestingly, PM060184 suppresses microtubule shortening and growing at a similar extent. PM060184 is able to overcome P-gp mediated resistance in vivo, an effect that could be related to its high binding affinity for tubulin. PM-060184 demonstrated antimitotic properties in human tumor cells lines at subnanomolar concentrations and display a distinct inhibition mechanism on microtubules. An antivascular mechanism is contributing to the antitumor activities of plocabulin. PM-060184 I in phase II clinical trial for the treatment of breast and colorectal cancer.

Glesatinib (MGCD265) is an orally bioavailable, small-molecule, multitargeted tyrosine kinase inhibitor with potential antineoplastic activity. Glesatinib binds to and inhibits the phosphorylation of several receptor tyrosine kinases (RTKs), including the c-Met receptor (hepatocyte growth factor receptor); the Tek/Tie-2 receptor; vascular endothelial growth factor receptor (VEGFR) types 1, 2, and 3; and the macrophage-stimulating 1 receptor (MST1R or RON). Inhibition of these RTKs and their downstream signaling pathways may result in the inhibition of tumor angiogenesis and tumor cell proliferation in tumors overexpressing these RTKs. Studies in a gastric cancer xenograft model revealed that, in addition to the typically reported cellular activities, glesatinib in combination with erlotinib disrupted the glycolysis pathway, suggesting a novel mechanism of action for this drug. Glesatinib has been studied in a variety of advanced solid tumors including NSCLC, as a monotherapy and in combination with either docetaxel or erlotinib. In an ongoing phase 1 study in patients with MET positive or AXL-rearranged advanced solid tumors, glesatinib demonstrated preliminary single-agent activity, with all three patients with MET dysregulated NSCLC (two with METex14 alterations and one with increased GCN) showing significant tumor regression at the first assessment. A phase 2 study is currently recruiting patients with MET-dysregulated (mutated or amplified) advanced or metastatic NSCLC.

GS-9820 (formerly CAL-120) is an oral, small molecule delta selective Phosphatidylinositol 3-kinases (PI3 kinase) inhibitor, a first in class compound, with greater than 200-fold selectivity in cell-based assays for the delta isoform as compared to other class isoforms. GS-9820 is designed to induce cancer cell death and inhibit signaling pathways associated with cancer cell dependence on the tumor microenvironment. GS-9820 is on the phase I of clinical trial, where has to be determined the appropriate dosing regimen of drug in subjects with lymphoid malignancies.

Omipalisib, also known as GSK2126458, is a small-molecule pyridylsulfonamide inhibitor of phosphatidylinositol 3-kinase (PI3K) with potential antineoplastic activity. Omipalisib (GSK2126458, GSK458) is a highly selective and potent inhibitor of p110α/β/δ/γ, mTORC1/2 with Ki of 0.019 nM/0.13 nM/0.024 nM/0.06 nM and 0.18 nM/0.3 nM in cell-free assays, respectively. It is also a low picomolar inhibitor of the common activating mutants of p110a (E542K, E545K, and H1047R) found in human cancer. Omipalisib (GSK2126458) binds to and inhibits PI3K in the PI3K/mTOR signaling pathway, which may trigger the translocation of cytosolic Bax to the mitochondrial outer membrane, increasing mitochondrial membrane permeability and inducing apoptotic cell death. Bax is a member of the proapoptotic Bcl2 family of proteins. PI3K, often overexpressed in cancer cells, plays a crucial role in tumor cell regulation and survival. GlaxoSmithKline (GSK) is developing omipalisib, a phosphoinositide 3-kinase/mammalian target of rapamycin (PI3K/mTOR) inhibitor as well as mTOR complex 1 and 2 inhibitor, for the potential oral treatment of cancer and idiopathic pulmonary fibrosis.

Vistusertib (AZ-2014) is a dual inhibitor of mTORC1/mTORC2 which was developed by AstraZeneca for the treatment of cancer. The drug is under clinical development (phase II) in patients with Renal Carcinoma, Squamous Non Small Cell Lung Cancer, Diffuse Large B-Cell Lymphoma, Meningioma, Breast cancer and Gastric cancer, either alone or in combination therapy. Vistusertib penetrates blood-brain barrier.

Derazantinib (ARQ 087) is an investigational, oral, multi-kinase inhibitor designed to preferentially inhibit the FGFR family of kinases with demonstrated activity in FGFR2 genetic alterations, including fusions. In human cancers, FGFRs have been found to be dysregulated by multiple mechanisms, including aberrant expression, mutations, chromosomal rearrangements, and amplifications. FGFR dysregulation has been identified as a driver in a number of cancers, including iCCA, cholangiocarcinoma, bladder, endometrial, breast, gastric, lung and ovarian. Current scientific literature suggests FGFR alterations exist in anywhere from 5% to 40% of these cancers. Derazantinib is a potent FGFR inhibitor that shows strong anti-proliferative activity in cell lines harboring FGFR2 alterations. In clinical testing, the molecule has demonstrated activity in cancerous tumors harboring FGFR2 fusions in iCCA and bladder cancers.