Inductions of Caspase-, MAPK- and ROS-dependent Apoptosis and Chemotherapeutic Effects Caused by an Ethanol Extract of Scutellaria barbata D. Don in Human Gastric Adenocarcinom Cells

Abstract

Objectives:The crude extracts of Scutellaria barbata D. Don (SB) have traditionally demonstrated inhibitory effects on numerous human cancers both in vitro and in vivo. Gastric cancer is one of the most common types of cancer on world. The authors investigated the effects of an ethanol extract of Scutellaria barbata D. Don (ESB) on the growth and survival of MKN-45 cells (a human gastric adenocarcinoma cell line).Methods:The MKN-45 cells were treated with different concentrations of ESB, and cell death was examined using an MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) assay. Analyses of sub-G1 peaks, caspase-3 and -9 activities, and mitochondrial membrane depolarizations were conducted to determine the anti-cancer effects of SB on MKN-45 cells. Also, intracellular reactive oxygen species (ROS) generation was investigated.Results:ESB inhibited the growth of MKN-45 cells, caused cell cycle arrest, and increased the sub-G1 population. In addition, ESB markedly increased mitochondrial membrane depolarization and the activities of caspase-3 and -9. ESB exerted anti-proliferative effects on MKN-45 cells by modulating the mitogen-activated protein kinase (MAPK) signaling pathway and by increasing the generation of ROS. Furthermore, combinations of anti-cancer drugs plus ESB suppressed cell growth more than treatments with an agent or ESB, and this was especially true for cisplatin, etoposide, and doxorubicin.Conclusion:ESB has a dose-dependent cytotoxic effect on MKN-45 cells and this is closely associated with the induction of apoptosis. ESB-induced apoptosis is mediated by mitochondria- , caspase- and MAPK dependent pathways. In addition, ESB enhances ROS generation and increases the chemosensitivity of MKN-45 cells. These results suggest that treatment with ESB can inhibit the proliferation and promote the apoptosis of human gastric adenocarcinoma cells by modulating the caspase-, MAPK- and ROS-dependent pathway.

The anti-cancer effects and mechanisms of Scutellaria barbata D. Don on CL1-5 lung cancer cells

“…SB inhibits Calu-3 cell growth via suppression of the HER2 pathway and angiogenesis [ 28 ]. SB induces A549 cell apoptosis through the intrinsic mitochondrial pathway [ 58 ]. In our in vitro study, SB-induced CL1-5 cell death occurred through multiple pathways, including the intrinsic mitochondrial-, extrinsic death receptor-, and ER stress-mediated apoptosis pathways, as well as through cell cycle arrest and autophagy.…”

Modified Gexia-Zhuyu Tang inhibits gastric cancer progression by restoring gut microbiota and regulating pyroptosis

“…Its polysaccharide, iridoids, and sfingolipids compositions have significant antitumor effects on the GC [ 14 , 15 ]. The study has shown that the ethanol extract of Scutellaria barbata induces apoptosis through Caspase-, MAPK-, and ROS-dependent pathways, and it exerts chemotherapeutic effects in human gastric adenocarcinoma cells [ 16 ]. Therefore, it is of great interest to explore the therapeutic effects and potential molecular mechanisms of modified GZT in GC.…”

Focal Adhesion Kinase Inhibitor Inhibits the Oxidative Damage Induced by Central Venous Catheter via Abolishing Focal Adhesion Kinase‐Protein Kinase B Pathway Activation

“…The imbalance in the production and consumption of reactive oxygen species (ROS) leads to oxidative stress in cells. Oxidative stress biomarkers (including ROS, nitric oxide (NO), malondialdehyde (MDA), and superoxide dismutase (SOD)) can reflect the degree of cell oxidative damage [ 11 – 13 ]. Therefore, it is necessary to adopt effective antioxidant strategies to reduce the production of ROS, thereby preventing oxidative damage caused by CVC.…”