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 mutant p53 (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
Acetomycin is a γ-lactone microbial metabolite originally isolated from S. ramulosus that has anticancer activity. It inhibits proliferation of HCT-8 human colon and L1210 mouse leukemia cancer cells.
Flemiphilippin A has antioxidant activity, it shows DPPH radical scavenging activity with effective half maximal concentration (EC50) of 18.36 ug mL. Flemiphilippinin A (5 ug mL) exhibits some level of antitumor activity against human hepatocellular carci
Hellebrigenin has anti-hepatoma activities, it induces cell cycle arrest and apoptosis in human hepatocellular carcinoma HepG2 cells through inhibition of Akt. Hellebrigenin exhibites moderate to strong activity against human HL-60, SF-295, MDA-MB-435, and HCT-8 cancer cell strains without hemolysis of mouse erythrocytes.
Chlorovaltrate K shows moderate cytotoxicity against lung adenocarcinoma (A 549), metastatic prostate cancer (PC-3M), colon cancer (HCT-8) and hepatoma (Bel 7402) cell lines with IC50 values of 0.89-9.76 uM.
Jatamanvaltrate B shows cytotoxicity against lung adenocarcinoma (A549), metastatic prostate cancer (PC-3M), colon cancer (HCT-8),and hepatoma (Bel7402) cell lines.
Volvaltrate B shows cytotoxic activity against the lung adenocarcinoma (A549), metastatic prostate cancer (PC-3M), colon cancer (HCT-8), and hepatoma (Bel7402) cell lines, with IC50 values of 8.5, 2.0, 3.2, and 6.1 uM, respectively.