Olomoucine II is an inhibitor of cyclin-dependent kinases (CDKs; IC50s = 7.6, 0.1, 19.8, 0.45, and 0.06 μM for Cdk1, -2, -4, -7, and -9, respectively).1It is selective for CDKs over 10 additional kinases (IC50s = >100 μM for all) but does inhibit ERK2 (IC50= 32 μM) and the ATP-binding cassette transporter B1 (ABCB1; IC50= 6.4 μM).1,2Olomoucine II inhibits proliferation of a variety of cancer cells, including those expressing wild-type p53 or mutantp53 (mean IC50s = 7.4 and 10.1 μM, respectively), and it acts synergistically with daunorubicin to inhibit proliferation of HCT-8 cells that endogenously express ABCB1. Olomoucine also inhibits replication of herpes simplex virus 1 (HSV-1), HSV-2, vaccinia virus, human adenovirus type 4 (Ad4), and human CMV (IC50s = 5, 4.7, 3.8, 2.4, and 3.2 μM, respectively) but not measles virus or influenza virus (IC50s = >20 μM for both).3
CC260 is a selective PI5P4Kα and PI5P4Kβ inhibitor with Kis of 40 nM and 30 nM, respectively. CC260 does not inhibit or weakly inhibits other protein kinases, such as Plk1 and RSK2. CC260 can be used for cell energy metabolism, diabetes and cancer research[1]. In cultured C2C12 myotubes, CC260 (20 μM) enhances Insulin-induced Akt phosphorylation at both Thr-308 and Ser-473 but suppresses S6K phosphorylation (Thr-389) by mTORC1[1]. CC260 (2.5 μM, 5 μM, 10 μM, 20 μM) significantly increases phosphorylation of acetyl-CoA carboxylase (ACC) in a dose-dependent manner[1]. CC260 treatment reduces the ability of BT474 cells to survive serum starvation, which could be rescued by expressing the PI5P4Kβ refractory mutant[1]. In BT474 cells, CC260 treatment causes an increase in glycolytic ATP production[1]. [1]. Song Chen, et al. Pharmacological inhibition of PI5P4Kα β disrupts cell energy metabolism and selectively kills p53- tumor cells. Proc Natl Acad Sci U S A. 2021 May 25;118(21):e2002486118.
The protein p53, often called the 'guardian of the genome,' is a transcription factor that is activated in response to cellular stress (low oxygen levels, heat shock, DNA damage, etc.) and acts to prevent further proliferation of the stressed cell by promoting cell cycle arrest or apoptosis. Its role as a tumor suppressor is evident by the observation that approximately 50% of human tumors have mutated or non-functional p53. PK7242 is an inducer of reactivation of mutantp53 in cancer cells. In cancer cells carrying the Y220C mutant, PK7242 binds to the p53-Y220C core domain and induces growth inhibition, cell-cycle arrest, and apoptosis.
CLR01 is a molecular tweezer. CLR01 reduces aggregated, pathologic, and seeding-competent α-synuclein in experimental multiple system atrophy. CLR01 inhibits aberrant superoxide dismutase 1 (SOD1) self-assembly in vitro and in the G93A-SOD1 mouse model of ALS. CLR01 inhibits Ebola and Zika virus infection. CLR01 Stabilizes a Disordered Protein-Protein Interface. CLR01, Modulates Aggregation of the Mutantp53 DNA Binding Domain and Inhibits Its Toxicity.